Device for executing thermal ablation in intestinal tract

Abstract

The utility model discloses a device for executing thermal ablation in intestinal tracts, and relates to the technical field of medical instruments.The device comprises a sheathing canal, a bag body, a water injection pipe and a heating wire, the bag body is arranged on the outer wall of the sheathing canal, and a sealing end plate is arranged at the end, located on the bag body, of the sheathing canal; the sealing end plate is provided with a guide pipe connected to the outside of the capsule body and a water through hole communicated with the capsule body. The water injection pipe is arranged in the sheathing pipe in a penetrating mode and can move front and back, a liquid changing valve is arranged at the end, located on the bag body, of the water injection pipe, a needle tube penetrating through the guiding pipe is arranged at the end, away from the water injection pipe, of the liquid changing valve, a needle head is arranged on the needle tube, and the water injection pipe moves front and back so that the liquid changing valve can be switched to discharge liquid from the water through hole or the needle tube. Meanwhile, the needle head can extend out of or retract into the guide tube; and the heating wire is wound on the outer wall of the sheath tube in the bag body. The thermal ablation effect on intestinal mucosa can be achieved, protection water is injected between the mucosa layer and the muscle layer through the needle body, and damage to the muscle layer is prevented.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a device for performing thermal ablation in the intestine. Background Art

[0002] Studies have found that by applying thermal ablation to the intestinal mucosa at a safe temperature, the activity of the intestinal mucosa is reduced, which helps reduce the intestinal mucosa's absorption of fat, thereby achieving a weight loss effect for obese patients.

[0003] However, when applying thermal ablation to the intestinal mucosa, the temperature may accidentally exceed the safe range and cause irreversible damage to the intestinal muscle layer. However, there is currently a lack of devices that can thermally ablate the intestinal mucosa while avoiding accidental damage to the intestinal muscle layer. Utility Model Content

[0004] The main purpose of this application is to provide a device for performing thermal ablation in the intestine, aiming to solve the technical problem in the prior art of the lack of a device that can thermally ablate the intestinal mucosa while avoiding accidental damage to the intestinal muscle layer.

[0005] The technical solutions adopted in this application are as follows:

[0006] A device for performing thermal ablation in an intestinal tract, comprising:

[0007] sheath;

[0008] A sac body, the sac body being arranged on the distal outer wall of the sheath tube, the sheath tube being provided with a sealing end plate at one end thereof, a guide tube connected to the outside of the sac body being centrally arranged on the sealing end plate, and water holes being arranged around the guide tube and communicating with the sac body;

[0009] A water injection tube, the water injection tube is arranged in the sheath tube and can move back and forth along the sheath tube, a liquid exchange valve is provided at one end of the water injection tube located in the sac body, a needle tube is provided at one end of the liquid exchange valve away from the water injection tube, the needle tube is arranged in the guide tube, and a needle is provided on the needle tube, the back and forth movement of the water injection tube can switch the liquid exchange valve to discharge liquid from the water hole or from the needle tube, and at the same time enable the needle to extend or retract into the guide tube; and,

[0010] A heating wire is coiled on the outer wall of the sheath tube located in the capsule.

[0011] Optionally, the liquid exchange valve includes:

[0012] a valve housing, wherein a valve cavity is provided in the valve housing, a liquid guide tube connected to the needle tube is provided in the valve cavity, a pressure relief valve is provided in the liquid guide tube, a first liquid inlet and a second liquid inlet are provided at one end of the valve housing away from the needle tube, the first liquid inlet leads to the valve cavity, the second liquid inlet leads to the liquid guide tube, and a liquid outlet is provided at one end of the valve housing located at the needle tube, the liquid outlet leads to the sheath tube;

[0013] The baffle is fixed to the inner side of the sealing end plate through a support rod, and the baffle is provided with a sealing plug for sealing the liquid outlet.

