A medical device for performing thermal ablation in the intestine

Abstract

The present application discloses a medical device for performing thermal ablation in the intestine, which relates to the technical field of medical devices, including a sheath, a capsule, a water injection pipe, a heating wire, an adjusting device, a water injection device and a heating control component, wherein the capsule is arranged on the outer wall of the sheath, and a sealing end plate is arranged at one end of the sheath located at the capsule, and a guide pipe connected to the outside of the capsule and a water hole communicating with the capsule are arranged on the sealing end plate; the water injection pipe is arranged in the sheath, and a reversing valve is arranged at one end of the water injection pipe, and the reversing valve is arranged with a needle tube arranged in the guide pipe, and a needle is arranged on the needle tube, and the water injection pipe is connected to the adjusting device to drive the water injection pipe to move forward and backward so that the reversing valve switches to discharge liquid from the water hole or from the needle tube, and at the same time, the needle enters and exits the guide pipe, and the heating wire is coiled on the outer wall of the sheath and is conductively connected to the heating component. The present application can realize thermal ablation of the intestinal mucosa, and inject protective water between the mucosa layer and the muscle layer through the needle to prevent damage to the muscle layer.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a medical 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 can be reduced, which helps reduce the absorption of fat by the intestinal mucosa, thereby achieving a weight loss effect for obese patients.

[0003] However, when thermal ablation is applied 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. Summary of the invention

[0004] The main purpose of the present application is to provide a medical device for performing thermal ablation in the intestine, aiming to solve the technical problem in the prior art of lacking a device that can perform thermal ablation on 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 medical device for performing thermal ablation in an intestinal tract, comprising:

[0007] A sheath tube, wherein a first end connector and a second end connector are disposed at the proximal end of the sheath tube;

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

[0009] A water injection pipe, the water injection pipe is inserted into the sheath tube and can move forward and backward along the sheath tube, a reversing valve is provided at one end of the water injection pipe located at the capsule, a needle tube is provided at one end of the reversing valve away from the water injection pipe, the needle tube is inserted into the guide tube, and a needle is provided on the needle tube, the forward and backward movement of the water injection pipe can switch the reversing valve to discharge liquid from the water hole or from the needle tube, and at the same time, the needle can be extended or retracted into the guide tube;

[0010] an adjusting device, the adjusting device is fixedly connected to the first end joint, the water injection pipe passes through the first end joint and is fixedly connected to the adjusting device, the adjusting device is used to realize the forward and backward movement of the water injection pipe in the sheath tube, and the adjusting device is axially arranged in the water injection channel communicated with the water injection pipe;

[0011] A water injection device, the water injection device is connected to the regulating device, and the water injection device injects water into the water injection pipe through the water injection channel;

[0012] a heating wire, the heating wire being coiled on the outer wall of the sheath tube located in the capsule; and,

[0013] A heating control component is conductively connected to the heating wire through a wire, and the wire enters and exits from the second end connector and is arranged along the sheath tube.

[0014] Optionally, the reversing valve includes:

[0015] A valve housing, wherein a valve cavity is disposed in the valve housing, a liquid guide tube connected to the needle tube is disposed in the valve cavity, a pressure relief valve is disposed in the liquid guide tube, a first liquid inlet and a second liquid inlet are disposed 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 disposed at one end of the valve housing located at the needle tube, the liquid outlet leads to the sheath tube;

[0016] 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.

[0017] 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 of the liquid guiding channel away from the second liquid inlet is a large-pore channel.

[0018] Optionally, the pressure relief valve comprises:

[0019] 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 is adapted to the inner diameter of the small hole channel, and the outer diameter of the large diameter section is smaller than the inner diameter of the large hole channel;

[0020] A spring is sleeved on the small diameter section, and two ends of the spring are respectively fixed to the end surface of the large diameter section and the connecting end surfaces 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.

[0021] Optionally, the valve housing is provided with a conical plug located at the second liquid inlet and is pushed into the liquid guiding tube.

[0022] Optionally, the adjusting device comprises:

[0023] A housing, the housing is fixedly connected to the first end joint, and a piston sleeve is clamped in the housing;

[0024] A handle is slidably arranged in the shell and passes through the piston sleeve, and the two are tightly connected. The handle is connected to the water injection pipe so that the water injection pipe can be driven to move forward and backward through the handle.

