CN219439309U - Improved patella tunnel guide - Google Patents

Abstract

The utility model relates to an improved patella tunnel guide, which comprises a guide handle, a sliding sleeve and a drill bit, wherein the top end of the guide handle is provided with a guide head which is of a hollow tooth-shaped structure; the bottom end of the guide handle is connected with a sliding sleeve, and the end of the sliding sleeve, which is close to the guide head, is of a tooth-shaped structure; the surface of the sliding sleeve is provided with tooth grooves, and a drill bit is sleeved in the sliding sleeve; the joint of the sleeve and the guide handle is provided with a tooth-shaped locking device. The advantages are as follows: the tooth-shaped locking device with higher accuracy and stability is used, the finished product tunnel can be molded at one time, the risk of patella fracture caused by the fact that extra tunnels appear in the patella due to deviation of drilling is reduced, and the needle outlet point is of a hollow structure, so that the drill bit can not be blocked when drilling the patella, the drill bit can be drilled without removing the fixing device for fixing the patella, the operation is convenient, the structure is simple, and the device is suitable for being used in patella dislocation treatment operation.

Description

Improved patella tunnel guide

[ field of technology ]

The utility model relates to the technical field of medical instruments, in particular to an improved patella tunnel guide.

[ background Art ]

Proper exercise is helpful for physical health, but because of insufficient warm-up, exercise posture is not standard enough, and knee joint injury is easy to occur, wherein a lot of the exercise is patella dislocation, for recurrent patella dislocation, surgery is usually required, and the reconstruction of the inner patella ligament is a core means for treating recurrent patella dislocation. In the patella dislocation operation, a patella traversing tunnel needs to be manufactured, in the process of manufacturing the patella traversing tunnel, an anterior cruciate ligament reconstruction guide is generally used for positioning and guiding the patella tunnel, but because a sleeve at one end of the anterior cruciate ligament reconstruction guide can slide and cannot be fixed with the patella, the patella is not particularly firmly fixed, in addition, the activity degree of the patella is high, when the tunnel is drilled by a drill bit, the sliding is easily generated between the guide and the patella, so that errors are generated in the position and the direction of the tunnel, the tunnel needs to be re-drilled, the operation time is increased, and when a new tunnel is drilled, the drill bit easily enters the original tunnel, the difficulty of drilling the tunnel is increased, and the additionally increased inactive patella tunnel also increases the risk of patella fracture; at the distal end of the anterior cruciate ligament reconstruction guide, due to the solid structure, when the drill bit drills the patella, the drill bit is blocked by the guide, and the guide is removed to drill the patella, so that the operation is not convenient. In the prior art, a plurality of instruments for making a patella traversing tunnel exist, but few instruments can be produced in large scale to solve the problems in actual operation, and the main reasons are as follows: 1. the fixation is not firm, the tunnel is easy to deviate from positioning when being manufactured, most of the prior art is fixed by threads, and if the fixation method is not easy to loosen due to improper operation, the front and back positioning is inaccurate, and the operation effect is affected; 2. the cost is high, and most of the prior art has complex design and is difficult to produce in large scale.

Chinese patent application: CN206463037U discloses a positioning guide for articular cartilage injury repair, comprising an intra-articular positioning rod, a handle, a chute, an adjustable rod and a hollow positioning rod; one end of the intra-joint positioning rod is provided with an intra-joint guide head, the other end of the intra-joint positioning rod is connected with the chute through the handle, the chute adopts an arc chute, and the circle center of the arc chute falls on the intra-joint guide head; the adjustable rod comprises an arc rod in sliding fit with the arc chute and a connecting part arranged at one end of the arc rod, the adjustable rod is connected with the hollow positioning rod through the connecting part, and the tail end of the hollow positioning rod points to the guide head in the joint. The utility model can rapidly and accurately position the bone canal, is particularly suitable for repairing patellar cartilage, can obviously improve the operation efficiency, shorten the operation time, reduce the operation risk of patients and provide instrument support for cartilage graft repair. However, the positioning head in the guide is of a solid structure, when the drill bit drills out the patella, the drill bit can be blocked by the positioning head, the guide is required to be removed to drill out the patella, the operation is not convenient enough, the positioning fastening device used in the device is a screw thread device, for the patella with high positioning accuracy to traverse the tunnel making instrument, the fastening device is not easy to loose in operation, the positioning is inaccurate, the more serious situation is offset in the tunnel drilling process, and the additionally increased inactive patella tunnel can increase the risk of patella fracture.

