Disposable esophageal stent system
By introducing a magnetic torsion device and a stent torsion posture recognition unit into the inserter of the esophageal stent system, the axial rotation adjustment of the stent is realized, which solves the problem of torsional displacement during the release of the esophageal stent, and improves the safety and accuracy of the surgery.
Patent Information
- Application Number
- CN202410939620.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2044-07-15
AI Technical Summary
Existing esophageal stents are prone to torsion and dislocation during release, resulting in increased difficulty in surgery and may lead to surgical failure.
A disposable esophageal bracket system is designed, including an inserter and a bracket bracket. The inserter is equipped with a magnetic twisting device and a bracket torsional attitude recognition unit. The rotation ring and push plug are controlled by a magnetic sensor and an electromagnetic magnet to achieve axial rotation adjustment of the bracket.
It effectively avoids torsion and displacement of the stent during the release process, and improves the safety and accuracy of the operation.
Smart Images
Figure CN119857003A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of esophageal stents, and in particular to a disposable esophageal stent system. Background Art
[0002] At present, in clinical esophageal interventional treatment, an esophageal stent delivery system is usually used to deliver a memory alloy esophageal stent to the lesion under X-ray or direct endoscopy, and then the esophageal stent is released to achieve the purpose of treating or alleviating symptoms by using the radial support force of the esophageal stent itself. The structure of the current esophageal stent delivery system includes an outer sheath, a middle tube, a core tube, a positioning guide head, a large handle, a fixed handle and a small handle. The connection is as follows: the front end of the core tube is the positioning guide head, followed by the middle tube and the small handle; the middle tube is followed by the outer sheath, the large handle assembly, the fixed handle and the small handle. During the loading process, the esophageal stent is pre-loaded in the esophageal stent delivery system and the safety lock sleeve is locked. During the operation, the esophageal stent is delivered to the patient's lesion. After the position is determined, the safety lock is released, the large handle is withdrawn to release the esophageal stent to the lesion, and finally the delivery system is withdrawn from the patient.
[0003] However, if the existing esophageal stent is found to be twisted and displaced after a part of it is released and needs to be slightly adjusted, it cannot be adjusted, which increases the difficulty of the operation or may cause the failure of the operation. Therefore, it is an urgent problem to solve the twisting and dislocation during the release of the esophageal stent and to achieve timely adjustment during the implantation of the esophageal stent. Summary of the invention
[0004] The present invention provides a disposable esophageal stent system to solve the problems raised in the above background technology.
[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A disposable esophageal stent system comprises an inserter and a stent support, wherein the inserter comprises an outer sheath tube, one end of the outer sheath tube is fixedly connected to a handle, a controller with a display screen is provided on the side wall of the handle, a middle tube passes through the outer sheath tube, one end of the middle tube passes through the side wall of the handle and is fixedly connected to a push rod, the other end of the middle tube is fixedly connected to a guide head, the guide head is located at one end of the outer sheath tube, the stent is compressed and loaded into the interior of the outer sheath tube, a push plug is fixedly connected to the middle tube, the push plug abuts against the side wall of one end of the stent, a linear permanent magnetic film strip is fixedly connected to the side wall of the stent, a magnetic sensor is fixedly connected to the inner wall of one end of the outer sheath tube, the magnetic sensor is electrically connected to the controller, and a magnetic twisting device is provided at one end of the outer sheath tube.
[0006] Preferably, the magnetic torsion device includes an adjusting ring, which is fixedly connected to one end of the outer sheath tube, the inner ring of the adjusting ring is rotatably connected to a rotating ring, three sliding plates are fixedly connected to the outer wall of the rotating ring, the three sliding plates are slidably connected to the inner wall of the adjusting ring, two pulling springs are fixedly connected between the rotating ring and the side wall of the adjusting ring, an iron plate is fixedly connected to the side wall of the pulling spring, and electromagnet devices are respectively provided on the left and right sides of the iron plate, and the two electromagnet devices are electrically connected to the controller.
[0007] Preferably, each of the electromagnet devices includes an armature rod, the two armature rods are fixedly connected to the inner wall of the adjustment ring and are respectively located on both sides of the iron plate, the two armature rods are wound with induction coils, the two induction coils are electrically connected to a DC power supply through an electromagnetic switch, and the two electromagnetic switches are electrically connected to a controller.