[0014] Optionally, the liquid guiding tube has a liquid guiding channel with a variable diameter, wherein the side of the liquid guiding channel close to the second liquid inlet is a small-pore channel, and the side away from the second liquid inlet is a large-pore channel.

[0015] Optionally, the pressure relief valve includes:

[0016] A valve core, the valve core comprising a T-shaped core body consisting of a large diameter section and a small diameter section, the outer diameter of the small diameter section being adapted to the inner diameter of the small-pore channel, and the outer diameter of the large diameter section being smaller than the inner diameter of the large-pore channel;

[0017] A spring is sleeved on the small diameter section, and two ends of the spring are respectively fixed to the end face of the large diameter section and the connecting end faces of the small hole channel and the large hole channel, and the spring maintains the tendency of the valve core to seal the small hole channel.

[0018] Optionally, the valve housing is provided with a conical plug located at the second liquid inlet and inserted into the liquid guide tube.

[0019] Optionally, the proximal end of the sheath is provided with a first end joint and a second end joint, the first end joint is used to lead out the water injection pipe, and the second end joint is used to lead out a wire connected to the heating wire.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] The embodiment of the present application proposes a device for performing thermal ablation in the intestine. After entering the intestine through a sheath and an endoscope, the water injection tube is moved forward to extend the needle body out of the guide tube. Then, under endoscopic operation, the needle body is inserted between the intestinal mucosal layer and the muscle layer to inject a protective liquid (water). This can avoid irreversible damage to the muscle layer caused by thermal ablation. At the same time, the water injection tube moves backward to inject water into the bladder. Under the action of the electric heating wire, the water is heated to form a thermal ablation effect on the intestinal mucosa, thereby reducing the activity of the intestinal mucosa and helping obese patients to lose weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1A schematic structural diagram of a device for performing thermal ablation in the intestine provided in an embodiment of the present application at one viewing angle;

[0023] Figure 2 is a cross-sectional view of the capsule;

[0024] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 for Figure 3 Enlarged view of point B in the middle.

[0026] Description of the reference numerals in the accompanying drawings:

[0027] 1-sheath, 101-sealing end plate, 2-bladder, 3-water injection pipe, 4-water hole, 5-reversing valve, 51-valve housing, 52-liquid guide tube, 520-small hole channel, 521-large hole channel, 53-first liquid inlet, 54-second liquid inlet, 55-pressure relief valve, 550-valve core, 551-spring, 552-step, 56-conical plug, 57-baffle, 58-sealing plug, 59-valve chamber, 6-guide tube, 7-needle tube, 8-needle, 9-heating wire, 10-first end connector, 11-second end connector, 12-water injection device, 13-wire. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0029] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0032] Refer to the attached Figures 1 to 4 As shown, an embodiment of the present application provides a device for performing thermal ablation in the intestine, comprising a sheath 1, a bladder 2, a water injection tube 3, and a heating wire 9. The bladder 2 is disposed on the distal outer wall of the sheath 1. The bladder 2 and the sheath 1 are integrally formed. The interior of the bladder 2 can be filled with liquid (e.g., water) so that the bladder 2 can expand and adhere to the intestinal mucosal layer. A sealing end plate 101 is provided at one end of the bladder 2. A guide tube 6 connected to the outside of the bladder 2 is provided at the center of the sealing end plate 101. The guide tube 6, the sealing end plate 101, and the bladder 2 are all integrally formed. The sealing end plate 101 is also provided with a plurality of water holes 4 arranged in a circumferential array centered around the guide tube 6, which are connected to the interior of the bladder 2. A heating wire 9 is coiled on the outer wall of the portion of the sheath 1 located within the bladder 2. The heating wire 9 can heat the liquid within the bladder 2, raising the water temperature to a preset temperature, thereby achieving thermal ablation of the intestinal mucosal layer.