[0025] Optionally, the housing is axially provided with a channel hole for accommodating the handle, and a reset member for enabling the handle to slide along the second direction is provided in the channel hole.

[0026] Optionally, a guide groove extending along a first direction is provided on the hole wall of the channel hole, and the handle is integrally formed with a guide side protrusion extending to slide in the guide groove, and the guide side protrusion is provided with an elastic locking piece protruding toward the outside of the shell along a direction perpendicular to the first direction, and the shell is provided with a locking hole along a direction perpendicular to the first direction, and when the handle slides relative to the shell along the first direction, the elastic locking piece can extend into the locking hole to lock the handle.

[0027] Optionally, an elastic pressing piece is provided on the outer wall of the shell, and when the elastic pressing piece is pressed, the elastic locking piece can be pushed back into the shell to release the lock on the handle.

[0028] Optionally, the water injection device comprises:

[0029] A water injection cylinder, wherein a push screw is arranged inside the water injection cylinder, and a connecting pipe connected to the water injection channel is arranged at the front end of the water injection cylinder;

[0030] A pressure assembly, the pressure assembly comprising a sleeve integral with the water injection cylinder, the sleeve being provided with a passage hole for the push screw to extend out, the sleeve being provided with at least one pair of elastic pressure plates radially capable of approaching and moving away from the sleeve axis, the elastic pressure plate being provided with a thread matching the push screw on one side facing the sleeve axis; and,

[0031] A pressing assembly includes a pressing plate with one end hinged to the outer wall of the sleeve, a pressing head is integrally formed on the surface of the pressing plate facing the sleeve, and the pressing head abuts against the elastic pressure plate so that the other end of the pressing plate is tilted away from the outer wall of the sleeve.

[0032] Compared with the prior art, the beneficial effects of this application are:

[0033] The embodiment of the present application proposes a medical device for performing thermal ablation in the intestine. After entering the intestine through a sheath through an endoscope, the water injection tube is moved forward by operating the adjustment device to extend the needle out of the guide tube. Then, the needle is inserted between the intestinal mucosal layer and the muscle layer under the endoscopic field of view, and a protective liquid (water) is injected through the water injection device. This can avoid irreversible damage to the muscle layer caused by thermal ablation. At the same time, the water injection tube moves backward, and the needle tube is sealed so that water can be injected into the bladder through the sheath. Under the action of the heating control component, the electric heating wire heats up the water to increase the temperature of the water to form a thermal ablation effect on the intestinal mucosa, thereby reducing the activity of the intestinal mucosa and helping obese patients lose weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the structure of a medical device for performing thermal ablation in the intestine provided in an embodiment of the present application at one viewing angle;

[0035] Figure 2 is a cross-sectional view of the capsule;

[0036] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0037] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0038] Figure 5 It is a schematic diagram of the structure of the adjusting device at a viewing angle;

[0039] Figure 6 is a cross-sectional schematic diagram of the adjustment device at a viewing angle;

[0040] Figure 7 for Figure 6 Enlarged view of point A in the middle;

[0041] Figure 8 is a cross-sectional schematic diagram of the adjustment device at another viewing angle;

[0042] Fig. 9 It is a schematic diagram of the structure of the water injection device at one viewing angle;

[0043] Fig.10 A schematic diagram of the structure of the water injection device from another perspective

[0044] Fig.11 It is a partial cross-sectional schematic diagram of the water injection device at a viewing angle;

[0045] Fig.12 for Fig. 9 Enlarged view of point A in the middle;

[0046] Fig.13 It is a schematic diagram of the structure of the heating control component at one viewing angle;

[0047] Fig.14 It is a schematic diagram of the structure of the heating control component from another perspective;

[0048] Fig.15 It is a schematic diagram of the structure of the threaded pin at one viewing angle;

[0049] Fig.16 A schematic diagram of the structure of the cable clamp at one viewing angle.

