U.S. patent application number 12/476658 was filed with the patent office on 2010-05-06 for temperature sensing device for selectively measuring temperature at desired locations along an intravenous fluid line.
Invention is credited to Calvin Blankenship, Durward I. Faries, JR., David Hendrix, Bruce R. Heymann.
Application Number | 20100111135 12/476658 |
Document ID | / |
Family ID | 25521443 |
Filed Date | 2010-05-06 |
United States Patent
Application |
20100111135 |
Kind Code |
A1 |
Faries, JR.; Durward I. ; et
al. |
May 6, 2010 |
Temperature Sensing Device for Selectively Measuring Temperature at
Desired Locations Along an Intravenous Fluid Line
Abstract
A temperature sensing device measures the temperature of a fluid
at selected locations along an IV fluid line. The device is secured
to a selected portion of the IV line and includes a temperature
sensor for measuring fluid flowing within that line. The device is
coupled to a temperature display device to display the measured
temperature. The temperature sensing device may include: a housing
with a lower cover to engage the line and a temperature sensor; a
holder movable along the line and including a temperature sensor; a
housing with a lower member including a tip to pierce and measure
temperature of fluid within the line; a resilient member with a
spiral configuration and a tip to pierce and measure temperature of
fluid within the line; a `T`-type fitting including a temperature
sensor; or a `Y`-type fitting including a temperature sensor in the
form of a needle.
Inventors: |
Faries, JR.; Durward I.;
(Las Vegas, NV) ; Heymann; Bruce R.; (Vienna,
VA) ; Blankenship; Calvin; (Frostburg, MD) ;
Hendrix; David; (Ashburn, VA) |
Correspondence
Address: |
EDELL, SHAPIRO & FINNAN, LLC
1901 RESEARCH BOULEVARD, SUITE 400
ROCKVILLE
MD
20850
US
|
Family ID: |
25521443 |
Appl. No.: |
12/476658 |
Filed: |
June 2, 2009 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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10849251 |
May 20, 2004 |
7540864 |
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12476658 |
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09973988 |
Oct 11, 2001 |
7090658 |
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10849251 |
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09380507 |
Apr 24, 2000 |
6824528 |
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PCT/US98/04199 |
Mar 3, 1998 |
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09973988 |
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60040885 |
Mar 3, 1997 |
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60062315 |
Oct 17, 1997 |
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Current U.S.
Class: |
374/148 ;
374/E1.018 |
Current CPC
Class: |
G01K 1/143 20130101;
A61M 5/44 20130101; A61M 5/14 20130101; A61M 2209/04 20130101; A61M
2205/3653 20130101; A61M 5/445 20130101; A61M 5/1689 20130101; A61M
2205/3368 20130101; A61M 5/172 20130101; A61M 5/1483 20130101 |
Class at
Publication: |
374/148 ;
374/E01.018 |
International
Class: |
G01K 1/14 20060101
G01K001/14 |
Claims
1-13. (canceled)
14. A temperature sensing device for measuring temperature of a
fluid flowing within an intravenous fluid line at selected
locations along said fluid line, said device comprising: a fitting
including: first and second open ends each securable to selected
portions of said fluid line; a passage disposed within said fitting
and extending between said first and second open ends to permit
fluid flowing within said fluid line to flow through said fitting;
and a connection port disposed on an exterior surface of said
fitting and in fluid communication with said passage; and a
temperature sensor disposed within said connection port to measure
temperature of fluid flowing through said fitting.
15-33. (canceled)
34. A method of measuring temperature of a fluid flowing within an
intravenous fluid line at selected locations along said fluid line
via a temperature sensing device including a fitting including
first and second open ends, a passage disposed within said fitting
and extending between said first and second open ends to permit
fluid flowing within said fluid line to flow through said fitting
and a connection port disposed on an exterior surface of said
fitting and in fluid communication with said passage, and a
temperature sensor to measure temperature of fluid flowing through
said fitting, said method comprising the steps of: (a) securing
said first and second ends of said fitting to selected portions of
said fluid line; and (b) measuring a temperature of fluid flowing
through said fitting via said temperature sensor.
35-58. (canceled)
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation-in-part of copending U.S.
patent application Ser. No. 09/380,507, filed Apr. 24, 2000,
entitled "Method and Apparatus for Pressure Infusion and
Temperature Control of Infused Liquids", which is a National Stage
Application of PCT International Application No. PCT/US98/04199,
filed Mar. 3, 1998, entitled "Method and Apparatus for Pressure
Infusion and Temperature Control of Infused Liquids", which claims
priority from U.S. Provisional Patent Application Ser. Nos.
60/040,885, filed Mar. 3, 1997, entitled "Method and Apparatus for
Measurement and Control of Temperature for Infused Liquids" and
60/062,315, filed Oct. 17, 1997, entitled "Method and Apparatus for
Pressure Infusion and Temperature Control of Infused Liquids". The
disclosures of the foregoing patent applications are incorporated
herein by reference in their entireties.
BACKGROUND OF THE INVENTION
[0002] 1. Technical Field
[0003] The present invention pertains to temperature sensing
devices for monitoring temperature of intravenous fluid. In
particular, the present invention pertains to temperature sensing
devices that monitor the temperature of intravenous fluids at any
desirable location along a fluid line (e.g., an intravenous fluid
line) to ensure a desired fluid temperature is maintained within
the fluid line prior to entering a patient.
[0004] 2. Discussion of Related Art
[0005] Intravenous (IV) fluids are typically infused within a
patient utilizing a liquid filled bag or container and an IV fluid
line for delivering fluids under gravity and/or applied pressure
from the container to the patient. It is important in many
situations that the temperature of the fluid within the IV line be
maintained within a desirable and safe temperature range upon
entering the patient so as to eliminate any potential for thermal
shock and injury to the patient by the fluid.
[0006] Accordingly, the related art provides several devices that
employ temperature sensors to monitor and/or control the
temperature of fluid flowing within an intravenous or other type of
fluid line. For example, U.S. Pat. No. 5,729,653 (Magliochetti et
al.) discloses a device for heating a fluid to a body temperature
prior to delivery of the fluid to a patient. In one embodiment, a
fluid to be warmed prior to delivery to a patient can be passed
through a flow through chamber disposed in the fluid delivery line.
An electrically resistive heating element for heating the fluid can
be molded into the chamber to heat the fluid from room or ambient
storage temperatures to a body temperature of the patient. A probe
of a temperature monitoring element can be used to monitor the
temperature of the fluid exiting the chamber. In another
embodiment, this information can be relayed back to a controller
for controlling the power to the resistance element, and hence, the
temperature of the fluid. In still another embodiment, an infrared
temperature sensor can be used for monitoring the temperature of
the fluid exiting the chamber by scanning through a window in the
chamber outlet port or elsewhere in the fluid line. The device may
further include an LED two-digit display of the exiting fluid
temperature for visual temperature monitoring.
[0007] U.S. Pat. No. 5,250,032 (Carter, Jr. et al.) discloses a
heater for warming blood, plasma and other solutions flowing
through an IV tube prior to entry into a patient. The heater is
releasably secured to a patient and includes a housing having an
elongated channel extending from one end of the housing to its
other end. The channel is formed with an elongated slot against
which a heating element is mounted. The heating element is
controlled by a control circuit and powered by batteries. The
control circuit may energize the heating element continuously or
cyclically in response to sensed temperatures.