[0033] In this embodiment, the water injection tube 3 is disposed within the sheath 1 and is capable of being moved forward and backward along the axial direction of the sheath 1 via a water injection device 12 connected to the rear end of the water injection tube 3. A reversing valve 5 is provided at one end of the water injection tube 3 located within the bladder 2. A needle tube 7 is provided at the end of the liquid exchange valve away from the water injection tube 3. The needle tube 7 is disposed within the guide tube 6 and is equipped with a needle 8. When the water injection tube 3 is moved forward and backward along the axial direction of the sheath 1, the needle 8 can be extended and retracted into the guide tube 6.

[0034] See above Figures 2 to 4 As shown, the reversing valve 5 includes a valve housing 51 and a baffle 57. A valve cavity 59 is provided in the valve housing 51, a liquid guide tube 52 communicating with the needle tube 7 is provided inside the valve cavity 59, and a pressure relief valve 55 is provided in the liquid guide tube 52.

[0035] The valve housing 51, located at one end of the water injection pipe 3, is equipped with a first liquid inlet 53 and a second liquid inlet 54. The first liquid inlet 53 leads to the valve chamber 59, and the second liquid inlet 54 leads to the liquid guide pipe 52. The valve housing 51 is also equipped with a liquid outlet at one end of the needle tube 7, which leads to the sheath 1. A baffle 57 is fixed to the inside of the sealing end plate 101 via a support rod. The baffle 57 is equipped with a sealing plug 58 that seals the liquid outlet.

[0036] It can be imagined that when the water injection pipe 3 moves forward along the axis of the sheath 1, the reversing valve 5 moves forward together, and the needle tube 7 moves forward along the guide tube, and the needle body is pushed out and penetrates between the intestinal mucosa layer and the muscle layer. The sealing end plate 101 is in contact with the baffle 57 on one side. At this time, the liquid outlet is sealed by the sealing plug 58. When the water injection device 12 fills the water injection pipe 3, the liquid outlet is blocked, and the water pressure in the valve cavity 59 and the water injection pipe 3 increases, so that the pressure relief valve 55 opens to relieve pressure. At this time, water enters the needle tube 7 through the guide tube 52, and enters the needle body from the needle tube 7 to inject water between the intestinal mucosa layer and the muscle layer. After the protective water is injected between the intestinal mucosa layer and the muscle layer, the water injection pipe 3 moves backward along the axis of the sheath 1, the reversing valve 5 moves backward together, and the needle tube 7 moves backward along the guide tube, and the needle body withdraws from the intestinal mucosa layer and retreats into the guide tube. The reversing valve 5 moves backward and disengages from the baffle 57, the sealing plug 58 is separated from the liquid outlet, and the pressure relief valve 55 is reset and closed. At this time, when the water injection device 12 adds water to the water injection pipe 3, the liquid enters the sheath 1 through the liquid outlet, and enters the capsule 2 through the water hole 4 at the end of the sheath 1, causing the capsule 2 to expand and fit the intestinal mucosal layer. At this time, the liquid in the capsule 2 can be heated to a preset temperature by the heating wire 9, thereby achieving the purpose of thermal ablation of the intestinal mucosal layer.

[0037] As an example, see Figure 1 As shown, the distal end of the sheath 1 is provided with a first end fitting 10 and a second end fitting 11. The water injection tube 3 extends from the first end fitting 10 along the rear of the sheath 1 and connects to a water injection device 12. A wire 13 for connecting the heater filament 9 extends from the interior of the sheath 1 through the second end fitting 11 to connect to an external temperature control device and the electrical components required for heating. It should be noted that the water injection device 12 is conventional and can be, but is not limited to, a syringe. The temperature control device is also conventional and can be model OHR-E310A-55.

