Disposable thread passing device
By designing a thread passer that includes a handle, hollow tube and hook, and using the brake drive connecting rod to achieve state switching of hooks, the limitations of suture delivery and retrieval are solved, the efficiency and safety of suture operation are improved, and tissue damage is reduced.
Patent Information
- Application Number
- CN202421500601.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-06-27
AI Technical Summary
Existing surgical tools have limitations in suture delivery and retrieval, resulting in additional trauma and operational complexity, and the inability to efficiently and safely complete suture operations in minimally invasive surgery.
A disposable thread passer is designed, including a handle, a hollow tube, a connecting rod and a hook. The connecting rod is driven to move within the hollow tube through a brake, realizing the retracting and extended state switching of the hook, and simplifying the capture and retrieval process of suture.
It realizes efficient capture and retrieval of sutures, reduces damage to tissue, improves the safety and efficiency of the surgery, and simplifies the operation process.
Smart Images
Figure CN223081703U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of medical devices, and particularly relates to a disposable wire passer. Background Art
[0002] Endoscopic or arthroscopic surgery is a minimally invasive surgical technique that is performed through small openings formed in the patient's body or through cannulas inserted through small incisions. This surgical approach uses an endoscope for observation, allowing the surgeon to precisely operate on the target tissue through one or more cannulas. During the surgery, the surgeon uses slender instruments that are inserted through the cannulas to achieve delicate manipulation of the tissue. With the popularity of minimally invasive surgery, the number of closed surgical procedures performed through the narrow channels within the cannulas has been increasing. In certain endoscopic and arthroscopic surgeries, a slender needle is typically used to deliver a suture through a first cannula, causing the suture to pass through the tissue. However, to retrieve the suture, special tools such as narrow grasping forceps or a slender hollow suture retriever with an internal coil must be used and operated through a second cannula. The coil can extend outside the tip of the retriever to capture the free end of the suture. The design of these tools limits them to capturing only specific portions of the suture. For example, while the forceps can grasp the middle portion of the suture, the coil of the suture retriever can only pass around the free end of the suture.
[0003] Existing surgical tools have limitations in delivering and retrieving sutures, which result in additional trauma and operational complexity during the surgery. Therefore, there is an urgent need to develop new and improved surgical tools that can achieve suture delivery and retrieval in one go, while minimizing tissue damage when the needle passes through the tissue, and improving the safety and efficiency of the surgery. Summary of the Utility Model
[0004] The utility model provides a disposable wire passer that can achieve wire passing and threading actions through one instrument, improving the suture capture efficiency.
[0005] To solve the above technical problems, the technical solution provided by the utility model is as follows:
[0006] A disposable wire passer, characterized by comprising:
[0007] A handle having a brake;
[0008] A hollow tube having a distal end, a proximal end, and a longitudinal axis extending between the distal end and the proximal end. The proximal end is connected to the handle, the distal end has an opening, and the opening is a tip structure;
[0009] A connecting rod disposed inside the hollow tube, with one end of the connecting rod drivingly connected to the brake;
[0010] A hook is connected to the other end of the connecting rod and at least a part of the hook is located inside the hollow tube. The hook includes an upper hook and a lower hook, and one ends of the upper hook and the lower hook are fixedly connected.
[0011] Wherein, the brake drives the connecting rod to move along the longitudinal axis inside the hollow tube to switch the hook between a retracted state and an extended state.
[0012] In the retracted state, the upper hook and the lower hook are at least partially retracted into the hollow tube, and the other ends of the upper hook and the lower hook overlap with each other to form a closed loop; in the extended state, the upper hook and the lower hook extend out of the hollow tube, and the other ends of the upper hook and the lower hook are separated.
[0013] Furthermore, the brake further includes a pushing component and a guiding component. The guiding component is arranged on the inner wall of the handle, and the pushing component is arranged in the handle. The pushing component moves along the longitudinal axis and is clamped with the guiding component to realize the switching between the retracted state and the extended state.