[0008] U.S. Pat. No. 3,526,134 (Schaus) discloses a thermobulb
mount for holding a temperature sensing element in a pipeline so as
to prevent damage to the element which might otherwise be caused by
fluid flow within the pipeline. The mount includes a body having
threaded ends for connection in series with a pipeline, an
installation boss with a hole through which the sensing element
extends and a recess formed on the inside of the pipeline opposite
the boss for supporting an outboard end of the sensing element.
[0009] U.S. Pat. No. 5,829,880 (Diedrich) discloses a device
including a T-type pipe combination including a medium conduction
pipe and a connection piece projecting away from the pipe. The pipe
is connected to tubing that supplies medium to and leads medium
away from the pipe. A plug unit is disposed within the connection
piece and includes a stopper supporting contact pins and a
temperature sensor connected to those pins. The temperature sensor
indirectly measures the temperature of the medium flowing through
the pipe. An electrical bush part is further secured to the
connection piece via a bracket and is connected to the contact
pins. The bush part housing includes contact bushes with electrical
connecting lines that extend externally of the housing through
openings defined therein.
[0010] U.S. Pat. No. 4,138,890 (Brown) discloses a temperature
indicating probe including a liquid-in-glass thermometer encased
within a housing. The housing includes a series of tapered,
cylindrical shaped portions separated by a step or shoulder, which
are respectively insertable into variously sized standard medical
appliance line openings or fittings, for sensing and indicating the
temperature of the working fluids being carried through the
line.
[0011] The related art suffers from several disadvantages. In
particular, the Magliochetti et al. and Carter, Jr. et al. systems
employ temperature measurement in combination with temperature
control, thereby increasing system complexity and costs to employ
those systems for temperature measurement functions. Further, the
size and/or mounting requirements for those systems tend to
restrict system application to particular sections of an IV line.
Thus, operators are required to estimate, or adjust system settings
to compensate for, conditions at desired IV line sites outside the
system application range. This tends to lead to inaccuracies in
fluid temperature control and measurement for the desired sites,
thereby risking injury to a patient. In addition, the Carter, Jr.
et al. system measures temperature for temperature control of fluid
without providing any temperature indication to an operator,
thereby enabling infusion of fluid of unknown temperature into a
patient.
[0012] The Schaus, Hollweck et al. and Diedrich devices are
designed for non-medical fluid systems. Accordingly, these devices
are employed for non-sterile applications and are ill-suited for
medical applications that require sterility. Although these devices
measure fluid temperature, the devices generally do not provide a
displayed temperature to an operator. Thus, fluids may attain
inappropriate temperatures without notice to the operator which may
lead to undesirable conditions or consequences. The Brown device
requires an operator to manually observe a thermometer and
determine a fluid temperature therefrom. This is distracting to the
operator and permits possible operator error to be introduced with
respect to the fluid temperature measurement, thereby enabling
infusion of fluid at an inappropriate temperature and risking
injury to the patient.
OBJECTS AND SUMMARY OF THE INVENTION
[0013] Accordingly, it is an object of the present invention to
measure the temperature of a fluid within an IV line via a
temperature sensing device selectively securable to a desired site
along that line.
[0014] It is another object of the present invention to obtain an
accurate and reliable temperature indication of fluid within an IV
line at any desired location along that line and display the
temperature indication to an operator.
[0015] Yet another object of the present invention is to removably
secure a temperature sensing device to an IV line and facilitate
measurement of fluid temperatures at varying locations along that
line.
[0016] Still another object of the present invention is to
facilitate re-use of a temperature sensor with a temperature
sensing device to measure the temperature of sterile fluid while
maintaining fluid sterility.
[0017] A further object of the present invention is to measure and
display the temperature of fluid within an IV line via a line
fitting employing a temperature sensor coupled to a display
device.
[0018] The aforesaid objects may be achieved individually and/or in
combination, and it is not intended that the present invention be
construed as requiring two or more of the objects to be combined
unless expressly required by the claims attached hereto.
[0019] According to the present invention, a temperature sensing
device measures the temperature of a fluid at selected locations
along an IV fluid line. The device is secured to a selected portion
of the IV line and includes a temperature sensor for measuring
fluid flowing within that line. The device is coupled to a
temperature display device in communication with the temperature
sensor to provide an indication of measured fluid temperature to an
operator.
[0020] The temperature sensing device may include a housing
removably secured to a selected portion of the IV line. The housing
includes a pivotable lower cover to engage the line and a
temperature sensor disposed proximate the engaged line section to
indirectly measure fluid temperature. The temperature sensor is
coupled to a temperature display device to display the measured
temperature to an operator.
[0021] Alternatively, the device may be in the form of a holder
secured to a selected portion of the IV line. The holder is movable
along the line and includes a temperature sensor disposed proximate
the line to indirectly measure fluid temperatures at line locations
secured to the holder. The temperature sensor is coupled to a
temperature display device to display the measured temperature to
an operator.
[0022] The temperature sensing device may alternatively include a
housing with upper and lower members pivotally connected to each
other and receiving an IV line therebetween. The lower member
includes a temperature sensing tip configured to pierce the secured
portion of the IV line. The tip directly contacts and measures
temperature of fluid within the line, and is coupled to a
temperature display device to display the measured temperature to
an operator. Further, the temperature sensing device may include a
resilient member having a spiral or overlapping configuration to
surround a selected portion of the IV line. The resilient member
includes a temperature sensing tip configured to pierce the
selected IV line portion. The tip directly contacts and measures
temperature of fluid within the line, and is coupled to a
temperature display device to display the measured temperature to
an operator.
[0023] The temperature sensing device may be in the form of a
fitting securable to selected portions of the IV line. The fitting
may be a `T`-type fitting including a fluid conduit and a
projection including a thermally conductive receptacle to receive a
temperature sensor. The receptacle is disposed in direct contact
with the fluid to enable temperature measurement by the temperature
sensor. The sensor may alternatively be disposed in direct contact
with the fluid (e.g., without employing the receptacle), while a
securing mechanism may further be employed to releasably secure the
temperature sensor to the fitting. The temperature sensor is
coupled to a temperature display device to display the measured
temperature to an operator. Alternatively, the fitting may be a
`Y`-type fitting and include a temperature sensor configured in the
form of a syringe or needle for insertion into a fitting branch to
measure fluid temperature. The sensor is coupled to a temperature
display device to display the measured temperature to an operator.
The sensor may further be employed with a sheath to permit re-use
of the sensor while maintaining fluid sterility.
[0024] The above and still further objects, features and advantages
of the present invention will become apparent upon consideration of
the following detailed description of specific embodiments thereof,
particularly when taken in conjunction with the accompanying
drawings, wherein like reference numerals in the various figures
are utilized to designate like components.
BRIEF DESCRIPTION OF THE DRAWINGS
[0025] FIG. 1 is an exploded front view in elevation and partial
section of a temperature sensing device attached to an IV fluid
line in accordance with the present invention.
[0026] FIG. 2 is a view in perspective of the temperature sensing
device of FIG. 1 coupled to a temperature display device for use
with an infusion apparatus in accordance with the present
invention.
