U.S. patent number 3,552,394 [Application Number 04/841,348] was granted by the patent office on 1971-01-05 for one-piece multiple hypodermic syringe arrangement.
Invention is credited to Ferrell S. Horn.
United States Patent |
3,552,394 |
Horn |
January 5, 1971 |
ONE-PIECE MULTIPLE HYPODERMIC SYRINGE ARRANGEMENT
Abstract
A dual hypodermic syringe device utilizing a pair of laterally
spaced barrels with an interconnecting portion occupying the space
between the barrels. The interconnecting portion extends for a
substantial portion of the length of the barrels. The barrels are
disposed in essentially parallel relationship, and a needle is
associated with each barrel. The barrels and interconnecting
portion are made from a common piece of material, and in each
barrel a movable plunger is disposed. The spacing of the needles is
less than 68 mm. such that an injection may be given to a patient
that involves only a single sensation of pain.
Inventors: |
Horn; Ferrell S. (Auburn,
AL) |
Family
ID: |
24161922 |
Appl.
No.: |
04/841,348 |
Filed: |
July 14, 1969 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
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541995 |
Apr 12, 1966 |
3467096 |
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Current U.S.
Class: |
604/173; D24/114;
604/191 |
Current CPC
Class: |
A61M
5/19 (20130101); A61M 5/46 (20130101); A61M
5/3298 (20130101); A61M 5/3291 (20130101); A61M
5/3286 (20130101) |
Current International
Class: |
A61M
5/19 (20060101); A61M 5/46 (20060101); A61m
005/22 (); A61m 005/32 () |
Field of
Search: |
;128/214,214.4,215,216,218,218.1,218.2,218R,221,218A |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Koren; Samuel
Assistant Examiner: Czerwonky; James H.
Parent Case Text
RELATIONSHIP TO PRIOR INVENTION
This invention is a division of my earlier patent application
entitled "Multiple Hypodermic Syringe Arrangement," filed Apr. 12,
1966, Ser. No. 541,995, now U.S. Pat. No. 3,467,096.
Claims
I claim:
1. A dual hypodermic syringe device comprising a pair of laterally
spaced barrels with an interconnecting portion occupying the space
between said barrels and extending for a substantial portion of the
length of the barrels, said barrels adapted to contain fluid said
barrels and said interconnecting portion constructed from a single
piece of material, an independent plunger provided in each of said
barrels, said barrels having means thereon upon which a pair of
needles can be operatively disposed in essentially parallel, spaced
relationship and extend in the same direction, said barrels forming
an integral unit and being spaced apart a distance such that the
needles, when in the operative position, are spaced apart less than
68 mm., whereby an injection can be given to a patient involving
only a single sensation of pain.
2. The dual hypodermic syringe arrangement as defined in claim 1 in
which said needles are approximately of the same length.
3. The dual hypodermic syringe arrangement as defined in claim 2 in
which said needles are of different styles, such that one needle
injects into a deeper layer of flesh than the other.
4. The dual hypodermic syringe arrangement as defined in claim 1 in
which said needles are of different lengths, thus enabling
injections to be made to different depths in a patient.
Description
BACKGROUND OF THIS INVENTION
1. Field of the Invention
This invention can be categorized with multiple syringe
arrangements, some hand operated and some motor driven, which are
concerned with the injection (or removal of) more than one fluid or
increment of fluid at a time.
2. Description of the Prior Art
The pertinent prior art is believed to principally involve
apparatus concerned with the injection or removal of fluid from a
human being or animal, and certain biological or industrial
apparatus, such as that applicable to the curing of meat, or the
delivery of microvolumes of fluid over an extended period of
time.
SUMMARY OF THE INVENTION
The present invention is based upon the same unique characteristics
defined in my earlier invention, involving a pair of needles
disposed in essentially parallel relationship and operatively
connected to respective laterally spaced, interconnected barrels
equipped with independently movable plungers, with the spacing of
the needles being sufficiently close that a double injection may be
given to a person or animal while involving only a single sensation
of pain. The present invention may be distinguished from the parent
case by virtue of the fact that the two barrels and interconnecting
portion are here made from a common piece of material, thus
amounting to a low-cost device which can be used quite effectively
for multiplicity of purposes, yet be produced very
economically.
As is well known, hypodermic syringes are in wide use in all parts
of the world, being used for the injection of many different types
of drugs and medications, as well as for the extraction on occasion
of body fluids, such as in injured areas. The needle size utilized
in a given instance depends for example upon the age and condition
of the patient, and the type liquid to be injected, or the sample
of body fluid to be removed. Typically, a comparatively short
needle is used if the patient is to receive a subcutaneous
injection, whereas a considerably longer needle is usually involved
if the patient is to receive an intramuscular injection.
Many patients have an innate dread of receiving injections and the
situation involved in such instances is always compounded if the
patient is to receive two different drugs that are not compatible
if mixed prior to injection, or if one drug is to be injected
subcutaneously and the other intramuscularly. In instances of this
general type, it has been at all uncommon for a patient to receive
injections in say both arms, and almost invariably in such
instances the patient is made more uncomfortable than if only a
single infection were in order.
In accordance with this invention, I provide a novel, double-needle
syringe configuration enabling the nurse or doctor to give two or
more injections contemporaneously, with only a single injection
ordeal on the part of the patient, and a single sensation of pain
being involved.