[0050] Description of the reference numerals in the accompanying drawings:

[0051] 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 Catheter, 7-needle tube, 8-needle, 9-heating wire, 10-first end joint, 11-second end joint, 12-adjusting device, 1201-housing, 1202-handle, 1203-first convex shoulder ring groove, 1204-reset member, 1205-elastic locking member, 1206-elastic pressing member, 1207-water injection channel, 1208-guide groove, 1209-guide side convex, 13-guide wire, 14-water injection device , 1401-water injection cylinder, 1402-connecting pipe, 1403-injection screw, 1404-thread, 1405-handle, 1406-pressure assembly, 14061-sleeve, 14062-guide hole, 14063-limiting side groove, 14064-plate body, 14065-side plate, 14066-radial spring, 14067-guide column, 1407-pressing assembly, 14071-pressing block, 14 072-pressing boss, 1408-buckle, 1409-slot, 1410-electronic pressure gauge, 15-heating control assembly, 151-electrical box, 1511-box body, 1512-box cover, 152-mounting plate, 153-mounting hole, 154-electrical component, 155-threaded pin, 1551-V-shaped plug-in part, 156-cable clamp, 1561-base, 1562-cover, 157-heat dissipation hole. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0053] 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 components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0054] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] 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 used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. 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 the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0056] Refer to the attached Figure 1 As shown, the embodiment of the present application provides a medical device for performing thermal ablation in the intestine, including a sheath 1, a capsule 2, a water injection tube 3, a heating wire 9, an adjustment device 12, a water injection device 14, and a heating control component 15. The capsule 2 is arranged on the distal outer wall of the sheath 1, and the capsule 2 and the sheath 1 are an integrated structure. The interior of the capsule 2 can be filled with liquid (such as water), so that the capsule 2 can expand and fit the intestinal mucosal layer. Figure 2 and Figure 3As shown, a sealing end plate 101 is provided at one end of the sheath tube 1 located at the bladder body 2, and a guide tube 6 connected to the outside of the bladder body 2 is provided at the center of the sealing end plate 101. The guide tube 6, the sealing end plate 101 and the bladder body 2 are all integrated structures. The sealing end plate 101 is also provided with a plurality of water holes 4 connected to the inside of the bladder body 2 in a circumferential array with the guide tube 6 as the center. The portion of the sheath tube 1 located inside the bladder body 2 is wound with a heating wire 9 on the outer wall, and the heating wire 9 can be connected to the heating control component 15 through a wire 13. The heating wire 9 is energized by the heating control component 15, so that the heating wire 9 generates heat to heat the liquid in the bladder body 2, and the water temperature rises to a preset temperature, thereby achieving thermal ablation of the intestinal mucosal layer.

[0057] In this embodiment, the water injection tube 3 is inserted into the sheath tube 1, and can be moved forward and backward along the axial direction of the sheath tube 1 through the adjustment device 12 connected to the rear end of the sheath tube 1. A reversing valve 5 is provided at one end of the water injection tube 3 located at the capsule 2, and a needle tube 7 is provided at the end of the reversing valve 5 away from the water injection tube 3. The needle tube 7 is inserted into the guide tube 6, and a needle 8 is provided on the needle tube 7. When the water injection tube 3 moves forward and backward along the axial direction of the sheath tube 1, the needle 8 can extend and retract into the guide tube 6.

[0058] 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 connected to the needle tube 7 is provided inside the valve cavity 59, a pressure relief valve 55 is provided in the liquid guide tube 52, and a first liquid inlet 53 and a second liquid inlet 54 are provided at one end of the valve housing 51 located at the water injection tube 3, the first liquid inlet 53 leads to the valve cavity 59, and the second liquid inlet 54 leads to the liquid guide tube 52. A liquid outlet 511 is provided at one end of the valve housing 51 located at the needle tube 7, and the liquid outlet 511 leads to the sheath tube 1. The baffle 57 is fixed to the inner side of the sealing end plate 101 through a support rod, and the baffle 57 is provided with a sealing plug 58 that seals the liquid outlet 511.

