CN206355129U - It is a kind of can be with the hollow screw screwdriver of fixation guide pin - Google Patents

Abstract

A hollow screw driver capable of fixing a guide pin belongs to the technical field of orthopedic medical devices and is used for preventing the guide pin from rotating and moving forward with the hollow screw. The technical solution is: the screwdriver handle is a two-body structure consisting of a handle and a base, the base is located at the rear of the handle, the upper end of the base has a sleeve, the lower end of the sleeve is connected with the guide pin hole of the base, and the lower end of the handle has a The bushing hole of the axis of the guide pin hole, the inner diameter of the bushing hole matches the outer diameter of the bushing, the bushing of the base is inserted into the handle along the bushing hole at the lower end of the handle, the inner diameter of the bushing matches the guide pins of the base and the handle The inner diameters of the holes are matched, and there are jacking screw holes on the side of the base, and the jacking bolts pass through the jacking screw holes and are tightened with the guide pins in the guide pin holes. In the utility model, when the hollow screw is screwed in, the guide pin will not advance accordingly, which avoids the accident that the guide pin penetrates the femoral head forward and destroys the articular surface, and even penetrates into the pelvic cavity. The utility model has the advantages of simple structure and convenient use, which ensures operation safety and improves operation quality.

Description

A hollow screw driver capable of fixing guide pins

technical field

The utility model relates to a hollow screw screwdriver for fixing a guide pin for treating femoral neck fracture, which belongs to the technical field of orthopedic medical instruments.

Background technique

With the aging of the population, the number of patients suffering from femoral neck fractures continues to increase. The surgical method of closed reduction and cannulated screws for the treatment of femoral neck fractures has the advantages of less trauma and avoiding joint replacement. In the traditional operation method for the treatment of femoral neck fracture, the guide pin is inserted first and then the hollow screw is inserted. Since the diameter of the guide pin is slightly smaller than the inner diameter of the hollow screw, the guide pin should not move when the hollow screw advances along the guide pin. However, in the actual operation process, due to the embedding of bone tissue, the friction between the guide pin and the hollow screw is greatly increased, causing the guide pin to move forward with the hollow screw and the screwdriver from time to time. Since the part to be reached by the cannulated screw is very close to the articular surface of the femoral head, the guide pin that is at the front of the cannulated screw and moves forward together with the cannulated screw will penetrate the femoral head and destroy the articular surface, and even penetrate into the pelvic cavity , causing surgical accidents and serious complications. Therefore, how to prevent the guide pin from moving when the hollow screw is placed is an important issue to be solved in the treatment of femoral neck fractures.

Utility model content

The technical problem to be solved by the utility model is to provide a hollow screw screwdriver that can fix the guide pin. This hollow screw screwdriver can fix the end of the guide pin without affecting the conventional operation of inserting the hollow screw, so that the hollow screw can be fixed relative to the guide pin. The needle continues to advance at a constant speed while keeping the guide wire relatively still within the femoral head.

The technical scheme that solves the above-mentioned technical problem is:

A hollow screwdriver capable of fixing a guide pin, which includes a screwdriver shaft and a screwdriver handle, the screwdriver handle is connected to the rear end of the screwdriver rod, along the central axis of the screwdriver rod and the screwdriver handle, there is a guide pin hole through which the guide pin passes, and its improvement The difference is that the screwdriver handle is a two-body structure consisting of a handle and a base. The base is located at the rear of the handle. There is a sleeve at the upper end of the base. The lower end of the sleeve is connected with the guide pin hole of the base. The sleeve hole of the pinhole axis, the inner diameter of the sleeve hole matches the outer diameter of the sleeve of the base, the sleeve of the base is inserted into the handle along the sleeve hole at the lower end of the handle, the inner diameter of the sleeve matches the guide of the base and the handle The inner diameter of the pinhole matches, and there is a jacking screw hole on the side of the base. The jacking screw hole is connected with the side wall of the guide pin hole in the base. The jacking bolt passes through the jacking screw hole and the guide pin top tight.

The hollow screwdriver capable of fixing the guide pin, the outer wall of the sleeve of the base and the inner wall of the sleeve hole of the handle are both smooth surfaces, and the outer wall of the sleeve of the base and the inner wall of the sleeve hole of the handle are in sliding fit.

