Device for treating the lining of the digestive tract

Abstract

The application relates to a device for processing the inner wall tissue of a digestive tract, which comprises an elongated rod, a torque tube, a sheath tube and an expandable component, wherein the expandable component comprises an outer support frame and an inner rotating frame, the outer support frame and the inner rotating frame can be transformed between a contraction working state and an expansion working state, the inner rotating frame can rotate in the outer support frame, and a scraping part on the inner rotating frame can abrade the inner wall of the digestive tract after approaching the outer support frame, so that the device has the advantage of safety in use.

Description

[0001] This invention claims priority to Chinese patent application number CN2025110744957, filed on August 1, 2025. Technical Field

[0002] This invention relates to a medical device, particularly a device for scraping and grinding the inner wall tissue of the digestive tract. Background Technology

[0003] In existing technologies, the use of electric field ablation or mechanical scraping to treat the villi or mucosa of the duodenal lining to treat diabetes has gained widespread consensus in the medical community. For example, in the invention patent application CN103582463A published by the Chinese Patent Office, the treatment component uses an inflatable part such as a balloon. Scrapers or abrasives are arranged on the outer surface of the inflatable part. When the inflatable part reaches the duodenum, liquid is injected into the balloon to inflate it and support the duodenum. Rotating or pulling the balloon back and forth allows the scrapers or abrasives on its outer surface to abrade the duodenal mucosa. However, due to individual differences in patients, the diameter of the duodenum varies from person to person. The larger the inflatable part's diameter, the greater the pressure on the duodenal wall. Therefore, existing techniques for abrading the duodenum rely entirely on the doctor's experience. The same procedure can result in significant differences in the amount of duodenal mucosa abraded by different individuals, making it difficult to safely remove the duodenal mucosa. Summary of the Invention

[0004] The purpose of this invention is to provide a device and its use for treating the tissue lining of the digestive tract, which has better safety features.

[0005] The technical solution of the present invention is: a device for treating the tissue lining of the digestive tract, comprising: Slender rod; A torque tube is sleeved on the slender rod, and the torque tube is configured to slide along the axial direction of the slender rod and rotate around the axis of the slender rod. A sheath, which is sleeved on the torque tube, and the torque tube is rotatably disposed relative to the sheath; An expandable component surrounding the front portion of the elongated rod, the expandable component comprising: An outer support frame has a retracted working state and an expanded working state in the radial direction. The front end of the outer support frame is fixedly connected to the front part of the slender rod, and the rear end of the outer support frame is fixedly connected to the front part of the sheath. During the process of the sheath moving backward or forward relative to the slender rod, the outer support frame changes between the retracted working state and the expanded working state. An inner rotating bracket is located inside the outer support frame and has a contracted working state and an expanded working state in the radial direction. The inner rotating bracket has a scraping part. The front end of the inner rotating bracket is rotatably connected to the front of the slender rod, and the rear end of the inner rotating bracket is fixedly connected to the torque tube. As the torque tube moves backward or forward relative to the slender rod, the inner rotating bracket changes between the contracted and expanded working states. When the torque tube rotates relative to the slender rod, the inner rotating bracket also rotates relative to the outer support frame. When the inner rotating bracket is in the expanded working state, the scraping part is close to the outer support frame.

[0006] Alternatively, the torque tube may be configured to allow rotation relative to the sheath but prohibit movement in the forward and backward directions.

[0007] Optionally, the outer wall surface of the torque tube is provided with an annular groove, and the inner wall surface of the sheath tube is fixedly provided with an annular protrusion that fits into the annular groove; or, the inner wall surface of the sheath tube is provided with an annular groove, and the outer wall surface of the torque tube is fixedly provided with an annular protrusion that fits into the annular groove.

[0008] Optionally, the front end of the inner rotating bracket is connected to the front of the slender rod in a way that prevents it from moving in the front-back direction.

[0009] Optionally, the inner rotating bracket includes multiple front support rods, multiple middle support rods, and multiple rear support rods. The front end of each front support rod is fixedly connected to a front connecting seat, which is rotatably fitted onto the front of the slender rod. The rear end of each rear support rod is fixedly connected to the torque tube. The front end of each middle support rod is connected to the rear end of each front support rod, and the rear end of each middle support rod is connected to the front end of each rear support rod. The multiple middle support rods are circumferentially distributed around the slender rod. When the inner rotating bracket is in its expanded working state, the middle support rods are parallel to the slender rod, and the scraping part is disposed on the middle support rod.