[0059] It can be imagined that when the water injection pipe 3 is moved forward along the axial direction of the sheath tube 1 by the adjusting device 12, the reversing valve 5 is moved forward together, the needle tube 7 is moved forward along the guide tube 6, and the needle 8 is pushed out and pierces between the intestinal mucosal layer and the muscle layer, and one side of the valve shell 51 is in contact with the baffle 57. At this time, the liquid outlet 511 is sealed by the sealing plug 58. At this time, when the water is added to the water injection pipe 3 through the water injection device 14, the water pressure in the valve cavity 59 and the water injection pipe 3 increases due to the blocking of the liquid outlet 511, so that the pressure relief valve 55 is opened to relieve pressure. At this time, water enters the needle tube 7 through the guide tube 52, and enters the needle 8 from the needle tube 7 to inject water between the intestinal mucosal layer and the muscle layer. After the protective water is injected between the intestinal mucosal layer and the muscle layer, the water injection pipe 3 is moved backward along the axis of the sheath tube 1 by the adjusting device 12, the reversing valve 5 is moved backward together, the needle tube 7 is moved backward along the guide tube 6, and the needle 8 withdraws from the intestinal mucosal layer and retreats into the guide tube 6. The reversing valve 5 moves backward and disengages from the baffle 57, the sealing plug 58 is separated from the liquid outlet 511, and the pressure relief valve 55 is reset and closed. At this time, when the water injection device 14 fills the water injection pipe 3, the liquid enters the valve cavity 59 from the first liquid inlet 53, enters the sheath 1 through the liquid outlet 511, and enters the capsule 2 through the water hole 4 at the end of the sheath 1, so that the capsule 2 is expanded by water injection and fits the intestinal mucosal layer. At this time, the heating control component 15 is used to energize the heating wire 9, and the liquid in the capsule 2 can be heated to a preset temperature by the heat generated by the heating wire 9, thereby achieving the purpose of thermal ablation of the intestinal mucosal layer.

[0060] 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 hole channel 520, and the side away from the second liquid inlet 54 is a large hole channel 521. The large hole channel 521 and the small hole channel 520 form a convex shoulder end surface at the junction. The pressure relief valve 55 includes a valve core 550 and a spring 551. The valve core 550 is made of elastic material, which can be rubber. The valve core 550 includes a T-shaped core body composed 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 hole channel 520, and the outer diameter of the large diameter section is smaller than the inner diameter of the large hole channel 521. In the natural state, the small diameter section of the valve core 550 is sealed in the small hole channel 520, and the large diameter section is located in the large hole channel 521. The spring 551 is sleeved on the small diameter section, and the two ends of the spring 551 are respectively fixed to the end surface of the large diameter section and the convex shoulder end surfaces of the small hole channel 520 and the large hole channel 521. The spring 551 maintains the tendency of the valve core 550 to seal the small hole channel 520. It is not difficult to imagine that when the water pressure enters the liquid guide tube 52 from the second liquid inlet 54, as the water pressure increases, the valve core 550 is squeezed inward, the spring 551 is stretched, and the valve core 550 retreats into the large hole channel 521, and the liquid enters 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 tube 1 from the liquid outlet 511, the water pressure in the liquid guide tube 52 decreases, and the spring 551 rebounds to seal the liquid guide tube 52.

[0061] 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 which is pushed into the liquid guiding tube 52 at the second liquid inlet 54. The maximum outer diameter of the conical plug 56 is the same as the inner diameter of the liquid guiding tube 52, so that the conical plug 56 and the liquid guiding tube 52 can match each other. 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 abuts against 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 guiding tube 52.

[0062] In this embodiment, the distal end of the sheath tube 1 is respectively provided with a first end joint 10 and a second end joint 11, wherein an adjusting device 12 is connected to the first end joint 10, a water injection device 14 is connected to the adjusting device 12, and a wire 13 for connecting to the heating wire 9 extends from the second end joint 11 backward from the sheath tube 1 and is connected to the heating control component 15.

[0063] For details, see Figures 5 to 8As shown, the adjusting device 12 includes a housing 1201 and a handle 1202. The housing 1201 is fixedly connected to the first end connector 10, the housing 1201 is provided with a channel hole along the axial direction, the handle 1202 is placed in the channel hole and forms a sliding connection with the housing 1201, the water injection pipe 3 is connected to the handle 1202 by a thread 1404, the handle 1202 is provided with a water injection channel 1207 connected to the water injection pipe 3, and the water injection device 14 is connected to the water injection channel 1207, so that the water injection pipe 3 is driven to move forward and backward along the first direction by the forward and backward movement of the handle 1202, so that the needle 8 can enter and exit the guide tube 6, and the water injection operation is realized by the water injection device 14.

[0064] In an exemplary embodiment, in order to avoid continuously pressing the handle 1202 during the process of pushing the needle 8 out for injection, thereby saving effort, see Figure 3 As shown, a guide groove 1208 extending in a first direction is provided on the hole wall of the channel hole, and a guide side protrusion 1209 extending into the guide groove 1208 and slidingly formed on the handle 1202 is integrally formed, and an elastic locking member 1205 protruding toward the outer side of the housing 1201 is provided on the guide side protrusion 1209 perpendicularly to the first direction, and the housing 1201 is provided with a clamping hole perpendicularly to the first direction. When the handle 1202 slides relative to the housing 1201 along the first direction, the elastic locking member 1205 can extend into the clamping hole to lock the handle 1202, so that when water is injected between the intestinal mucosal layer and the muscle layer, the handle 1202 does not need to be continuously pressed, thereby achieving the purpose of labor saving. In this embodiment, the elastic locking member 1205 is a spring pin.

