PCL wire passing device

Abstract

The utility model relates to the field of medical instruments, in particular to a PCL wire passing device which comprises a supporting part, a sleeve is fixedly connected to one end of the supporting part, an elastic chuck is arranged at the free end of the sleeve, a sliding groove communicated with the sleeve is formed in the other end of the supporting part, a push rod is detachably connected into the sliding groove through a stop assembly, and the elastic chuck is arranged at the free end of the push rod. The push rod is slidably connected in the sleeve, a wrapping post is further fixedly connected to the periphery of the supporting part, after the pressing part is loosened, the push rod is reset under the action of the pressure spring, the mode is similar to a driving mode of pushing the push rod of an injector, one-hand operation can be well carried out, and the situation that the lead efficiency is affected by two-hand operation is prevented; the pair of elastic pieces are symmetrically arranged up and down and correspond to the folded index finger and thumb in position, on one hand, the push rod is fixed by fixing the end cover, and on the other hand, the index finger and the thumb can conveniently press the elastic pieces at the same time to disassemble the end cover.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a PCL wire guiding device. Background Technology

[0002] Knee cruciate ligament injuries can be divided into anterior cruciate ligament (ACL) injuries and posterior cruciate ligament (PCL) injuries. ACL injuries are more common than PCL injuries. Depending on the severity of the injury, ACL repair or reconstruction may be performed. PCL reconstruction is often performed arthroscopically using autologous semitendinosus and gracilis muscles. A diagonal incision is made inside the tibial tuberosity, and the gracilis and semitendinosus muscles are harvested. The tendons are folded in half, the diameter of the semitendinosus is measured, and the tendons are interlaced and sutured 3 cm from each end. A bone tunnel is created in the anteromedial bundle of the ACL, and then a femoral ACL tibial guide is inserted. A suitable bone tunnel is created to match the graft. The ligament plate is pulled out using traction sutures, the tendon is tightened, and a compression screw is used to secure it to the lateral tibial tunnel opening, thus completing the PCL reconstruction.

[0003] To facilitate the threading of traction sutures, a PCL suture-passing device is required. For example, Chinese Patent Publication No. CN217488879U discloses a suture passer for arthroscopic surgery, relating to the field of medical devices. This device includes a handle, a metal sleeve fixedly connected to the front end of the handle, and an elastic sleeve fixedly connected to the other end of the metal sleeve. The elastic sleeve has a suture clamping opening at its top. A guide groove is provided inside the handle, and a guide slider is slidably connected to the inner wall of the guide groove. A metal push rod is fixedly connected to the outer wall of one side of the guide slider. The metal push rod slidably connects to the inner walls of the metal sleeve and the elastic sleeve. By setting an upwardly curved elastic sleeve with a suture clamping opening at its top, when the guide slider pushes the metal push rod along the curved inner wall of the sleeve, it straightens the elastic sleeve, facilitating suture delivery through the tibial tunnel. After passing through the tunnel, the metal push rod is removed, and the elastic sleeve bends upward again, allowing for angle adjustment of suture delivery. Simultaneously, the front end of the elastic sleeve is arc-shaped, preventing damage to blood vessels, nerves, and other structures behind the knee joint at the end of the tunnel.

[0004] In actual operation, when the metal push rod is pushed along the inner wall of the curved sleeve by the slider, it will support the elastic sleeve and straighten it, thus facilitating the thread delivery through the tibial tunnel. Considering that the slider is slidably connected to the top of the handle, pushing the slider requires both hands to work simultaneously, that is, one hand to fix the handle and the other hand to push the slider. It cannot be done with one hand, which hinders the operation. Furthermore, after fixing the sleeve, the push rod is disassembled and assembled by connecting the threaded plug with a threaded connection. The threaded plug needs to be rotated multiple times, which makes the disassembly and assembly inefficient. Utility Model Content

[0005] The purpose of this utility model is to solve the shortcomings of the existing technology, such as the inconvenience of pushing the push rod and the slow efficiency of disassembling and assembling the push rod, and to propose a PCL wire guiding device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design a PCL cable guide device, including a support part, a sleeve fixedly connected to one end of the support part, an elastic clamp provided at the free end of the sleeve, a groove communicating with the sleeve at the other end of the support part, a push rod detachably connected to the groove through a stop assembly, the push rod slidably connected inside the sleeve, wherein a winding post is also fixedly connected to the periphery of the support part.

[0008] Furthermore, the stop assembly includes an end cap that matches the opening of the slide groove. The end cap has a boss structure, and elastic sheets are detachably connected to both sides of the extended portion via connecting parts.

[0009] Among them, the pair of connecting parts are L-shaped and arranged opposite each other, the elastic sheet is Z-shaped, and the bent part at the bottom of the elastic sheet is provided with a slot. The pair of connecting parts are engaged with the elastic clamp through the slot.

[0010] Furthermore, the top of the elastic sheet extends downward near the end cap to form a blocking part, and the other end is provided with a guide slope that cooperates with the inclined surface of the support part. The periphery of the support part is provided with a relief groove, and the blocking part is engaged in the relief groove.