[0010] Optionally, the front connecting seat is located behind the fixed connection between the outer support frame and the slender rod, and the slender rod is provided with a radially protruding limiting member to prevent the front connecting seat from moving along the front-back direction of the slender rod.

[0011] Optionally, the front end of each middle section support rod is fixedly connected to the rear end of each front section support rod to form a front connecting part, and the rear end of each middle section support rod is fixedly connected to the front end of each rear section support rod to form a rear connecting part. When the inner rotating bracket is in the expanded working state, the front connecting part is in a bent state, and the rear connecting part is also in a bent state.

[0012] Optionally, each of the intermediate support rods constitutes the scraping part, and the wire diameter of each intermediate support rod is 0.05~0.3mm.

[0013] Optionally, the scraping part is a scraper provided on each of the middle support rods, and the scraper has a cutting edge on the middle support rod along its front-back direction.

[0014] Alternatively, the scraping part may be an abrasive element disposed on each of the intermediate support rods, the abrasive element having a rough surface on the intermediate support rod.

[0015] Optionally, the outer support frame includes a front outer support frame, a middle outer support frame, and a rear outer support frame connected in sequence, wherein the middle outer support frame is mesh-like; when the outer support frame is in an expanded working state, the middle outer support frame is distributed on a cylindrical surface with a slender rod as the axis, and the scraping part is close to the middle outer support frame.

[0016] Optionally, the wire diameter of the middle section outer support frame is 0.05~0.5mm.

[0017] Optionally, the torque tube is a flexible, non-rigid component, and when the rear of the torque tube rotates, the front of the torque tube also rotates synchronously.

[0018] Optionally, the outer support frame is made of shape memory alloy material, and the shape of the outer support frame in the expansion working state is the shape memory of the shape memory alloy material; the inner rotating bracket is made of shape memory alloy material, and the shape of the inner rotating bracket in the expansion working state is the shape memory of the shape memory alloy material.

[0019] The device for treating the lining of the digestive tract is used in the treatment of diabetes.

[0020] The device for treating the lining tissue of the digestive tract is used in the treatment of obesity.

[0021] Compared with the prior art, the present invention has the following advantages: When the present invention reaches the digestive tract, especially the duodenum, the external support frame enters an expansion working state to support the inner wall of the digestive tract, and the gaps between the external support frame members are filled by the inner wall of the digestive tract. When the inner rotating support is rotated, the scraping part on the inner rotating support quantitatively scrapes the mucosa on the filled part of the inner wall of the digestive tract. After the distance between the scraping part and the external support frame is fixed, the depth of scraping the mucosa can be controlled, so the mucosa on the inner wall of the digestive tract can be safely scraped. Attached Figure Description

[0022] Appendix Figure 1 This is a front view of the structure of the present invention, showing its expandable component in an expanded working state; Appendix Figure 2 For the appendix Figure 1 BB direction sectional view; Appendix Figure 3 For the appendix Figure 1 A sectional view along the AA direction; Appendix Figure 4 For the appendix Figure 3 Enlarged view of point C, where the scraping part is a scraper; Appendix Figure 5 For the appendix Figure 2 Enlarged view of point D; Appendix Figure 6 This is a front view of the structure of the present invention, showing its expandable component in a retracted working state; Appendix Figure 7 This is the main structural view of the torque tube; Appendix Figure 8 For the appendix Figure 7 EE direction sectional view; Appendix Figure 9 The three-dimensional view of the present invention is shown with the outer support frame omitted, wherein the inner rotating support is in an expanded working state and the scraping part is a scraper; Appendix Figure 10 The main view of the structure of the present invention is shown after omitting the outer support frame, wherein the inner rotating bracket is in an expanded working state and the scraping part is a scraper; Appendix Figure 11 For the appendix Figure 3 Enlarged view of point C, where the scraped part is the middle support rod; Appendix Figure 12 The three-dimensional view of the present invention, omitting the outer support frame, shows the inner rotating bracket in an expanded working state, with the scraped portion being the middle support rod. Appendix Figure 13 The main view of the structure of the present invention is shown after omitting the outer support frame, in which the inner rotating bracket is in an expanded working state and the scraped part is the middle support rod; The components include: 1. Slender rod; 2. Torque tube; 3. Sheath; 4. Expandable component; 5. Outer support frame; 6. Inner rotating bracket; 7. Scraper; 8. Annular groove; 9. Annular protrusion; 10. Front support rod; 11. Middle support rod; 12. Rear support rod; 13. Front connecting seat; 14. Rear connecting seat; 15. Limiting component; 16. Front connecting part; 17. Rear connecting part; 18. Front outer support frame; 19. Middle outer support frame; 20. Rear outer support frame; 21. Guide wire through hole; 22. Groove. Detailed Implementation

