Visual intracavitary built-in esophageal stent releaser
By incorporating optical fibers and damping rings into the esophageal stent release device, the problems of inaccurate stent placement and operational risks in narrow digestive tracts are solved, achieving precise stent release and improved safety.
Patent Information
- Application Number
- CN202422437989.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-10
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2034-10-10
AI Technical Summary
Existing endoscopic stent placement techniques are difficult to perform in narrow digestive tracts, posing risks of perforation and bleeding, and the stent placement position is inaccurate. Existing equipment is also limited by radiation and insufficient damping.
A visualized, in-cavity esophageal stent release device was designed. An optical fiber is embedded in the inner tube to provide real-time illumination and status monitoring. Combined with a damping ring structure, it prevents stent movement and ensures accurate release.
It enables precise stent deployment in narrow digestive tracts, reduces the risk of perforation and bleeding, avoids the effects of radiation, and improves the safety and accuracy of the procedure.
Smart Images
Figure CN223773907U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, specifically to a visualized intracavitary esophageal stent release device. Background Technology
[0002] Patients with advanced esophageal cancer often have malignant obstruction, which often leads to poor prognosis due to malnutrition, intestinal obstruction, etc. Endoscopic stent placement can relieve obstruction to a large extent and effectively improve the patient's quality of life and prognosis.
[0003] Existing endoscopic stent placement techniques have drawbacks:
[0004] Firstly, some malignant obstructions of the digestive tract often result in severe stenosis, making it difficult to determine the course of the digestive tract and leading to difficulties in endoscopic procedures. In such cases, directly releasing the stent along the guidewire may increase the risk of complications such as perforation and bleeding. To address this shortcoming, one existing approach is to measure the distance to the upper edge of the stent and release it directly. However, this method suffers from errors in distance estimation and the inability to assess the stent's deployment status in real time. Another approach is to confirm the stent's position under X-ray fluoroscopy and determine whether it covers both sides of the stenotic segment. While this method increases the success rate of stent placement, the radiation exposure may affect the physician's health, and it is also limited by the requirements of the machines and equipment.
[0005] Secondly, during the release process, the damping component used to fix the stent may not provide sufficient damping, which could cause the stent to move along with the outer tube of the release device during release, resulting in inaccurate release position of the stent and thus failure of stent placement. Utility Model Content
[0006] The purpose of this invention is to provide a visualized intracavitary esophageal stent release device to solve the problems mentioned in the background art.
[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution:
[0008] An esophageal stent release device with visualization cavity implantation includes an outer tube and an inner tube, the inner tube passing through the outer tube, one end of the inner tube being connected to a traction head and the other end being connected to an inner tube handle, and the end of the outer tube opposite to the traction head being connected to the outer tube handle.
[0009] The difference between this device and traditional release devices is that an optical fiber is embedded in the inner tube. One end of the optical fiber extends to the traction head, and the other end extends into the inner tube handle. This allows the optical fiber to provide light to the affected area and also to obtain the condition of the affected area in real time. This avoids the defects of incorrect position estimation, as well as the defects of radiation and equipment limitations.
[0010] Preferably, an interface can also be placed inside the inner tube handle to connect the optical fiber to the interface. Through this interface and cable, it can also be connected to devices such as controllers and displays, thereby facilitating the control of the optical fiber's conduction and data transmission.
[0011] Preferably, a clearance groove is formed in the middle of the traction head, and the optical fiber extends to the clearance groove so that the optical path through the optical fiber can be directed to the end of the traction head away from the inner tube.
[0012] The advantage of setting up an obstacle avoidance groove is that the obstacle avoidance groove is to prevent part of the structure of the traction head from blocking the optical fiber's optical path, ensuring that the optical path can reach the affected area normally.
[0013] Preferably, a damping ring is fitted on the inner tube. The damping ring includes an annular body and a plurality of elastic bodies spaced apart circumferentially along the annular body. The farthest ends of the plurality of elastic bodies are formed on a circle, the radius R of which is greater than the inner diameter r of the outer tube.
[0014] The advantage of this type of elastomer structure is that the elastomer is compressed inside the outer tube, generating a restorative deformation force. This force acts on the release stent, providing considerable damping and preventing the release stent from shifting when the outer tube moves relative to it, thus ensuring that the release stent is released at the affected area.
[0015] Preferably, the annular body extends along its axial direction with a tapered section, which causes one end of the damping ring to have a tendency to contract, which can assist in the installation of the release bracket.
