Thread catcher under shoulder arthroscopy
By designing a suture catcher for shoulder arthroscopy, which uses elastic silk threads to form a loop, the problem of difficult PDS suture retrieval was solved, achieving fast and accurate suture retrieval, reducing surgical time and the risk of cartilage damage.
Patent Information
- Application Number
- CN202422815766.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-11-19
AI Technical Summary
In existing techniques, during arthroscopic rotator cuff repair, it is difficult to grasp the PDS suture, leading to prolonged operation time and an increased risk of articular cartilage damage.
Design a suture catcher for shoulder arthroscopy, including a handle, a sliding rod, a metal tube, and an elastic suture. The elastic suture forms a loop, which accurately catches the PDS suture through the puncture tip, reducing the frequency of changing the observation approach.
It improves the accuracy and speed of PDS suture acquisition, shortens the operation time, and reduces the risk of articular cartilage damage.
Smart Images
Figure CN223585976U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, specifically to a suture catcher for shoulder arthroscopy. Background Technology
[0002] Shoulder pain is a common degenerative condition among middle-aged and elderly people, with a prevalence of 2.4%-26%, while rotator cuff tears (RCTs) account for 17%-41% of shoulder pain cases. Rotator cuff tears account for approximately 50%-85% of shoulder diseases treated by clinicians.
[0003] Rotator cuff injuries can be classified into partial tears and full-thickness tears based on the thickness of the tear. Full-thickness tears are further classified into four categories based on tear width: <1cm is a small tear, 1-3cm is a medium tear, 3-5cm is a large tear, and >5cm is a giant tear.
[0004] For full-thickness rotator cuff tears, rotator cuff repair is currently the best clinical treatment option. The surgical techniques for rotator cuff repair have evolved from open surgery to arthroscopic-assisted small-incision surgery and finally to arthroscopic repair. The initial open approach is rarely used now due to its significant tissue damage and numerous complications. Arthroscopic rotator cuff repair has become the preferred surgical treatment for rotator cuff injuries, offering advantages such as minimal intraoperative trauma, rapid postoperative recovery, and a low complication rate.
[0005] Currently, arthroscopic rotator cuff repair commonly uses suture anchor repair techniques. However, when repairing small tears (<1cm) with relatively good tendon quality, the narrowness of the rotator cuff injury site and the significant elasticity of the rotator cuff tissue during small RCT suturing can cause the tear to shrink and collapse into an irregular channel approximately 8mm in length (footprint width) after thorough cleaning of the injury and diseased tissue. Furthermore, the sutures obscure the channel opening after inserting the suture anchor, making it impossible to directly observe the intra-articular capsule through this channel from various subacromial observation approaches. When using a suture passer to suture the injury site in full thickness, the suturing angle often limits the direct exit of the PDS suture (polydioxanone suture) after passing through the rotator cuff tissue; instead, the PDS suture must be pushed into the joint capsule. Therefore, in routine surgery, only blind grasping of the PDS suture with suture forceps is possible without a field of vision. Repeated unsuccessful attempts necessitate changing the observation approach to the joint capsule for direct visualization and suture grasping. This repeated blind grasping and changes in observation approach can prolong the operation time and cause damage to the articular cartilage.
[0006] Therefore, there is an urgent need to develop a device that can more quickly and accurately grasp PDS lines when there is no field of view. Utility Model Content
[0007] The purpose of this invention is to provide a suture catcher for shoulder arthroscopy to solve or alleviate the problems existing in the prior art, or at least provide a beneficial alternative.
[0008] To achieve the above objectives, the present invention provides the following technical solution:
[0009] This utility model provides a suture catcher for shoulder arthroscopy, including a handle, a sliding rod, a metal tube and an elastic suture, wherein the handle has an axial hole in its main body and a groove on its side, the groove communicating with the axial hole;
[0010] The sliding rod is slidably inserted into the shaft hole;
[0011] The metal tube includes a straight section and a curved section with connected lumens. The end of the curved section is provided with a puncture tip, and the side near the puncture tip is provided with an outlet that connects to the lumen. The metal tube is connected to the end face of the handle through the straight section, and the lumen of the straight section connects to the axial hole.
[0012] One end of the elastic thread is connected to the curved section of the tube near the puncture tip, and the other end passes through the outlet and the lumen of the metal tube and is connected to one end of the sliding rod.
[0013] Preferably, the sliding rod is connected to a push-pull protrusion for assisting in moving the sliding rod, and the push-pull protrusion is located in a groove.
[0014] Preferably, the outer peripheral surface of the sliding rod is provided with color-coded segments for identifying the degree of movement of the sliding rod.