[0023] In this invention, the digestive tract refers to the oral cavity, esophagus, stomach, duodenum, small intestine, large intestine, and anus, while the upper digestive tract refers to the areas that a gastroscopy can penetrate, including the esophagus, stomach, and duodenum. This invention is particularly applicable to the upper digestive tract, and even more particularly to the duodenum. "Front" in this invention refers to the direction in which the device advances into the digestive tract, and "rear" refers to the direction in which it retracts, for example, as shown in the attached image. Figure 6 In this context, the left-facing direction is considered the front, and the right-facing direction is considered the rear. The terms "front" and "rear" in this article are defined in the same direction. The front end also refers to the end furthest from the operator (doctor), and is also known in the industry as the distal end; the rear end refers to the end closest to the operator, and is also known in the industry as the proximal end.

[0024] See appendix Figure 1 To be continued Figure 13 A device for treating the lining tissue of the digestive tract, comprising: The slender rod 1 is tubular, with a guide wire through hole 21 axially opened in its center for the guide wire to pass through during surgery; Torque tube 2, which is sleeved on the slender rod 1, is configured to slide along the axial direction of the slender rod 1 and rotate about its axis; as shown in the attached figure. Figure 7 and attached Figure 8 As shown, the torque tube 2 is a flexible, non-rigid component, which facilitates forward or backward movement within the curved digestive tract. This non-rigid component can transmit torque well, meaning that when the rear of the torque tube 2 rotates, the front of the torque tube 2 also rotates synchronously. To facilitate bending, grooves 22 are spaced axially on the outer surface of the torque tube 2. Various flexible tubular components described in US10420537B2 can also be used as torque tubes 2. The sheath 3 is sleeved on the torque tube 2, and the torque tube 2 is rotatably arranged relative to the sheath 3. The torque tube 2 is allowed to rotate relative to the sheath 3 but is prohibited from moving forward or backward, so that when the sheath 3 moves forward or backward, the torque tube 2 also moves synchronously in the forward or backward direction. However, the torque tube 2 can rotate around the slender rod 1 while the sheath 3 does not rotate relative to the slender rod 1. See the appendix for details. Figure 5 The outer wall surface of the torque tube 2 is provided with an annular groove 8, and the inner wall surface of the sheath tube 3 is fixedly provided with an annular protrusion 9 that fits into the annular groove 8; another (not shown) structure with the same function but opposite is provided with an annular groove 8 on the inner wall surface of the sheath tube 3, and an annular protrusion that fits into the annular groove 8 on the outer wall surface of the torque tube 2. An expandable component 4 surrounds the front of the slender rod 1. The expandable component 4 includes an outer support frame 5 and an inner rotating bracket 6, wherein the outer support frame 5 and the inner rotating bracket 6 have a retracted working state and an expanded working state in the radial direction, respectively.

[0025] The front end of the outer support frame 5 is fixedly connected to the front of the slender rod 1, and the rear end of the outer support frame 5 is fixedly connected to the front of the sheath tube 3. Pushing the sheath tube 3 forward or pulling it backward relative to the slender rod 1 allows the outer support frame 5 to enter the attachment... Figure 6 The shrinkage working state or attachment shown Figure 1 The diagram shows the expanded working state. Simultaneously, the inner rotating bracket 6 also enters the attached... Figure 6 The shrinkage working state or attachment shown Figure 9 The expanded working state is shown.

[0026] The inner rotating bracket 6 is located inside the outer support frame 5; the inner rotating bracket 6 has a scraping part, and the front end of the inner rotating bracket 6 is rotatably but prevented from moving forward or backward in the front of the slender rod 1. The rear end of the inner rotating bracket 6 is fixedly connected to the torque tube 2 through the rear connecting seat 14. During the process of the torque tube 2 moving backward or forward relative to the slender rod 1, the inner rotating bracket 6 is in a retracted working state (as shown in the attached figure). Figure 6 ) and expanded working status (as shown in the appendix) Figure 9 and attached Figure 10The torque tube 2 and the sheath tube 3 move forward or backward synchronously along the slender rod, so the inner rotating bracket 6 and the outer support frame 5 also enter the contraction or expansion working state synchronously. When the torque tube 2 rotates relative to the slender rod 1, the inner rotating bracket 6 is driven to rotate relative to the outer support frame 5. When the inner rotating bracket 6 is in the expansion working state and rotates, the scraping part is close to the outer support frame 5 and scrapes the inner wall of the digestive tract embedded in the gap of the outer support frame 5.

