U.S. patent number 3,905,361 [Application Number 05/463,585] was granted by the patent office on 1975-09-16 for apparatus for sealing the esophagus and providing artificial respiration and evacuating the stomach.
This patent grant is currently assigned to Brunswick Mfg. Co., Inc.. Invention is credited to John R. Hewson, Roy H. Hewson.
United States Patent |
3,905,361 |
Hewson , et al. |
September 16, 1975 |
**Please see images for:
( Certificate of Correction ) ** |
Apparatus for sealing the esophagus and providing artificial
respiration and evacuating the stomach
Abstract
Apparatus for use in artificial respiration and stomach
evacuation comprising an elongated member and ventilation mask. The
elongated member which is designed to be inserted into the
esophagus and stomach has an expandable inflatable element which
can be operated externally after insertion in order to close the
esophagus to prevent inflation of the stomach or aspiration of the
contents of the stomach into the respiratory system. The
ventilation mask, which fits over the mouth and nose provides a
seal against the patient's face when it is held in place. A
ventilation opening in the mask allows air or oxygen to be directed
through the mouth into the lungs for artificial respiration. The
apparatus preferably includes a tubular fluid passageway in the
elongated member with evacuation openings beyond the inflatable
element to allow the contents of the stomach to be aspirated
through the passageway and externally of the mask. Fluid can also
be introduced into the stomach through the passageway.
Inventors: |
Hewson; John R. (Norwell,
MA), Hewson; Roy H. (Carver, MA) |
Assignee: |
Brunswick Mfg. Co., Inc. (North
Quincy, MA)
|
Family
ID: |
23840603 |
Appl.
No.: |
05/463,585 |
Filed: |
April 24, 1974 |
Current U.S.
Class: |
128/202.16;
128/207.15; 604/97.02; 128/202.28 |
Current CPC
Class: |
A61M
16/0415 (20140204); A61M 16/0463 (20130101); A61M
16/0434 (20130101); A61M 16/06 (20130101); A61M
16/0484 (20140204); A61M 16/0493 (20140204); A61M
1/84 (20210501); A61M 16/0488 (20130101); A61M
2210/1053 (20130101) |
Current International
Class: |
A61M
16/06 (20060101); A61M 16/04 (20060101); A61M
1/00 (20060101); A61M 016/00 () |
Field of
Search: |
;128/145.5,145.6,145.7,142.4,276,277,278,351,188,349B,349BV,DIG.26 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Gaudet; Richard A.
Assistant Examiner: Recla; Henry J.
Attorney, Agent or Firm: Wolf, Greenfield & Sacks
Claims
What is claimed is:
1. Apparatus for medicinal purposes comprising
an elongated solid, tubular member constructed and arranged to be
inserted into the esophagus and having outer and inner ends,
an expandable element carried by the member in the vicinity of its
inner end,
means for causing the element to expand so as to form an effective
seal isolating the stomach from the lungs of a patient,
a face mask including a cup-shaped section having a collar means
about the periphery thereof for providing a seal with the face of a
patient;
said elongated tubular member extending through said cup-shaped
section in the vicinity of its outer end,
and an opening through said cup-shaped section defining a
ventilating passageway passing to the inside of the mask for
introducing ventilating gas therein which may pass through the nose
and/or mouth and trachea to the patient's lungs.
2. Apparatus as defined in claim 1 in which the elongated member
has a port adjacent to the outer end of the member and a port
located adjacent to the inner end and contains a duct which
provides fluid communication between the ports.
3. Apparatus as defined in claim 1, in which the expandable element
comprises an inflatable cuff.
4. Apparatus as defined in claim 3 further characterized by a
channel in the elongated member and connected to the cuff and
through which the cuff may be inflated.
5. Apparatus as claimed in claim 1 in which the outer end of the
elongated member is connected to a sleeve in turn removably mounted
in and extending through the mask.
6. Apparatus as defined in claim 1 in which an inflatable collar is
secured to the edge of the mask to form a seal between the mask and
the patient's face.
7. Apparatus as claimed in claim 1 further characterized by a
ventilation tube in communication with the opening in said mask for
providing mouth to mask ventilation.