[0027] FIG. 3 is a front view in elevation and partial section of a
temperature sensing device for an IV fluid line in the form of a
holder in accordance with the present invention.
[0028] FIG. 4 is a view in perspective of a temperature sensing
device including a housing securable to an IV fluid line to measure
temperature of fluid therein in accordance with the present
invention.
[0029] FIG. 5 is a front view in elevation of a locking mechanism
of the temperature sensing device of FIG. 4.
[0030] FIG. 6 is a view in perspective of a temperature sensing
device for an IV fluid line including a spiral or overlapping
configuration in accordance with the present invention.
[0031] FIG. 7 is a front view in elevation of the temperature
sensing device of FIG. 6.
[0032] FIG. 8 is a view in perspective of a temperature sensing
device for an IV fluid line in the form of a line fitting in
accordance with the present invention.
[0033] FIG. 9A is an exploded view in perspective of a temperature
sensing device in the form of a line fitting and including a
thermally conductive receptacle for receiving a temperature sensor
in accordance with the present invention.
[0034] FIG. 9B is a view in perspective of the thermally conductive
receptacle of the temperature sensing device of FIG. 9A.
[0035] FIG. 10 is a view in perspective of a temperature sensing
device including a securing mechanism in accordance with the
present invention.
[0036] FIG. 11 is a side view in elevation of the temperature
sensing device of FIG. 10.
[0037] FIG. 12A is a side view in elevation and section of the
securing mechanism of the temperature sensing device of FIG.
10.
[0038] FIG. 12B is a bottom view in perspective of the securing
mechanism of FIG. 12A.
[0039] FIG. 13 is a view in perspective of a temperature sensing
device including an alternative line fitting configuration in
accordance with the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0040] A temperature sensing device for measuring the temperature
of a fluid within an IV fluid line at operator selected locations
along the line is illustrated in FIG. 1. Specifically, a
temperature sensing device 2 may be removably affixed around any
selected portion of an IV line 30. The device includes a housing
member 4 and a cap member 6, wherein each member is typically
constructed of an appropriate material (e.g., plastic) having
suitable insulative properties to ensure the accuracy of
temperatures measured for the portion of a fluid line disposed
between the housing and cap members. Housing member 4 has a
generally rectangular configuration and includes a channel 10
extending between the longitudinal ends of the housing member and
having suitable dimensions to receive a selected portion of fluid
line 30 and a temperature sensor 20. However, the housing member
may have any geometric configuration suitable for operation of the
device as described below. Channel 10 typically includes a sensor
receiving area 12, a fluid line receiving area 14 and an open
bottom portion defined in a bottom surface 16 of the housing member
that provides access to the channel to permit an operator selected
portion of IV line 30 to be received within fluid line receiving
area 14. Sensor receiving area 12 has a configuration complimentary
to temperature sensor 20 to receive and secure the temperature
sensor therein. By way of example only, temperature sensor 20 and
the sensor receiving area 12 include a generally cylindrical
configuration. Fluid line receiving area 14 of channel 10 has a
generally rectangular configuration and extends from a lower
section of the sensor receiving area. The fluid line receiving area
further includes a tapered section that narrows the channel toward
bottom surface 16 of the housing member. The tapered section is
further dimensioned to frictionally engage and secure the IV line
within the device.
[0041] Temperature sensor 20 may be implemented by any type of
conventional or other temperature sensor (e.g., RTD, IR, NTC,
thermistors, thermocouples, etc.) suitable for operation of the
device as described below. The temperature sensor may be secured
within sensor receiving area 12 of the housing member channel in
any suitable manner (e.g., adhesion, frictional engagement, etc.).
The temperature sensor is positioned within the sensor receiving
area and is disposed proximate and/or in direct contact with the IV
line portion disposed within fluid line receiving area 14 to obtain
a temperature measurement of fluid within that line.
[0042] Cap member 6 is generally rectangular and pivotally
connected to the housing member bottom surface to secure a portion
of the IV line within channel 10. The cap member basically
facilitates insertion and removal of an IV line portion within the
channel and may be connected to the housing member via a pin 22.
The pin is inserted through a pivotal aperture 24 defined within
the cap member toward a cap member front corner (e.g., front left
corner as viewed in FIG. 1). Pin 22 extends through the cap member
and is received within a pin receiving aperture 26 that is defined
within housing member bottom surface 16 and substantially aligned
with aperture 24. The pin may be secured within the pin receiving
aperture in any suitable manner (e.g., threaded engagement,
adhesion, etc.). The cap member pivotal aperture preferably
includes transverse cross-sectional dimensions that are slightly
greater than those of the pin to permit rotational movement of the
cap member with respect to the pin and the housing member when the
pin is secured within pin receiving aperture 26. Alternatively, the
housing and cap members may be connected to each other via hinges
or any other suitable connection mechanism.
[0043] The temperature sensing device is typically disposed along
IV line 30 of an infusion apparatus as illustrated in FIG. 2.
Specifically, the infusion apparatus includes an IV pole 42, a
solution bag 40 suspended therefrom and IV line 30 enabling flow of
solution from the solution bag to a patient. Sensing device 2 is
disposed along line 30 and is in communication with a temperature
display or monitor device 50 to provide an operator with
indications of fluid temperature measurements at operator selected
locations along the IV line. The monitor device may communicate
with the fluid device in any suitable manner (e.g., electrical
line, RF, IR, etc.). Monitor device 50 typically includes a
temperature display 52 (e.g., LED or LCD), a plurality of input
devices or buttons 54 and a processor to control monitor device
operation and determine fluid temperature based on signals received
from the temperature sensing device. The display typically
indicates the temperature measured by temperature sensor 20, and
may further indicate a desired or set-point temperature entered by
the operator via buttons 54. The monitor device may further provide
an indication when the temperature measured by sensor 20 falls
within a desired range of the set-point temperature. In addition,
the monitor device may include a printer and/or data recorder to
print and/or record data associated with the measured IV fluid
temperature. Exemplary monitor devices for use with the temperature
sensing device include a Fluke 50S hand-held thermometer available
from Fluke Corporation and a printing thermometer available from
Extech Instruments.
[0044] Operation of the temperature sensing device is described
with reference to FIGS. 1-2. Initially, an operator rotates cap
member 6 with respect to housing member 4 to expose channel 10. If
temperature sensor 20 is not already disposed within the housing
member, the sensor may be inserted and secured within sensor
receiving area 12. The temperature sensing device is subsequently
secured to IV line 30 by inserting a selected portion of the IV
line within fluid line receiving area 14 of housing member channel
10 such that part of the IV line wall frictionally engages the
tapered section within the channel. Upon securing the IV line
portion within the channel, cap member 6 is maneuvered to secure
the IV line within the temperature sensing device. Temperature
sensor 20 measures the temperature of fluid within the secured IV
line portion and provides temperature measurements to monitor
device 50 for display to an operator. The temperature sensing
device may further provide temperature measurements of fluid at
other locations within the IV line by placing the device at any
location along the IV line (e.g., as shown by arrow 60 in FIG. 2)
as described above. For example, temperature sensing device 2 may
be placed along IV line 30 toward IV solution bag 40 on IV pole 42
or, alternatively, toward the infusion point on the subject (not
shown). Thus, the device allows the operator to determine the fluid
temperature at any point along the IV line with minimal disruption
to the infusion procedure. The temperature sensing device further
ensures proper mounting of the temperature sensor with respect to
the IV line, thereby enabling a precise temperature measurement of
fluid (i.e., not skin or ambient temperature) at specific locations
within the IV line. The temperature sensing device may be removed
from the IV line by moving cap member 6 with respect to housing
member 4 to expose channel 10, and removing the secured portion of
IV line 30 from the channel. The temperature sensing device may
subsequently be removably attached to and utilized with additional
IV lines without compromising sterility of the fluid.
