Surgery – Instruments – Internal pressure applicator
Patent
1990-02-26
1992-07-14
Hafer, Robert A.
Surgery
Instruments
Internal pressure applicator
604 96, 604 54, 128898, A61B 1700
Patent
active
051299151
DESCRIPTION:
BRIEF SUMMARY
Already known are intragastric balloons which, placed in the stomach of an obese person, diminish the capacity of the stomach, which has the effect of diminishing the appetite and, consequently, causes an appreciable loss of weight, this loss of weight being moreover increasable if, parallel to the treatment by intragastric balloon, the person follows a diet. However, the placement of said intragastric balloons in the person's stomach is not unproblematic. Indeed, this placement necessitates an outpatient operation, or even a one-day hospitalization, and in addition, local anesthesia of the throat is necessary at the time of introduction of the balloon; the balloon must then be inflated with the aid of compressed air, for example, so as to obtain the desired volume. The withdrawal of the balloon after a few weeks or a few months likewise necessitates an outpatient operation; in addition, regular checks, carried out by a doctor, are called for. This treatment is therefore not only exacting but is costly as well.
Another proposal has been made of a balloon inflating under the effect of a chemical reaction causing the emanation of a non-toxic gas; the components necessary for the chemical reaction are brought in contact just before the balloon is swallowed, or else the reaction is started by the action of the liquids situated in the stomach or else the components are isolated by sugar or similar material, dissolving under the action of water.
According to another proposal, the balloon is filled in the deflated state with a liquid having a low melting point turning into gas under the effect of human body temperature.
These various proposals generally have the drawback of not having control over the moment of inflation of the balloon, this inflating then occurring too soon, before the balloon is in the stomach, this being able to bring about all sorts of trouble for the person under treatment. On the other hand, the prior art mentions the use of a balloon, even of two or three simultaneously in the stomach; the use of balloons of relatively large dimensions may lead to serious drawbacks, even to intestinal occlusions.
SUMMARY OF THE INVENTION
The object of the present invention is to provide an intragastric balloon inflating without outside means within the stomach, and which, being of small size, can easily be eliminated by the natural routes when it has been deflated, and which, being present simultaneously in a large number, permits a certain volume to be occupied in a person's stomach, and which remedies the above drawbacks.
To this end, the balloon is made up of an envelope which is at least approximately fluid-tight, enclosing at least one substance or a composition which permits an inflation of the envelope within the person's stomach to be caused automatically and without bringing in outside energy, characterized in that this inflation derives from a chemical reaction made possible by the melting of the coating of one of the constituents.
BRIEF DESCRIPTION OF DRAWINGS
Other characteristics of the invention will follow from the detailed description of the subject of the invention, referring to the appended drawing in which
FIG. 1 is an elevation of an embodiment of the balloon in its deflated state,
FIG. 2 is an elevation of an embodiment of the balloon during the chemical reaction causing the inflation of the envelope to form the balloon,
FIG. 3 is a perspective view of an embodiment of the balloon in its inflated state.
FIG. 1 shows the main elements of an embodiment of the subject of the invention, viz.: example, order to form a gas, at a temperature lower than that of the human body.
DESCRIPTION OF PREFERRED EMBODIMENTS
In this figure, the chemical reaction not being able to take place, the balloon is deflated and can, in view of its small size, easily be swallowed with the aid of a little water, for example.
In one embodiment of the invention, the envelope 1 may be produced of flexible synthetic material such as polyethylene, polypropylene, PVC, PVCD, PET, Teflon, or any other appropriate t
REFERENCES:
patent: 4485805 (1984-12-01), Foster, Jr.
patent: 4694827 (1987-09-01), Weiner et al.
patent: 4925446 (1990-05-01), Garay et al.
Hafer Robert A.
Owens Kerry
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