U.S. patent number 3,766,920 [Application Number 05/164,660] was granted by the patent office on 1973-10-23 for enemata administering device.
This patent grant is currently assigned to E-Z-EM Company, Inc.. Invention is credited to Franklin R. Greene.
United States Patent |
3,766,920 |
Greene |
October 23, 1973 |
ENEMATA ADMINISTERING DEVICE
Abstract
A smooth, flexible enema tip having an inflatable balloon
mounted on the stem behind the exit port from the tip. A limited
volume, flexible, hand distendable air reservoir is connected to
the balloon-like retention ring so that operator compression of the
reservoir will inflate the ring. The reservoir is filled with a
resilient sponge so that the reservoir will snap back to its full
volume shape once operator pressure is removed and thus normally
deflate the ring. A soft, flexible, plastic annular retention pad
is mounted for axial movement along the enema stem which terminates
on the tip. This pad cooperates with the balloon to hold the
balloon in position.
Inventors: |
Greene; Franklin R. (Flushing,
NY) |
Assignee: |
E-Z-EM Company, Inc. (Westbury,
NY)
|
Family
ID: |
22595504 |
Appl.
No.: |
05/164,660 |
Filed: |
July 21, 1971 |
Current U.S.
Class: |
604/97.01;
604/912 |
Current CPC
Class: |
A61M
25/1002 (20130101); A61M 25/02 (20130101); A61M
31/00 (20130101); A61M 3/0295 (20130101); A61M
3/027 (20130101); A61M 2025/0266 (20130101) |
Current International
Class: |
A61M
25/02 (20060101); A61M 25/10 (20060101); A61M
3/00 (20060101); A61M 31/00 (20060101); A61M
3/02 (20060101); A61m 003/00 () |
Field of
Search: |
;128/246,247,349,145.7,278,276,344 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Gaudet; Richard A.
Assistant Examiner: Yasko; J.
Claims
What is claimed is:
1. A self-retaining rectal catheter for barium enemata
comprising;
a flexible plastic stem having an exit port,
a normally deflated inflatable annular retention balloon mounted
behind said exit port of said stem,
a rentention ring mounted for axial movement on said stem and
positioned behind said balloon,
an air reservoir,
a first conduit in communication with said retention balloon,
a second conduit in communication with said air reservoir,
a detachable coupling between said first and said second
conduits,
said air reservoir and said retention balloon comprising a closed
system when said coupling is made, said closed system having a
fixed and limited quantity of air therein,
said air reservoir being a readily compressible pourous resilient
sponge substantially filling said reservoir and having a normal
uncompressed state and a compressed state, said reservoir tending
to restore itself to said normal uncompressed state when compresive
pressure is removed from said reservoir,
said air reservoir when compressed forcing air into said retention
balloon, the quantity of air forced into said retention balloon by
the compression of said air reservoir being sufficient to inflate
said balloon,
said air reservoir in said uncompressed state providing sufficient
volume to accept a quantity of air from said balloon when said
balloon is in its inflated state to cause said balloon to collapse
to its normal deflated state,
the only source of air for inflating said balloon when said
coupling is made being the fixed quantity of air in said reservoir
when said reservoir is in its normal uncompressed state,
said coupling when detached freeing said first conduit for
connection to a source of air other than said reservoir, and
a manually actuable clamp on one of said conduits, said clamp
having a closed state and an open state, said clamp when in said
closed state shutting off communication between said balloon and
said reservoir to permit maintaining said balloon in an inflated
state after said balloon has been inflated by compression of said
reservoir,
said manually actuable clamp being the sole means of closing off
communication between said reservoir and said balloon,
said balloon having a single exit/entrance port and said reservoir
having a single entrance/exit port, both of said entrance/exit
ports being unobstructed during all states of inflation and
deflation of said balloon and during all states of expansion and
compression of said reservoir.
Description
This invention relates in general to a device for administering
enamata and more particularly to one that provides an improved
degree of safety for the patient together with convenience and
retention features.
BACKGROUND OF THE INVENTION
Although a variety of devices are known and have been proposed for
the administration of enemas and particularly for the
administration of a barium sulfate enema as part of radiological
examination, these devices ignore and perhaps even sacrifice the
comfort and safety of the patient to cost consideration or to
considerations of convenience for the doctor. For example, it is
known to provide an expandable annular balloon near the exit parts
of the tip of the enema administering device so as to retain the
device and the applied fluid in the patient; (see U.S. Pat. No.
3,459,175). However, this emphasis on effective retention risks
danger to the patient. Over inflation of the balloon retention
device can result in damage to the tissues and the wall against
which the retention device exerts pressure.
Accordingly, it is a major purpose of this invention to provide an
enemata administration device with improved patient safety built
into the device.
It is a further related purpose of this invention to provide an
enemata administration device that will provide as great a degree
of increased comfort for the patient as is possible.
It is a further purpose of this invention to provide this increased
safety and increased comfort in a device that includes convenience
features for the doctor and that is sufficiently simple and
inexpensive so that a disposal device is provided at a cost which
makes it feasible and likely that the improved safety and comfort
features will gain acceptance.