[0045] A temperature sensing device in the form of a holder is
illustrated in FIG. 3. Specifically, device 100 includes a
substantially flat rectangular base 102 having curved prongs 104,
106 extending away from the base and curving toward each other. A
generally rectangular platform 112 is attached to base 102 and has
dimensions that are greater than those of the base. The platform
may include various fastening mechanisms (e.g., hook and loop
fasteners, tape, gel, etc.) and may be fastened to a patient (e.g.,
an arm or other body portion) during temperature measurement along
the IV line. Prongs 104, 106 are resilient and may be spread from
each other slightly to allow insertion of a portion of the IV line
and the temperature sensor therebetween as described below. Prongs
104, 106 each respectively include a longitudinally extending
groove 114, 116 and a transversely extending projection 108, 110.
The grooves are defined in the prongs between projections 108, 110
and base 102, while the projections extend from the distal sections
of the respective prongs toward each other. The projections
basically serve as a stop to guide the temperature sensor in an
appropriate position within device 100. A groove or channel 120 is
defined in base 102 and extends in a longitudinal direction. The
groove is dimensioned to receive and engage a selected portion of
IV line 30. A temperature sensor 124 is dimensioned to be
frictionally retained between prongs 104, 106 with sensor portions
disposed within grooves 114, 116 and projections 108, 110 serving
as a stop for the temperature sensor. The temperature sensor is
disposed proximate the IV line portion located within groove 120.
Thus, the temperature sensor engages and is in direct contact with
the IV line portion disposed within channel 120 to obtain an
accurate temperature measurement of the liquid flowing within that
IV line portion. The temperature sensor is substantially similar to
and functions in substantially the same manner as the temperature
sensor described above. In operation, temperature sensor 124 is
typically inserted between prongs 104, 106 after insertion of a
portion of fluid line 30 within groove 120 of base 102. Placement
of the sensor between the prongs allows the device to slide along
the IV line while maintaining direct contact between the sensor and
the IV line. A temperature display or monitor device (not shown),
substantially similar to the monitor device described above, is in
communication (e.g., via a wire, RF or IR communication, etc.) with
temperature sensor 124 to display temperature of fluid within the
secured IV line portion measured by the temperature sensor.
[0046] The temperature sensing device may provide a direct
measurement of fluid temperature within a selected portion of the
IV line by puncturing the line with a temperature sensing probe as
illustrated in FIGS. 4-5. Specifically, temperature sensing device
200 is securable to an operator selected portion of an IV line 230.
The device includes a generally rectangular housing 201 with an
upper member 202 and a lower member 204. The upper and lower
members are generally rectangular with rounded corners and are
pivotally connected to each other at corresponding sides via a
hinge member 205. This allows selective engagement between an
internal surface 206 of upper member 202 and an internal surface
208 of lower member 204 as described below. However, the upper and
lower members may be connected to each other in any suitable manner
to facilitate opening and closing of the housing. The lower and
upper members of the housing may be constructed of any suitable
rigid materials (e.g., plastic, metal, etc).
[0047] A generally semi-circular groove 209 is defined within the
internal surface of the upper member, while the lower member
internal surface includes a generally semi-circular groove 210
defined therein in substantial alignment with groove 209. The
grooves extend along their respective internal surfaces between the
longitudinal ends of the upper and lower members to collectively
form a longitudinal channel through the housing when the upper and
lower members engage each other. The longitudinal channel is
appropriately dimensioned to receive a selected portion of IV line
230 for directly measuring temperatures of fluids flowing within
the received IV line portion.
[0048] A temperature probe 212 is embedded within lower member 204
and extends from groove 210 toward an opposing, external surface of
the lower member. Specifically, the probe includes a base 250,
supports 252, 254 and a sensing tip 213. Base 250 is substantially
cylindrical in the form of a disk and includes supports 252, 254
disposed on the base top surface. The supports are generally
semi-circular and each have dimensions less than those of the base
in order to reside on the base top surface. Sensing tip 213 is
substantially cylindrical including a tapered distal end configured
in the form of a spike and dimensions greater than those of the
supports. The sensing tip is disposed on the base top surface
between supports 252, 254. The supports encompass the sensing tip
proximal portion while the tip distal portion extends from the
distal ends of the supports through the lower member internal
surface and within groove 210. Sensing tip 213 is preferably
constructed of stainless steel and is configured to pierce the wall
of the IV line when the line is inserted into the housing and the
housing is subsequently manipulated to a closed state.
Alternatively, sensing tip 213 may project slightly from groove 210
to obtain a temperature measurement by contacting (e.g., without
piercing) the IV line. The temperature sensing tip may be
implemented by any conventional or other type of temperature sensor
(e.g., RTD, IR, NTC, thermistor, thermocouple, etc.) for direct
measurement of fluid temperatures within the IV line. Sensor wiring
214 is connected to base 250 and extends within lower member 204.
The sensor wiring emerges from a side portion of the lower member
below hinge member 205 and is coupled to a temperature display or
monitor device 217. The sensor wiring transmits signals indicating
temperature information from the temperature probe to the monitor
device. The monitor device is substantially similar to the monitor
devices described above and includes a digital display 218 (e.g.,
LCD or LED) for displaying measured temperatures and input devices
219 in the form of buttons for controlling temperature values
displayed on the digital display. The monitor device may further
print, record or provide indications of temperature measurements as
described above.
[0049] Locking tabs 220 extend from the upper member internal
surface with groove 209 disposed between the tabs. Each locking tab
220 is aligned on internal surface 206 of the upper member with a
corresponding generally L-shaped slot 222 defined in the lower
member internal surface with groove 210 disposed between the slots.
The locking tabs each include a shoulder portion 221 that engages
with a lower base or "foot" portion of a corresponding L-shaped
slot 222 to maintain the locking tabs within the slots in response
to pressing the internal surfaces of the upper and lower members
together. Alternatively, device 200 may include any other suitable
locking mechanism to releasably or permanently lock the upper and
lower members together. Upper member 202 further includes a
depression 224 disposed and extending longitudinally on an upper
member external surface. Depression 224 is suitably dimensioned to
receive a digit of a user's hand (e.g., a thumb or forefinger) and
provide an enhanced gripping surface for facilitating closure of
the housing by pressing the upper and lower members together upon
placement of a portion of an IV line therebetween. The housing may
be disposable and configured for a single use, while the
temperature probe may be removably disposed within the housing for
re-use. In this case, the sensing tip may employ a thermally
conductive and disposable cover for each use to maintain fluid
sterility.