The above-mentioned hollow screw driver capable of fixing the guide pin has threads respectively on the outer wall of the casing of the base and the inner wall of the casing hole of the handle, and the threads of the outer wall of the casing of the base match the threads of the inner wall of the casing hole of the handle.

The above-mentioned hollow screwdriver capable of fixing a guide pin has a connection hole for installing a handle on one side of the base, and one end of the handle is inserted into the connection hole, and the handle and the connection hole are detachably connected.

The above-mentioned hollow screw driver that can fix the guide pin, the lower cylinder of the guide pin is processed into two opposite parallel planes, the plane of the lower part of the guide pin is opposite to the tightening screw hole of the base, and the tightening bolt passes through the tightening screw hole and rests on the on the plane below the guide pin.

The beneficial effects of the utility model are:

The utility model changes the screwdriver handle into a two-body structure, the handle at the upper part of the screwdriver handle can still be inserted into the hollow screw, and the base at the lower part of the screwdriver handle can fix the guide pin to prevent the guide pin from rotating, so that when the hollow screw is screwed in , the guide pin will not advance accordingly, avoiding the accident that the guide pin penetrates the femoral head forward and destroys the articular surface, and even penetrates into the pelvic cavity. The utility model has the advantages of simple structure and convenient use, which can prevent the guide needle from advancing along with the hollow screw, avoid operation accidents and complications, and solve the relatively common phenomenon in the hollow screw fixation operation of the femoral neck fracture. , can guarantee the safety of the operation, and provide a reliable guarantee for improving the quality of the operation.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is another kind of structural representation of the utility model;

Fig. 3 is a schematic diagram of the use state of the utility model.

The markings in the figure are as follows: Screwdriver rod 1, Guide pin hole 2, Handle 3, Base 4, Sleeve 5, Sleeve hole 6, Jacking screw hole 7, Jacking bolt 8, Connection hole 9, Handle 10, Guide pin 11 , hollow screw 12.

detailed description

The utility model comprises a screwdriver rod 1 and a screwdriver handle, the screwdriver handle is connected to the rear end of the screwdriver rod 1, along the central axis of the screwdriver rod 1 and the screwdriver handle, there is a guide pin hole 2 through which a guide pin 11 passes. This structure is different from the existing Technology is no different. The improvement of the utility model is that the screwdriver handle is changed into a two-body structure, the handle 3 at the front still completes the operation of inserting the hollow screw 12 forward, and the base 4 at the rear realizes the fixing of the guide pin 11 to prevent the guide pin 11 turns.

As shown in the figure, the screwdriver handle is a two-body structure consisting of a handle 3 and a base 4 . The base 4 is located at the rear of the handle 3 , the upper end of the base 4 has a sleeve 5 , and the lower end of the sleeve 5 is connected with the guide pin hole 2 of the base 4 . Correspondingly, the lower end surface of the handle 3 has a sleeve hole 6 along the axis of the guide needle hole 2, the inner diameter of the sleeve hole 6 matches the outer diameter of the sleeve 5, and the sleeve 5 is along the lower end of the handle 3. The casing hole 6 is inserted into the handle 3 , the casing 5 can rotate in the casing hole 6 , and the inner diameter of the casing 5 matches the inner diameter of the guide pin hole 2 of the base 4 and the handle 3 .

As shown in the figure, a matching structure of the sleeve 5 of the base 4 and the sleeve hole 6 of the handle 3 is that the outer wall of the sleeve 5 and the inner wall of the sleeve hole 6 are smooth surfaces, and the outer wall of the sleeve 5 and the sleeve hole 6 are smooth. The inner wall is a sliding fit. The handle 3 of this structure has no restriction when rotating, and the operator can exert pressure on the front end of the handle 3 connected to the screwdriver rod 1 according to his own feeling.

As shown in the figure, another matching structure of the casing 5 of the base 4 and the casing hole 6 of the handle 3 is that the outer wall of the casing 5 and the inner wall of the casing hole 6 have threads respectively, and the threads of the outer wall of the casing 5 are connected with the casing hole. 6 inner wall threads match. The handle 3 of this structure is constrained by the threads of the sleeve 5 and the sleeve hole 6 when rotating, and is forced to move forward to obtain a better forward effect.