This invention is grounded on the phenomena known as the two-point
threshold of pain or pressure, which may be defined as the distance
at which the surface pain sensors of the human body cannot
distinguish between single and multiple locations of pain. This is
to say, depending at the location on the body, a person cannot
ascertain if he or she is receiving one needle or a plurality of
needles if these needles are disposed comparatively close together.
Although the tongue can distinguish between one sharp point and two
sharp points unless the two points are approximately 1 mm. apart,
in some parts of the back, thigh, and upper arm, the two-point
threshold of pain often involves a distance of 68 mm. (EXPERIMENTAL
PSYCHOLOGY by Woolworth & Schlosberg; Henry Holt & Co.,
N.Y.). By taking cognizance of the pressure and pain receptor
characteristics of the planned injection area, with the use of my
invention the nurse or doctor can, when the circumstances warrant,
give two or possibly more injections to a patient in one
application.
My invention is not limited to any one particular configuration of
hypodermic syringe, for by sizing the needles in a desired manner,
the injection of two different types of drugs is enabled, such as
one drug that needs to be injected subdurally or subcutaneously
while the other drug is injected intramuscularly. This latter
circumstance of course obtains when the two drugs being injected
are not compatible with each other and are to be injected into the
flesh separately yet concurrently at two different locations
depthwise.
This particular invention involves a low-cost syringe device, which
may or may not be comparable to the single-use syringes currently
on the market, which syringe may be made from one piece of plastic
and arranged to receive two closely disposed needles and separate
plunger arrangements.
It is therefore an object of my invention to make possible a
low-cost, multiple injection technique enabling injections to be
given with minimum anguish being involved on the part of the
patient and minimum time required on the part of the nurse or
doctor.
It is another object of my invention to provide a novel one-piece
fixture by the use of which a medically trained person can inject
the needles of two syringes simultaneously into an injection area
of the body, yet cause the recipient only a single sensation of
pain.
It is another object of my invention to provide a multiple syringe
fixture with which various needle arrangements may be used, such
that injections at two different depths may be simultaneously
made.
My invention may also have great value in instances in which large
amounts of fluid or drugs are required to be administered, for by
the use of my invention, a massive dose may be divided into two
smaller doses that can be dispersed into a comparatively large area
of tissue, thus reducing the possibility of the formation of
abscesses which tend to form as a result of an overconcentration of
fluids in one area.
These and other objects, features and advantages will be more
apparent from a study of the appended drawings in which:
FIG. 1 is a perspective view of my novel one-piece syringe device
as it is grasped in a preferred manner preparatory to injecting
fluids into a patient;
FIG. 2 is a cross-sectional view illustrating in a simplified
manner and to a larger scale how the needles of a pair of needles
can be sized to penetrate to varying skin levels in the
patient;
FIG. 3 is a perspective view to a larger scale than FIG. 1 of the
low-cost, one-piece embodiment of my dual hypodermic syringe
device, with one of the plungers removed in the interests of
clarity; and
FIG. 4 is a cross-sectional view to the same approximate scale as
FIG. 2 and showing how by the use of two different types of needles
of approximately the same length, two different drugs can be
administered at different levels in the body although the depthwise
penetration of the two needles is essentially identical.
DETAILED DESCRIPTION
Referring to FIG. 1, it is there revealed how my novel one-piece
dual hypodermic syringe is grasped at the time of injection, with
it being obvious that the needles 33 and 34 thereof are disposed in
essentially parallel relationship. It is optional whether I use
needles of two different lengths such as needles 33 and 34, or
alternatively whether needles of essentially the same lengths, such
as needles 43 and 44 of FIG. 4 are employed with my device.
Separate fluid containing barrels 45, 46 (See FIG. 3) are utilized
in connection with each of the needles, although in accordance with
the present, both syringe bodies are formed from a common piece 40
of plastic or glass. The bodies thereafter are drilled to form
barrel portions that receive the plungers 41 and 42.
As previously indicated, the ends of the syringes opposite the
plungers are configured to receive a pair of needles, which needles
are not movable with respect to each other as was possible in
accordance with my earlier cited invention. It is important to note
that while the spacings between the needles may vary from syringe
to syringe manufactured in accordance with this invention, in no
instance is the spacing between needles greater than 68 mm. This is
to say, I am concerned with providing dual syringes such that when
used properly, only a single sensation of pain results, and in
almost all instances, the spacing between needles must be 68 mm. or
less.
When the needles are sized as shown in FIG. 2 to penetrate to
different depths in the flesh, the flat portions of the needles may
be oppositely oriented so that the drugs being administered will
flow in generally opposite directions in the tissues of the
patient.
FIG. 4 reveals how the pair of needles may be of essentially the
same length, but a different style construction. As will be
apparent, the hole of needle 43 is located a substantial distance
above the point or tip of the needle, and thus this needle is
designed to inject fluid into a less deep layer of flesh, whereas
needle 44 is designed to inject into a deeper layer.
FIG. 3 reveals other details of my low-cost, one-piece embodiment,
such as for example the use of an interconnecting reinforcing
portion 47 molded or otherwise formed between the barrels 45, 46,
and also the use of calibrations on the barrels such that a
carefully measured dose of drug can be administered by the nurse or
doctor utilizing same.
* * * * *