[0050] In operation, upper and lower members 202, 204 are separated
from each other such that groove 210 on internal surface 208 of the
lower member is exposed. A selected portion of IV line 230 is
inserted into groove 210 so as to cover sensing tip 213, and upper
member 202 is subsequently pivoted with respect to lower member 204
to align tabs 220 with slots 222. The upper member is pressed
against the lower member (e.g., by using depression 224 as a
gripping surface for the operator's thumb or forefinger) such that
tabs 220 are pressed into slots 222 until shoulders 221 are locked
therein. The pressing force of upper member 202 in a direction
toward lower member 204 simultaneously forces the portion of IV
line 230 disposed between the members toward the lower member
internal surface by action of groove 209. This further causes
sensing tip 213 to pierce the IV line for direct exposure to IV
fluid therein. The sensing tip provides a fluid tight seal between
the temperature sensing device and the IV line once the line is
pierced. Sensor wiring 214 is subsequently connected to temperature
display or monitor device 217 to facilitate display of IV line
fluid temperature measured by temperature probe 212.
[0051] A temperature sensing device of the present invention
including a spiral or overlapping configuration is illustrated in
FIGS. 6-7. Specifically, a temperature sensing device 300 includes
a generally cylindrical resilient member 302 including a
longitudinal channel 310 defined therethrough. The channel includes
dimensions sufficient to receive an operator selected portion of an
IV line 330. The resilient member is noncontinuous along its
exterior surface and includes an exterior end portion 304 and an
opposing interior end portion 306. The exterior and interior end
portions overlap, while the resilient member thickness tapers
toward the overlapping end portions, thereby forming a narrow gap
308 therebetween. Resilient member 302 is constructed of a
resilient material (e.g., plastic) that enables end portions 304,
306 to be separated from each other and facilitate insertion of the
IV line within channel 310. A temperature probe 312 is disposed
through resilient member 302 and into channel 310. The probe
terminates in a sensing tip 313 configured as a spike to pierce the
wall of the IV line inserted within the channel. The resilient
member has sufficient resiliency to drive the sensing tip through
and pierce the line. Alternatively, the resilient member may
include a force application mechanism to provide sufficient force
to enable sensing the tip to pierce the line. The sensing tip may
alternatively obtain a temperature measurement by contacting (e.g.,
without piercing) the IV line. The temperature probe further
includes sensor wiring 314 extending to a temperature display or
monitor device 317 for displaying temperatures measured by the
probe in substantially the same manner described above. The
temperature probe may be implemented by any conventional or other
temperature sensors (e.g., RTD, IR, NTC, thermistor, thermocouple,
etc.). The monitor device is substantially similar to the monitor
devices described above and includes a digital display 318 for
displaying measured temperatures and input devices 319 in the form
of buttons for controlling temperature values displayed on the
digital display. The monitor device may further print, record
and/or provide various temperature indications as described
above.
[0052] In operation, end portions 304, 306 are separated to enable
insertion of an operator selected portion of IV line 330 within
channel 310. The selected IV line portion is inserted between the
separated end portions and into gap 308 while device 300 is
manipulated (e.g., by rotating resilient member 302 around the IV
line) to force the IV line into channel 310. As the IV line enters
the channel, sensing tip 313 engages and pierces an exterior
surface of the IV line to directly contact fluid therein. Thus, the
device functions to retain the sensing tip against the IV line to
facilitate temperature measurements of fluid flowing within the IV
line. Temperature measurement information is transmitted to monitor
device 317 to provide various temperature indications to an
operator as described above.
[0053] A temperature sensing device of the present invention in the
form of a fitting securable to an IV line to measure fluid
temperature is illustrated in FIG. 8. Specifically, a temperature
sensing device 400 includes a fitting 401 including a substantially
cylindrical base portion 402 and a generally cylindrical projection
406 extending transversely from an intermediate section of the base
portion. The base portion includes open ends 404 and a longitudinal
channel defined therethrough to permit fluid flow through the base
portion. The open ends are securable to selected portions of an IV
line 430. The projection similarly includes open ends and
facilitates access to the base portion channel. The fitting
typically includes a T-type configuration, however, any
configuration (e.g., a Y-type fitting, cross fitting, coupling,
etc.) may be utilized. Each base portion open end 404 is typically
releasably secured to the IV line via a Luer lock 405 or any
suitable connector, while the fitting is typically disposable after
each use to maintain fluid sterility. Alternatively, the fitting
may be permanently secured to the IV line (e.g., by welding the
ends of the fitting to portions of the IV line) to form a
disposable IV line set. The fitting may be constructed of plastic
or any other rigid material suitable for use with IV lines.
[0054] Projection 406 serves to engage and secure a temperature
sensor within the fitting. Specifically, a temperature probe 410 is
disposed within projection 406 and extends partially within base
portion 402. Temperature probe 410 may be implemented by any
conventional or other temperature sensor (e.g., RTD, IR, NTC,
thermistor, thermocouple, etc.) and may be secured within the
projection via any securing mechanisms (e.g., friction fit,
adhesives, etc.). The probe is disposed within the projection in a
manner that provides a fluid tight seal with the fitting channel to
maintain IV fluid within the fitting. Sensor wiring 414 is
connected to probe 410 and extends from the fitting to a
temperature display or monitor device 417. The monitor device is
substantially similar to the monitor devices described above and
includes a digital display 418 for displaying measured temperatures
and input devices 419 in the form of buttons for controlling
temperature values displayed on the digital display. The monitor
device may further print, record and/or provide various temperature
indications as described above.
[0055] In operation, device 400 is attached to an IV line by
securing base portion open ends 404 to operator selected portions
of IV line 430. Upon securing the fitting to the IV line in a fluid
tight relationship, IV fluid is permitted to flow through the IV
line and fitting. Sensor wiring 414 is connected to temperature
monitor 417. Temperature probe 410 contacts fluid flowing through
the fitting and directly measures the temperature of the fluid. The
probe transmits the measured temperature information via the sensor
wiring to the monitor device for display of fluid temperature. Upon
completion of an IV fluid temperature measurement or medical
procedure, the sensor wiring may be disengaged from the monitor,
while the fitting is removed from the IV line and discarded.
[0056] The temperature sensing fitting may alternatively facilitate
releasable engagement of the temperature probe as illustrated in
FIGS. 9A-9B. Specifically, a sensing device 500 includes a fitting
501 with substantially the same configuration as fitting 401
described above. Fitting 501 includes a substantially cylindrical
base portion 502 and a generally cylindrical projection 506
extending transversely from an intermediate section of the base
portion. The base portion includes open ends 504 and a longitudinal
channel defined therethrough to permit fluid flow through the base
portion. The projection includes open ends and facilitates access
to the base portion channel. Base portion open ends 504 are
securable to selected portions of an IV line 530 via Luer locks 505
or other connectors in substantially the same manner described
above for device 400. A thermally conductive receptacle 510 is
secured within projection 506 and extends partially within base
portion 502 for contacting fluid flowing within the base portion
channel. Receptacle 510 may be constructed of stainless steel or
any other material having suitable thermal conductivity, and may be
secured within the projection via any suitable securing techniques
(e.g., friction fit, adhesives, etc.). The receptacle includes a
generally cylindrical body 520 with a closed distal end that
extends partially within the base portion and an open proximal end
for receiving a temperature probe 512 as described below. A flange
522 extends radially from the open proximal end of the receptacle
to engage an interior surface of the projection. The receptacle
includes dimensions sufficient to provide a fluid tight seal
between the projection and base portion channel to maintain fluid
within the channel. A temperature probe 512 is removably inserted
within the receptacle with the distal end of the probe in contact
with the receptacle closed end. The probe may be secured within the
receptacle via friction fit, a locking or securing mechanism or any
other securing techniques. Sensor wiring 514 connects the probe to
a temperature display or monitor device 517. The monitor device is
substantially similar to the monitor devices described above and
displays temperatures measured by temperature probe 512 on a
digital display 518 in accordance with manipulation of input
devices or buttons 519. The monitor device may further print,
record and/or provide various temperature indications as described
above. The probe may be re-used with new fittings, while the
receptacle of each new fitting maintains the sterile field for
fluid flowing within that fitting.