[0008] Preferably, a plurality of densely arranged friction protrusions are provided on the inner ring side wall of the rotating ring, and each of the friction protrusions is made of rubber material.
[0009] Preferably, a transparent cover is installed at the tip of the seeker, a camera is installed inside the transparent cover, and the camera is electrically connected to the controller.
[0010] Preferably, the seeker is arranged in a shuttle shape.
[0011] Preferably, a stent twisting posture recognition unit is provided in the controller, and the stent twisting posture recognition unit is used to recognize whether the stent has a twisting posture in the human body.
[0012] Preferably, the method for establishing the support torsion posture recognition unit includes: S1: Obtain a large number of stent torsion action image samples; S2: marking key points of the stent in the stent torsion motion image sample to obtain a marked stent torsion motion image sample; S3: Based on the labeled bracket twisting action image samples and annotation information, a bracket twisting posture recognition unit is trained.
[0013] Preferably, the key points of the support include: reference key points for locating the support part, and extended key points that cooperate with the reference key points to characterize multiple three-dimensional postures of the corresponding part.
[0014] Preferably, in S3, during training, the input information is divided into a test set and a training set. After the training, the validity of the model is verified in the test set. If the verification fails, the process proceeds to S2 to add more labeled data; if the verification passes, the training ends.
[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention is reasonably designed. During the process of releasing the stent, the stent is timely axially rotated and adjusted, so that the esophageal stent can be stably released along a straight line, thereby avoiding twisting and displacement of the stent and improving the safety and accuracy of the stent surgery.
[0016] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The specific implementation of the present invention is given in detail by the following embodiments and their accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 A schematic diagram of the three-dimensional structure of the disposable esophageal stent system proposed by the present invention; Figure 2 This is a schematic diagram of the formal cross-sectional structure of the disposable esophageal stent system proposed by the present invention; Figure 3 for Figure 2 A is a schematic diagram of the partially enlarged structure of the middle part; Figure 4 for Figure 2 A schematic diagram of the partially enlarged structure of B in the middle; Figure 5 It is a schematic diagram of the structure of the adjustment ring in the present invention; Figure 6 It is a schematic diagram of the front cross-sectional structure of the adjustment ring in the present invention; Figure 7 It is a schematic diagram of the structure of the bracket in the present invention; Figure 8 This is a schematic diagram of a control system of the disposable esophageal stent system proposed in the present invention.
[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Guide head; 2. Adjustment ring; 3. Bracket; 4. Outer sheath; 5. Push plug; 6. Middle tube; 7. Controller; 8. Handle; 9. Push rod; 10. Pull spring; 11. Rotating ring; 12. Friction bump; 13. Sliding plate; 14. Iron plate; 15. Induction coil; 16. Armature rod; 17. Magnetic sensor; 18. Camera; 19. Permanent magnetic film strip; 20. Transparent cover; 21. DC power supply; 22. Electromagnetic switch. DETAILED DESCRIPTION
[0019] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail by way of example with reference to the accompanying drawings in the following paragraphs. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.
[0020] See also Figures 1 to 8 In an embodiment of the present invention, a disposable esophageal stent system includes an inserter and a stent support 3, the inserter includes an outer sheath tube 4, one end of the outer sheath tube 4 is fixedly connected to a handle 8, a controller 7 with a display screen is provided on the side wall of the handle 8, a middle tube 6 is passed through the outer sheath tube 4, one end of the middle tube 6 passes through the side wall of the handle 8 and is fixedly connected to a push rod 9, the other end of the middle tube 6 is fixedly connected to a guide head 1, the guide head 1 is located at one end of the outer sheath tube 4, the support 3 is compressed and loaded into the inner part of the outer sheath tube 4, a push plug 5 is fixedly connected to the middle tube 6, the push plug 5 is against the side wall of one end of the support 3, a linear permanent magnetic film strip 19 is fixedly connected to the side wall of the support 3, a magnetic sensor 17 is fixedly connected to the inner wall of one end of the outer sheath tube 4, the magnetic sensor 17 is electrically connected to the controller 7, and a magnetic twisting device is provided at one end of the outer sheath tube 4.
