CN216985121U - Reduction surgical instrument for dentata vertebral fracture - Google Patents

Abstract

The utility model belongs to the technical field of medical instrument and specifically relates to a reduction of epistropheus centrum fracture surgical instruments is related to, including the release link, release link one end processing has the external screw thread that is used for with epistropheus centrum threaded connection, sliding connection has a section of thick bamboo that resets on the release link, threaded connection has reset nut on the release link, reset nut is located a section of thick bamboo that resets is kept away from the one end of release link processing screw thread, reset nut with a section of thick bamboo that resets rotates to be connected in order to drive a section of thick bamboo that resets slides. This application has the effect that can carry out the rapid stabilization to the dentata centrum that shifts and reset.

Description

Axis vertebral body fracture reduction surgical instruments

technical field

The present application relates to the field of medical devices, and in particular, to a surgical instrument for reducing fractures of an axial vertebral body.

Background technique

The fracture site of the axial vertebral body is located between the base of the odontoid process and the bilateral pedicles, because the anterior half of the axial vertebral body together with the atlas is displaced forward, while the posterior fracture fragments of the axial vertebral body remain in the original position. position, thereby creating a risk of spinal cord compression.

The treatment of axial vertebral body fractures should still be based on conservative treatment, and different treatments should be adopted according to the unique injury mechanism of each patient. For patients with no nerve damage and no obvious displacement, plaster immobilization is performed; for patients with displacement and cannot be reduced, in order to prevent long-term instability, deformity fusion and degenerative atlantoaxial arthritis, reduction and fusion are mainly used. When performing reduction and fusion, how to quickly and stably reduce the displaced axial vertebral body is the key to the success of the operation.

Utility model content

In order to realize rapid and stable reduction of the displaced axial vertebral body, the present application provides an axial vertebral body fracture reduction surgical instrument.

An axial vertebral body fracture reduction surgical instrument provided by the application adopts the following technical scheme:

A pivot vertebral body fracture reduction surgical instrument, comprising a reset rod, one end of the reset rod is processed with an external thread for threaded connection with the pivot vertebral body, the reset rod is slidably connected with a reset cylinder, and the reset rod is on the A reset nut is threadedly connected, the reset nut is located at one end of the reset cylinder away from the processing thread of the reset rod, and the reset nut is rotatably connected with the reset cylinder to drive the reset cylinder to slide.

By adopting the above technical solution, when in use, the reset rod is directly penetrated on the front half of the displaced pivot vertebral body in turn, and finally screwed on the rear side of the pivot vertebral body, and then the reset nut is screwed, and the reset nut will Drive the reset cylinder to move on the reset rod, so as to push the displaced front half of the pivot vertebral body toward the rear of the pivot vertebral body through the reset cylinder, so as to realize the reset of the front half of the pivot vertebral body. The reduction rod in the front half of the axis will play a guiding role, and the reduction is very convenient and stable.

Optionally, one end of the reset cylinder toward the reset nut is bent inward to form a first retaining portion, and the reset nut includes a threaded cylinder threaded on the reset rod and a threaded cylinder fixed on the threaded cylinder. The rotating cylinder on the outer wall, the threaded cylinder protrudes from the end of the rotating cylinder toward the reset cylinder and is bent outward to form a second locking portion, the second locking portion and the rotating cylinder are connected. A card slot into which the first card position portion is embedded is formed therebetween.

By adopting the above technical solution, when the reset nut rotates, the reset cylinder will be driven to reciprocate on the reset rod through the cooperation of the locking groove and the first locking portion, and the operation is very convenient.

Optionally, a reinforcing cylinder is fixedly connected to one end of the first latching portion facing the reset nut, and an end of the rotating cylinder facing the latching groove is provided with an embedding groove into which the reinforcing cylinder is embedded.

By adopting the above technical solution, the reinforcing cylinder can strengthen the support strength of the first clamping part, and avoid the first clamping part being overstressed and breaking when the reset nut drives the reset cylinder to slide on the reset rod through the first clamping part.

Optionally, an anti-skid groove is processed on the outer wall of the drum.

By adopting the above technical solution, it is convenient for the doctor to rotate the drum.

Optionally, an auxiliary cylinder is fixedly connected to the inner wall of the reset cylinder, and the reset rod includes a mounting rod threadedly connected with the reset nut and a limit rod slidably matched with the auxiliary cylinder. It is not a perfect circle to limit the rotation of the auxiliary cylinder around the limit rod.

By adopting the above technical solution, the cross-section of the limit rod is non-circular, so that the auxiliary cylinder can slide along the length direction of the limit rod, but cannot rotate around the limit rod, so as to prevent the reset cylinder from abutting the displaced pivot vertebral body for reset When the reset cylinder rotates relative to the pivot vertebral body, the displaced pivot vertebral body is worn.

Optionally, the reset rod further includes a guide rod fixed on one end of the limit rod away from the installation rod, and the diameter of the guide rod is smaller than the diameter of the installation rod.

By adopting the above technical solution, the larger diameter of the installation rod can have sufficient supporting force, and the smaller diameter of the guide rod can reduce the damage to the human body's axis.