[0065] In the above, an elastic pressing member 1206 is provided on the outer wall of the housing 1201. The elastic pressing member 1206 includes a pressing plate and a pressing head. The pressing plate is fixed to the outer wall of the housing 1201. When the pressing plate is pressed downward, the pressing head pushes the elastic locking member 1205 back into the housing 1201 to unlock the handle 1202, so that the handle 1202 can be moved again. Of course, in this embodiment, in order to automatically move the handle 1202 backward to drive the water injection pipe 3 to move backward so that the needle 8 retreats into the guide tube 6 after the handle 1202 is unlocked, see Figure 7 As shown, a first boss groove 1203 is provided in the housing 1201, and the inner diameter of the first boss groove 1203 is larger than the inner diameter of the channel hole. A reset member 1204 is fixedly provided in the first boss groove 1203, and the handle 1202 is provided with a boss portion in a ring shape, and the boss portion is inserted into the first boss groove 1203, and the reset member 1204 abuts against the boss portion, so that when the operating handle 1202 is moved in the first direction, the reset member 1204 is compressed, and the reset member 1204 has a tendency to move the handle 1202 in the second direction. When the handle 1202 is unlocked, the reset member 1204 moves the handle 1202 in the second direction, so that the needle 8 automatically returns to the guide tube 6.

[0066] In the above, the reset member 1204 is a spring, and the first direction is Figure 5 The first direction is from a to b, and the second direction is from b to a.

[0067] Also in this embodiment, see Figures 9 to 12 As shown, the water injection device 14 includes a water injection cylinder 1401, a pressure component 1406 and a pressing component 1407. The front end of the water injection cylinder 1401 is connected to a connecting pipe 1402, and the front end of the connecting pipe 1402 is provided with a joint, which is threadedly connected to the water injection channel 1207. The inside of the water injection cylinder 1401 is provided with a push screw 1403, and the front end of the push screw 1403 is provided with a piston, which is located in the water injection cylinder 1401 and moves. The rear end of the push screw 1403 is provided with a handle 1405, and the water injection operation of the water injection device 14 can be realized by operating the push screw 1403.

[0068] In a specific embodiment, see Fig.11 As shown, the pressure assembly 1406 includes a sleeve 14061 and an elastic pressure plate. The sleeve 14061 is integrally formed at the rear end of the water injection cylinder 1401, and the sleeve 14061 is axially provided with a channel hole for the injection screw 1403 to extend out. The inner diameter of the channel hole is slightly larger than the outer diameter of the injection screw 1403, so that the injection screw 1403 can be freely pulled along the sleeve 14061. The sleeve 14061 is radially provided with at least one pair of guide holes 14062, and the side walls of the guide holes 14062 are also provided with limiting side grooves 14063 extending radially along the sleeve 14061. The guide holes 14062 are through-set, and the limiting side grooves 14063 are closed on both sides. The elastic pressure plate includes a plate body 14064 and an elastic member. The plate body 14064 is integrally formed with side plates 14065 on both sides. The plate body 14064 is arranged to slide in the guide hole 14062, and the side plates 14065 are arranged to slide in the limiting side groove 14063. The elastic member includes a radial spring 14066 and a guide post 14067. One end of the guide post 14067 is arranged in the limiting side groove 14063 close to the channel hole, and the other end of the guide post 14067 is fitted with the radial spring 14066. The end of the radial spring 14066 away from the guide post 14067 is fixed to the side plate 14065. At the same time, the side of the plate body 14064 facing the channel hole is a circular arc surface adapted to the channel hole, and the surface of the circular arc surface is provided with a thread 1404 adapted to the injection screw 1403. In a natural state, the plate body 14064 does not contact the injection screw 1403.

[0069] See above Fig.12As shown, the pressing assembly 1407 includes a pressing block 14071 with one end hinged to the outer wall of the sleeve 14061, and a pressing boss 14072 is integrally formed on the surface of the pressing block 14071 facing the sleeve 14061. The pressing boss 14072 protrudes toward the side of the plate body 14064, and the pressing boss 14072 always maintains abutment with the plate body 14064, so that the other end of the pressing block 14071 is tilted toward the side away from the outer wall of the sleeve 14061.