As shown in the figure, in order to realize the fixation of the base 4 to the guide pin 11 and prevent the guide pin 11 from rotating, there is a tightening screw hole 7 on the side of the base 4, and the tightening screw hole 7 is connected to the side wall of the guide pin hole 2 in the base 4 Connected, the tightening bolt 8 passes through the tightening screw hole 7 and tightens with the guide pin 11 in the guide pin hole 2 .

In order to make the tightening bolt 8 firmly tighten the guide pin 11, the lower cylinder of the guide pin 11 can be processed into two opposite parallel planes, the plane of the lower part of the guide pin 11 is opposite to the tightening screw hole 7 of the base 4, and The tightening bolt 8 passes through the tightening screw hole 7 and pushes against the plane of the guide pin 11 bottom.

As shown in the figure, in order to prevent the base 4 from rotating together with the guide pin 11, there is a connecting hole 9 for installing the handle 10 on one side of the base 4, and one end of the handle 10 is inserted into the connecting hole 9, and the handle 10 and the connecting hole 9 are detachable The connection can be a threaded connection, or a tapered plug-in connection of the rod body of the handle 10 , so as to prevent the handle 10 from slipping out of the connecting hole 9 . During use, the operator rotates the handle 3 with one hand to screw in the hollow screw 12, and holds the handle 10 with the other hand to prevent the base 4 from rotating with the guide pin 11, so that the hollow screw 12 can move forward smoothly. The space between the guide pins 11 is filled by tissue, and the guide pins 11 will not follow and advance.

The utility model is not only limited to the treatment of femoral neck fractures in actual use, but also can be used in other parts that need to be inserted into the hollow screw 12 along the guide pin 11, so as to prevent the guide pin 11 from rotating and follow the hollow screw 12. Move forward together.

Claims (5)

1. a kind of can be with the hollow screw screwdriver of fixation guide pin, it includes screwdriver bar（1）, screwdriver handle, screwdriver handle is connected to screwdriver Bar（1）Rear end, along screwdriver bar（1）There is guide pin with the central axial line of screwdriver handle（11）The guide pinhole passed through（2）, its feature exists In：Screwdriver handle is by handle（3）And base（4）The bi-body structure of composition, base（4）Positioned at handle（3）Rear portion, base（4） There is sleeve pipe upper end（5）, sleeve pipe（5）Lower end and base（4）Guide pinhole（2）It is connected, handle（3）Lower surface has along guide pin Hole（2）The collar aperture of axis（6）, collar aperture（6）Internal diameter and base（4）Sleeve pipe（5）External diameter match, base（4）'s Sleeve pipe（5）Along handle（3）The collar aperture of lower end（6）Insert handle（3）In, sleeve pipe（5）Internal diameter and base（4）And handle （3）Guide pinhole（2）Internal diameter matches, in base（4）Side hold out against screw（7）, hold out against screw（7）With base（4）In Guide pinhole（2）Side wall is connected, puller bolt（8）Through holding out against screw（7）With guide pinhole（2）In guide pin（11）Hold out against.

2. according to claim 1 can be with the hollow screw screwdriver of fixation guide pin, it is characterised in that：The base（4）'s Sleeve pipe（5）Outer wall and handle（3）Collar aperture（6）Inwall is smooth surface, base（4）Sleeve pipe（5）Outer wall and handle （3）Collar aperture（6）Inwall with to be slidably matched.

3. according to claim 1 can be with the hollow screw screwdriver of fixation guide pin, it is characterised in that：The base（4）'s Sleeve pipe（5）Outer wall and handle（3）Collar aperture（6）There are screw thread, base on inwall respectively（4）Sleeve pipe（5）Outer wall thread and hand Handle（3）Collar aperture（6）Inner thread is engaged.

4. according to Claims 2 or 3 can be with the hollow screw screwdriver of fixation guide pin, it is characterised in that：The base（4） Side have mounting knob（10）Connecting hole（9）, handle（10）One end be inserted into connecting hole（9）In, handle（10）With connecting Connect hole（9）To be detachably connected.

5. according to claim 4 can be with the hollow screw screwdriver of fixation guide pin, it is characterised in that：Guide pin（11）Bottom Cylinder is processed as two relative parallel planes, guide pin（11）The plane and base of bottom（4）Hold out against screw（7）Relatively, Puller bolt（8）Through holding out against screw（7）Withstand on guide pin（11）In the plane of bottom.