U.S. patent number 3,834,372 [Application Number 05/323,272] was granted by the patent office on 1974-09-10 for disposable manifold with atmospheric vent.
Invention is credited to Stephen Z. Turney.
United States Patent |
3,834,372 |
Turney |
September 10, 1974 |
DISPOSABLE MANIFOLD WITH ATMOSPHERIC VENT
Abstract
A manifold is formed with a plurality of ports for connection to
various components such as arterial-venous pressure generators, a
syringe, and a source of fluid and pressure sensitive transducers.
The manifold includes one or more rotary members which are
selectively positioned for interconnecting selected ones of the
components. Various sampling, flushing and pressure measuring
operations may be performed by use of the manifold. The manifold
further includes a venting port arrangement for venting the
pressure sensitive transducers to the atmosphere when a pressure
measurement is not being taken. This protects the transducer from
overpressurization and consequential damage.
Inventors: |
Turney; Stephen Z.
(Lutherville, MD) |
Family
ID: |
23258449 |
Appl.
No.: |
05/323,272 |
Filed: |
January 12, 1973 |
Current U.S.
Class: |
600/561; 251/310;
600/573; 137/625.47; 251/904; 604/248 |
Current CPC
Class: |
A61B
5/0215 (20130101); F16K 11/085 (20130101); Y10T
137/86871 (20150401); Y10S 251/904 (20130101) |
Current International
Class: |
A61B
5/0215 (20060101); F16K 11/02 (20060101); F16K
11/085 (20060101); A61b 005/02 (); A61m
001/00 () |
Field of
Search: |
;128/2.5D,2.5E,2F,2.5R,214R,221,274
;137/625.41,625.42,625.47,625.24,625.16,625.15,625.19
;251/181,309,310,184,297 ;73/388R,398,392.4,389 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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|
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560,788 |
|
Apr 1957 |
|
IT |
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1,116,997 |
|
Jun 1968 |
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GB |
|
Primary Examiner: Gaudet; Richard A.
Assistant Examiner: McGowan; J. C.
Attorney, Agent or Firm: Finch, Esq.; Walter G.
Claims
What is claimed is:
1. A protection manifold, which comprises, means having internal
passageways and associated external ports for connecting various
components thereto to permit the transfer therethrough of fluids
wherein at least some of said fluids are pressurized, means mounted
movable and partially within and relative to said connecting means
for controlling the selective connection of at least a pair of said
connecting-means passageways to connect the various components
connected to the external ports of the pair of passageways, and
means formed in said controlling means independently of said
connecting means for venting to the atmosphere a selected one of
said connecting-means passageways during a period when at least two
other passageways are selectively connected by said controlling
means to vent the component connected to the selected one of said
passageways.
2. A protection manifold as recited in claim 1, which further
comprises, means appearing partially and externally on each of said
connecting and controlling means for indicating the selective
positioning of said controlling means.
3. A protection manifold as recited in claim 1, wherein said
connecting means includes, a housing, at least one opening formed
in said housing, a plurality of hollow stems extending from said
housing and forming ports, and said ports forming a plurality of
passageways in said housing with at least one passageway extending
from said opening to an exterior face of said housing.
4. A protection manifold as recited in claim 1 wherein said
controlling means includes, a movable valve member positioned
within an opening of said connecting means, said member formed with
passageways in a selected pattern so that when said valve member is
selectively positioned selected passageways of said connecting
means are connected through the passageways of said member.
5. A protection manifold as recited in claim 4 wherein said venting
means includes, a selectively formed passageway in said movable
valve member which is aligned with a selected one of said ports for
the selective venting of the component connected thereto.
6. A protection manifold as recited in claim 2, wherein said
indicating means includes, pointer means formed with said movably
mounted controlling means, and labels placed selectively in fixed
locations on said connecting means adjacent to positions at which
said pointer is positionable.
7. A protection manifold as recited in claim 1, wherein said
connecting, controlling and venting means are formed of
plastic.
8. A protection manifold as recited in claim 4 wherein said movable
member is rotatable relative to said connecting means to effect the
selective positioning thereof.