[0011] Furthermore, a compression spring is fitted onto one end of the push rod and a stop plate is fixedly connected thereto. The two ends of the compression spring abut against the stop plate and the side of the support portion, respectively. The midpoint of the end cap is slidably connected to the push rod, and the end cap stops the stop plate.

[0012] Furthermore, a pressing part is fixedly connected to the end of the push rod away from the elastic clamp, and a pair of protrusions are provided on the periphery of the support part near the pressing part.

[0013] Furthermore, the other end of the elastic clamp has a wire clamping opening.

[0014] The PCL thread guiding device proposed in this utility model has the following advantages: A compression spring is sleeved around one end of the push rod. By pressing the spring in conjunction with a pair of protrusions, the push rod is moved, causing it to straighten the elastic sleeve and facilitate thread delivery through the tibial tunnel. After releasing the pressing spring, the push rod returns to its original position, similar to the driving mechanism of a syringe plunger. This allows for easy one-handed operation, preventing two-handed operation from affecting thread delivery efficiency. Furthermore, a pair of elastic plates are symmetrically arranged, corresponding to the position of the index finger and thumb when they are together. This allows for quick assembly and disassembly of the push rod by simultaneously pressing the elastic plates with the index finger and thumb, while also enabling the push rod to be quickly disassembled and reassembled. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the stop assembly of this utility model;

[0017] Figure 3 for Figure 2 A magnified structural diagram of area A;

[0018] Figure 4 This is a cross-sectional view of the stop assembly of this utility model;

[0019] Figure 5 for Figure 4 A magnified structural diagram of region B.

[0020] In the diagram: 1. Support part; 11. Slide groove; 12. Relief groove; 13. Guide part; 14. Protrusion; 2. Sleeve; 3. Elastic clamp; 31. Wire clamping port; 4. Stop assembly; 41. End cap; 42. Connecting part; 43. Elastic sheet; 431. Slot; 432. Abutment part; 433. Guide slope; 5. Push rod; 51. Compression spring; 52. Baffle; 53. Pressing part; 6. Winding post. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figure 1-5A PCL cable guide device includes a support part 1, a sleeve 2 fixedly connected to one end of the support part 1, an elastic clamp 3 provided at the free end of the sleeve 2, and a sliding groove 11 communicating with the sleeve 2 at the other end of the support part 1. A push rod 5 is detachably connected to the sliding groove 11 through a stop assembly 4. The push rod 5 is slidably connected inside the sleeve 2. A winding post 6 is also fixedly connected to the periphery of the support part 1.

[0023] It should be added that the support part 1 has a cylindrical structure and is coaxially arranged with the sleeve 2. Pushing the push rod 5 causes it to slide along the inner wall of the sleeve 2 into the interior of the elastic clamp 3, so that the upwardly curved elastic clamp 3 is horizontally supported by the push rod 5, thereby facilitating passage through the patient's tibial tunnel.

[0024] The sleeve 2 and push rod 5 are both made of medical stainless steel, the elastic clamp 3 is made of medical silicone material, and one end of it is bent upward. The sleeve 2 passes through the patient's tibial tunnel, while the support part 1 is placed outside the patient's body.

[0025] The outer wall of the winding post 6 has multiple winding grooves. By winding the tail of the traction line around the winding grooves on the outer wall of the winding post 6, the rear end of the traction line can be kept taut, thereby preventing the front end of the traction line from accidentally coming loose when pushed.

[0026] Furthermore, the stop assembly 4 includes an end cap 41, which matches the opening of the slide groove 11. The end cap 41 has a boss structure, and elastic pieces 43 are detachably connected to both sides of the extended portion via connecting parts 42.

[0027] Among them, the pair of connecting parts 42 are L-shaped and arranged opposite to each other, the elastic sheet 43 is Z-shaped, and the bent part at the bottom of the elastic sheet 43 is provided with a slot 431, and the pair of connecting parts 42 are engaged with the elastic clamp 3 through the slot 431.

[0028] It is worth mentioning that the connecting part 42 is integrally formed with the end cap 41. The connecting part 42 is preferably made of a material with deformation capability, including plastic, silicone, etc. A gap for deformation is provided between a pair of connecting parts 42, and an inclined surface is provided on the opposite side of its top. When a pair of connecting parts 42 comes into contact with the elastic sheet 43 through the inclined surface, deformation occurs by utilizing the above-mentioned gap, and then it engages with the slot 431.

[0029] Furthermore, the top of the elastic sheet 43 extends downward near the end cap 41 to form a blocking part 432, and the other end is provided with a guide slope 433 that cooperates with the slope of the support part 1. The support part 1 is provided with a relief groove 12 on its periphery, and the blocking part 432 is engaged in the relief groove 12.

[0030] It is worth mentioning that the elastic sheet 43, also known as a leaf spring, is a simple spring that uses the deformation of an elastic metal sheet to generate spring characteristics. It can be divided into two categories according to its shape: straight leaf spring and curved leaf spring.

[0031] Furthermore, guide portions 13 are provided on both sides of the relief groove 12, and the elastic sheet 43 is more accurately engaged with the relief groove 12 through the guide portions 13.