8. Apparatus for medical purposes comprising,
an elongated member constructed and arranged to be inserted into
the esophagus and having outer and inner ends,
an expandable element carried by the member in the vicinity of its
inner end,
means for causing the element to expand so as to form an effective
seal isolating the stomach from the lungs of a patient,
a face mask connected to the elongated member in the vicinity of
its outer end with said face mask having means for forming a seal
with the face of a patient,
an opening through the mask to the inside thereof for introducing
ventilating gas therein which may pass through the nose and/or
mouth and trachea to the patient's lungs,
said elongated member being tubular with a port adjacent to the
outer end of the member and a port located adjacent to the inner
end and containing a duct which provides fluid communication
between the ports,
a second opening in the mask through which the tubular member
extends, and said port adjacent the outer end of the tubular member
lying outside said mask.
9. Apparatus as defined in claim 8 further characterized by a
ventilation tube in communication with the opening in said mask for
providing mouth to mask ventilation, said tube being open to the
inside of the mask.
10. Apparatus as defined in claim 2 further characterized by said
duct being an integral part of the tubular member.
11. Apparatus as defined in claim 2 further characterized by said
duct being a separate member that extends out the ports and has
openings in its inner end for communicating with the interior of
the stomach.
Description
INTRODUCTION
U.S. Pat. No. 3,683,909 dated Aug. 15, 1972 issued in the name of
DonMichael et al describes the importance of the technique of
"mouth-to-mouth" resuscitation performed either by a party exhaling
directly into the mouth of the person to be revived or by the
exhalation of air into an airway inserted into the mouth of the
patient. This invention is a modification of the invention of that
patent, and provides means for ventilating the patient's lungs and
evacuating the stomach.
Unlike the apparatus of the DonMichael et al patent supra, in the
present invention ventilation is provided by introducing air or
oxygen into a mask that covers the nose and mouth and forms a seal
against the face, from which it flows directly into the lungs
without the aid of a duct or other special passage. A duct which
extends into the esophagus from the mask does not carry the
ventilating gas but rather serves to seal the stomach from the gas
and prevent the stomach contents from backing up into the
respiratory system. In the preferred form of this invention, the
duct may also be used to evacuate the stomach and convey the
contents to a point beyond the face mask, without interfering with
ventilating procedure.
BRIEF FIGURE DESCRIPTION
FIG. 1 is a side view, partly in section, of a device constructed
in accordance with this invention and suggesting its use in place
in the esophagus;
FIG. 2 is a fragmentary view of a modification of this invention;
and
FIG. 3 is a cross sectional view taken along section line 3--3 of
FIG. 1.
DETAILED DESCRIPTION OF INVENTION
The apparatus illustrated in FIG. 1 contains a main tube 1, formed
of a synthetic plastic material having some rigidity, but also a
degree of flexibility. The tube is somewhat curved to ease its
insertion through the mouth of the patient, over the tongue and
into the esophagus and stomach. Guide tip 2 provided on the inner
or leading end closes that end of the tube, and has a rounded blunt
nose that eases the insertion of the tube into the patient. Near
the inner end of the tube the wall of the tube is formed with a
number of apertures 3 spaced along its length and around its
peripheral wall. When the apparatus is in place, these apertures
are disposed inside the stomach and provide ports through which the
contents of the stomach can enter the tube 1. (This is suggested in
FIG. 1 wherein the apertures 3 are shown disposed in the stomach
S.)
A sleeve 4 fits tightly within and extends beyond the other outer
end of tube 1 and is made of a hard synthetic plastic material such
as polypropelene. The sleeve 4 inter alia serves as a bite tube
which prevents the tube 1 from being collapsed by the patient's
teeth when the tube extends through the mouth.
Above apertures 3 in tube 1 and around the outside of the tube is
an inflatable cuff 5 which is sealed at both ends to the outer
surface 6 of the tube. The cuff is in effect an expandable,
resilient, tubular wall formed of a synthetic rubber or like
material. A small bore channel 6 is formed in the wall of the tube
1 and extends from the inflatable cuff and within the wall of the
tube toward its outer end and emerges from tube 1 at point 8 and is
continued as a separate tube 7. The other end of tube 7 is
connected to an inflatable pressure indicator 9 in turn connected
to a connecting piece 10 which carries a valve 11. The valve in
turn is connected to a pump member 12 in the form of a syringe.