Optionally, a handle is provided at an unthreaded end of the reset rod.

By adopting the above technical solution, it is convenient for the doctor to operate the reset rod by the handle and screw it on the axis of the vertebral body.

To sum up, the present application includes at least one of the following beneficial technical effects:

1. Through the cooperation of the reset rod, the reset cylinder and the reset nut, when the displaced pivot vertebral body needs to be reset, the reset rod is directly threaded on the displaced pivot vertebral body, and finally screwed on the undisplaced pivot vertebral body. The rear section of the displaced axis vertebral body can be driven by the reset nut to slide the reset cylinder on the reset rod, and the displaced axis vertebral body can be reset through the reset cylinder;

2. The setting of the threaded cylinder and the rotating cylinder enables a slot for the first clamping part to be embedded between the two. While realizing the rotational connection between the reset nut and the reset cylinder, it can also drive the reset cylinder to reciprocate along the length of the reset rod. Mobile, more convenient and flexible operation;

3. The setting of the auxiliary cylinder can fix the circumferential position of the reset cylinder, so as to prevent the reset nut from driving the reset cylinder to rotate when the displaced pivot vertebral body is pushed, which may cause damage to the pivot vertebral body. wear.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of the present application.

FIG. 2 is a schematic cross-sectional front view of the present application.

FIG. 3 is a partial cross-sectional schematic diagram to illustrate the connection method of the reset cylinder and the reset nut.

Description of reference numerals: 1. Reset rod; 11. Screw head; 12. Installation rod; 13. Limit rod; 14. Guide rod; 15. Auxiliary rod; Cylinder; 21. The first locking part; 22. Auxiliary cylinder; 23. Reinforcing cylinder; 3. Reset nut; Card slot; 35. Embedded slot; 4. Handle.

Detailed ways

The present application will be further described in detail below in conjunction with accompanying drawings 1-3.

The embodiment of the present application discloses an axial vertebral body fracture reduction surgical instrument. 1, the pivot vertebral body fracture reduction surgical instrument comprises a reduction rod 1, a reduction cylinder 2 slidably connected to the reduction rod 1, and a reduction nut 3 threadedly connected to the reduction rod 1, and one end of the reduction rod 1 is processed with an external thread. The screw head 11 is formed. The reset nut 3 is located at the end of the reset cylinder 2 away from the screw head 11 . When the displaced axis vertebral body needs to be reset, the reduction rod 1 is directly passed through the displaced axis vertebral body, and finally the screw head 11 is screwed on the undisplaced axis vertebral body. The displaced pivot vertebral body will be sleeved on the reset rod 1 and located between the undisplaced pivot vertebral body and the reset cylinder 2, and then screw the reset nut 3, and the reset nut 3 will be pushed and displaced by the reset cylinder 2. The positioned axis vertebral body moves to the direction of the undisplaced axis vertebral body, thereby realizing the reduction of the axis vertebral body. During the process that the reduction cylinder 2 pushes the axis to reduce the vertebral body, the reduction rod 1 will also play a guiding role, making the reduction more stable.

2 and 3 , one end of the reset cylinder 2 is bent inward toward the reset nut 3 to form a first retaining portion 21 . The reset nut 3 includes a threaded cylinder 31 threadedly connected to the reset rod 1 and sleeved and fixed on the thread. The rotating cylinder 32 at the outer wall of the cylinder 31, wherein the threaded cylinder 31 extends out of the threaded cylinder 31 toward the end of the reset cylinder 2 and is bent outward to form a second retaining portion 33, and the second retaining portion 33 and the threaded cylinder 31 are facing the reset cylinder. A card slot 34 for the first locking portion 21 to be embedded in is formed between one end of the 2 , and the rotation connection of the reset cylinder 2 and the reset nut 3 can be realized by inserting the first locking portion 21 into the card groove 34 . When the reset nut 3 is screwed, the reset nut 3 will drive the reset cylinder 2 to slide along the length direction of the reset rod 1 through the cooperation of the first retaining portion 21 and the retaining groove 34, thereby pushing and pushing the pivot vertebral body to reset.

Wherein, in order to avoid that when the reset nut 3 drives the reset cylinder 2 to slide through the first latching portion 21, the first latching portion 21 is deformed or broken due to force, and the first latching portion 21 is fixed on the side away from the reset cylinder 2. The reinforcement cylinder 23 is connected, the reinforcement cylinder 23 is sleeved on the reset rod 1, and the end of the rotating cylinder 32 facing the clamping groove 34 is provided with an embedding groove 35 for the reinforcement cylinder 23 to be embedded in. The reinforcement cylinder 23 can increase the first clamping part. 21 for the support strength.

1, in order to facilitate the staff to rotate the drum 32, an anti-slip groove 321 is processed on the outer wall of the drum 32. The staff can rotate the drum 32 by holding the anti-slip groove 321 on the drum 32, which is more convenient to rotate.