[0038] See above Figure 3 and Figure 4As shown, the liquid guide tube 52 has a liquid guide channel with a variable diameter. The side of the liquid guide channel close to the second liquid inlet 54 is a small-pore channel 520, and the side away from the second liquid inlet 54 is a large-pore channel 521. The connection between the large-pore channel 521 and the small-pore channel 520 forms a convex shoulder end face. The pressure relief valve 55 includes a valve core 550 and a spring 551. The valve core 550 is made of an elastic material, which can be rubber. The valve core 550 includes a T-shaped core body consisting of a large-diameter section and a small-diameter section. The outer diameter of the small-diameter section is adapted to the inner diameter of the small-pore channel 520, and the outer diameter of the large-diameter section is smaller than the inner diameter of the large-pore channel 521. In the natural state, the small-diameter section of the valve core 550 is sealed in the small-pore channel 520, and the large-diameter section is located in the large-pore channel 521. The spring 551 is sleeved on the small-diameter section, and its two ends are respectively fixed to the end surface of the large-diameter section and the end surface of the convex shoulder where the small-hole channel 520 and the large-hole channel 521 meet. The spring 551 maintains the tendency for the valve core 550 to seal the small-hole channel 520. It is not difficult to imagine that when water pressure enters the liquid guide tube 52 from the second liquid inlet 54, the water pressure increases, squeezing the valve core 550 inward, stretching the spring 551, and the valve core 550 retreats into the large-hole channel 521. Liquid then flows into the needle tube 7 along the gap between the valve core 550 and the large-hole channel 521. When the water injection tube 3 moves backward, the liquid enters the sheath 1 from the liquid outlet, the water pressure in the liquid guide tube 52 decreases, and the spring 551 rebounds, sealing the liquid guide tube 52.

[0039] In a preferred embodiment, in order to facilitate the connection between the second liquid inlet 54 and the liquid guide tube 52, see Figure 3 and Figure 4 As shown, the valve housing 51 is provided with a conical plug 56 that is pushed into the liquid guide tube 52 at the second liquid inlet 54. The conical plug 56 is the same as the liquid guide tube 52, and the conical plug matches the liquid guide tube 52. At the same time, at least two steps 552 are arranged at intervals on the outer end surface of the small diameter section. The conical plug 56 rests on the steps 552, so that a liquid outlet space is reserved between the conical plug 56 and the valve core 550, so that the liquid can smoothly enter the liquid guide tube 52.

[0040] In summary, the embodiment of the present application provides a device for performing thermal ablation in the intestine, and its usage method or working principle is as follows:

[0041] First, sheath 1 is inserted into the intestine along with the endoscope. Once the desired position is reached, the distal end of sheath 1 is adjusted by changing the angle of the endoscope, so that the distal end of guide tube 6 is in contact with the intestinal mucosa. Next, the water injection tube 3 is operated to move forward along the axial direction of sheath 1. The reversing valve 5 simultaneously moves forward, aligning the liquid outlet with the sealing plug 58 and driving the needle tube 7 and the needle body forward. The needle body extends out of the guide tube 6 and penetrates between the intestinal mucosa and muscle layers. Water is then injected into the water injection tube 3 via the water injection device 12. Because the liquid outlet is blocked by the sealing plug 58, as the water pressure within the water injection tube 3 and valve chamber 59 increases, the valve core 550 is pushed into the large-pore channel 521 of the liquid guide tube 52. Liquid enters the needle tube 7 through the gap between the valve core 550 and the large-pore channel 521. The liquid is then injected by the needle body into the space between the intestinal mucosa and muscle layers, forming a protective water barrier. It should be noted that the protective water barrier needs to be injected at multiple locations along the intestinal wall to protect the intestinal wall.

[0042] After the injection of protective water is completed, the water injection pipe 3 is operated to move backward. At this time, the reversing valve 5 moves backward synchronously, and the liquid outlet is separated from the sealing plug 58. At this time, the liquid enters the sheath 1 tube through the liquid outlet and enters the capsule 2 through the water hole 4 at the end of the sheath 1 tube. The pressure relief valve 55 reseals the liquid guide tube 52 under the action of the spring 551 due to the loss of pressure of the valve core 550. At this time, the water injection liquid will only enter the capsule 2. After the capsule 2 expands and fits the intestinal mucosa, the heating wire 9 can be turned on to heat to the preset temperature to perform thermal ablation on the intestinal mucosa.