[0016] Preferably, the elastomer has an L-shaped structure, with one end of the L-shaped structure integrally formed with the annular body and the other end being a free end;
[0017] The advantages of the L-shaped elastomer are: its lateral side increases the contact area with the support, thereby increasing the frictional resistance and further preventing movement; and this end is a free end with no connection to the annular body, leaving space for deformation.
[0018] Preferably, the elastomer has a triangular structure, with one side of the triangular structure integrally formed with the annular body, so that a compression space is formed between the triangular structure and the annular body.
[0019] The advantages of triangular elastomers are: the middle part of the triangular structure forms a compression space, which reserves space for the deformation of the triangular structure, and the triangular structure is relatively stable and can stably provide the support with the force to restore deformation. Attached Figure Description
[0020] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0021] Figure 1 This is a front view of a visually implanted esophageal stent release device according to an embodiment of this utility model;
[0022] Figure 2 This is a detailed diagram showing the state of the esophageal stent release device with a visualized cavity in an embodiment of this utility model.
[0023] Figure 3 This is an embodiment of the present utility model. Figure 2 Exploded view;
[0024] Figure 4 This is a side view of the damping ring in an embodiment of this utility model;
[0025] Figure 5 This is a front view of one embodiment of the damping ring in this utility model.
[0026] Figure 6 This is a front view of another embodiment of the damping ring in this utility model;
[0027] In the picture:
[0028] Outer tube 1;
[0029] Inner tube 2;
[0030] Traction head 3, clearance groove 31;
[0031] Inner tube handle 4;
[0032] Outer tube handle 5;
[0033] Fiber optic 6;
[0034] Damping rings 7a and 7b, annular body 71a and 71b, elastic body 72a and 72b, conical segment 73a and 73b, compression space 74b;
[0035] Angiography point 8. Detailed Implementation
[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0037] Example: This example provides an optimal implementation scheme for a visualized intracavitary esophageal stent release device, combined with the attached... Figure 1 ~Attached Figure 6 Detailed explanation.
[0038] Please see the appendix Figure 1 A front view of the stent release device. This stent release device includes an outer tube 1 and an inner tube 2. The inner tube 2 penetrates the outer tube 1. The outer tube 1 can be displaced relative to the inner tube 2, thereby exposing the esophageal stent made of shape memory metal installed between the outer tube 1 and the inner tube 2. Figure 1 In the state shown, the esophageal stent is compressed and installed in the interlayer between the outer tube 1 and the inner tube 2;
[0039] During stent release, the stent release device needs to be inserted through an endoscope. A guide wire is used to pass through the inner tube 2 to guide the stent release device to the affected area. Then, the outer tube 1 is displaced relative to the inner tube 2 to expose the esophageal stent. The esophageal stent automatically expands to provide support for the affected area.
[0040] Please continue reading the appendix. Figure 1 One end of the inner tube 2 is connected to the traction head 3, and the other end is connected to the inner tube handle 4. The traction head 3 has better guiding properties than the outer tube 1 and the inner tube 2, while the inner tube handle 4 is for easy gripping.
[0041] Please continue reading the appendix. Figure 1 The outer tube 1 is connected to the outer tube handle 5 at the end opposite to the traction head 3. Specifically, the outer tube handle 5 is located in the middle of the inner tube 2, which is also for easy gripping.
[0042] For details, please see the appendix. Figure 2 The image shows a detailed view of the outer tube 1 being displaced to expose the esophageal stent G fitted on the inner tube 2. The specific operation involves grasping the inner tube handle 4 and the outer tube handle 5 respectively, and applying force to the outer tube handle 5 to displace the outer tube 1.
[0043] Please see the appendix Figure 2 It is attached Figure 2 The exploded view shows the esophageal stent G detached from the inner tube 2, by the attached... Figure 3 The inner tube 2 contains an optical fiber 6 (shown by the dotted line), with one end of the optical fiber 6 extending to the traction head 3 and the other end extending into the inner tube handle 4.
[0044] Specifically, the optical fiber 6 is integrally formed and installed inside the inner tube 2. In this embodiment, there are two optical fibers 6, which are distributed along the circumference of the inner tube 2. In other embodiments, there may be multiple optical fibers 6 in addition to two.
[0045] In some other embodiments, the handle 4 is also equipped with an interface that can connect the optical fiber to the controller and display screen by inserting a plug and cable, or to a mobile phone and a computer, so as to facilitate the operation of the optical fiber and view the real-time status.
