U.S. patent number 3,670,726 [Application Number 04/860,319] was granted by the patent office on 1972-06-20 for breathing circuit.
This patent grant is currently assigned to Becton, Dickinson and Company. Invention is credited to Samuel Cherba, Thomas J. Mahon.
United States Patent |
3,670,726 |
Mahon , et al. |
June 20, 1972 |
BREATHING CIRCUIT
Abstract
There is disclosed a breathing circuit which includes a
swivelled fitting for connection to a patient's face mask or
endotracheal tube and for connecting thereto breathing hoses which
are to be connected to an anesthetic machine or to a pulmonary
ventilator. The fitting is characterized in that the hoses are
laterally disposed with respect to the patient's nose. The circuit
in its entirety is further characterized in that it is light in
weight, is translucent and is designed for one-patient use to
render it disposable.
Inventors: |
Mahon; Thomas J. (Palisades
Park, NJ), Cherba; Samuel (Totowa, NJ) |
Assignee: |
Becton, Dickinson and Company
(East Rutherford, NJ)
|
Family
ID: |
25332943 |
Appl.
No.: |
04/860,319 |
Filed: |
September 23, 1969 |
Current U.S.
Class: |
128/204.18;
285/278; 128/909 |
Current CPC
Class: |
A61M
16/08 (20130101); A61M 16/0833 (20140204); A61M
16/0825 (20140204); Y10S 128/909 (20130101) |
Current International
Class: |
A61M
16/08 (20060101); A61m 017/00 () |
Field of
Search: |
;128/147,188,145.8,145A,208,201,195,205 ;285/272,273,278 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Gaudet; Richard A.
Assistant Examiner: Dunne; G. F.
Claims
What is claimed is:
1. An inert plastic resinous fitting for use in a breathing circuit
comprising a hollow substantially tubular body member having an
open cylindrical end and a closed end opposite said open end, said
member having first and second ports for connection of a hose
thereto and having an end opening in fluid flow communication with
said ports, said first mentioned opening being in a cylindrical
section of said body member, said ports being defined by
substantially parallel and side by side tubular sections extending
substantially normally outwardly from said body member, a tubular
member being a substantially right angle elbow and having a port at
said one end for connection to a patient's face mask or
endotracheal tube and having an opening at its other end in fluid
flow communication with said first mentioned opening, swivel means
for connecting said members at said openings said swivel means
including an annular recess in the outer surface of said
cylindrical section, and spaced apart inner and outer coaxial
circular wall sections at the opening of said elbows for receiving
said cylindrical section of said body member, said outer wall
having annular spaced apart bead means on its peripheral edge
extending into said recess so as to function as a ratchet, and said
swivel means being constructed and arranged to enable said body
member to be turned 360.degree. with respect to said elbow.
2. A fitting according to claim 1, constructed of a translucent
inert plastic resin.
3. A breathing circuit comprising the fitting of claim 1, a
flexible hose connected to each of said ports.
4. A breathing circuit according to claim 3, wherein said elbow,
said body member and said hoses are constructed of a translucent
inert plastic resin.
5. A breathing circuit according to claim 3, wherein said elbow,
said body member and said hoses are constructed of a carbonized
plastic resin which is electrically conductive.
Description
BACKGROUND OF THE INVENTION
FIELD OF THE INVENTION
The present invention relates to surgery and, more particularly, to
apparatus for use in connection with inhalation anesthesiology and
ventilation therapy.
Heretofore, breathing apparatus for use in connection with
inhalation anesthesiology and ventilation therapy were reused over
and over after sterilization thereof. Recently, it has been
established that in spite of sterilization the breathing apparatus
caused cross-infection due to contamination by gram-negative
organisms. Numerous attempts have been made to improve
sterilization techniques but without avail because of the inherent
condition of the atmosphere in hospitals and the like.
SUMMARY OF INVENTION
Accordingly, an object of the present invention is to provide a
breathing circuit of the foregoing described type which is so
economical that it is disposable.
Another object is to provide such a breathing circuit which is
extremely light in weight and is constructed so that it is more
comfortable to the patient.
Another object is to eliminate weight drag on tracheostomy
tubes.
Another object is to minimize the dangers of kinking or accidental
extubation of endotracheal tubes.
A further object is to provide such a breathing circuit which is
constructed of plastic resin and is fabricated under high
temperature conditions.