[0057] In operation, device 500 is attached to an IV line by
securing base portion open ends 504 to selected portions of IV line
530. Upon securing the fitting to the IV line in a fluid tight
relationship, IV fluid is permitted to flow through the line and
fitting. As fluid flows within the fitting, the receptacle closed
end contacts the fluid, while the receptacle conducts thermal
energy. Temperature probe 512 is inserted into and contacts the
closed end of receptacle 510 to measure the temperature of the
receptacle. Temperature signals are transmitted from the probe
through sensor wiring 514 to the monitor device for display of
fluid temperature to the operator. After completion of an IV fluid
temperature measuring or medical procedure, probe 512 is removed
from receptacle 510 of the fitting, while the fitting may be
discarded. Since the temperature probe does not directly contact
fluid flowing within the IV line, the system facilitates repeated
use of the probe with additional IV lines without the need for
sterilization.
[0058] The temperature sensing device may employ a securing
mechanism for releasably engaging a temperature probe as
illustrated in FIGS. 10-11 and 12A-12B. Specifically, a sensing
device 600 includes a fitting 601 with substantially the same
configuration as fitting 501 described above. Fitting 601 includes
a substantially cylindrical base portion 602 and a generally
cylindrical projection 606 extending transversely from an
intermediate section of the base portion. The base portion includes
open ends 604 and a longitudinal channel defined therethrough to
permit fluid flow through the base portion. The projection includes
open ends and facilitates access to the channel. Base portion open
ends 604 are securable to portions of an IV line 630 via Luer locks
605 or other connectors in substantially the same manner described
above for device 500. A thermally conductive receptacle 610,
substantially similar in configuration to receptacle 510 described
above, is secured within projection 606 and extends partially
within base portion 602 for contacting fluid flowing within the
base portion channel. The receptacle includes a generally
cylindrical body with a closed distal end that extends partially
within the base portion and an open proximal end for receiving a
temperature probe 612 as described below. A flange 622 extends
radially from the open proximal end of the receptacle to engage an
interior surface of the projection. The receptacle includes
dimensions sufficient to provide a fluid tight seal between the
projection and base portion channel to maintain fluid within the
channel in substantially the same manner described above.
[0059] A temperature probe 612 is secured to fitting 601 and
disposed within receptacle 610 via a securing member or cap 616.
Specifically, cap 616 may be constructed of any suitable materials
(e.g., plastic) and includes a generally S-shaped configuration
with ends tapering in thickness to facilitate enhanced gripping.
The cap includes a channel 624 defined in the cap interior and
extending from a cap proximal portion to a cap distal surface. The
channel is dimensioned to receive and retain the fitting
projection. Temperature probe 612 is disposed within the cap
channel and extends beyond the cap distal surface. The channel is
dimensioned to receive and retain the fitting projection, while the
probe includes transverse cross-sectional dimensions slightly less
than those of receptacle 610 to enable insertion of the probe
within the receptacle as described below. The cap proximal surface
includes a support structure 625 disposed thereon to guide sensor
wiring 614 and provide structural support for cap 616. Sensor
wiring 614 is connected to probe 612 and extends from the probe
through the cap proximal surface and support structure 625 to a
temperature display or monitor device 617. The monitor device is
substantially similar to the monitor devices described above and
displays temperatures measured by temperature probe 612 on a
digital display 618 in accordance with manipulation of input
devices or buttons 619. The monitor device may further print,
record and/or provide various temperature indications as described
above.
[0060] Projection 606 further includes tabs 607 disposed toward the
projection proximal end and angularly spaced apart by approximately
one-hundred eighty degrees. Channel 624 includes transverse
cross-sectional dimensions slightly greater than those of the
projection, but less than those of the projection portions
containing tabs 607. In order to accommodate the projection tab
portions, channel 624 includes grooves 615 defined therein and
angularly spaced apart by approximately one hundred eighty degrees.
The grooves extend from the cap distal surface toward the channel
proximal end and include dimensions suitable to accommodate the
tabs. Recesses or notches 617 are defined at the proximal ends of
the respective grooves and are dimensioned to receive and retain
corresponding tabs 607. The transverse cross-sectional dimensions
of the projection tab portions are sightly greater than those of
the channel with grooves 615, but less than the dimensions of the
channel with recesses 617. The grooves basically compress the
projection tab portions due to projection resiliency to receive
those portions in a snug fashion and to guide the tab portions
toward recesses 617. The projection resiliency causes the
projection to expand upon reaching recesses 617, thereby forcing
tabs 607 in a locking engagement with those recesses. Locking of
tabs 607 in corresponding recesses 617 assures that the temperature
probe is positioned in contact with the receptacle within the
projection. In addition, grooves 615 may taper in depth toward
corresponding recesses 617 to assist in guiding tabs 607 through
the grooves and into the recesses.
[0061] Tabs 607 are each configured to be fractured and removed
from the fitting. This prevents the fitting from being re-used for
temperature measurement, thereby maintaining fluid sterility. The
tabs may be removed from the fitting by rotating the cap with
respect to the projection when the tabs are disposed within
recesses 617. The recesses inhibit tab motion, thereby enabling the
rotational force applied to the cap to fracture and remove the tabs
from the fitting. Recesses 617 may further be elongated
transversely on the cap interior surface to permit initial free
rotational movement of cap 616 and enhance application of
rotational force to the cap for fracturing the tabs.
[0062] In operation, temperature device 600 is connected to an
operator selected portion of IV line 630 as described above.
Securing cap 616 is disposed over fitting projection 606 with
temperature probe 612 disposed within the projection and channels
615 aligned with tabs 607. The cap is forced distally onto the
projection to allow tabs 607 to travel proximally through channels
615 and be secured within recesses 617, while the temperature probe
is inserted into receptacle 610. Upon securing the tabs within the
recesses, the cap is effectively locked on the fitting with the
temperature probe contacting the interior surface of receptacle
610. Fluid is permitted to flow within the fitting and directly
contacts a surface of the receptacle closed end extending within
base portion 602. The receptacle conducts thermal energy and the
receptacle temperature is measured by the temperature probe and
subsequently displayed on the monitor device. Once the temperature
measurement or medical procedure is completed, the locking
engagement between the cap and fitting may be released by rotating
the cap relative to the projection. This causes the tabs to
fracture and be removed from the projection, thereby disengaging
the cap and temperature probe from the fitting. Thus, device 600
facilitates temperature measurement without direct contact of fluid
and employs a temporary locking arrangement between the temperature
probe and the fitting, thereby allowing reuse of the probe and
securing cap with additional fittings without the need for
sterilization. Further, the fitting is limited to a single use for
temperature measurement to prevent contamination of sterile fluid.
