JP7266505B2 - Gastric space filling device and method of operation thereof - Google Patents

Description

The present invention relates to a gastric space-filling device and method for degassing a space-filling material.

A technique for placing an elastic bag-like space filler in the stomach has been proposed (see, for example, Patent Document 1). In U.S. Pat. No. 5,400,002, the placed space filler is filled with an insufflation fluid, such as saline, by means of a catheter inserted into the stomach through the mouth or nose. By occupying space in the stomach and reducing the space available for food, space fillers can create a feeling of satiety and complete weight loss in obese individuals.

In U.S. Pat. No. 5,400,001, a needle is pierced to reduce the volume of the space filler and a suction device is used to remove it through the patient's esophagus. Therefore, the technique of Patent Document 1 has a problem that it is difficult to take out the space filler.

JP 2009-148578 A

SUMMARY OF THE DISCLOSURE An object of the present disclosure is to provide a gastric space-filling device that facilitates removal of the space-filling material.

A gastric space filling device according to the present disclosure comprises:
a space filler expandable in the gastric space;
a conductive line winding along the space-filling material;
a capacitor connected to the conductive line;
a resistance generator that generates resistance in the conductive line;
with
The conductive line and the capacitor form a resonant circuit,
A portion of the space filler is melted using the heat generated by the resistance generator.

The method for degassing a space filler according to the present disclosure includes:
A method of degassing an expandable space filler in a gastric space, comprising:
A conductive wire laps along the space-filling material,
A resonant circuit is configured by connecting the capacitor to the conductive line,
By irradiating radio waves that match the resonance frequency of the resonance circuit, heat is generated in a resistance generating portion provided in a portion of the conductive wire, and the heat is used to melt a portion of the space filler. .

According to the present disclosure, it is possible to provide a gastric space-filling device that facilitates removal of the space-filling material.

1 shows a configuration example of a gastric space filling device according to an embodiment. 1 shows an example of an A-A' cross section in FIG. 1 shows an example of a cross section taken along line B-B' in FIG. 1 shows an example configuration of a gastric space filling device before use. An enlarged view of a portion 13 of the conductive line 12 is shown.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Note that the present disclosure is not limited to the embodiments shown below. These implementation examples are merely illustrative, and the present disclosure can be implemented in various modified and improved forms based on the knowledge of those skilled in the art. In addition, in this specification and the drawings, constituent elements having the same reference numerals are the same as each other.

(Structure of gastric space filling device)
FIG. 1 shows a configuration example of a gastric space filling device according to an embodiment. The gastric space-filling device according to this embodiment includes a balloon 11 functioning as a space filler, a conductive wire 12, and a capacitor 14. As shown in FIG. Balloon 11 is an elastic closed bag that is expandable in the gastric space. Although the size and shape of the bag are arbitrary, an oval sphere of 450 ml to 500 ml can be exemplified. Moreover, the shape of the bag may be spherical, cylindrical, or ellipsoidal. Moreover, the shape of the balloon 11 is not limited to a single spherical shape, and may be bispherical.

The conductive wire 12 is arranged along the balloon 11 so as to go around the balloon 11 . In this embodiment, an example in which the conductive wire 12 makes four turns around the balloon 11 is shown, but the number of turns of the conductive wire 12 may be any number of one or more. Thereby, the conductive wire 12 functions as a coil. Capacitor 14 is connected to conductive line 12 and these connections form a series resonant circuit.

This embodiment detects the size of the balloon 11 by detecting the resonance frequency. Therefore, the conductive wire 12 is arranged at a position where the size of the balloon 11 can be detected. For example, when the shape of the balloon 11 is an elliptical sphere, it is arranged at the minor axis position.

FIG. 2 shows an example of an A-A' cross section in FIG. The balloon 11 has membranes 21I, 21M, 21S. Membrane 21I is arranged inside balloon 11 and membrane 21S is arranged outside balloon 11 . There may be a gap between the film 21I and the film 21M and between the film 21M and the film 21S, but they may be adhered.