[0027] See appendix Figure 9 and attached Figure 10 The inner rotating bracket 6 includes multiple front support rods 10, multiple middle support rods 11, and multiple rear support rods 12. The front end of each front support rod 10 is fixedly connected to a front connecting seat 13, which is rotatably fitted onto the front of the slender rod 1. The rear end of each rear support rod 12 is fixedly connected to the torque tube 2 via a rear connecting seat 14. The front end of each middle support rod 11 is connected to the rear end of each front support rod 10, and the rear end of each middle support rod 11 is connected to the front end of each rear support rod 12. The multiple middle support rods 11 are circumferentially distributed around the slender rod 1. When the inner rotating bracket 6 is in its expanded working state, each middle support rod 11 is parallel to the slender rod 1, and the scraping part is disposed on the middle support rod 11. (See attached diagram) Figure 2 The front connecting seat 13 is located behind the fixed connection between the outer support frame 5 and the slender rod 1. At the rear of the front connecting seat 13, a radially protruding limiting member 15 is provided on the slender rod 1 to prevent the front connecting seat 13 from moving along the front-back direction of the slender rod 1, so that the front connecting seat 13 can only rotate on the slender rod 1.

[0028] See appendix Figure 9 and attached Figure 10 The front end of each intermediate support rod 11 is fixedly connected to the rear end of each front support rod 10 to form a front connecting part 16, and the rear end of each intermediate support rod 11 is fixedly connected to the front end of each rear support rod 12 to form a rear connecting part 17. When the inner rotating bracket 6 is in the expanded working state, the front connecting part 16 is in a bent state, and the rear connecting part 17 is also in a bent state. See Appendix. Figure 6 When the inner rotating bracket 6 is in the retracted working state, the front connecting part 16 is in a straight state, and the rear connecting part 17 is also in a straight state.

[0029] In some specific implementations, see the appendix. Figure 10 Appendix Figure 4The scraping part is a scraper 7, which has a cutting edge formed along the front-rear direction on the middle support rod 11, or the scraping part is an abrasive part formed on the middle support rod 11 with a rough surface. In other specific embodiments, see the appendix. Figure 11-13 Each of the intermediate support rods 11 constitutes the scraping part, and the wire diameter of each intermediate support rod is 0.05~0.3mm.

[0030] See appendix Figure 1 and attached Figure 2 The external support frame 5 includes a front external support frame 18, a middle external support frame 19, and a rear external support frame 20 connected in sequence. The middle external support frame 19 is mesh-like, and the wire diameter of the middle external support frame 19 is 0.05~0.5mm. When the inner wall of the digestive tract is stretched by the external support frame 5, the tissue of the inner wall of the digestive tract will be embedded in the mesh pores under pressure. When the external support frame 5 is in the expanded working state, the middle external support frame 19 is distributed on a cylindrical surface with the slender rod 1 as the axis, so as to conform to the shape of the inner lumen of the digestive tract, especially the duodenum. The scraping part is close to the middle external support frame 19.

[0031] The outer support frame 5 is made of shape memory alloy material, such as nickel-titanium alloy material. The shape of the outer support frame 5 in the expansion working state is the shape memory of the shape memory alloy material. The inner rotating bracket 6 is made of shape memory alloy material, such as nickel-titanium alloy material. The shape of the inner rotating bracket 6 in the expansion working state is the shape memory of the shape memory alloy material. The shape memory makes the expansion shape of the expandable component fixed, and when entering the expansion working state from the contraction working state, the elastic force of the shape memory partially offsets the pressure of the digestive tract wall, thereby making the operation of the expandable component from the contraction working state to the expansion working state more effortless.

Claims

1. A device for treating the lining tissue of the digestive tract, characterized in that, It includes: Slender rod; A torque tube is sleeved on the slender rod, and the torque tube is configured to slide along the axial direction of the slender rod and rotate around the axis of the slender rod. A sheath, which is sleeved on the torque tube, and the torque tube is rotatably disposed relative to the sheath; An expandable component surrounding the front portion of the elongated rod, the expandable component comprising: An outer support frame has a retracted working state and an expanded working state in the radial direction. The front end of the outer support frame is fixedly connected to the front part of the slender rod, and the rear end of the outer support frame is fixedly connected to the front part of the sheath. During the process of the sheath moving backward or forward relative to the slender rod, the outer support frame changes between the retracted working state and the expanded working state. An inner rotating bracket is located inside the outer support frame and has a contracted working state and an expanded working state in the radial direction. The inner rotating bracket has a scraping part. The front end of the inner rotating bracket is rotatably connected to the front of the slender rod, and the rear end of the inner rotating bracket is fixedly connected to the torque tube. As the torque tube moves backward or forward relative to the slender rod, the inner rotating bracket changes between the contracted and expanded working states. When the torque tube rotates relative to the slender rod, the inner rotating bracket also rotates relative to the outer support frame. When the inner rotating bracket is in the expanded working state, the scraping part is close to the outer support frame.