9. A protection manifold as recited in claim 4, wherein said
movable member is slidable relative to said connecting means to
effect the selective positioning thereof.
10. A protection manifold as recited in claim 1, which further
comprises, means formed in said connecting means for securing the
manifold to an attaching structure.
11. A protection manifold as recited in claim 3 wherein each of
said stems are formed of a different geometry to indicate the
function of the component to be connected thereto.
12. A protection manifold as recited in claim 1 wherein said
connecting means includes, a housing, a central and two side
openings formed in one face thereof, a passageway extending between
said central opening and each of said side openings, and a pair of
ports communicating with each opening;
said controlling means includes, three movable valve members being
assembled within the three openings of said housing, and each of
said valve members being formed with passageways which selectively
connect the housing passageways and ports; and
said venting means includes a passageway formed in each of at least
two of the three valve members to selectively provide a venting
passageway for at least two of said ports and components connected
thereto.
13. A protection manifold as recited in claim 1 wherein said ports
are provided for connecting to a syringe, a pressure sensitive
transducer, a fluid source and selected areas of a patient, said
controlling means is selectively manipulatable relative to said
connecting means to selectively connect the syringe with the fluid
source or the patient areas for flushing and sampling operations,
and to selectively connect the patient areas to the transducer for
pressure measurement, and said venting means is connected
protectively to the transducer when the syringe is connected to the
fluid source or the patient.
14. A protection manifold as recited in claim 1, which further
comprises means physically connected to said controlling means for
operating and controlling means to selected positions.
Description
This invention relates to protective manifolds, and more
particularly to a manifold used with pressure sensitive transducers
in the measurement of a system under pressure and with related
sampling and flushing components.
There is a constant need for the measurement of pressure existing
within a system such as, for example, an arterial blood system of a
human being. This can be accomplished by connecting the pressure
system to a pressure sensitive transducer which develops a readable
measurement. In blood pressure measuring systems using this
principle, a manifold is frequently employed to permit the further
sampling of blood through the pressure line connected to the artery
of the patient and, further, to permit flushing of the pressure
line to insure removal of coagulated blood and other undesirable
substances.
In use of available manifolds for this multiple purpose, the
transducers are subjected to continuous pressurization during the
sampling and flushing operations. This could be caused by an
external flushing source which is constantly flushing a fluid
through the transducer as a necessity for operation of the
transducer. Or it could also be caused by having the sampling or
flushing lines turned into the transducer during periods when
sampling or flushing operations are in progress.
Regardless of the reason or manner in which the transducer is
continuously pressurized, overpressurization frequently occurs in
the transducer which is seriously damaged as a result thereof.
Needless to say the time and cost of repairing the damaged
transducer results in an expensive maintenance program and requires
additional inventory to insure the availability of working
transducers when needed. In many instances such damaged transducers
are irrepairable.
Thus, there is a need for a manifold which will permit selective
pressure measurement and further sampling and flushing operations
of a fluid-pressure system, such as the arterial blood system of a
human being, without overpressurizing the transducer at anytime
during the various operations.
The manifold usually includes some form of valving arrangement to
permit the conditioning of the manifold for the various sampling,
flushing and measurement operations. It is critically important,
especially in medical applications of the manifold, that some means
be used to provide external indication of the particular
positioning of the valve arrangement. This will insure safety in
the various operations.
Additionally, some means should be provided for insuring that the
various components be connected to proper ports of the manifold.
Otherwise improper connections between components can result with
potentially serious consequences.
As noted previously, in one medical application of such a system,
blood can be drawn from the patient in the sampling operation by
use of the pressure line and certain portions of the manifold.
Generally, this results in the collection of coagulated blood in
the pressure line and manifold and causes a reduction in pressure
during subsequent pressure-measuring operations.
In order to overcome this deficiency, there is a need for a
flushing system which permits selective flushing of the portions to
be cleaned without subjecting the pressure sensitive transducer to
any pressurized fluids during the flushing period.
It is an object of this invention, therefore, to provide a manifold
which will permit selective utilization of a pressure sensitive
transducer and sampling and flushing facilities without
overpressurization of the transducer.