[0070] It can be seen that when the water injection device 14 is in use, when fast water injection is required, no pressure is applied to the pressing assembly 1407. At this time, the plate body 14064 of the elastic pressure plate does not contact the pushing screw 1403, and the pushing screw 1403 and the sleeve 14061 are in a sliding connection state. Pushing the pushing screw 1403 can achieve fast water injection; when the water injection speed needs to be reduced, the pressing block 14071 is pressed by hand, and the pressing block 14071 approaches the surface of the sleeve 14061. The pressing convex head 14072 applies pressure to the plate body 14064 of the elastic pressure plate, so that the plate body 14064 moves toward the inside of the sleeve 14061, and the inner arc surface of the plate body 14064 completes threaded engagement with the pushing screw 1403. At this time, the pushing screw 1403 cannot be pushed quickly, and water injection can only be completed by rotating the pushing screw 1403, which can reduce the water injection speed. When the water needs to be pumped out, release the pressing block 14071, and the radial spring 14066 pushes the plate body 14064 outward, thereby lifting the pressing block 14071, and the plate body 14064 is separated from the injection screw 1403, so that the water can be quickly pumped out, which is very convenient.

[0071] Of course, in a preferred embodiment, in order to save effort when pressing the pressing block 14071 to rotate the injection screw 1403, see Fig. 9 and Fig.12 As shown, the raised end of the pressing block 14071 is provided with a buckle 1408 facing the outer wall of the sleeve 14061, and the outer wall of the sleeve 14061 is provided with a slot 1409 corresponding to the buckle 1408. It can be imagined that when the pressing block 14071 moves downward close to the sleeve 14061, the buckle 1408 is inserted into the slot 1409 and locked, so that there is no need to continuously apply force to the pressing block 14071, and rotating the injection screw 1403 can save effort.

[0072] In addition, Fig.10 As shown, the front end of the water injection cylinder 1401 is provided with an electronic pressure gauge 1410 connected to the inner cavity of the water injection cylinder 1401, and the electronic pressure gauge 1410 is convenient for accurately reading the pressure value. The electronic pressure gauge 1410 includes a core board and a pressure sensor chip disposed on the back of the core board and electrically connected to the core board. The pressure sensor chip is more accurate than the ceramic pressure sensor.

[0073] Also in this embodiment, see Figures 13 to 16 As shown, the heating control assembly 15 includes an electrical box 151, which is composed of a box body 1511 and a box cover 1512. The box cover 1512 is buckled on the box body 1511 and sealed by a sealant. A mounting plate 152 for mounting an electrical component 154 is provided inside the electrical box 151. The mounting plate 152 divides the inner cavity of the electrical box 151 into a first chamber and a second chamber. The first chamber is located below the mounting plate 152. A radiator is provided in the first chamber for fanning the electrical box 151. The electrical component 154 is installed in the second chamber. The electrical component 154 includes, but is not limited to, a thermostat, a relay, a rectifier, a power supply, etc. The electrical components 154 based on the power supply, rectifier, relay, and thermostat are connected to the wire 13 for connecting the heating wire to form a closed loop, so that the heating wire 9 is energized and heated. It should be noted that the line connection between the electrical components 154 is a conventional power supply circuit, which is not shown in this embodiment, and the thermostat model may be OHR-E310A-55.

[0074] In a preferred embodiment, the mounting base plate of the conventional electrical component 154 itself is provided with threaded holes, and then installed in the electrical box 151 by bolts, which makes disassembly, assembly and replacement more troublesome. Figures 13 to 15 As shown, mounting holes 153 are evenly distributed on the mounting plate 152, and the mounting holes 153 are round holes and are set through the mounting plate 152. The original threaded holes set on the mounting seat plate of the electrical component 154 remain unchanged, but the difference is that a threaded pin 155 is set in the threaded hole, and the end of the threaded pin 155 away from the mounting seat plate is integrally formed with an outwardly expanded V-shaped plug-in portion 1551, which is inserted into and tightened in the mounting hole 153.