A still further object is to provide such a breathing circuit which
is translucent, thus allowing direct observation of excess or
purulent secretions and also of condensate level.
Other and further objects will be obvious upon an understanding of
the illustrative embodiment about to be described, or will be
indicated in the appended claims and various advantages not
referred to herein will occur to one skilled in the art upon
employment of the invention in practice.
In accordance with the present invention, the foregoing objects are
generally accomplished by providing a breathing circuit which
comprises a substantially right angle tubular elbow having a first
arm for connection to a patient's pulmonary system and having a
second arm, a hollow body member having a pair of side by side
ports and having an end opening, a flexible hose connected to each
of the ports, and swivel means connecting the second arm of the
elbow to the end opening of the body member so that the hoses are
laterally disposed with respect to the patient's nose.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a plan view of the breathing circuit in accordance with
the present invention.
FIG. 2 is a perspective view illustrating the breathing circuit
applied to a patient.
FIG. 3 is an elevational view of a swiveled fitting.
FIG. 4 is a plan view of the fitting shown in FIG. 3.
FIG. 5 is a sectional view taken along the line 5--5 on FIG. 4.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now to the drawing in detail, a breathing circuit is
shown in FIG. 1 which generally comprises a swiveled fitting 10,
and a pair of corrugated flexible hoses 11 and 12, each hose having
one end connected to the fitting 10 with the other end to be
connected to an anesthetic machine or to a pulmonary
ventilator.
The fitting and the hoses are constructed of a translucent inert
plastic resin preferably of polypropylene and polyethylene,
respectively. These parts by being translucent allow direct
observation of excess or purulent secretions and also of condensate
level. When the breathing circuit is used in connection with
ventilation therapy equipment, the plastic is non-conductive and,
therefore, translucent. When the circuit is used in connection with
inhalational anesthetic agents, the plastic is conductive of a
black color, in which translucency is lost. Preferably the
conductive plastic material comprises a carbonized plastic resin
which is electrically conductive, being of low and high density
polyethylene. However, in cases where there is positive assurance
that a flammable agent will not be used, the non-conductive circuit
may be used in connection with inhalational anesthesia.
The parts are fabricated at such high temperatures that following
manufacture they are sterile. During packaging they never become
wet and hence any contaminant growth is inhibited. Random sampling
of the packaged product has shown 100 percent sterility, that is,
negative for bacteria and fungi. However, even if there were
occasional contamination this would not be serious because the
greatest problem in ventilatory therapy is cross-infection with
hospital acquired organisms. Since the breathing circuit in
accordance with the present invention is relative inexpensive, it
is discarded after one-patient use and thus contributes enormously
to eradication of pulmonary cross-infection.
The fitting 10 (shown in FIGS. 3 to 5) comprises a hollow body
member 14 having a closed end 15 and an opening 16 defined by a
cylindrical section 17 at its opposite end and having side by side
tubular sections 18 and 19 extending outwardly to provide ports for
connecting the hoses 11 and 12; a tubular substantially right angle
elbow 20 having an arm 21 serving as a port for connection to a
patient's endotracheal tube 23 or face mask (not shown) or
tracheostomy tube (not shown), that is the patient's pulmonary
system, and having an arm 22; and swivel means 24 for connecting
the arm 22 to the cylindrical section 17 of the body member 14.
The swivel means 24 includes an annular recess 25 on the outer
surface of the cylindrical secton 17, and spaced apart inner and
outer coaxial circular wall sections 26 and 27, respectively, on
the arm 22 for receiving the section 17. The outer wall 27 has
annular bead means 28 on its peripheral edge extending into the
recess 25, functioning as a ratchet. The swivel means in this
manner is constructed and arranged to enable the body member 14 to
be turned 360.degree. with respect to the elbow 20 at desired fixed
positions.
In FIG. 2 the breathing circuit is shown as applied to a patient
with the arm 21 of the elbow 22 connected to an endotracheal tube
23 in situ. It will be observed, that by reason of the manner in
which the fitting 10 is constructed, the hose 11 and 12 are
laterally disposed with respect to the patient's nose. This,
coupled with the extreme light weight of the circuit, about 120
grams, reduces worry about accidental extubation and relieves
pressure on the nose and eyes, thereby avoiding such damage as
corneal abrasions.
SUMMATION
From the foregoing description it will be seen that the present
invention provides a highly improved and practical breathing
circuit both for inhalational anesthesia and ventilation.
* * * * *