[0043] It can be seen that the embodiment of the present application proposes a device for performing thermal ablation in the intestine. After entering the intestine through the sheath 1 through the endoscope, the water injection tube 3 is moved forward to extend the needle body out of the guide tube 6. Then, under endoscopic operation, the needle body is inserted between the intestinal mucosal layer and the muscle layer to inject protective liquid (water), which can avoid irreversible damage to the muscle layer under the action of thermal ablation. At the same time, the water injection tube 3 moves backward to inject water into the capsule 2. Under the action of the electric heating wire, the water is heated to form a thermal ablation effect on the intestinal mucosa, thereby reducing the activity of the intestinal mucosa and helping obese patients to lose weight.

[0044] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A device for performing thermal ablation in the intestine, characterized in that include: a sheath tube, wherein a proximal end of the sheath tube is provided with a first end connector and a second end connector; A sac body, the sac body being arranged on the distal outer wall of the sheath tube, the sheath tube being provided with a sealing end plate at one end thereof, a guide tube connected to the outside of the sac body being centrally arranged on the sealing end plate, and water holes being arranged around the guide tube and communicating with the sac body; A water injection tube, the water injection tube is passed through the sheath tube and led out from the first end joint, and can move back and forth along the sheath tube, a liquid exchange valve is provided at one end of the water injection tube located at the sac body, a needle tube is provided at one end of the liquid exchange valve away from the water injection tube, the needle tube is passed through the guide tube, and a needle is provided on the needle tube, the back and forth movement of the water injection tube can switch the liquid exchange valve to discharge liquid from the water hole or from the needle tube, and at the same time enable the needle to extend or retract into the guide tube; and, A heating wire is coiled on the outer wall of the sheath tube located in the capsule, and the second end connector is used to lead out a wire connected to the heating wire.

2. The device for performing thermal ablation in the intestine according to claim 1, characterized in that The liquid exchange valve comprises: a valve housing, wherein a valve cavity is provided in the valve housing, a liquid guide tube connected to the needle tube is provided in the valve cavity, a pressure relief valve is provided in the liquid guide tube, a first liquid inlet and a second liquid inlet are provided at one end of the valve housing away from the needle tube, the first liquid inlet leads to the valve cavity, the second liquid inlet leads to the liquid guide tube, and a liquid outlet is provided at one end of the valve housing located at the needle tube, the liquid outlet leads to the sheath tube; The baffle is fixed to the inner side of the sealing end plate through a support rod, and the baffle is provided with a sealing plug for sealing the liquid outlet.

3. The device for performing thermal ablation in the intestine according to claim 2, characterized in that The liquid guiding tube has a liquid guiding channel with a variable diameter. The side of the liquid guiding channel close to the second liquid inlet is a small-pore channel, and the side away from the second liquid inlet is a large-pore channel.

4. The device for performing thermal ablation in the intestine according to claim 3, characterized in that The pressure relief valve comprises: A valve core, the valve core comprising a T-shaped core body consisting of a large diameter section and a small diameter section, the outer diameter of the small diameter section being adapted to the inner diameter of the small-pore channel, and the outer diameter of the large diameter section being smaller than the inner diameter of the large-pore channel; A spring is sleeved on the small diameter section, and two ends of the spring are respectively fixed to the end face of the large diameter section and the connecting end faces of the small hole channel and the large hole channel, and the spring maintains the tendency of the valve core to seal the small hole channel.

5. The device for performing thermal ablation in the intestine according to claim 2, characterized in that The valve housing is provided with a conical plug at the second liquid inlet, which is pushed into the liquid guide tube.

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