[0046] Please continue reading the appendix. Figure 3A clearance groove 31 is formed in the middle of the traction head 3. There are two clearance grooves 31, which are arranged along the circumference of the traction head 3 and correspond one-to-one with the optical fiber 6, so that the optical fiber 6 extends to the clearance groove 31, and the light path through the optical fiber 6 can be directed to the end of the traction head 3 away from the inner tube 2.
[0047] Specifically, the clearance groove 31 is formed as follows: the traction head 3 is a conical structure, and starting from the middle of the conical structure, it is recessed in a direction parallel to the axis of the conical structure, so that the optical path emitted by the optical fiber is not obstructed by the traction head 3.
[0048] Please continue reading the appendix. Figure 3 The inner tube 2 is fitted with damping rings 7a and 7b and several contrast points 8. There are two damping rings 7a and 7b, which correspond to the two ends of the esophageal stent G respectively, to form a damping effect on the esophageal stent G and prevent the esophageal stent G from moving with the outer tube 1. The contrast points 8 are for easy imaging to help doctors determine the specific position of the esophageal stent G.
[0049] Please see the appendix Figure 4 The damping rings 7a and 7b include annular bodies 71a and 71b and a plurality of elastic bodies 72a and 72b spaced circumferentially along the annular bodies 71a and 71b. The annular bodies 71a and 71b are used to be sleeved on the inner tube 2 and fixed to the inner tube 2. The elastic bodies 72a and 72b are used to form a damping effect on the esophageal stent G.
[0050] Please see the appendix Figure 5 In one embodiment of the damping ring 7a, the farthest ends of a plurality of elastic bodies 72a of the damping ring 7a are formed on a circle Oa, the radius R1 of the circle Oa being greater than the inner diameter r1 of the outer tube 1; thus, the elastic body 72a is deformed by the pressure of the outer tube 1, thereby generating an elastic deformation force to act on the esophageal stent G.
[0051] Accordingly, please refer to the appendix. Figure 6 In one embodiment of the damping ring 7b, the farthest ends of a plurality of elastic bodies 72b of the damping ring 7b are formed on a circle Ob, and the radius R2 of the circle Ob is greater than the inner diameter r2 of the outer tube 1.
[0052] Please continue reading the appendix. Figure 4 The annular bodies 71a and 71b extend along their axial direction and have tapered segments 73a and 73b. The tapered segments 73a and 73b contract from the end close to the annular bodies 71a and 71b to the end away from the annular bodies 71a and 71b, thereby facilitating the placement of the esophageal stent G.
[0053] Please continue reading the appendix. Figure 5 In the embodiment of the damping ring 7a, the elastic body 72a has an L-shaped structure, one end of which is integrally formed with the annular body 71a, and the other end is a free end.
[0054] Please continue reading the appendix. Figure 5 In the embodiment of the damping ring 7b, the elastic body 72b has a triangular structure, one side of which is integrally formed with the annular body 71b, so that a compression space 74b is formed between the triangular structure and the annular body 71b.
[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0056] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A visualized intracavitary esophageal stent release device, characterized in that, It includes an outer tube and an inner tube, the inner tube passing through the outer tube, one end of the inner tube being connected to a traction head, and the other end being connected to an inner tube handle, the end of the outer tube opposite to the traction head being connected to the outer tube handle, and an optical fiber being embedded in the inner tube, one end of the optical fiber extending through the traction head, and the other end extending into the inner tube handle.
2. The esophageal stent release device with visual cavity implantation according to claim 1, characterized in that: A clearance groove is formed in the middle of the traction head, and the optical fiber extends to the clearance groove so that the optical path passing through the optical fiber can be directed to the end of the traction head away from the inner tube.
3. The esophageal stent release device with visual cavity implantation according to claim 1 or 2, characterized in that: A damping ring is fitted onto the inner tube. The damping ring includes an annular body and a plurality of elastic bodies spaced circumferentially along the annular body. The farthest ends of the plurality of elastic bodies are formed on a circle, the radius R of which is greater than the inner diameter r of the outer tube.
4. The esophageal stent release device with visual cavity implantation according to claim 3, characterized in that: The annular body has a tapered segment extending along its axial direction.
5. The esophageal stent release device with visual cavity implantation according to claim 3, characterized in that: The elastomer has an L-shaped structure, with one end of the L-shaped structure integrally formed with the annular body and the other end being a free end.
6. The esophageal stent release device with visual cavity implantation according to claim 3, characterized in that: The elastomer has a triangular structure, with one side of the triangular structure integrally formed with the annular body, creating a compression space between the triangular structure and the annular body.