[0021] Specifically, the magnetic twisting device includes an adjusting ring 2, which is fixedly connected to one end of the outer sheath tube 4. The inner ring of the adjusting ring 2 is rotatably connected to a rotating ring 11. Three sliding plates 13 are fixedly connected to the outer wall of the rotating ring 11. The three sliding plates 13 are slidably connected to the inner wall of the adjusting ring 2. Two pulling springs 10 are fixedly connected between the rotating ring 11 and the side wall of the adjusting ring 2. An iron plate 14 is fixedly connected to the side wall of the pulling spring 10. Electromagnetic devices are respectively provided on the left and right sides of the iron plate 14. The two electromagnet devices are electrically connected to the controller 7. Each electromagnet device includes an armature rod 16. The two armature rods 16 are fixedly connected to the inner wall of the adjusting ring 2 and are respectively located on both sides of the iron plate 14. The two armature rods 16 are both wound with an induction coil 15 , the two induction coils 15 are electrically connected to the DC power supply 21 through the electromagnetic switch 22, and the two electromagnetic switches 22 are electrically connected to the controller 7. A plurality of densely arranged friction protrusions 12 are provided on the inner ring side wall of the rotating ring 11. Each friction protrusion 12 is made of rubber material, which can increase the friction between the rotating ring 11 and the bracket 3. When the induction coil 15 on the armature rod 16 on one side is energized, a magnetic attraction can be generated, which can attract the iron plate 14 to the armature rod 16 on that side for rotation. The rotation of the iron plate 14 can drive the rotating ring 11 to rotate. Therefore, the controller 7 can control the rotating ring 11 to rotate forward and reverse by respectively making the armature rods 16 on both sides generate magnetic attraction. The forward and reverse rotation of the rotating ring 11 can drive the bracket 3 to rotate slightly axially through the friction of the plurality of friction protrusions 12.
[0022] Specifically, a transparent cover 20 is installed at the tip of the guide head 1, a camera 18 is installed in the transparent cover 20, the camera 18 is electrically connected to the controller 7, the guide head 1 is arranged in a shuttle shape, and a bracket twisting posture recognition unit is arranged in the controller 7, the bracket twisting posture recognition unit is used to recognize whether the bracket has a twisting posture in the human body, when the bracket twisting posture recognition unit finds that the bracket 3 has a twisting posture, the controller 7 can be promptly raised on the display screen; The method for establishing the support torsion posture recognition unit includes: S1: Obtain a large number of stent torsion action image samples; S2: labeling the key points of the stent in the stent torsion motion image sample to obtain the labeled stent torsion motion image sample, wherein the key points of the stent include: reference key points for locating the stent part, and extended key points that cooperate with the reference key points to represent multiple three-dimensional postures of the part; S3: Based on the labeled bracket twisting action image samples and annotation information, the bracket twisting posture recognition unit is trained, wherein the input information is divided into a test set and a training set during training. After the training, the validity of the model is verified in the test set. If the verification fails, it goes to S2 to add more labeled data; if the verification passes, the training ends.
[0023] The working principle of the present invention is: When in use, the outer sheath tube 4 can be first guided from the mouth into the esophagus with the guide head 1 as the end, and then the handle 8 and the push rod 9 can be grasped with both hands respectively, and the middle tube 6 can be driven to move in the outer sheath tube 4 by pushing the push rod 9. The movement of the middle tube 6 can drive the push plug 5 to push the stent 3 gradually out of the port of the outer sheath tube 4. After the stent 3 is pushed out of the outer sheath tube 4, it can be expanded and attached to the esophageal wall. In the process of the stent 3 being pushed out of the outer sheath tube 4, when the stent 3 is released along the straight line of the permanent magnetic film strip 19, the controller 7 can detect the magnetic signal of the permanent magnetic film strip 19 through the magnetic sensor 17. If the magnetic sensor 17 cannot detect the magnetic signal of the permanent magnetic film strip 19, it means that the stent 3 has twisted and displaced. The controller 7 can control the two electromagnetic switches 22 respectively to generate an induced current on the induction coils 15 on the two armature rods 16. When the induction coil 15 on one side of the armature rod 16 is energized, a magnetic attraction can be generated, which can attract the iron plate 14 to rotate the armature rod 16 on that side. The rotation of the iron plate 14 can drive the rotating ring 11 to rotate. Therefore, the controller 7 can control the rotating ring 11 to rotate forward and reverse by respectively making the armature rods 16 on both sides generate magnetic attraction. The forward and reverse rotation of the rotating ring 11 can drive the bracket 3 to rotate slightly in the axial direction through the friction of multiple friction bumps 12, so that the permanent magnetic film strip 19 on the bracket 3 is restored to the bottom of the magnetic sensor 17, thereby avoiding torsional displacement caused by the release of the bracket 3.