The pump comprises a hollow cylinder 13 having a tubular stem 14
that connects to the valve 11 and a piston 15 controlled through a
finger actuator 16 to which the piston is attached. Insertion of
stem 14 opens valve 11 and permits air to be forced from the pump
through duct 6 into the inflatable cuff 5. The pressure indicator 9
expands as the inflatable cuff expands, and its deflation warns the
operator of the deflation of the cuff and that the entrance E of
the esophagus is open to the stomach. Disconnecting the pump from
the valve may automatically close the valve and preserve the air
pressure in the cuff. The valve 11 may also be removed from the
fitting 11' at the end of connecting piece 10, and plug 10' may be
used to close the fitting.
A ventilation mask 20, which is designed to fit over the nose and
mouth of the patient comprises a cup-shaped section 21 formed of a
synthetic clear plastic material such as poly carbonate and a
detachable inflatable collar 22 that typically may be formed of a
synthetic rubber or like material. The cup-shaped section 21 of the
mark contains a circular opening into which sleeve 4 can be
inserted. The opening is provided with grommet 24 which maintains a
tight seal about the sleeve when the sleeve is inserted.
The cup section of the mask also carries a duct 31 that may be
integral with or otherwise permanently fixed to the mask and
through which air can be introduced for ventilating the lungs. The
duct 31 is of course open to the inside of the mask for this
purpose. The rubber collar 22 of the mask assembly is a small inner
tube-like structure. It fits tightly on and around the plastic cup
section of the mask and can be inflated through tube 32 connected
to a metal coupling 33. The inflatable collar provides a seal with
the face of the patient when the mask is held in place against the
face without an undue force being applied.
When using the apparatus the main tube 1 is inserted through the
patient's mouth into the esophagus and stomach with the inflatable
cuff 5 collapsed. With the tube inserted to a depth wherein the
cuff is near the end of the esophagus, pressure is then applied by
the pump to force air into the cuff to inflate it. In this manner
the patient's respiratory system is closed off from his stomach,
and the evacuation openings 3 in the tube 1 will be inside the
stomach. The sleeve 4 on the end of the tube may be inserted into
the mask opening either before or after the tube is inserted into
the patient. The rubber collar 22 of the mask 20 will also be
inflated to form a seal about the cup of the mask on the face. With
the tube and mask in place the lungs may be ventilated through tube
31 either from the mouth of an attendant or with some standard
equipment. The air introduced through the mask by means of tube 31
passes into the lungs via the patient's mouth and/or nose and
trachea as in normal breathing. Inflated cuff 5 prevents the
ventilating air from entering the stomach as the entry E from the
esophagus is sealed.
The openings 3 in the tube enable the stomach to be evacuated
without any risk of the stomach contents entering the lungs. And
this may be done either independently of or simultaneously with the
lung ventilating function. In the preferred form the sleeve 4 is
removable from the mask so that the mask can be removed from the
patient's face without withdrawing tube 1 to enable an indotracheal
tube to be inserted or for aspiration.
In FIG. 2 a modification of this invention is shown wherein the
means for evacuating the stomach is in the form of a removable
inner duct 40 that extends from the sleeve 4 throughout the length
of tube 1' and out the closed end 2' of the tube. A self sealing
opening may be provided at end 2' to allow the duct to extend
through it and into the stomach. The inner end 41 of duct 40 would
be open as at 42 and have additional side ports 43 to receive the
stomach contents.
In this embodiment, the inflation cuff and mask are the same as
that in the embodiment of FIG. 1, and they are not here shown in
detail.
From the foregoing description those skilled in the art will
appreciate that modifications may be made of this invention without
departing from its spirit. For example, while in each of the
embodiments shown means are provided for evacuating the stomach or
introducing fluids into the stomach without interfering with lung
ventilation, it will be understood that the means may be omitted if
the device is to be used only for lung ventilation. In that case,
the inflated cuff will prevent regurgitation and gastric
distention.
Because modifications may be made of this invention without
departing from its spirit, we do not intend to limit the scope of
this invention to the two embodiments illustrated and described.
Rather, the scope of this invention is to be determined by the
appended claims and their equivalents .
* * * * *