Locator for rotator cuff suture anchor
By designing a rotator cuff suture anchor locator and using a positioning sleeve and an inclined observation window, the problems of inconsistent lines and soft tissue entanglement during anchor implantation were solved, and the stability and safety of the anchor were achieved.
Patent Information
- Application Number
- CN202422838630.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-11-21
AI Technical Summary
In the prior art, when the anchor is implanted, the anchoring pattern is inconsistent with the tapping pattern, and the anchor is easily entangled with soft tissue, resulting in insufficient implant strength or abnormal healing.
A rotator cuff suture anchor locator was designed, including a positioning sleeve and a handle. The inner diameter of the positioning sleeve was slightly larger than the anchor, and an inclined observation window was provided at the bottom to guide the anchor implantation and isolate the soft tissue, ensuring the consistency of the anchoring pattern and avoiding soft tissue entanglement.
The stability and firmness of the anchor implantation are achieved, abnormal healing caused by anchor loosening and soft tissue entanglement is avoided, and the precision and safety of the anchor implantation are ensured.
Smart Images
Figure CN223311205U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a rotator cuff suture anchor positioner. Background Art
[0002] The rotator cuff, also known as the tendon cuff or rotator cuff, is composed of the tendons of the supraspinatus, infraspinatus, teres minor, and subscapularis muscles, which originate from the scapula and insert at the upper end of the humerus. These four tendons adhere to the shoulder capsule as they pass superiorly, posteriorly, and anteriorly across the shoulder joint, interconnecting to form a nearly circular tendon plate that surrounds the shoulder joint and plays a crucial role in shoulder stability. Rotator cuff rupture is one of the most common shoulder injuries, typically avulsing from the bone. Currently, the mainstream surgical approach for rotator cuff tears is arthroscopic repair and reconstruction using wire anchors. During repair, the rotator cuff cannot be directly sutured to the bone; instead, a wire anchor is used to secure it. This type of anchor is called a wire anchor. In the case of a rotator cuff tear, the wire anchor is first implanted into the bone, at the site of the rotator cuff's attachment to the greater tuberosity of the humerus. The wire at the end of the anchor is then passed through the torn rotator cuff tissue stump and tied with a knot to secure the rotator cuff to the bone, achieving the desired repair. When inserting an anchor, a small incision of approximately 6 mm is first made in the shoulder to be operated on. A tap is then used to pre-drill the groove, the tap is removed, and the anchor is finally inserted along the groove. However, anchor insertion is prone to false tracks, where the implant path does not align with the pre-drilled path, leading to decreased fixation strength or even loosening. The anchor can also become entangled with soft tissue, causing it to embed into the bone during implantation and resulting in abnormal healing. Utility Model Content
[0003] In response to the problems existing in the above-mentioned prior art, the present invention aims to provide a rotator cuff suture anchor locator to solve the problem that the anchoring pattern of the anchor cannot be consistent with the pre-tapping pattern of the tap during implantation, and that the anchor will entangle certain soft tissues during implantation, causing soft tissue to be embedded in the bone canal and abnormal healing.
[0004] In order to achieve the above-mentioned purpose, the utility model proposes a rotator cuff suture anchor locator, including a positioning sleeve for a tap and an anchor to pass smoothly through, the positioning sleeve including a barrel section and a handle located on the upper side of the barrel section, the inner diameter of the barrel section is 0.1-0.2 mm larger than the diameter of the anchor, and an inclined surface is provided on one side of the bottom end of the barrel section to form an observation window, the inclination angle of the inclined surface is 35°-45°, and the projected area of the inclined surface does not exceed 2 / 3 of the bottom area of the barrel section.
[0005] When the lower end of the locator is implanted in the shoulder joint for positioning, the inclined surface of the barrel section is exactly located in the small opening (the top of the inclined surface is exactly located at the top of the small opening), and the pre-attack and anchoring conditions can be observed from both ends of the opening. At the same time, it can also isolate soft tissue and avoid soft tissue entanglement.
[0006] In the above scheme: the positioning sleeve also includes a barrel mouth section located above the barrel body section, the inner diameter of the barrel mouth section is larger than the barrel body section, the barrel mouth section and the barrel body section are connected by a conical transition section, and the handle is fixed on the outer wall of the barrel mouth section. The structure is simple and it is convenient to insert the tap and anchor nail.
[0007] In the above solution, one end of the handle is provided with a sleeve that can be sleeved on the barrel section, and the handle is sleeved on the upper part of the barrel section through the sleeve, which has a simple structure and is easy to assemble.
[0008] In the above solution, the outer diameter of the barrel section is 5.9-6.0 mm, and the wall thickness of the barrel section is 0.15-0.25 mm. This size causes very little damage to tissues.
[0009] In the above solution, the diameter of the tap is 0.4-0.5 mm smaller than the diameter of the anchor. The tap is used to pre-tap the groove, so it needs to be smaller than the diameter of the anchor.
[0010] In the above solution, the end of the handle away from the barrel section is provided with anti-slip grooves, and the handle is provided to facilitate hand-holding and fixing the positioner, and the anti-slip grooves play a role in preventing the hand from slipping.
[0011] In the above solution, the projected area of the inclined surface is 2 / 3 of the bottom surface area of the barrel section, the observation window is of appropriate size, and the observation effect is good.