[0024] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.
Claims
1. A disposable esophageal stent system, comprising an inserter and a stent support (3), characterized in that: The inserter comprises an outer sheath tube (4), one end of which is fixedly connected to a handle (8), a controller (7) with a display screen is provided on the side wall of the handle (8), a middle tube (6) is passed through the inner part of the outer sheath tube (4), one end of the middle tube (6) passes through the side wall of the handle (8) and is fixedly connected to a push rod (9), the other end of the middle tube (6) is fixedly connected to a guide head (1), the guide head (1) is located at one end of the outer sheath tube (4), the bracket (3) is compressed and inserted into the inner part of the outer sheath tube (4), a push plug (5) is fixedly connected to the middle tube (6), the push plug (5) is against the side wall of one end of the bracket (3), a straight permanent magnetic film strip (19) is fixedly connected to the side wall of the bracket (3), a magnetic sensor (17) is fixedly connected to the inner side wall of one end of the outer sheath tube (4), the magnetic sensor (17) is electrically connected to the controller (7), and a magnetic twisting device is provided at one end of the outer sheath tube (4).
2. The disposable esophageal stent system according to claim 1, characterized in that: The magnetic twisting device comprises an adjusting ring (2), wherein the adjusting ring (2) is fixedly connected to one end of an outer sheath tube (4), the inner ring of the adjusting ring (2) is rotatably connected to a rotating ring (11), three sliding plates (13) are fixedly connected to the outer wall of the rotating ring (11), and the three sliding plates (13) are slidably connected to the inner wall of the adjusting ring (2), two pulling springs (10) are fixedly connected between the rotating ring (11) and the side wall of the adjusting ring (2), an iron plate (14) is fixedly connected to the side wall of the pulling spring (10), and electromagnet devices are respectively provided on the left and right sides of the iron plate (14), and the two electromagnet devices are both electrically connected to a controller (7).
3. The disposable esophageal stent system according to claim 2, characterized in that: Each of the electromagnet devices comprises an armature rod (16), the two armature rods (16) are fixedly connected to the inner wall of the adjustment ring (2) and are respectively located on both sides of the iron plate (14), the two armature rods (16) are wound with an induction coil (15), the two induction coils (15) are electrically connected to a DC power supply (21) via an electromagnetic switch (22), and the two electromagnetic switches (22) are electrically connected to a controller (7).
4. The disposable esophageal stent system according to claim 3, characterized in that: A plurality of densely arranged friction protrusions (12) are provided on the inner ring side wall of the rotating ring (11), and each of the friction protrusions (12) is made of rubber material.
5. The disposable esophageal stent system according to claim 4, characterized in that: A transparent cover (20) is installed at the tip of the guide head (1), a camera (18) is installed inside the transparent cover (20), and the camera (18) is electrically connected to the controller (7).
6. The disposable esophageal stent system according to claim 5, characterized in that: The guide head (1) is arranged in a shuttle shape.
7. The disposable esophageal stent system according to claim 6, characterized in that: The controller (7) is provided with a stent twisting posture recognition unit, and the stent twisting posture recognition unit is used to recognize whether the stent has a twisting posture in the human body.
8. The disposable esophageal stent system according to claim 7, characterized in that: The method for establishing the support torsion posture recognition unit includes: S1: Obtain a large number of stent torsion action image samples; S2: marking key points of the stent in the stent torsion motion image sample to obtain a marked stent torsion motion image sample; S3: Based on the labeled bracket twisting action image samples and annotation information, a bracket twisting posture recognition unit is trained.
9. The disposable esophageal stent system according to claim 8, characterized in that: The key points of the support include: reference key points for locating the support parts, and extended key points that cooperate with the reference key points to represent multiple three-dimensional postures of the parts to which they belong.
10. The disposable esophageal stent system according to claim 9, characterized in that: In S3, during training, the input information is divided into a test set and a training set. After the training, the validity of the model is verified in the test set. If the verification fails, the process goes to S2 to add more labeled data; if the verification passes, the training ends.