In view of the foregoing, there is a need for an improved patella tunnel guide that not only can determine the position of a tunnel, but also can prevent the fastening device from being offset during the tunnel drilling process, and has high accuracy, convenient operation, and no influence on the overall design of the needle insertion and needle extraction of the drill.

[ utility model ]

The utility model aims to provide an improved patella tunnel guide device which not only can determine the position of a tunnel, but also can prevent a fastening device from shifting in the process of drilling the tunnel, has high accuracy and convenient operation, and has no influence on the needle insertion and needle extraction of a drill bit due to the overall design.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

an improved patella tunnel guide comprises a guide handle, a sliding sleeve and a drill bit, wherein the top end of the guide handle is provided with a guide head which is shaped like a Chinese character , and the guide head is of a hollow tooth-shaped structure; the bottom end of the guide handle is connected with a sliding sleeve, and the end of the sliding sleeve, which is close to the guide head, is of a tooth-shaped structure; the surface of the sliding sleeve is provided with tooth grooves, and a drill bit is sleeved in the sliding sleeve; the joint of the sleeve and the guide handle is provided with a tooth-shaped locking device.

As a preferred example, the tooth-shaped locking device comprises a lock body, a backstop buckle and a pushing knob, wherein the lock body is sleeved on the sliding sleeve; the backstop is hinged on the lock body, and the hinge position is the middle part of the backstop; the back end of the back stop button is provided with a back stop hook, an axle is arranged in the lock body, the axle is matched with a tooth slot on the sliding sleeve, and the pushing knob is arranged on one side of the lock body and is coaxially connected with the axle inside.

As another preferable example, the lock body is provided with an opening through which the retaining hook can pass.

As another preferable example, one end of the guiding handle is concave.

The utility model has the advantages that:

1. the tooth-type locking device with higher accuracy and stability can be used for manufacturing the patella traversing tunnel better than the traditional fastening method, the finished product tunnel can be molded at one time, the unstable and repeated adjustment of the instrument is not needed, the operation time is shortened, and the risk of patella fracture caused by the fact that the additional tunnel appears in the patella due to deviation of drilling is reduced.

2. The needle outlet point is of a hollow structure, so that the drill bit can not be blocked when drilling the patella, and the drill bit can drill without removing a fixing device for fixing the patella, and the operation is convenient.

3. The utility model has simple structure and convenient operation, and is suitable for the treatment of patella dislocation operation.

[ description of the drawings ]

Fig. 1 is a schematic view of the structure of the improved patella tunnel guide of the present utility model.

[ detailed description ] of the utility model

The utility model is further described below with reference to examples and with reference to the accompanying drawings.

Reference numerals and components referred to in the drawings are as follows:

1. guide handle	11. Guide head
		2. Sliding sleeve	3. Drill bit
4. Tooth-shaped locking device	41. Lock body
		42. Retaining buckle	43. Push knob

Example 1

Referring to fig. 1, fig. 1 is a schematic view of the improved patella tunnel guide according to the present utility model. The improved patella tunnel guide comprises a guide handle 1, a sliding sleeve 2 and a drill bit 3, wherein the top end of the guide handle 1 is provided with a guide head 11, the guide handle 1 is in a shape as a whole, the guide head 11 is of a hollow tooth-shaped structure, the drill bit can be free from being blocked when being drilled by the hollow inside the guide head 11, the guide head is prevented from being removed when the drill bit cannot be drilled, the operation is convenient and fast, and the operation time is saved; the bottom end of the guide handle is connected with a sliding sleeve 2, and the end, close to the guide head 11, of the sliding sleeve 2 is of a tooth-shaped structure, so that the patella can be fixed better by the tooth-shaped structure; tooth grooves are formed in the surface of the sliding sleeve 2, and a drill bit 3 is sleeved in the sliding sleeve 2; the joint of the sliding sleeve 2 and the guide handle 1 is provided with a tooth-shaped locking device 4.