BRIEF DESCRIPTION OF THE INVENTION
In brief, this invention involves a smooth, flexible enema tip
having an inflatable balloon mounted on the stem behind the exit
port from the tip. A limited volume, flexible, hand distendable air
reservoir is connected to the balloon-like retention ring so that
operator compression of the reservoir will inflate the ring. The
reservoir is filled with a resilient sponge so that the reservoir
will snap back to its full volume shape once operator pressure is
removed and thus normally deflate the ring. A soft, flexible,
plastic annular retention pad is mounted for axial movement along
the enema stem which terminates on the tip. This pad cooperates
with the balloon to hold the balloon in position.
BRIEF DESCRIPTION OF THE DRAWINGS
The drawings, both of which are the same embodiment are:
FIG. 1 is a perspective view of an embodiment of this
invention.
FIG. 2 is a view in slightly larger scale than FIG. 1 of the
forward portion of the FIG. 1 device partially in perspective and
partially in cross-section and including a view in cross-section of
the air reservoir unit.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
As shown in the Figures, this invention is in an enemata structure.
The component parts incoude a smooth, flexible, plastic tubular
enema stem 12 having a tip portion 14 for insertion into a patient
and a series of concentric undulations 16 behind the tip 14. An
inflatable expandable thin-wall balloon-like torroidal retention
element 18 is affixed onto the stem 12 immediately behind the tip
portion 14. A flexible, limited volume air reservoir 20 is in
communication with the interior of this torroidal retention element
18 by way of a flexible tube 22. One end of the tube 22 is
connected to the reservoir stem 24 by being stretched over the
reservoir stem 24 and retained thereon by friction. This permits
the reservoir 20 to be disconnected from the tube 22 at the desire
of the doctor so that the doctor can control inflation of the
retention device 18 through some other air source. The doctor may
wish to do this in particular cases where, for example, he wishes
to increase the amount of inflation over the predetermined maximum
amount that is available with this enclosed limited volume
reservoir 20.
The air reservoir 20 is an enclosed space which can be compressed
by the user so that the air in the space is forced into the
retention device 18. Because the air reservoir 20 is an enclosed
volume, it limits the amount of expansion of the retention device
18. This limitation of the expansion of the retention device 18 is
very important from a safety point of view. Over inflation of these
retention devices 18 can damage the tissues of the patient, rupture
internal walls and, in rare cases, even result in killing a
patient. A resilient plastic sponge 25 substantially fills the
interior of the reservoir 20 so that when hand pressure of the
reservoir is released, the sponge 25 will spring back to its normal
shape and expand the walls of the reservoir 20. As a consequence,
the air in the retention device 18 will be drawn back into the
reservoir.
Thus, this reservoir 20 not only prevents over inflation of the
retention balloon 18, but also assures that the balloon 18 deflates
as soon as the doctor or his assistant releases his hold on the air
reservoir. A clip 26 is mounted on the reservoir stem 24 so that
the retention balloon 18 can be maintained in an inflated state
even after pressure on the air reservoir 20 is released. This
design means that the clip 26 purposely has to be moved after the
balloon 18 inflation, into the position where it pinches the stem
24 and holds the balloon 18 inflated. Thus the balloon 18 is kept
inflated only on purpose and after a chance is had to be warned of
excessive patient discomfort or other abnormal reaction.
A soft flexible plastic retention ring 28 is mounted for movement
along the stem 12. The retention ring 28 is a deformable plastic
disc-like device that fits on the troughs of the undulations 16 but
that can be forced over the ridges of the undulations 16 so that it
can be forced forward and back over the ridges. The purpose of the
retention ring is so that when the device is inserted into the
patient, the retention ring can be pushed forward against the
patient's anus to assure that the retention balloon 18 is properly
seated against the internal sphincter muscle. The retention ring 28
has a thin vinyl casing 28c containing an annulus of resilient
plastic foam 28f. The soft foam 28f is easily deformable so as to
provide a soft cushion for the patient. The vinyl casing 28c
stretches sufficiently so that the ring 28 can be manually forced
over the ridges of the undulations 16. Yet the vinyl casing resists
stretching sufficiently so that it can operate as part of the
retention arrangement without slipping back over the ridges.
Because the retention ring 28 is annular it cannot fall off or slip
off the stem 12.
A flexible tube 30 connected to the back end of the enema stem 12
permits connection to a reservoir (not shown), which reservoir may
contain, for example, a barium sulphate suspension. A clip 32 on
the flexible tube 30 permits a convenience of detaching the
flexible tube 30 from the reservoir after the fluid has been
administered to the patient so that the patient can be moved, or
can move himself, to a toilet for convenient elimination.
An airway or air tube 34 is a small flexible tube that passes
through an opening 36 in the stem 12 and then through the interior
of the stem 12 to the front opening of the tip 14. This airway 34
permits air to be administered by the doctor when desired and to
the extent necessary. A clip 38 on the airway permits closing off
the airway when necessary or desired. Because the airway 34 passes
through the interior of the tubular stem 12, there is no break in
the smooth surface of the stem 12 and the tip 14. This further
enhances patient comfort.
* * * * *