[0014] Furthermore, the pushing component includes a trigger, a pushing rod, a pushing block, a rotating block and a spring. The rotating block is rotatably sleeved outside the connecting rod. The spring is sleeved on the connecting rod, with one end abutted against the inner wall of the handle and the other end abutted against one end of the rotating block. The pushing rod is axially movably arranged in the handle, with one end fixedly connected to the pushing block and the other end connected to the trigger; a serrated first protrusion is arranged at the other end of the rotating block, and a serrated second protrusion is arranged on the pushing block. The second protrusion can match with the first protrusion.
[0015] Furthermore, the guiding component includes a plurality of deep grooves and shallow grooves arranged along the axial direction of the handle. The deep grooves and the deep grooves are alternately arranged in a ring on the inner wall of the handle, and the first protrusion can slide in the deep grooves and the shallow grooves under the push of the pushing block.
[0016] Furthermore, a boss is arranged between the deep grooves and the shallow grooves.
[0017] Furthermore, the handle includes an outer cylinder and an inner cylinder which are detachably connected and sleeved together. One end of the inner cylinder is connected to the hollow tube, and two side grooves are symmetrically arranged on both side walls at the other end; the deep grooves, the shallow grooves and the boss are arranged on the inner wall of the inner cylinder.
[0018] Further, the pushing member further includes a sleeve, which is slidably sleeved outside the inner cylinder. One end of the sleeve is fixedly connected to the trigger, and the other end is an open end, with two cross bars symmetrically arranged. The cross bars are fixedly connected to the pushing rod, and the cross bars are matched with the side grooves. The trigger is sleeved outside the inner cylinder and can move along the longitudinal axis to drive the axial movement of the pushing rod and the pushing block.
[0019] Further, the rotating block and the connecting rod are connected by a bearing.
[0020] Further, the distal end of the hollow tube is laterally bent.
[0021] Further, a wire groove is provided in the direction where the opening of the hollow tube extends towards the proximal end.
[0022] The beneficial effects of the present utility model: The present utility model provides a disposable wire passer. When performing endoscopic suture or arthroscopic suture, threading and retrieving the suture are both completed by a single instrument in one operation, avoiding the problems of inconvenient operation or excessive wound caused by using two or more instruments; The upper hook and the lower hook of the wire passer of the present utility model can be closed and separated. When separated, it is convenient to retrieve the suture. When closed and retracted into the hollow tube, the suture can be fully fixed, making it not easy to be exposed when passing through tissues, and avoiding damage or trauma to the surrounding tissues; The brake of the disposable wire passer of the present utility model enables it to complete surgical operations in a narrow environment, capture the suture more sensitively and precisely, operate labor-saving and convenient, and is not easy to jam or damage the surrounding tissues. Description of the Drawings
[0023] Figure 1 It is the overall structure diagram of the disposable wire passer of the present utility model in the state of the back hook.
[0024] Figure 2 It is the overall structure diagram of the disposable wire passer of the present utility model in the state of the out hook.
[0025] Figure 3 It is the structure diagram of the hook of the present utility model in one embodiment.
[0026] Figure 4 It is the exploded view of the wire passer of the present utility model.
[0027] Figure 5 It is the partial structure diagram of the inside of the inner cylinder of the present utility model (excluding the pushing rod, the pushing block and the sleeve).
[0028] Figure 6 It is the structure diagram of the sleeve, the pushing rod and the pushing block of the present utility model.
[0029] Figure 7 It is the structure diagram of the connecting rod and the rotating block of the present utility model.
[0030] Figure 8 This is the overall structure diagram of the inner cylinder of the present utility model;
[0031] Figure 9 This is the structure diagram of the inner wall of the inner cylinder of the present utility model.