2. The apparatus for treating the lining tissue of the digestive tract according to claim 1, characterized in that, The torque tube is configured to allow rotation relative to the sheath but prohibits movement in the forward and backward directions.

3. The apparatus for treating the lining tissue of the digestive tract according to claim 2, characterized in that, The outer wall surface of the torque tube is provided with an annular groove, and the inner wall surface of the sheath tube is fixedly provided with an annular protrusion that fits into the annular groove; or, the inner wall surface of the sheath tube is provided with an annular groove, and the outer wall surface of the torque tube is fixedly provided with an annular protrusion that fits into the annular groove.

4. The apparatus for treating the lining tissue of the digestive tract according to claim 1, characterized in that, The front end of the inner rotating bracket is connected to the front of the slender rod in a way that prevents it from moving back and forth.

5. The apparatus for treating the lining tissue of the digestive tract according to claim 1, characterized in that, The inner rotating bracket includes multiple front support rods, multiple middle support rods, and multiple rear support rods. The front end of each front support rod is fixedly connected to a front connecting seat, which is rotatably fitted onto the front of the slender rod. The rear end of each rear support rod is fixedly connected to the torque tube. The front end of each middle support rod is connected to the rear end of the front support rod, and the rear end of each middle support rod is connected to the front end of the rear support rod. The multiple middle support rods are circumferentially distributed around the slender rod. When the inner rotating bracket is in its expanded working state, the middle support rods are parallel to the slender rod, and the scraping part is disposed on each middle support rod.

6. The apparatus for treating the lining tissue of the digestive tract according to claim 5, characterized in that, The front connecting seat is located behind the fixed connection between the outer support frame and the slender rod. The slender rod is provided with a radially protruding limiting member to prevent the front connecting seat from moving along the front-back direction of the slender rod.

7. The apparatus for treating the lining tissue of the digestive tract according to claim 5, characterized in that, The front end of each middle section support rod is fixedly connected to the rear end of each front section support rod to form a front connecting part, and the rear end of each middle section support rod is fixedly connected to the front end of each rear section support rod to form a rear connecting part. When the inner rotating bracket is in the expanded working state, the front connecting part is in a bent state, and the rear connecting part is also in a bent state.

8. The apparatus for treating the lining tissue of the digestive tract according to claim 5, characterized in that, Each of the intermediate support rods constitutes the scraping part, and the wire diameter of each intermediate support rod is 0.05~0.3mm.

9. The apparatus for treating the lining tissue of the digestive tract according to claim 5, characterized in that, The scraping part is a scraper installed on each of the middle support rods, and the scraper has a cutting edge on the middle support rod along its front-back direction.

10. The apparatus for treating the lining tissue of the digestive tract according to claim 5, characterized in that, The scraping part is an abrasive component provided on each of the intermediate support rods, and the abrasive component has a rough surface on the intermediate support rod.

11. The apparatus for treating the lining tissue of the digestive tract according to claim 8, 9, or 10, characterized in that, The outer support frame includes a front outer support frame, a middle outer support frame, and a rear outer support frame connected in sequence. The middle outer support frame is mesh-like. When the outer support frame is in an expanded working state, the middle outer support frame is distributed on a cylindrical surface with a slender rod as the axis, and the scraping part is close to the middle outer support frame.

12. The apparatus for treating the lining tissue of the digestive tract according to claim 11, characterized in that, The wire diameter of the middle section outer support frame is 0.05~0.5mm.

13. The apparatus for treating the lining tissue of the digestive tract according to claim 1, characterized in that, The torque tube is a flexible, non-rigid component. When the rear of the torque tube rotates, the front of the torque tube also rotates synchronously.

14. The apparatus for treating the lining tissue of the digestive tract according to claim 1, characterized in that, The outer support frame is made of shape memory alloy material, and its shape in the expanded working state is the shape memory of the shape memory alloy material; the inner rotating bracket is made of shape memory alloy material, and its shape in the expanded working state is the shape memory of the shape memory alloy material.

15. Use of a device for treating the lining of the digestive tract as described in claims 1-14 in the treatment of diabetes.

16. Use of a device for treating the lining tissue of the digestive tract as described in claims 1-14 in the treatment of obesity.

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