Also, the films 21I, 21M, and 21S preferably have the same melting point, and are therefore preferably made of the same material. Also, the membranes 21I, 21M, 21S preferably contain polyethylene or polyvinylidene chloride. Saran (registered trademark), for example, can be used as polyvinylidene chloride. The thickness of the films 21I, 21M, and 21S is preferably about 0.02 mm.

Conductive lines 12-1 to 12-4 are printed on membrane 21M. The printed surface of the conductive lines 12-1 to 12-4 may be formed on any surface except the outer surface of the film 21S. For example, it may be formed on the inner surface of the membrane 21S. Also, the line width of the conductive line 12 may be uniform or may be different.

FIG. 3 shows an example of a cross section taken along line B-B' in FIG. Capacitor 14 comprises electrodes 14M and 14I. Electrode 14M is printed on membrane 21M and connected to conductive line 12-1 shown in FIG. Electrode 14I is printed on membrane 21I and connected using conductive line 16 to conductive line 12-4.

Since balloon 11 is placed in the stomach and is exposed to strong stomach acid, conductive wires 12 and 16 are preferably resistant to HCl, which is not soluble in stomach acid. For example, conductive lines 12 and 16 are preferably constructed of thin films of gold or platinum. Conductive lines 12 and 16 are also printed on the inside of membrane 21S to prevent contact between conductive lines 12 and gastric juices.

The structure shown in FIGS. 2 and 3, for example, prints electrode 14I and conductive line 16 on membrane 21I, overlies membrane 21M, prints electrode 14M and conductive line 12, and prints electrode 14M and conductive line 12 over membrane 21S. It can be configured by covering with

(Method for Arranging Gastric Space Filling Device in Gastric Space)
FIG. 4 shows an example configuration of the gastric space filling device before use. A gastric space-filling device according to the present disclosure is housed within capsule 31 in a collapsed state. The patient swallows the gastric space filling device. Capsule 31 passes through the patient's esophagus and dissolves in gastric juices upon reaching the stomach. When the capsule 31 dissolves, the balloon 11 is inflated by CO ₂ gas released from the outgassing product 32, dry ice. The balloon 11 inflated within the gastric space stays within the stomach. Note that the dry ice may be set to release CO ₂ gas after the capsule 31 is dissolved.

Outgassing 32 may be a combination of baking soda and acetic acid or hydrochloric acid. Baking soda and acetic acid or hydrochloric acid are separated by acid-dissolving gelatin, and when the gelatin is dissolved in acetic acid or hydrochloric acid, the baking soda and acetic acid or hydrochloric acid are mixed and _CO2 gas is released.

When the balloon 11 is inflated into a spherical shape and has a diameter of 5 cm or more, it can stay in the stomach, and the effect of filling the stomach space can be obtained. This corresponds to a volume of 65 ml. Preferably up to 10 cm in diameter. This corresponds to a volume of 520 ml. A diameter of 10 cm is effective in filling the gastric space of many people. A maximum allowable diameter is about 20 cm.

When the balloon 11 has a columnar or ellipsoidal shape, it can stay in the stomach if the maximum diameter is 5 cm or more. Preferably up to 10 cm in diameter. A maximum diameter of 20 cm is acceptable. The axial length is preferably 5 cm to 15 cm. A maximum axial length of 30 cm is acceptable. With such a size, the effect of staying in the stomach and filling the gastric space can be obtained. This allows the inflated balloon 11 to limit the patient's food intake by filling the gastric space.

(Intrastomach monitoring using resonant circuit)
The size of the balloon 11 changes with temperature (which changes with food and drinking water) and the pressure of food. When the size of the balloon 11 changes, the size of the coil formed by the conductive wire 12 changes and the resonance frequency changes. The amount eaten is monitored by the change in this resonance frequency.