[0032] The reference numerals include:
[0033] 100 - handle, 110 - inner cylinder, 120 - outer cylinder
[0034] 111 - side groove, 200 - hollow tube, 300 - hook
[0035] 310 - upper hook, 320 - lower hook, 400 - connecting rod
[0036] 510 - sleeve, 520 - spring, 511 - cross bar
[0037] 530 - trigger, 540 - rotating block, 550 - push rod
[0038] 560 - push block, 541 - first protrusion, 561 - second protrusion
[0039] 571 - shallow groove, 572 - deep groove, 573 - boss
[0040] 574 - first step surface, 575 - second step surface Detailed implementation manners
[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0042] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0043] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model.
[0044] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.
[0045] As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown in
[0046] Figure 1 the structure of the disposable wire passer of the present utility model mainly includes: a handle 100, a hollow tube 200, a connecting rod 400, a hook 300, and a brake disposed within the handle 100. Among them, the hollow tube 200 has a distal end and a proximal end and a longitudinal axis extending between the distal end and the proximal end. The proximal end of the hollow tube 200 is fixedly connected to the handle 100, and the distal end has an opening, and the opening is a sharp tip structure, which is convenient for piercing into human tissues. One end of the connecting rod 400 is fixedly connected to the hook 300, and the other end passes through the hollow tube 200 and is drivingly connected to the brake located within the handle 100. The brake includes a pushing component and a guiding component. The guiding component is disposed on the inner wall of the handle 100, and the pushing component is disposed at the handle 100. The pushing component moves axially along the handle 100 and engages with the guiding component to achieve the switching between the retracted state (retracting the hook) and the extended state (extending the hook) of the hook 300. At least a part of the hook 300 is located within the hollow tube 200. The hook 300 includes an upper hook 310 and a lower hook 320. One ends of the upper hook 310 and the lower hook 320 are both fixedly connected to the connecting rod 400. The brake drives the connecting rod 400 to move along the longitudinal axis within the hollow tube 200, moving the hook 300 from the retracted state to the extended state. In the retracted state, the other ends of the upper hook 310 and the lower hook 320 overlap to form a closed loop; in the extended state, the other ends of the upper hook 310 and the lower hook 320 are separated, thereby achieving retracting the hook and extending the hook. When extending the hook, it captures the suture, and when retracting the hook, it sleeves the suture without unhooking.
[0046] Specifically, as Figure 1 shown, the handle 100 includes an outer cylinder 120 and an inner cylinder 110 that are detachably connected and sleeved together. A clamping groove (not shown in the figure) is provided on the inner side of the bottom of the outer cylinder 120. One end of the inner cylinder 110 is fixedly connected to the hollow tube 200, and the other end is an open end that can match the clamping groove. As Figure 4 and Figure 8 shown, and two side grooves 111 are symmetrically provided on the side wall of the open end of the inner cylinder 110. A part of the inner cylinder 110 is located within the outer cylinder 120, and another part extends out of the outer cylinder 120 and is located outside the outer cylinder 120.
[0047] As Figure 4 、 Figure 5 and Figure 6 shown, the pushing component mainly includes a sleeve 510, a trigger 530, a push rod 550, a push block 560, a rotating block 540, and a spring 520. The sleeve 510 is a hollow tubular structure and is slidably sleeved between the inner cylinder 110 and the outer cylinder 120. One end of the sleeve 510 is fixedly connected to the trigger 530. The trigger 530 is also slidably sleeved outside the inner cylinder 110. The trigger 530 is disc-shaped, and the outer diameter of the trigger 530 is not less than the diameter of the outer cylinder 120. By pushing the trigger 530, the sleeve 510 can be driven to move along the longitudinal axis outside the inner cylinder 110. As Figure 6 shown, the other end of the sleeve 510 is an open end. Two cross bars 511 are symmetrically arranged on the inner side wall of the open end. The cross bars 511 are matched with the side grooves 111 and can move along the longitudinal axis in the side grooves 111. One end of the cross bar 511 is fixedly connected to the inner wall of the sleeve 510, and the other end is fixedly connected to the bottom end of the push rod 550. The push rod 550 is coaxially arranged inside the sleeve 510, and the upper end of the push rod 550 is fixedly connected to the push block 560. The rotating block 540 is rotatably sleeved on the connecting rod 400 through a bearing, so that the rotating block 540 can rotate relative to the connecting rod 400 but cannot slide up and down. Therefore, linear motion can be converted into axial rotational motion. The spring 520 is sleeved on the connecting rod 400. One end of the spring 520 abuts against the inner wall of the end of the inner cylinder 110 away from the side groove 111, and the other end abuts against the rotating block 540, and the spring 520 is always in a compressed state.