[0015] Preferably, the diameter of the sliding rod is larger than the diameter of the lumen of the metal tube.
[0016] Preferably, the handle has a scale on the outside near the lower edge of the groove for indicating the distance the sliding rod moves.
[0017] Preferably, the centerline of the straight pipe section coincides with the centerline of the axial hole.
[0018] Preferably, the end face of the bent pipe section is an arc-shaped surface.
[0019] Preferably, the groove is oriented in the direction of the bend in the pipe section.
[0020] Preferably, the length of the groove is less than the length of the sliding rod.
[0021] Preferably, the length of the groove is greater than the length of the elastic thread, and the elastic thread can be tightly attached to the end of the bent pipe section by pushing the sliding rod through the groove once.
[0022] Preferably, the tip of the puncture tip has an arc angle of 20° to 40°.
[0023] Preferably, the tip of the puncture tip has a 30° arc angle.
[0024] Preferably, the portion of the elastic thread near the bend is pre-formed into a ring, which can be fully unfolded to form a near-circular collar after the push-pull protrusion is pushed out, providing a larger coverage area and enabling more efficient gripping of PDS lines.
[0025] Preferably, the elastic wire is made of nickel-titanium shape memory alloy wire.
[0026] Due to the adoption of the above technical solutions, the advantages of this utility model are as follows:
[0027] 1. The suture catcher provided by this utility model can place the loop formed by the elastic suture into the pre-suture site when there is no field of vision. Since the area of the loop formed by the unfolding of the elastic suture can cover most of the rotator cuff joint capsule side, it can complete the suture catch process more reliably and quickly than the suture catcher. There is no need to repeatedly change the observation approach, and the PDS suture can be caught more accurately, shortening the operation time, reducing the frequency of changing the observation approach, and helping to avoid damage to the articular cartilage.
[0028] 2. This utility model designs the puncture tip with a 30° arc angle, which makes it easier for the inserted elastic thread to spread out more parallel to the shoulder and sleeve shape. One end of the elastic thread extending out and forming a loop is fixed to one side of the tip, and the outlet is placed on the other side, thereby controlling the direction of the loop spreading out.
[0029] 3. This utility model has a simple structure and is easy to use. Attached Figure Description
[0030] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0031] Figure 1 This is a front view schematic diagram of the suture catcher under shoulder arthroscopy provided in an embodiment of the present invention;
[0032] Figure 2 for Figure 1 Enlarged view of point A;
[0033] Figure 3 for Figure 1 A top-down view;
[0034] Figure 4 for Figure 3 Enlarged view of point A;
[0035] Figure 5 To be Figure 1 A schematic diagram showing the state of the sliding rod in the provided arthroscopic suture catcher after it has been pushed to the left end of the groove.
[0036] Figure 6 This is a schematic diagram illustrating the usage of this utility model in minor rotator cuff repair surgery.
[0037] In the image: 1. Clavicle; 2. Supraspinatus tendon; 3. Acromion; 4. Small rotator cuff tear; 5. Humerus; 6. Long head tendon of biceps brachii; 7. Thread catcher; 8. Polydioxanone suture; 10. Handle; 11. Pivot hole; 12. Groove; 13. Scale; 20. Sliding rod; 21. Push-pull protrusion; 22. Color-coded segment; 30. Metal tube; 31. Puncture tip; 32. Curved surface; 33. Thread exit; 34. Lumen; 40. Elastic suture; 41. Loop; 42. Fixation segment; 100. Thread catcher under shoulder arthroscopy. Detailed Implementation
[0038] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," "outer," "left," "right," "front," and "rear" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0039] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.
[0040] The specific implementation method is described below:
[0041] This utility model provides an embodiment of a suture catcher for shoulder arthroscopy, see [link to embodiment]. Figure 1 , Figure 3 , Figure 5 It includes a handle 10, a sliding rod 20, a metal tube 30, and an elastic wire 40, wherein,
[0042] The handle 10 has an axially oriented central hole 11 and a groove 12 on its side. The groove 12 is connected to the central hole 11. The length of the groove 12 is less than the length of the sliding rod 20. A scale 13 is provided on the outside of the handle 10 near the lower edge of the groove 12.
[0043] The metal tube 30 includes a straight section and a bent section connected to a lumen 34. The end of the bent section has a 30° arc-shaped puncture tip 31, and an outlet 33 connecting to the lumen 34 is located on the side near the puncture tip 31. The bent section bends towards the groove 12. The metal tube 30 is connected to the end face of the handle 10 via the straight section, and the axis of the straight section coincides with the axis of the central hole 11. (See [reference]). Figure 1 , Figure 2 , Figure 3 , Figure 4 .
