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CN-122004998-A - Bone tunnel positioning drilling and threading integrated device

CN122004998ACN 122004998 ACN122004998 ACN 122004998ACN-122004998-A

Abstract

The invention relates to a bone tunnel positioning drilling and threading integrated device, and belongs to the technical field of medical appliances. The device comprises a body, a positioning hook, a drill bit assembly and a threading wire, wherein the positioning hook is detachably arranged at the far end of the body and connected with the threading wire, the threading wire extends to a near-end locking mechanism along a body wire slot, a magnetic attraction matching structure is arranged between the drill bit head and the positioning hook, the drill bit head is provided with a containing cavity, the positioning hook is allowed to freely rotate relative to the drill bit in an adsorption state, the locking mechanism is released after drilling is completed, and the positioning hook and the threading wire are driven to synchronously pass through a bone tunnel through magnetic force when the drill bit retreats. The invention thoroughly solves the threading problem caused by soft tissue collapse through a magnetic synchronous threading mechanism, ensures the safety and convenience of wire management through the wire slot and the locking mechanism, effectively prevents the threading from being twisted off through the autorotation design of the accommodating cavity, and remarkably improves the operation efficiency and success rate.

Inventors

  • QIAN HONG
  • JIN JIAJIA
  • BAO NIRONG

Assignees

  • 中国人民解放军东部战区总医院

Dates

Publication Date
20260512
Application Date
20260305

Claims (10)

  1. 1. The utility model provides a bone tunnel location drilling and cross line integrated device which characterized in that includes: The body is provided with a positioning axis; A positioning hook detachably mounted to the distal end of the body; The drill bit assembly can reciprocate along the positioning axis relative to the body, and one end of the drill bit assembly, which is close to the positioning hook, is in magnetic attraction fit with the positioning hook; one end of the threading wire is connected with the positioning hook, and the other end of the threading wire extends proximally along the body; The locking mechanism is arranged on the body and used for selectively locking or releasing the threading wire; When the drill bit assembly is combined with the positioning hook through magnetic attraction and the locking mechanism is in a release state, the positioning hook is suitable for being separated from the body when the drill bit assembly is retracted, and the threading wire is driven to pass through the bone tunnel.
  2. 2. The integrated bone tunnel positioning drilling and threading device of claim 1 wherein the positioning hook is mounted at the distal end of the body by a plug structure and the axial tension generated by the magnetic attraction fit is greater than the break-away resistance of the plug structure.
  3. 3. The bone tunnel positioning drilling and threading integrated device of claim 2 wherein the plug structure comprises an open-type chute at the distal end of the positioner body and an adapter slider on the positioning hook, wherein the open-type chute is oriented to the positioning hook.
  4. 4. The integrated bone tunnel positioning, drilling and threading device according to any one of claims 1 to 3 wherein the drill bit assembly comprises a drill bit and a drill rod for driving the drill bit to rotate, a containing cavity is formed in the head of the drill bit, and a part of the positioning hook is suitable for entering the containing cavity and being magnetically attracted and fixed with the drill bit.
  5. 5. The integrated bone tunnel locating drilling and threading device of claim 4 wherein the locating hook is free to rotate about the locating axis relative to the drill bit when the locating hook is adsorbed within the receiving cavity.
  6. 6. The bone tunnel locating drilling and threading integrated device according to any one of claims 1 to 3 wherein the head of the drill bit assembly is made of magnetically conductive material, the locating hook is embedded with a permanent magnet, or the head of the drill bit assembly is embedded with a permanent magnet, and the locating hook is made of magnetically conductive material.
  7. 7. The bone tunnel positioning drilling and threading integrated device according to any one of claims 1 to 3, wherein an embedded wire groove extending along a path of the body is formed in the body, the threading wire is accommodated in the wire groove, and a limiting part for preventing the threading wire from falling out is arranged at a notch of the wire groove.
  8. 8. The bone tunnel positioning drilling and threading integrated device of any one of claims 1 to 3 wherein the locking mechanism is a spring hold down mechanism or a threaded knob mechanism disposed at the proximal end of the body that normally locks the threading.
  9. 9. The bone tunnel positioning drilling and threading integrated device according to any one of claims 1 to 3, wherein the locking mechanism comprises a winding part arranged on the back side of the proximal end of the body, the winding part comprises at least one winding post protruding from the surface of the body and a clamping groove arranged on the lateral side of the winding post or the body, and the threading wire (31) is locked by winding at least one circle on the winding post and embedding the winding post into the clamping groove.
  10. 10. The bone tunnel locating drilling and threading integrated device of any one of claims 1 to 3 wherein a limit structure is further provided on the drill bit assembly for limiting the maximum travel of the drill bit assembly distally along the locating axis.