For example, by irradiating radio waves from outside the patient's body while scanning the frequency, the resonance frequency corresponding to the size of the balloon 11 can be detected. Thereby, the size of the balloon 11 can be detected.

(Method for removing gastric space filling device from gastric space)
FIG. 5 shows an enlarged view of a portion 13 of the conductive line 12 shown in FIG. A resistance generator 15 that generates resistance is provided in a portion of the conductive line 12-4. The resistance generator 15 can employ any configuration that generates resistance. An example of a configuration that produces resistance is that the diameter of at least a portion of the conductive wire 12 is reduced, as shown in FIG. Alternatively, resistance may be generated by using a conductive material having a large resistance for the resistance generating section 15 .

When the gastric space filling device is continuously irradiated with the radio waves of the resonance frequency, the resistance generating part 15 generates heat, and the heat melts the balloon 11 and opens the hole. Thus, the gastric space filler device of the present disclosure can use a resonant circuit to perforate the balloon 11 .

The number of holes to be opened in the balloon 11 is 0.5. It may be several millimeters. Since the digestive system, including the esophagus, stomach and intestines, is peristaltic, 0. This is because if a hole of several millimeters is made, the balloon 11 will be compressed and degassed quickly. When the balloon 11 is made of saran, the resistance generating section 15 generates heat of 140° C. or higher. When the balloon 11 is made of polyvinylidene chloride, the resistance generator 15 generates heat of 110° C. or higher.

When the balloon 11 is inflated with dry ice, the dry ice placed inside the balloon 11 has already become a gas and is released from the holes. are not placed. Thus, the gastric space filling device of the present disclosure allows safe and easy removal of the balloon 11 . The balloon 11 can be removed through the patient's esophagus using a suction device.

The balloon according to the present disclosure allows the patient to simply swallow the capsule 31 when placing the balloon 11 in the stomach. However, the capsule 31 may lodge in the esophagus, or the capsule 31 may flow out of the stomach and enter the intestine. According to the present disclosure, a hole can be quickly made in the balloon 11 by irradiation of radio waves from outside the body. Therefore, the present disclosure prevents the balloon 11 from expanding in the esophagus and intestines, thereby preventing gastrointestinal perforation and intestinal obstruction caused by the balloon 11 .

The present disclosure can be applied to the medical device industry.

11: Balloons 12, 12-1, 12-2, 12-3, 12-4, 16: Conductive wire 14: Capacitor 15: Resistance generators 21I, 21M, 21S: Membrane 31: Capsule 32: Gas emission

Claims (4)

a space filler expandable in the gastric space;
a conductive line winding along the space-filling material;
a capacitor connected to the conductive line;
a resistance generator that generates resistance in the conductive line;
with
The conductive line and the capacitor form a resonant circuit,
a portion of the space filler is melted using the heat generated by the resistance generating unit;
Gastric space-filling device. At least a portion of the conductive wire in the resistance generating portion is thin,
2. The gastric space-filling device of claim 1. The space-filling material is formed of a three-layer film,
In the capacitor, one of the electrodes of the capacitor is arranged in a first film arranged in the middle of the three layers of films, and a second film is arranged in the innermost of the three layers of films . the other of the electrodes of the capacitor is disposed on the film of
the conductive line is wound along the space-filling material in the first film or the second film;
one end of the conductive wire is connected to one of the electrodes and the other end of the conductive wire is connected to the other of the electrodes;
3. A gastric space-filling device according to claim 1 or 2. A method of operating a gastric space filling device , comprising:
In the gastric space-filling device, a conductive wire circulates along an expandable space-filling material in the gastric space , and a capacitor is connected to the conductive wire to form a resonant circuit,
When the gastric space filling device is irradiated with radio waves that match the resonance frequency of the resonance circuit, the resistance generator provided in a portion of the conductive wire generates heat, and the heat is used to fill the space. Dissolving part of the material,
A method of operating a gastric space filling device.

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