In addition, the tabs may notify an operator of fitting use.
Basically, since the securing cap removes the projection tabs after
use, the absence of those tabs on the fitting indicates that the
fitting has been previously used and may compromise sterile
conditions when used for another application.
[0063] A temperature sensing device in the form of a fitting
typically utilized for permitting injection of fluids into an IV
line is illustrated in FIG. 13. Specifically, a temperature sensing
device 700 includes a fitting 701 with a substantially cylindrical
base portion 702 and a generally cylindrical inlet portion 706
extending from, and at an approximate forty-five degree angle
relative to, an intermediate section of the base portion. The base
and inlet portions each include a longitudinal channel defined
therethrough to permit fluid flow through those portions. The
fitting inlet portion receives an IV line 730 connected to a fluid
source, while the base portion distal end is secured to an IV line
740 for conveyance of fluid to a patient. The fitting may be
secured to the IV line portions via locks or connectors in
substantially the same manner described above. The fitting
typically includes a Y-type configuration, however, any type of
fitting configuration may be employed.
[0064] The proximal section of the base portion includes transverse
cross-sectional dimensions greater than those of the base portion
distal section and houses a flexible membrane 710. The flexible
membrane is constructed of a penetrable nylon or other suitable
material that provides a barrier for permitting insertion and
removal of a syringe needle or other instrument therethrough, while
maintaining a fluid tight seal at the base portion proximal end. A
temperature probe 712 is inserted through the membrane and into the
fitting to measure the temperature of fluids flowing therein. In
particular, probe 712 is configured in the from of a syringe needle
and includes a sensing tip 713 disposed at a probe distal end and a
handle 715 disposed at a probe proximal end. The handle provides a
gripping surface for an operator when inserting the sensing tip
through the membrane. The temperature probe may be implemented by
any conventional or other temperature sensor (e.g., RTD, IR, NTC,
thermistor, thermocouple, etc.). Sensor wiring 714 extends from the
probe to a temperature display or monitor device 717. The monitor
device is substantially similar to the monitor devices described
above and displays the measured temperatures on a digital display
718 in accordance with manipulation of input devices or buttons
719. The monitor device may further print, record and/or provide
various temperature indications as described above.
[0065] In operation, fitting 701 is secured to an operator selected
portion of an IV line as described above. Temperature probe 712 is
inserted through flexible membrane 710 at the base portion proximal
end until sensing tip 713 is completely disposed within the fitting
and in contact with fluid flowing therein. The probe is connected
to the monitor device and fluid temperatures are measured and
subsequently displayed as described above. Upon completion of a
temperature measurement or medical procedure, the probe may be
removed from the fitting and sterilized and reused. Alternatively,
device 700 may include a sheath (not shown) constructed of
stainless steel or any other suitable thermally conductive material
to cover the sensing tip during use. The sheath maintains sterility
of the fluid and permits reuse of the sensing tip without
sterilization. The sheath may either be discarded or sterilized and
reused after completion of a temperature measurement or medical
procedure.
[0066] It will be appreciated that the embodiments described above
and illustrated in the drawings represent only a few of the many
ways of implementing a temperature sensing device for selectively
measuring temperature at desired locations along an intravenous
fluid line.
[0067] The temperature sensing device including the housing and cap
members may be of any shape or size and may be constructed of any
suitable materials. The device may be secured at any locations
along an IV or any other fluid line. The housing and cap members
may be of any quantity, shape or size, and may be constructed of
any suitable materials. The housing member channel may be of any
quantity, shape or size and may be defined within the housing
member at any location and extend in any direction. The sensor and
fluid line receiving areas may be of any quantity, shape or size,
may be defined at any suitable locations and may receive the sensor
and fluid line in any manner (e.g., friction fit, securing
mechanism, etc.). The cap member may be attached to the housing
member via any quantity of any type of fasteners or connectors or
in any other manner. The pin and apertures may be of any quantity,
shape or size. The apertures may be defined in the housing and cap
members at any desired locations. The housing member may further
include any suitable locking mechanism to releasably or
non-releasably lock the fluid line within the housing member.
[0068] The temperature sensors or probes of the temperature sensing
devices described above may be implemented by any quantity of any
type of conventional or other temperature measuring devices (e.g.,
RTD, IR, NTC, thermistors, thermocouples, etc.). The sensors may be
of any shape or size to accommodate a particular application. The
temperature display or monitor devices described above may be
implemented by any quantity of conventional or other processing
devices or circuitry to determine and display fluid temperature.
The display devices may include processors and various indicators
(e.g., visual, audio, speech synthesis, etc.) to indicate the
measured temperature and notify of occurrence of any type of
temperature or other conditions. The temperature sensors may
communicate with the display devices via any communications medium
(e.g., wired, wireless, IR, etc.). The display devices may include
any quantity of any type of conventional or other displays (e.g.,
LCD, LED, etc.) of any size or shape disposed at any suitable
locations. The display devices may display any desired information
(e.g., time, temperature, date, patient information, etc.), and may
be disposed at any locations (e.g., near or away from the
temperature sensing device) within view of an operator. The display
device may employ any type of input devices (e.g., keypad, buttons,
voice recognition, touch screen, etc.) and may further include any
types of processing, printing and/or recording devices to process,
print and/or record any desired information in any desired
fashion.
[0069] The temperature sensing device in the form of a holder may
be of any shape or size and may be constructed of any suitable
materials. The base, platform and prongs may be of any quantity,
shape or size, may be connected or arranged in any fashion and may
be constructed of any suitable materials. The platform may include
any quantity of any type of fastening mechanism (e.g., gel,
adhesives, hook and loop fasteners, etc.) to secure the holder to
any portion of a patient (e.g., arm, leg, etc.). The fastening
mechanism may be disposed at any locations on the platform or
holder. The grooves defined in the prongs may be of any quantity,
shape or size, may be defined at any suitable locations and may
extend in any desired direction. The prongs may include any
suitable configuration and extend in any desired directions. The
prong projections may be of any quantity, shape or size and may be
disposed at any suitable locations on the prongs or holder. The
base groove may be of any quantity shape or size, may be defined in
the base or holder at any desired locations and may extend in any
directions. The groove may receive and secure any type of fluid
line in any desired manner (e.g., friction fit, securing mechanism,
etc.). The holder may include any configuration to secure the
temperature sensor and/or fluid line in any desired manner.
[0070] The temperature sensing device including the upper and lower
members may be of any quantity, shape or size and may be
constructed of any suitable materials. The upper and lower members
may be of any quantity, shape or size and may be constructed of any
suitable materials. The upper and lower members may be attached to
each other via any type of conventional or other securing mechanism
(e.g., hinges, brackets, etc.). The grooves defined in the upper
and lower members may be of any quantity, shape or size and may be
defined in the members at any desired locations and may extend in
any desired directions. The grooves may form a channel of any
quantity, shape or size to accommodate any type of fluid line. The
temperature sensor may be of any quantity and may be disposed
within the upper and/or lower member at any suitable locations. The
temperature sensor base and supports may be of any quantity, shape
or size and may be constructed of any suitable materials. The
sensing tip may be of any shape or size, may be constructed of any
suitably thermally conducting materials and may be configured
and/or disposed to puncture and/or contact the fluid line to
measure fluid temperature.