Description

Bone tunnel positioning drilling and threading integrated device Technical Field The invention relates to an integrated device for bone tunnel positioning, drilling and lead threading in orthopedic operations (such as ligament reconstruction, suture anchor implantation and the like). Background With the development of clinical orthopedic surgery techniques, arthroscopic surgery such as Anterior Cruciate Ligament (ACL) reconstruction, rotator cuff repair, etc., requires precise bone tunneling into bone to implant grafts or sutures. Currently, an arcuate bone tunnel locator is often used clinically for assistance. Existing bone tunnel positioners (e.g., chinese patent CN 217014141U) generally include an arcuate body, a positioning cylinder, and a positioning hook. During operation, the positioning hook is used for determining the outlet of the bone tunnel, and then the drill bit is guided to drill into the bone along the positioning axis to generate the tunnel. However, in practical clinical application, the tunnel positioner in the prior art has the following remarkable defects that 1) after a bone tunnel is generated, a drill bit is withdrawn, a wire lead is manually penetrated into the tunnel, a graft or a suture line is guided by the wire lead, and the threading process is complicated. Moreover, since the bone tunnel exit is often covered by soft tissue such as muscle, synovium or fat, after the drill bit is withdrawn, the soft tissue is very prone to collapse and clog the exit, resulting in the subsequent penetration of the metallic lead at the exit being blocked, even bending, breaking or misentering the tissue space, resulting in threading failure. 2) The threading process belongs to blind operation, repeated threading attempts not only prolong operation time, but also possibly cause unnecessary physical damage to soft tissues around the bone tunnel, and increase damage risk. It should be noted that, the proximal end in the present application refers to an end that is close to the operator in use, and the distal end is an end that is far from the operator and close to the focus of the patient. Disclosure of Invention The invention aims to solve the technical problems that the existing device is difficult to thread after drilling, is easily interfered by soft tissues and lacks management in the process of drilling. In order to solve the technical problems, the technical scheme provided by the invention is that the bone tunnel positioning drilling and threading integrated device comprises: The body is provided with a positioning axis; A positioning hook detachably mounted to the distal end of the body; The drill bit assembly can reciprocate along the positioning axis relative to the body, and one end of the drill bit assembly, which is close to the positioning hook, is in magnetic attraction fit with the positioning hook; one end of the threading wire is connected with the positioning hook, and the other end of the threading wire extends proximally along the body; The locking mechanism is arranged on the body and used for selectively locking or releasing the threading wire; When the drill bit assembly is combined with the positioning hook through magnetic attraction and the locking mechanism is in a release state, the positioning hook is suitable for being separated from the body when the drill bit assembly is retracted, and the threading wire is driven to pass through the bone tunnel. Compared with the prior art, the invention has the following remarkable beneficial effects: 1) According to the invention, the magnetic attraction matching relationship is established between the positioning hook and the drill bit assembly, so that the traditional multiple operation steps are simplified into a continuous single operation process, when the drill bit is used for completing a drilling task, the positioning hook is immediately captured through magnetic force, zero-delay threading of a threading wire after bone tunnel generation is realized, and high integration of positioning, drilling and threading wire operation is realized. 2) The invention utilizes the natural path of the drill bit to drive the positioning hook to pass through the bone tunnel, at the moment, the drill bit does not completely leave the tunnel, the functions of reaming and blocking peripheral soft tissues can be achieved, and the mechanism of synchronous lead wire avoids the problems of bending, breaking or threading failure of the metal wire caused by the collapse of soft tissues, muscles or synovium to block the tunnel outlet. 3) The invention has magnetic attraction fixing function between the positioning hook and the drill bit, and the adsorption force is larger than the separation resistance of the splicing structure, so that the stability of the lead in the back-drawing process is ensured, when in use, a doctor can complete the switching from locking to releasing the lead by one hand by matching with the selective locking or releasing