[0075] It is not difficult to imagine that based on the structural design of the V-shaped plug-in portion 1551 of the threaded pin 155, when installing the electrical component 154, the V-shaped plug-in portion 1551 is inserted into the mounting hole 153, and the V-shaped plug-in portion 1551 is squeezed inward by the mounting hole 153, and at the same time, the V-shaped plug-in portion 1551 has a tendency to expand outward and reset due to its own pressure, so that the V-shaped plug-in portion 1551 is clamped in the mounting hole 153, and the electrical component 154 is fixedly installed. At the same time, the electrical component 154 can be removed from the mounting plate 152 by simply pulling out the V-shaped plug-in portion 1551. It can be seen that the present application can realize the rapid disassembly and assembly between the electrical component 154 and the electrical box 151, which is very convenient.

[0076] In an exemplary implementation, in order to facilitate rapid heat dissipation of the electrical box 151, as shown in FIG. Fig.13As shown, heat dissipation holes 157 are provided on the side wall of the box body 1511 to ensure good heat dissipation effect of the electrical box 151, and at the same time, a dust-proof gauze is provided on the inner side of the box body 1511 to reduce dust from entering the electrical box 151.

[0077] In a preferred embodiment, Fig.16 As shown, a rotatable cable clamp 156 is provided on the mounting plate 152, and the cable clamp 156 includes a base 1561 and a cover plate 1562, wherein the lower bottom surface of the base 1561 is also inserted into the mounting hole 153 through a threaded pin 155, one end of the cover plate 1562 is rotatably connected with the base 1561 through a pivot, and the other end of the cover plate 1562 is buckled with the base 1561. It is not difficult to understand that by providing the cable clamp 156, the connecting wires 13 between the electrical components 154 can be fixed to avoid the wires 13 being messy.

[0078] In summary, the medical device for performing thermal ablation in the intestine provided in the embodiment of the present application has the following usage method or working principle:

[0079] First, the sheath tube 1 is introduced into the intestine along with the endoscope. After reaching the designated position, the distal end angle of the sheath tube 1 is adjusted by changing the angle of the endoscope so that the distal end of the guide tube 6 fits the intestinal mucosa. Then, the operating handle 1202 is moved forward, so that the handle 1202 drives the water injection tube 3 to move forward along the axial direction of the sheath tube 1. The reversing valve 5 moves forward synchronously so that the liquid outlet 511 is connected with the sealing plug 58, and at the same time drives the needle tube 7 and the needle 8 to move forward. The needle 8 extends out of the guide tube 6 and penetrates into the intestinal mucosa. Between the membrane layer and the muscle layer, water is injected into the water injection channel through the water injection device 14, and the water enters the water injection pipe 3 through the water injection channel 1207. Since the liquid outlet 511 is blocked by the sealing plug 58, as the water pressure in the water injection pipe 3 and the valve cavity 59 increases, the valve core 550 is pushed into the large-pore channel 521 of the liquid guide tube 52, and the liquid enters the needle tube 7 through the gap between the valve core 550 and the large-pore channel 521, and is injected by the needle 8 between the intestinal mucosal layer and the muscle layer to form protective water. It should be noted that the protective water needs to be injected into multiple locations of the intestinal annular wall to protect the intestinal annular wall.

[0080] After the injection of protective water is completed, press the pressing plate to make the elastic locking piece 1205 withdraw from the card hole, and move the handle 1202 backward to move the water injection pipe 3 backward. At this time, the reversing valve 5 moves backward synchronously, and the liquid outlet 511 is separated from the sealing plug 58. At this time, the liquid enters the sheath 1 through the liquid outlet 511, and enters the capsule 2 through the water hole 4 at the end of the sheath 1. The pressure relief valve 55 reseals the liquid guide tube 52 under the action of the spring 551 due to the pressure loss 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 control component 15 can be turned on to heat the heating wire 9 to a preset temperature to thermally ablate the intestinal mucosa.

[0081] It can be seen that the medical device for performing thermal ablation in the intestine proposed in the embodiment of the present application, after entering the intestine through the sheath 1 through the endoscope, the water injection tube 3 is moved forward to make the needle 8 extend out of the guide tube 6, and then the needle 8 is inserted between the intestinal mucosal layer and the muscle layer under the endoscopic operation to inject a protective liquid (water), which can avoid irreversible damage to the muscle layer caused by thermal ablation. At the same time, the water injection tube 3 moves backward to inject water into the capsule 2, and the water is heated under the action of the electric heating wire 9 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.