Another object of this invention is to provide a manifold which is
sufficiently labeled to permit selective utilization thereof in
sampling, flushing and pressure measuring operations.
Still another object of this invention is to provide a manifold
which is labeled to insure the connecting of the external
facilities to selected ports for proper and desired sampling,
flushing and pressuremeasuring operations.
A further object of this invention is to provide a manifold which
will properly vent a pressure sensitive transducer during sampling
and flushing operations being conducted through the manifold
exclusive of the transducer.
Other objects and attendant advantages of this invention will
become more readily apparent and understood from the following
detailed specification and accompanying drawings in which:
FIG. 1 is a perspective view of a complete multiport manifold
assembly embodying certain principles of the invention;
FIG. 2 is a block diagram showing the manifold of FIG. 1 assembled
in a typical application;
FIG. 3 is a chart-schematic diagram showing five positions of a
rotary valve member of the manifold of FIG. 1 and the function
thereof at each position;
FIG. 4 is a plan view of three-valve, multiport manifold further
embodying certain principles of the invention;
FIG. 5 is a side view of the manifold of FIG. 4 with a section cut
away to show an overflow vent arrangement;
FIG. 6 is a schematic diagram showing the three-valve manifold of
FIGS. 4 and 5 and the various selectively available positions for
the valves;
FIG. 7 is a plan view of a sophisticated, singlevalve, multiport
manifold embodying still further principles of the invention;
FIG. 8 is a side view of the manifold of FIG. 7;
FIG. 9 is a sectional view taken along line 9--9 of FIG. 8 showing
details of the manifold of FIGS. 7 and 8; and
FIG. 10 is a chart-schematic diagram showing four positions of a
rotary valve member of the manifold of FIGS. 7, 8 and 9 and the
function thereof at each position.
Referring to FIG. 1, there is shown a protective manifold 10
composed of a plastic material and embodying certain principles of
the invention. The manifold 10 includes a control handle 12 which
controls the position of a rotary valve member formed integrally
with the handle. A handle-position-indicator dial 14 is located
adjacent to the handle 12 and cooperates with the handle, which
also functions as a pointer, to identify a number of selectable
handle positions. The rotary valve member is formed with an opening
16 at one end thereof which facilitates atmospheric venting of a
selected port of the manifold 10. Further, numbers on the dial 14
indicate functional positioning of the rotary valve member. A
plurality of stems are formed integrally with and extend radially
from a central, hollow-hub housing having an opening which contains
the rotary valve member. Two of the stems form a syringe port 18
and a transducer port 20.
As further illustrated in FIG. 2, additional stems form a saline or
flushing fluid port 22 and a pressure port 24. The manifold 10 is
arranged and connected so that a syringe 26 is connected to the
syringe port 18. A pressure-responsive transducer 28 is connected
to the port 20. The transducer 28 controls a bridge circuit and
amplifier 30 to provide a readable measurement of pressure being
analyzed. A saline source 32 which may be used for a flushing
fluid, is connected to the port 22 and a pressure generator 34 is
connected to the port 24. Feed lines 36, 38 and 40 are used to
facilitate the above-mentioned connections. Conductors 42 are used
to connect the transducer 28 to the bridge circuit and amplifier
30.
The illustrated syringe 26 is a typical type of hydraulic syringe.
However, other types of facilities could be used. For example, a
bag, capable of containing a fluid, could be connected to the port
18 and squeezed and manipulated by hand to provide the necessary
pressure reaction which is commonly accomplished by the syringe
26.
The transducer 28, as illustrated, is a dome type which has a
flushing fluid (not shown) being constantly flushed therethrough
from an external source (not shown) to prevent damping of a
pressure wave form being coupled to the transducer through the
manifold 10. However, other types of transducers could be utilized.
Or direct-reading, pressure-responsive devices such as
mercury-filled manometers can be used.
The pressure generator 34 is equivalent to arterial blood pressure
of a patient. The feed line 36 could be connected to a catheter, or
similar device, for direct insertion into various areas of a
patient to measure arterial, venous, cerebral, spinal fluid,
gastrointestinal tract and lung pressures.