In this embodiment, the tooth-type locking device 4 preferably includes a lock body 41, a retaining buckle 42 and a pushing knob 43, where the lock body 41 is sleeved on the sliding sleeve 2; the retaining buckle 42 is hinged on the lock body 41, and the hinge position is the middle part of the retaining buckle 42; the back end of the back stop button 42 is provided with a back stop hook, the lock body 41 is internally provided with a wheel shaft, the wheel shaft is matched with a tooth slot on the sliding sleeve 2, and the pushing knob 43 is arranged on one side of the lock body 41 and is coaxially connected with the wheel shaft inside.

In this embodiment, the lock body 41 is preferably provided with an opening through which the retaining hook can pass.

In this embodiment, it is preferable that one end of the guiding handle 1 is concave, which is suitable for the hand of the operator to prevent the sliding deviation caused by perspiration of the palm.

The application method and principle of the utility model are as follows: firstly, a patella is clamped between a guide head 11 and a sliding sleeve 2, a pushing knob 43 is rotated to enable the sliding sleeve 2 to advance to be close to two ends of the patella, the position of the patella is fixed by the sliding sleeve 2 according to the requirement in operation, the pushing knob 43 is continuously rotated to enable the patella to be stably fixed at the position after the position of a bone path is determined, then a retaining buckle 42 is operated to enable a retaining hook to hook a tooth socket on the sliding sleeve 2 to prevent the whole tooth-shaped locking device 4 from backing, then a drill bit 3 is inserted into the sliding sleeve 2 to manufacture a patella tunnel, the drill bit 3 is pulled out after manufacturing is completed, the retaining buckle 42 is loosened, finally the pushing knob 43 is rotated to enable the guide head 11 and the sliding sleeve 2 not to fix the patella any more, and the patella is sterilized and recovered to wait for the next use.

It should be noted that, the tooth-shaped locking device 4 with higher accuracy and stability can be used for manufacturing the patella traversing tunnel better than the traditional fastening method, the finished product tunnel can be molded at one time, the unstable adjustment of the instrument is not needed for many times, the operation time is shortened, the risk of fracture of the patella caused by the extra tunnel in the patella due to deviation of drilling is reduced, the needle outlet point is of a hollow structure, the patella can not be blocked when the drill bit drills out, the patella can be drilled out without removing the fixing device for fixing the patella, the operation is convenient, the structure is simple, the operation is convenient, and the device is suitable for being used for treating the patella dislocation operation.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and additions to the present utility model may be made by those skilled in the art without departing from the principles of the present utility model and such modifications and additions are to be considered as well as within the scope of the present utility model.

Claims (4)

1. The improved patella tunnel guide device is characterized by comprising a guide handle, a sliding sleeve and a drill bit, wherein the top end of the guide handle is provided with a guide head, the guide handle is in a shape as a whole, and the guide head is of a hollow tooth-shaped structure; the bottom end of the guide handle is connected with a sliding sleeve, and the end of the sliding sleeve, which is close to the guide head, is of a tooth-shaped structure; the surface of the sliding sleeve is provided with tooth grooves, and a drill bit is sleeved in the sliding sleeve; the joint of the sleeve and the guide handle is provided with a tooth-shaped locking device.

2. The improved patellar tunnel guide according to claim 1 wherein said tooth-lock device comprises a lock body, a backstop, and a push knob, said lock body being sleeved on a sliding sleeve; the backstop is hinged on the lock body, and the hinge position is the middle part of the backstop; the back end of the back stop button is provided with a back stop hook, an axle is arranged in the lock body, the axle is matched with a tooth slot on the sliding sleeve, and the pushing knob is arranged on one side of the lock body and is coaxially connected with the axle inside.

3. The improved patella tunnel guide according to claim 2 wherein said lock body is provided with an opening through which the retaining hook passes.

4. The improved patellar tunnel guide according to claim 1 wherein said guide handle is concave at one end.