[0082] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A medical device for performing thermal ablation in the intestine, characterized in that include: A sheath tube, wherein a first end connector and a second end connector are disposed at the proximal end of the sheath tube; A sac body, the sac body is arranged on the outer wall of the distal end of the sheath tube, a sealing end plate is arranged at one end of the sheath tube located at the sac body, a guide tube connected to the outside of the sac body is centrally arranged on the sealing end plate, and water holes communicating with the sac body are arranged around the guide tube; A water injection pipe, the water injection pipe is inserted into the sheath tube and can move forward and backward along the sheath tube, a reversing valve is provided at one end of the water injection pipe located at the capsule, a needle tube is provided at one end of the reversing valve away from the water injection pipe, the needle tube is inserted into the guide tube, and a needle is provided on the needle tube, the forward and backward movement of the water injection pipe can switch the reversing valve to discharge liquid from the water hole or from the needle tube, and at the same time, the needle can be extended or retracted into the guide tube; The adjusting device comprises a shell and a handle, wherein the shell is fixedly connected to the first end joint, and a piston sleeve is clamped in the shell; the handle is slidably arranged in the shell and passes through the piston sleeve, and the two are tightly connected, the water injection pipe passes through the first end joint and is fixedly connected to the handle, and the handle is axially provided with a water injection channel identical to that of the water injection pipe, and the handle is used to realize the forward and backward movement of the water injection pipe in the sheath tube; A water injection device, the water injection device is connected to the regulating device, and the water injection device injects water into the water injection pipe through the water injection channel; a heating wire, the heating wire being coiled on the outer wall of the sheath tube located in the capsule; and, A heating control assembly, wherein the heating control assembly is conductively connected to the heating wire via a wire, and the wire enters and exits from the second end connector and is arranged along the sheath tube; Wherein, the water injection device comprises: A water injection cylinder, wherein a push screw is arranged inside the water injection cylinder, and a connecting pipe connected to the water injection channel is arranged at the front end of the water injection cylinder; A pressure assembly, the pressure assembly comprising a sleeve integral with the water injection cylinder, the sleeve being provided with a passage hole for the push screw to extend out, the sleeve being provided with at least one pair of elastic pressure plates radially capable of approaching and moving away from the sleeve axis, the elastic pressure plate being provided with a thread matching the push screw on one side facing the sleeve axis; and, A pressing assembly includes a pressing plate with one end hinged to the outer wall of the sleeve, a pressing head is integrally formed on the surface of the pressing plate facing the sleeve, and the pressing head abuts against the elastic pressure plate so that the other end of the pressing plate is tilted away from the outer wall of the sleeve.

2. The medical device for performing thermal ablation in the intestine according to claim 1, characterized in that The reversing valve comprises: A valve housing, wherein a valve cavity is disposed in the valve housing, a liquid guide tube connected to the needle tube is disposed in the valve cavity, a pressure relief valve is disposed in the liquid guide tube, a first liquid inlet and a second liquid inlet are disposed 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 disposed 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 medical 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 medical 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 is adapted to the inner diameter of the small hole channel, and the outer diameter of the large diameter section is smaller than the inner diameter of the large hole channel; A spring is sleeved on the small diameter section, and two ends of the spring are respectively fixed to the end surface of the large diameter section and the connecting end surfaces 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 medical device for performing thermal ablation in the intestine according to claim 2, characterized in that The valve housing is provided with a conical plug which is pushed into the liquid guiding tube at the second liquid inlet.

6. The medical device for performing thermal ablation in the intestine according to claim 1, characterized in that The housing is axially provided with a passage hole for accommodating the handle, and a resetting member for causing the handle to slide along the second direction is arranged in the passage hole.

7. The medical device for performing thermal ablation in the intestine according to claim 1, characterized in that A guide groove extending along a first direction is provided on the hole wall of the channel hole, and the handle is integrally formed with a guide side protrusion extending to slide in the guide groove, and the guide side protrusion is provided with an elastic locking piece protruding toward the outside of the shell along a direction perpendicular to the first direction, and the shell is provided with a locking hole along a direction perpendicular to the first direction, and when the handle slides relative to the shell along the first direction, the elastic locking piece can extend into the locking hole to lock the handle.

8. The medical device for performing thermal ablation in the intestine according to claim 7, characterized in that An elastic pressing piece is arranged on the outer wall of the shell, and when the elastic pressing piece is pressed, the elastic locking piece can be pushed back into the shell to release the lock on the handle.

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