In use, the handle 12 is manipulated to position the rotary valve
member within the hub housing so that channels formed internally of
the rotary valve member provide an open passageway between selected
ports within the manifold 10. This will permit, for example,
connecting of the pressure generator 34 with the transducer 28. The
generator 34 can be connected to the syringe 26 for withdrawal of
blood samples. The syringe 26 can be connected to the saline source
32 for the withdrawal of flushing fluid into the syringe for
subsequent injection of the fluid into the feed line 36 for
cleaning coagulated blood therefrom. An intravenously injectable
fluid can replace the saline source 32 and the rotary valve member
then positioned to permit direct infusion of the fluid through the
manifold 10 into the patient.
The stems of the ports 18, 20, 22 and 24 can be of different
structure or geometry to indicate which ports are to be connected
to the various components such as the syringe 26, transducer 28,
saline source 32 and generator 34, respectively. Further, the stems
could be color coded for the same purpose.
Referring to FIG. 3, the chart-schematic diagram is divided into
three columns and five rows. The first column illustrates the
position of the handle 12, and consequently the position of the
rotary valve member.
The second column shows the hydraulic circuit of the manifold 10,
including the position of the rotary valve member and its internal
passageway alignment. The third column shows the function of the
manifold 10 in the various positions of the rotary valve
member.
When the handle is in position 1, the passageway of the rotary
valve member of the manifold 10 connects the pressure generator 34
to the transducer 28 with the resultant function being to measure
the pressure. Notice that all remaining ports are closed by virtue
of the selective positioning of the rotary valve member.
In position 2 of the handle, the pressure generator 34 is connected
to the syringe 26. This permits the withdrawal of fluid, such as
blood, from the patient by withdrawing the plunger of the syringe
26. This provides patient specimens for analyzation. It should be
noted that blood will probably coagulate in the line 36 and
passageway of the rotary valve member. This could cause a loss of
pressure in later pressure-measuring operations.
After the syringe 26 containing the sampling of blood is removed,
another syringe can be connected to the port 18 and the handle 12
moved to position 3. This connects the syringe 26 with the saline
source 32 whereafter the saline solution can be withdrawn into the
syringe to perform the function of filling the syringe with
flushing fluid. The handle 12 is moved to position 2 where
manipulation of the syringe plunger injects the flushing fluid
through and cleans the passageway of the rotary member and thereby
removes the coagulated blood.
It is particularly significant to note that while the handle 12 is
in position 2, the transducer 28 is vented through the manifold 10
by the vent port 16 formed centrally in one end of the rotary valve
member. This venting, when flushing or sampling withdrawal
operations are occurring, protects the transducer 28 from
overpressurization and consequential damage. The pressure in the
transducer 28 is developed by the high pressure flushing of a fluid
through the dome of the transducer for the previously mentioned
damping purpose. The venting of the transducer 28 precludes the
build-up of pressure beyond an acceptable threshold within the
transducer and thereby prevents damage and irrepairable destruction
of the transducer.
When the handle is placed in position 4, the passageway of the
rotary valve member connects the pressure generator 34 and the
saline source 32 for direct fast flushing of the passageway and
feed line 36. Additionally, the saline source 32 could be replaced
by a fluid which is to be fed directly into the patient.
The handle 12 can be placed in position 5, for a full 180.degree.
position swing, to accomplish the same function as is accomplished
in position 1.
In another embodiment of the invention, a three-valve, multiport,
plastic manifold 44 is illustrated in FIG. 4. The manifold 44
includes three knobs 46, 48 and 50 which are integrally formed with
rotary valve members as illustrated by knob 50 and its related
valve member in FIG. 5. The knobs 46 and 50 are formed with vent
ports 52 and 54, respectively. A series of stems extend laterally
from opposite sides of a longitudinal housing of the manifold 44
and form ports 56, 58, 60, 62, 64 and 66.