[0071] The tabs and slots of the upper and lower members may be of
any quantity, shape or size and may be disposed on the upper and
lower members at any desired locations. The upper and lower members
may include any conventional or other locking mechanism to
permanently or releasably secure the members together. The
depression may be of any quantity, shape or size, may be disposed
at any desired locations on the upper and/or lower members and may
receive any quantity of portions of an operator body (e.g., hand,
fingers, etc.). A cover may be employed for use with the
temperature sensor to maintain fluid sterility and permit re-use of
the sensor. The cover may be of any quantity, shape or size and may
be constructed of any suitable thermally conducting materials.
[0072] The temperature sensing device including a spiral
configuration may be of any quantity, shape or size and may be
constructed of any suitable materials. The device may include any
resilient member configured in any fashion to wrap around a fluid
line. The channel may be of any shape or size and may extend in any
desired direction. The gap between the member ends may include any
suitable dimensions. The temperature probe may be disposed on or
through the resilient member at any desired locations, while the
sensing tip may be of any shape or size, may be constructed of any
suitably thermally conducting materials and may be configured
and/or disposed to puncture and/or contact the fluid line to
measure fluid temperature. The sensing device may include any type
of conventional or other force application mechanism (e.g., spring,
driving mechanism, etc.) to drive the sensing tip to pierce the
fluid line.
[0073] The temperature sensing device in the form of a line fitting
may be of any quantity, shape or size, may be constructed of any
suitable materials and may be disposed at any suitable locations
along the line. The fitting base and projection may be of any
quantity, shape or size and may be constructed of any suitable
materials. The base channel may be of any shape or size, may be
defined in the base at any locations and extend in any desired
directions. The fluid line may be secured to the fitting via any
conventional or other locks or connectors. The base and projection
may be arranged or connected in any fashion, while the fitting may
have any suitable configuration (e.g., T-type fitting, Y-type
fitting, cross fitting, coupling, etc.). The fitting may be
included within and permanently or releasably connected to a
disposable IV line set. The temperature probe may be disposed
within the fitting projection in any manner via any conventional or
other securing mechanisms (e.g., friction fit, adhesives, clamp,
threaded engagement, etc.). The fitting may include a receptacle to
maintain fluid sterility and permit reuse of the temperature probe.
The receptacle may be of any quantity, shape or size, may be
constructed of any suitably thermally conductive materials and may
be disposed at any locations within the projection or fitting
suitable to contact or thermally conduct heat from fluid flowing
within the fitting. The receptacle body and flange may be of any
quantity, shape or size and may be constructed of any suitable
materials. The temperature probe may be secured within the
receptacle via any conventional or other securing techniques (e.g.,
friction fit, threaded engagement, securing mechanism, etc.).
Similarly, the receptacle may be secured within the projection or
fitting via any conventional or other securing techniques (e.g.,
friction fit, adhesives, threaded engagement, securing mechanism,
etc.).
[0074] The securing cap may be of any quantity, shape or size and
may be constructed of any suitable materials. The cap channel may
be of any shape or size, may be defined at any cap locations and
may extend in any desired directions. The temperature probe may be
secured within the securing cap via any conventional or other
securing techniques (e.g., friction fit, threaded engagement,
securing mechanism, etc.). The projection tabs may be of any
quantity, shape or size, may be constructed of any desired
materials and may be disposed at any locations on the projection or
fitting. The channel grooves and notches may be of any quantity,
shape or size and may be defined at any locations. The tabs may be
secured to the projection or fitting in any manner enabling
fracture or removal of the tabs.
[0075] The temperature sensing device in the form of an injection
fitting may be of any quantity, shape or size, may be constructed
of any suitable materials and may be disposed at any suitable
locations along the line. The fitting base and inlet portions may
be of any quantity, shape or size and may be constructed of any
suitable materials. The base and inlet potion channels may be of
any shape or size, may be defined in the respective portions at any
locations and extend in any desired directions. The fluid line may
be secured to the fitting via any conventional or other locks or
connectors. The base and inlet portions may be arranged or
connected in any fashion, while the fitting may have any suitable
configuration (e.g., T-type fitting, Y-type fitting, cross fitting,
coupling, etc.). The fitting may be included within and permanently
or releasably connected to a disposable IV line set. The
temperature probe may include any type of configuration, but is
preferably in the form of a syringe, needle or other configuration
suitable to penetrate the barrier. The membrane or barrier may be
constructed of any suitable nylon or other material. The probe
sensing tip and handle may be of any shape or size, and may be
disposed at any suitable locations on the probe. The temperature
probe may be employed with a sheath or covering to maintain fluid
sterility and permit re-use of the probe. The sheath may be of any
quantity, shape or size and may be constructed of any suitable
thermally conducting materials.
[0076] It is to be understood that the present invention is not
limited to the specific configurations or applications described
above, and may be utilized to determine the temperature of a fluid
at any desired location within a fluid line. For example, the
temperature sensors or probes may be embedded within, or entirely
or partially wrapped about, the fluid line wall to measure and
provide fluid temperature to the monitor device. Alternatively, the
temperature sensors or probes may be wrapped entirely or partially
about a sensing device or holder, or may be disposed within the
fluid line (e.g., attached to the fluid line inner diameter). The
temperature sensors and probes may be secured to the fluid line or
sensing device or holder via any suitable fastening techniques
(e.g., snap type fasteners, adhesives, etc.), and may cover any
portion of the fluid line and/or sensing device or holder.
[0077] The temperature sensing devices described above may be
employed with any types of infusion apparatus, such as the
apparatus shown in FIG. 2. The temperature sensing devices
described above may be placed at any desired locations along a
fluid line (e.g., attached to those locations or moved along the
fluid line) via any suitable attachment or placement techniques to
measure temperature of fluid at those locations. The manners of
operation of the temperature sensing devices described above may be
modified in any fashion to perform a fluid temperature measurement.
A fluid line may include any quantity of temperature sensing
devices or corresponding components (e.g., temperature sensors or
probes, housings, fittings and/or monitor devices) where
temperature measurements may be combined in any fashion (e.g.,
averaged, weighted, etc.) to determine a fluid temperature.
[0078] It is to be understood that the terms "top", "bottom",
"front", "rear", "side", "height", "length", "width", "upper",
"lower" and the like are used herein merely to describe points of
reference and do not limit the present invention to any particular
orientation or configuration.
[0079] From the foregoing description, it will be appreciated that
the invention makes available a novel temperature sensing device
for selectively measuring temperature at desired locations along an
intravenous fluid line, wherein a temperature sensing device is
selectively secured to an intravenous fluid line at any desired
location and provides temperature measurements to a monitor device
to display the measured fluid temperature to an operator.
[0080] Having described preferred embodiments of a new and improved
temperature sensing device for selectively measuring temperature at
desired locations along an intravenous fluid line, it is believed
that other modifications, variations and changes will be suggested
to those skilled in the art in view of the teachings set forth
herein. It is therefore to be understood that all such variations,
modifications and changes are believed to fall within the scope of
the present invention as defined by the appended claims.
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