[0032] It is worth mentioning that a pair of elastic sheets 43 are symmetrically arranged, and their positions correspond to the positions of the index finger and thumb when they are closed. Of course, the width of the elastic sheet 43 is approximately equal to the width of a human fingernail, so as to prevent the finger from getting stuck on the outer wall of the support part 1 when pressing the elastic sheet 43.

[0033] More specifically, one end of the push rod 5 is fitted with a compression spring 51 and a baffle 52 is fixedly connected thereto. The two ends of the compression spring 51 respectively abut against the baffle 52 and the side of the support part 1. The midpoint of the end cap 41 is slidably connected to the push rod 5, and the end cap 41 stops the baffle 52.

[0034] Specifically, the thrust applied to the end cap 41 by the spring 51 in the relaxed state is less than the resistance generated by the engagement between the pair of elastic plates 43 and the support portion 1, thus preventing the end cap 41 from detaching from the support portion 1.

[0035] In general, the push rod 5 is fixedly connected to a pressing part 53 at one end away from the elastic clamp 3, and a pair of protrusions 14 are provided opposite to each other at one end of the support part 1 near the pressing part 53.

[0036] It is worth mentioning that when pushing the push rod 5, it is necessary to use the pressing part 53 and a pair of protrusions 14. The specific operation method can be referred to as pushing the piston rod in the syringe, that is, the thumb presses the pressing part 53, and the index and middle fingers are respectively placed on the pair of protrusions 14 to better leverage the force to push the push rod 5. The push rod 5 then straightens the elastic clamp 3, and the wire clamping port 31 is used to facilitate wire feeding.

[0037] Then, push rod 5 is reset under the action of compression spring 51.

[0038] Finally, the other end of the elastic clamp 3 is provided with a wire clamping port 31.

[0039] Working method: During operation, the push rod 5 is driven to move by pressing the press part 53 with the thumb in conjunction with the pressing part 53 and a pair of protrusions 14. When one end of the push rod 5 moves into the interior of the elastic clamp 3, the upward-curving elastic clamp 3 is straightened horizontally. Then, the traction line is passed through the clamping opening 31 at the top of the elastic clamp 3, and the tail of the traction line is wrapped around the winding post 6 to fix it, so that the traction line is in a taut state. Then, the sleeve 2 together with the straightened elastic clamp 3 is passed through the patient's tibial tunnel. When the elastic clamp 3 comes out from the other end of the patient's tibial tunnel, the traction line wrapped on the winding post 6 is loosened.

[0040] Then release the pressing part 53, and the push rod 5 will reset under the action of the compression spring 51, and the wire feeding is completed;

[0041] Finally, press the elastic sheet 43 on both sides simultaneously with your index finger and thumb, causing the elastic sheet 43 to deform and retract inward, thus disengaging from the support part 1. At this time, under the action of the compression spring 51, the end cap 41 and push rod 5 can be easily removed for disinfection.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A PCL threading device comprising a support portion (1), characterized in that: The support part (1) is fixedly connected with a sleeve (2) at one end, the free end of the sleeve (2) is provided with an elastic chuck (3), the other end of the support part (1) is provided with a chute (11) communicating with the sleeve (2), the chute (11) is detachably connected with a push rod (5) through a stop component (4), the push rod (5) is slidingly connected in the sleeve (2), wherein the periphery of the support part (1) is further fixedly connected with a winding post (6).

2. The PCL wire passing device according to claim 1, wherein: The stop component (4) comprises an end cover (41) matched with the opening of the chute (11), the end cover (41) is in a boss structure, and the two sides of the extension part are detachably connected with elastic sheets (43) through connecting parts (42); Wherein, the pair of connecting parts (42) are in L-shaped structure and oppositely arranged, the elastic sheet (43) is in Z-shaped structure, the bending part at the bottom of the elastic sheet (43) is provided with a clamping groove (431), and the pair of connecting parts (42) clamp the elastic chuck (3) through the clamping groove (431).

3. The PCL wire passing device of claim 2, wherein: The top of the elastic sheet (43) extends downward to form a resisting part (432) near one side of the end cover (41), and the other end is provided with a guide slope (433) matched with the slope of the support part (1), wherein the periphery of the support part (1) is provided with a clearance groove (12), and the resisting part (432) is clamped in the clearance groove (12).

4. The PCL wire passing device of claim 2, wherein: One end of the push rod (5) is sleeved with a compression spring (51) and fixedly connected with a baffle (52), the two ends of the compression spring (51) respectively abut against the baffle (52) and the side surface of the support part (1), the midpoint of the end cover (41) is slidingly connected with the push rod (5), and the end cover (41) stops the baffle (52).

5. The PCL wire passing device of claim 1, wherein: The end of the push rod (5) away from the elastic chuck (3) is fixedly connected with a pressing part (53), and the periphery of the support part (1) is oppositely provided with a pair of protruding parts (14) near one end of the pressing part (53).

6. The PCL wire passing device of claim 1, wherein: The other end of the elastic chuck (3) is provided with a wire clamping opening (31).

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