[0012] The beneficial effects of the utility model are:
[0013] 1. During anchor implantation, the anchor is anchored along the tap trajectory through this locator. The anchoring pattern aligns with the tap pattern, providing a precise fit and excellent security. This prevents insufficient anchor strength, which can lead to subsequent loosening. It also prevents the anchor from becoming entangled with soft tissue during implantation, which can cause soft tissue to become embedded in the bone canal and cause healing abnormalities. 2. This locator features an inclined observation window, allowing observation of the tap pre-tap depth and direction to prevent any anomalies. It also allows for verification of the proper direction and depth of the anchor during implantation. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0015] Figure 1 It is a structural diagram of the present utility model. DETAILED DESCRIPTION
[0016] like Figure 1 As shown, a rotator cuff suture anchor positioner is mainly composed of a tap 1 and a positioning sleeve 2 for the anchor to pass smoothly. The positioning sleeve 2 includes a barrel section 22 and a handle 3 located on the upper side of the barrel section 22.
[0017] The inner diameter of the barrel section 22 is 0.1-0.2 mm larger than the diameter of the anchor nail. A slope 4 is provided on one side of the bottom end of the barrel section 22 to form an observation window. The inclination angle of the slope 4 is 35°-45°, and the projected area of the slope 4 does not exceed 2 / 3 of the bottom area of the barrel section 22.
[0018] Specifically, the positioning sleeve 2 can be constructed in two structural forms.
[0019] One structural configuration involves positioning sleeve 2 further comprising a mouth section 21 positioned above body section 22. The inner diameter of mouth section 21 is larger than that of body section 22, and mouth section 21 and body section 22 are connected by a tapered transition section. Handle 3 is secured to the outer wall of mouth section 21. This simple structure facilitates insertion of tap 1 and anchor. With this structural configuration, the total length of positioning sleeve 2 is 80-100 mm, with body section 22 being 70-80 mm long. This achieves excellent positioning performance.
[0020] Another structural mode is: one end of the handle 3 is provided with a sleeve that can be mounted on the barrel section 22, and the handle 3 is mounted on the upper part of the barrel section 22 through the sleeve, which has a simple structure and is easy to assemble. Under this structural mode, the length of the barrel section 22 is 80-100mm.
[0021] In any structural mode, the outer diameter of the barrel section 22 is 5.9-6.0 mm, and the wall thickness of the barrel section 22 is 0.15-0.25 mm. This size causes very little damage to tissues.
[0022] The diameter of tap 1 is 0.4-0.5mm smaller than the diameter of the anchor. Tap 1 is used to pre-tap the groove, so it needs to be smaller than the diameter of the anchor. Specifically, the diameter of tap 1 is 5.0mm, and the diameter of the anchor is 5.5mm.
[0023] Preferably, the projection area of the inclined surface 4 is 2 / 3 of the bottom area of the barrel section 22, and the observation window is of appropriate size, so that the observation effect is good.
[0024] The steps of using the utility model are:
[0025] First, make a 6.0 mm incision on the shoulder where surgery is to be performed, implant the lower end of the locator into the shoulder joint to determine the anchoring implantation point (when the locator is implanted, the inclined surface of the barrel section 22 is exactly located in the small incision (the top of the inclined surface is exactly located at the top of the small incision), and the pre-tap and anchoring conditions are observed from both ends of the opening. It can also isolate the soft tissue and avoid the entanglement of the soft tissue). Fix the locator with the handle 3, use a 5.0 mm tap 1 to pre-tap the groove, withdraw the tap 1, and then implant a 5.5 mm anchor along the sleeve channel of the locator. After confirming that the anchor is implanted, withdraw the locator.
Claims
1. A rotator cuff suture anchor positioner, characterized in that: The invention comprises a positioning sleeve (2) for allowing a tap (1) and an anchor to pass smoothly through, the positioning sleeve (2) comprising a barrel section (22) and a handle (3) located on the upper side of the barrel section (22), the inner diameter of the barrel section (22) being 0.1-0.2 mm larger than the diameter of the anchor, a bevel (4) being provided on one side of the bottom end of the barrel section (22) to form an observation window, the inclination angle of the bevel (4) being 35°-45°, and the projected area of the bevel (4) not exceeding 2 / 3 of the bottom area of the barrel section (22).
2. The rotator cuff suture anchor positioner according to claim 1, characterized in that: The positioning sleeve (2) further comprises a barrel mouth section (21) located above the barrel body section (22); the barrel mouth section (21) has an inner diameter larger than that of the barrel body section (22); the barrel mouth section (21) and the barrel body section (22) are connected via a conical transition section; and the handle (3) is fixed on the outer wall of the barrel mouth section (21).
3. The rotator cuff suture anchor positioner according to claim 1, characterized in that: One end of the handle (3) is provided with a sleeve that can be sleeved on the barrel section (22), and the handle (3) is sleeved on the upper part of the barrel section (22) through the sleeve.
4. The rotator cuff suture anchor positioner according to claim 1, wherein: The outer diameter of the barrel section (22) is 5.9-6.0 mm, and the wall thickness of the barrel section (22) is 0.15-0.25 mm.
5. The rotator cuff suture anchor positioner according to claim 4, characterized in that: The diameter of the tap (1) is 0.4-0.5 mm smaller than the diameter of the anchor.
6. The rotator cuff suture anchor positioner according to claim 1, characterized in that: An end of the handle (3) away from the barrel section (22) is provided with anti-slip grooves.
7. The rotator cuff suture anchor positioner according to claim 1, characterized in that: The projected area of the inclined surface (4) is 2 / 3 of the bottom surface area of the barrel section (22).