The longitudinal housing of the manifold 44 is formed internally
with passageways which extend between and communicate with openings
formed in the housing. The openings receive and contain the rotary
valve members which are also formed internally with passageways
which are alignable with the passageways of the longitudinal
housing. Locking caps 68 (FIG. 5) are positioned over and locked on
the exposed bottom portions of the rotary valve members to secure
for rotation the knobs 46, 48 and 50 and related rotary valve
members with the longitudinal housing.
As further illustrated in FIG. 4, the knobs 46, 48 and 50 are
formed on the face thereof with position indicators or pointers 70,
72 and 74, respectively, and passageway indicators 76, 78 and 80,
respectively. The three valve assemblies which include the knobs
46, 48 and 50 are designated 82, 84 and 86 respectively.
The knob-visible face of the longitudinal housing are provided with
label points about the periphery of the knobs 46, 48 and 50 which
can be read in cooperation with the position indicators 70, 72 and
74 to indicate the functional positions of the particular valve
assemblies 82, 84 and 86. To further facilitate the determination
of functional positioning of the valve assemblies 82, 84 and 86,
each label point has a literal label placed adjacent thereto such
as "READ", "FLUSH", "FILL", "SAMPLE" or "ZERO." Although these
labels would appear in the face of the longitudinal housing, they
are illustrated away from the face for clarity purposes only.
The longitudinal housing is formed with spaced notches on opposite
sides of longitudinal edges thereof to facilitate the secure
mounting of the manifold 44 to an attaching structure. This keeps
the assemblies 82, 84 and 86 from being vibrated, or from altering
their positions due to vibrations, with reference pressure being
measured.
As illustrated in FIG. 6, the use of the manifold 44 permits the
assembly of two transducers and two pressure generating systems
(artery and vein) thereto. Also the assemblies 82 and 86 have a
90.degree. rotation limit while the assembly 84 is rotatable
through a full 360.degree..
As shown, the assemblies 82 and 84 are positioned to connect an
artery line to a syringe for flushing purposes while the assembly
86 is positioned to permit the measurement of venous pressure
through a transducer. It is noted that the transducer which is
connected to the port 56 is vented through the vent port 52 for
protective precluding of overpressurization as previously explained
while the flushing operation is in progress. By selective
positioning of the valve assemblies 82, 84 and 86, various
combinations of sampling, flushing and pressure measurement
operations can be conducted. In any case, the transducers will
always be vented when not being used for pressure measurement.
As illustrated in FIG. 7, a single valve multiport, plastic
manifold 88, embodying certain principles of the invention,
includes a knob 90 which is formed integrally with a rotary valve
member 112 (FIG. 9). The rotary valve member 112 is positioned
within a central opening of a manifold housing. Three stems form
ports 92, 94 and 96 and extend from a rear face of the manifold
housing. The ports 92, 94 and 96 are to be connected to a
transducer, a patient and a fluid source, respectively, as labeled
on the top face of the housing. Another stem forms a port 98 and
extends from a front face of the housing. The port 98 is to be
connected to a syringe as labeled on the top face of the housing.
Still another stem forms a port 100 and extends from a side face of
the housing and is normally open to the atmosphere to serve as a
vent as labeled on the top face of the housing.
The knob 90 is provided with a pointer 102 which cooperates with
four labeled points on the top face of the housing to indicate
whether the manifold 88 is in a "READ", "FILL", "FLUSH/SAMPLE" or
"IV" mode.
As illustrated in FIG. 9, each of the ports 92, 94, 96, 98 and 100
communicate with passageways formed internally of the housing which
extend to the central opening. The internal passageways of the
housing then selectively communicate with precisely formed
passageways 104 and 106 in the rotary valve member 112.
Referring to FIG. 7, openings 108 are formed in the housing of the
manifold 88 to facilitate securing of the manifold to an attaching
structure which could be a fixed frame or the patient.
As shown in FIG. 8, a locking cap 110 is secured over the lower
exposed end of the rotary valve member 112 to secure for rotation
the member to the housing.