[0044] A color mark section 22 is provided in the middle of the outer peripheral surface of the sliding rod 20. A push-pull protrusion 21 is welded to the right end of the outer peripheral surface of the sliding rod 20 near the color mark section 22. The push-pull protrusion 21 is located in a groove. The sliding rod 20 is slidably inserted into the axial hole 11. The diameter of the sliding rod 20 is larger than the diameter of the metal tube 30. Pushing the push-pull protrusion 21 can make the elastic wire 40 fit tightly against the end of the bent tube section. See Figure 1 , Figure 3 , Figure 5 .
[0045] One end of the elastic thread 40 is connected to the curved section of the tube near the puncture tip 31, and the other end passes through the outlet 33 and the lumen 34 of the metal tube 30 before being connected to one end of the sliding rod 20. (See also...) Figure 1 , Figure 2 , Figure 3 , Figure 4 .
[0046] In this embodiment, the sliding rod 20 is made of polypropylene plastic rod; the handle 10 and the metal tube 30 are made of stainless steel, the handle has a diameter of 10mm, a length of 80mm, an inner diameter of 5mm for the shaft hole 11, a groove 12 on the handle with a depth of 4mm and a length of 30mm, and the metal tube has an outer diameter of 4mm, an inner diameter of 2mm, and a length of 140mm; the elastic wire 40 is made of 0.25mm diameter nickel-titanium shape memory alloy wire, and the portion of the elastic wire 40 near the bend section is pre-formed into a ring.
[0047] This invention is used in rotator cuff repair surgery. When using a suture passer to suture the damaged area in full thickness, the hand holds the handle 10 and pre-inserts the puncture tip 31 into the suture site. Then, the fingers push and pull the protrusion 21 forward, so that the elastic nickel-titanium memory alloy suture is pushed out of the lumen 34 from the suture outlet 33. Due to its own elasticity, the nickel-titanium memory alloy suture extends to form a loop 41 covering the puncture site. When the suture passer punctures the suture site, the PDS suture can be pushed into the loop 41. Finally, the loop 41 can be pulled out, or the fingers can be pushed and pulled back on the protrusion 21 and then the loop 41 can be pulled out to complete the grasping of the PDS suture.
[0048] The above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is impossible to exhaustively list all possible implementations here. All obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.
Claims
1. A suture catcher (100) for shoulder arthroscopy, characterized in that: Includes a handle (10), a sliding rod (20), a metal tube (30), and an elastic wire (40), wherein, The handle (10) has an axial hole (11) on its main body and a groove (12) on its side, the groove (12) being connected to the axial hole (11). The sliding rod (20) is slidably inserted into the shaft hole (11); The metal tube (30) includes a straight section and a curved section connected by a lumen (34). The end of the curved section is provided with a puncture tip (31), and the side near the puncture tip (31) is provided with an outlet (33) that connects to the lumen (34). The metal tube (30) is connected to the end face of the handle (10) through the straight section, and the lumen (34) of the straight section is connected to the axial hole (11). One end of the elastic thread (40) is connected to the curved section near the puncture tip (31), and the other end passes through the outlet (33) and the lumen (34) of the metal tube (30) and is connected to one end of the sliding rod (20).
2. The arthroscopic suture catcher (100) as described in claim 1, characterized in that: A push-pull protrusion (21) is connected to the sliding rod (20), and the push-pull protrusion (21) is located in the groove (12).
3. The arthroscopic suture catcher (100) as described in claim 1 or 2, characterized in that: The outer circumferential surface of the sliding rod (20) is provided with a color mark segment (22).
4. The arthroscopic suture catcher (100) as described in claim 3, characterized in that: The diameter of the sliding rod (20) is larger than the diameter of the lumen (34) of the metal tube (30).
5. The arthroscopic suture catcher (100) as described in claim 1, characterized in that: A scale (13) is provided on the outside of the handle (10) near the lower edge of the groove (12).
6. The arthroscopic suture catcher (100) as described in claim 1, characterized in that: The centerline of the straight pipe section coincides with the centerline of the axial hole (11).
7. The arthroscopic suture catcher (100) as described in claim 1, characterized in that: The end face of the bent pipe section is an arc-shaped surface.
8. The arthroscopic suture catcher (100) as described in claim 1, characterized in that: The groove (12) is oriented in the direction of the bend in the pipe section.
9. The arthroscopic suture catcher (100) as described in claim 1, characterized in that: The length of the groove (12) is less than the length of the sliding rod (20).
10. The arthroscopic suture catcher (100) as described in claim 1, characterized in that: The elastic filament (40) is made of nickel-titanium shape memory alloy.