[0048] As Figure 5 and Figure 7 shown, the rotating block 540 is a multi-prismatic column, and a serrated first protrusion 541 is provided at the lower end. A serrated second protrusion 561 is provided on the multi-prismatic push block 560. The rotating block 540 and the push block 560 are coaxially arranged opposite to each other, and the first protrusion 541 can be matched with the second protrusion 561.
[0049] As Figure 8 and Figure 9As shown, the guiding component is arranged on the inner wall of the inner cylinder 110, mainly including a plurality of deep grooves 572 and a plurality of shallow grooves 571. The deep grooves 572 and the shallow grooves 571 are respectively arranged and extended along the longitudinal axis, and are distributed in a ring-shaped and alternately arranged manner on the inner wall of the inner cylinder 110. The bottom of the deep groove 572 is the first step surface 574, and the bottom surface of the shallow groove 571 is the second step surface 575. A boss 573 is arranged between adjacent deep grooves 572 and shallow grooves 571 to separate the two. That is, the opposite sides of adjacent bosses 573 and the corresponding first step surface 574 in the middle form the deep groove 572, and the opposite sides of adjacent bosses 573 and the corresponding second step surface 575 in the middle form the shallow groove 571. The edge of the rotating block 540 and the corresponding first protrusion 541 can both be matched in the deep groove 572 or the shallow groove 571, and slide along the longitudinal axis in the deep groove 572 and the shallow groove 571, and can be switched back and forth between the deep groove 572 and the shallow groove 571 under the push of the pushing block 560 to realize the switching between the retracted state and the extended state. In the retracted state, the first protrusion 541 is located on the first step surface 574 of the deep groove 572, and in the extended state, the first protrusion 541 is located on the second step surface 575 of the shallow groove 571.
[0050] As Figure 2 and Figure 3 shown, the distal end of the hollow tube 200 is bent laterally. A wire groove (not shown in the figure) is arranged in the direction in which the opening of the hollow tube 200 extends towards the proximal end. One end of the upper hook 310 is a bent hook, and the lower hook 320 is a straight hook. The lower hook 320 can rotate around the connection with the lower hook 320. When the upper hook 310 and the lower hook 320 are retracted into the hollow tube 200, the upper hook 310 and the lower hook 320 form a ring-shaped closure. When the upper hook 310 and the lower hook 320 extend out of the hollow tube 200, the upper hook 310 and the lower hook 320 are separated.
[0051] In actual operation, in the retracted state (hook retraction), the edge of the rotating block 540 and the first protrusion 541 are located in the deep groove 572. When the operator pushes the trigger 530 to move distally, it drives the push rod 550 to move upward as well, and at the same time pushes the pushing block 560 to move upward. When the serrated structure of the second protrusion 561 contacts the first protrusion 541, it will push the rotating block 540 to move upward along the deep groove 572 until the first protrusion 541 moves onto the boss 573, the rotating block 540 rotates, and the first protrusion 541 rotates into the shallow groove 571 on the other side of the boss 573. At this time, the trigger 530 is released, the pushing block 560 and the push rod 550 slide downward, and the spring 520 rebounds to push the rotating block 540 to move downward until the first protrusion 541 moves to the bottom of the shallow groove 571. At this time, it is the extended state (hook extension).
[0052] The above content is only a preferred embodiment of the present utility model. For those of ordinary skill in the art, many changes can be made in the specific implementation manners and application scopes according to the idea of the present utility model. As long as these changes do not depart from the concept of the present utility model, they all fall within the protection scope of the present utility model.