It is also noted that the syringe port 98 extends from the front
face of the manifold 88 and thereby permits ready access to the
port for the only component, the syringe, which may be frequently
worked, or exchanged, during performance of the various operations
associated with other components attached to the manifold. The
remaining ports 92, 94, 96 and 100 are located on the rear or side
faces to avoid confusion and danger of introducing wrong substances
into the patient.
Referring to FIG. 10, the chart-schematic diagram is displayed in
the same column and row arrangement as the diagram of FIG. 3.
When the pointer 102 is on the "READ" position, the rotary valve
member 112 is positioned so that the transducer and patient are
connected so that the pressure being sensed can be read. As noted
previously this could be other pressure areas of the body other
than that associated with the blood.
With the pointer 102 on the "FILL" position, the syringe is
connected to the fluid source to permit the withdrawal of fluid
into the syringe for subsequent flushing operation. It is important
to note that the transducer is vented during this "FILL"
operation.
As the pointer 102 is placed on the "FLUSH/SAMPLE" position, the
syringe and the patient are connected to permit a line and manifold
flushing operation or a blood or other patient substance sampling
operation. It is further noted that the transducer continues to be
vented during the "FLUSH/SAMPLE" operation.
The pointer 102 can also be moved to the "IV" position, which
stands for intravenous position, wherein the fluid source is
connected to the patient. If the fluid is a flushing fluid, it can
be fed directly and quickly to the manifold 88 and the associated
patient line for flushing foreign substances such as coagulated
blood. It could also be used to infuse continuously intravenously
various solutions used in the treatment of patients. Again, the
transducer is vented during the "IV" operation.
Thus the transducer is vented for protection against
overpressurization during each operation in which the transducer is
not being used when the manifold 88 is utilized.
Further, the vent port 100 can be used to fill the dome of the
transducer with fluid for damping purposes, which has been
previously mentioned. This can be accomplished at any position
except the "READ" position by connecting a syringe to the vent port
100 and injecting fluid from the syringe into the dome.
The stems of the manifolds 44 and 88 could also be formed of
different structure or geometry, or be color coded, to identify the
functional purpose thereof rather than have the labels on the face
of the respective housings.
It is also possible to control the movement of the various rotary
valve members of the various embodiments of manifolds 10, 44 and 88
by use of an external controlling device (not shown). For example,
the rotary valve member can be physically connected to an
electrical control system which automatically rotates the valve
member in response to electrical signals. The electrical control
system could be operated selectively by a program or by a
sequential timing circuit. Further, the valve member could be a
sliding member rather than rotary. Or it could be both sliding and
rotary and thereby movable to different levels of port-connecting
facilities to expand the capabilities of the manifold.
The valve member could be formed of a structure which is controlled
by an external device (not shown) to alter the arrangement of the
internal passageways by a variety of means such as by rotation or
sliding movement. For example, the valve member could include a
pair of elements rotatable relative to each other with a combined
internal passageway configuration when two elements are in one
relation and another configuration when the elements are rotated
relative to each other to a second relation. The two elements of
the valve member would be rotated together when used in the
manifold for the functions previously described and rotated
relative to each other when it is desired to change the particular
passageway relation for use in additional functions with the
manifold. The same principle could be accomplished if the pair of
elements were slidable, rather than rotatable, relative to each
other.
The manifolds 10, 44 and 88 are sufficiently small, lightweight and
inexpensive so that they may be presterilized and packaged in a
protective, sealed wrapping until they are to be assembled with the
various components for use. After use, they may be discarded or
easily dismantled for cleaning, resterilization and reuse. Removal
of the locking cap, such as caps 68 and 110, permit
dismantling.
While the particularly described embodiments of manifolds 10, 44
and 88 have referred to applications in the medical field, the use
of these manifolds can be widespread. For example, manifolds of
this type can be used wherever there is a need to measure pressures
and transfer liquids or gases. This could be in experimental
endeavors or in an actual manufacturing environment. It is to be
further understood that the use of the term fluid herein refers to
liquid as well as gas.
Obviously, many modifications and variations of the present
invention are possible in light of the above teachings. It is,
therefore, to be understood that within the scope of the appended
claims the invention may be practiced otherwise than as
specifically described.
* * * * *