Claims
1. A disposable wire passer, characterized in that, Comprising: A handle (100), the handle (100) having a brake; A hollow tube (200) having a distal end and a proximal end and a longitudinal axis extending between the distal end and the proximal end, the proximal end being connected to the handle (100), the distal end having an opening, and the opening being a tip structure; A connecting rod (400) disposed within the hollow tube (200), one end of the connecting rod (400) being drivingly connected to the brake; A hook (300) connected to the other end of the connecting rod (400), and at least a part of the hook (300) being located within the hollow tube (200), the hook (300) including an upper hook (310) and a lower hook (320), one ends of the upper hook (310) and the lower hook (320) being fixedly connected; Wherein, the brake drives the connecting rod (400) to move along the longitudinal axis within the hollow tube (200) to switch the hook (300) between a retracted state and an extended state; In the retracted state, the upper hook (310) and the lower hook (320) are at least partially retracted into the hollow tube (200), and the other ends of the upper hook (310) and the lower hook (320) overlap to form a closed loop; In the extended state, the upper hook (310) and the lower hook (320) extend out of the hollow tube (200), and the other ends of the upper hook (310) and the lower hook (320) are separated.
2. The disposable wire passer according to claim 1, characterized in that, The brake includes a pushing assembly and a guiding component, the guiding component is disposed on the inner wall of the handle (100), the pushing assembly is disposed within the handle (100), and the pushing assembly moves along the longitudinal axis and engages with the guiding component to achieve the switching between the retracted state and the extended state.
3. The disposable wire passer according to claim 2, characterized in that, The pushing assembly includes a trigger (530), a push rod (550), a push block (560), a rotating block (540) and a spring (520), the rotating block (540) is rotatably sleeved outside the connecting rod (400), the spring (520) is sleeved on the connecting rod (400), one end abuts against the inner wall of the handle (100), and the other end abuts against the rotating block (540), the push rod (550) is axially movably disposed within the handle (100), one end is fixedly connected to the push block (560), and the other end is connected to the trigger (530); a serrated first protrusion (541) is disposed at the other end of the rotating block (540), and a serrated second protrusion (561) is disposed on the push block (560), and the second protrusion (561) matches the first protrusion (541).
4. The disposable wire passer according to claim 3, wherein, The guiding component includes a plurality of deep grooves (572) and a plurality of shallow grooves (571) axially disposed along the handle (100), the deep grooves (572) and the shallow grooves (571) are alternately arranged in a ring on the inner wall of the handle (100), and the first protrusion (541) can slide within the deep grooves (572) and the shallow grooves (571) under the push of the push block (560).
5. The disposable wire passer according to claim 4, wherein A boss (573) is provided between the adjacent deep grooves (572) and shallow grooves (571).
6. The disposable wire passer according to claim 5, wherein, The handle (100) includes an outer cylinder (120) and an inner cylinder (110) that are detachably connected and sleeved together. One end of the inner cylinder (110) is connected to the hollow tube (200), and two side grooves (111) are symmetrically arranged on both side walls at the other end. The deep grooves (572), the shallow grooves (571), and the boss (573) are provided on the inner wall of the inner cylinder (110).
7. The disposable wire passer according to claim 6, wherein, The pushing assembly further includes a sleeve (510). The sleeve (510) is slidably sleeved outside the inner cylinder (110). One end of the sleeve (510) is fixedly connected to the trigger (530), and two cross bars (511) are symmetrically arranged inside the other end. The cross bars (511) are fixedly connected to the push rod (550). The cross bars (511) are fitted in the side grooves (111). The trigger (530) is sleeved outside the inner cylinder (110) and can move along the longitudinal axis to drive the axial movement of the push rod (550) and the push block (560).
8. The disposable wire passer according to claim 7, characterized in that, The rotating block (540) is connected to the connecting rod (400) through a bearing.
9. The disposable wire passer according to claim 1, wherein The distal end of the hollow tube (200) is laterally bent.
10. The disposable wire passer according to claim 9, characterized in that, A wire groove is provided in the direction where the opening of the hollow tube (200) extends toward the proximal end.