Referring to FIG. 2 , the reset rod 1 can be made of medical stainless steel or titanium alloy, including a mounting rod 12 threadedly connected to the threaded barrel 31 , a limit rod 13 integrally fixed to one end of the installation rod 12 , and a limit rod 13 integrally fixed to the limit rod 13 The guide rod 14 at one end away from the installation rod 12, the screw head 11 is located at the end of the guide rod 14 away from the limit rod 13, the diameter of the guide rod 14 is smaller than the diameter of the installation rod 12, so that the installation rod 12 has sufficient supporting strength, and the guide rod 14 can cause less damage to the pivot vertebral body when it is worn on the displaced pivot vertebral body.

2 and 3, the reset cylinder 2 is slidably connected to the limit rod 13. Specifically, an auxiliary cylinder 22 is fixed on the inner wall of the reset cylinder 2. The longitudinal section of the limit rod 13 is non-circular, and the auxiliary cylinder 22 is slidably sleeved on the limit rod 13, thereby fixing the axial position of the reset cylinder 2 through the auxiliary cylinder 22, so that the reset cylinder 2 can only slide along the length of the reset rod 1 with the reset nut 3 on the reset rod 1, and It cannot be rotated with the reset nut 3, so as to avoid the rotation of the reset cylinder 2 when the pivot vertebral body is pushed, thereby causing wear on the contact between the pivot vertebral body and the reset cylinder 2. Wherein, the longitudinal section of the limiting rod 13 may be oval, polygonal, or special-shaped, etc., as long as the axial limiting of the reset cylinder 2 can be achieved.

2, an auxiliary rod 15 is fixedly connected to the end of the installation rod 12 away from the limit rod 13, and a handle 4 is provided at the end of the auxiliary rod 15 away from the installation rod 12. When the reset rod 1 is screwed on the pivot vertebral body At this time, the staff can directly operate the handle 4 to operate the reset rod 1 to rotate, so as to screw the reset rod 1 on the pivot vertebral body.

The handle 4 may be directly fixed on the auxiliary rod 15, and the handle 4 may also be detachably connected to the auxiliary rod 15, which is not limited herein.

The implementation principle of an axial vertebral body fracture reduction surgical instrument according to the embodiment of the present application is as follows: during the operation, one end of the screw head 11 of the reduction rod 1 faces the displaced axial vertebral body and penetrates the displaced axial vertebral body. Then screw the end of the screw head 11 on the undisplaced pivot vertebral body, and operate the end of the reset cylinder 2 away from the reset nut 3 to abut on the side wall of the displaced pivot vertebral body, and screw The reset nut 3 is used to press the reset cylinder 2 with the force of the reset nut 3, and the reset cylinder 2 will also push the displaced pivot vertebral body to the direction of the undisplaced pivot vertebral body to complete the reset of the pivot vertebral body. .

The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore: all equivalent changes made according to the structure, shape and principle of the present application should be covered within the scope of the present application. Inside.

Claims (7)

1. A pivot vertebral body fracture reduction surgical instrument is characterized in that: comprising a reset rod (1), one end of the reset rod (1) is processed with an external thread for threaded connection with the pivot vertebral body, the reset rod (1) A reset cylinder (2) is slidably connected thereon, a reset nut (3) is threadedly connected to the reset rod (1), and the reset nut (3) is located in the reset cylinder (2) away from the reset rod (1) One end of the thread is processed, and the reset nut (3) is rotatably connected with the reset cylinder (2) to drive the reset cylinder (2) to slide. 2. The surgical instrument for reducing the fracture of the axis of the vertebral body according to claim 1, characterized in that: one end of the reduction cylinder (2) toward the reduction nut (3) is bent inward to form a first retaining portion ( 21), the reset nut (3) comprises a threaded cylinder (31) threaded on the reset rod (1) and a rotating cylinder (32) fixed on the outer wall of the threaded cylinder (31), the The threaded cylinder (31) protrudes from the end of the rotating cylinder (32) toward one end of the reset cylinder (2) and is bent outward to form a second latching portion (33), the second latching portion (33) ) and the rotating drum (32), a card slot (34) into which the first locking portion (21) is embedded is formed. 3. The surgical instrument for reducing the fracture of the pivot vertebral body according to claim 2, wherein a reinforcing cylinder (23) is fixedly connected to one end of the first retaining portion (21) facing the reduction nut (3). An inserting groove (35) for inserting the reinforcing cylinder (23) is provided at one end of the rotating drum (32) facing the clamping groove (34). 4 . The surgical instrument for reducing the fracture of the axis and vertebral body according to claim 2 , wherein an anti-slip groove ( 321 ) is processed on the outer wall of the rotating drum ( 32 ). 5 . 5. The surgical instrument for reducing the fracture of the axis of the vertebral body according to claim 1, characterized in that: an auxiliary cylinder (22) is fixedly connected to the inner wall of the reduction cylinder (2), and the reduction rod (1) comprises an auxiliary cylinder (22). The installation rod (12) threadedly connected with the reset nut (3) and the limit rod (13) slidably matched with the auxiliary cylinder (22), the limit rod (13) has a non-circular section to limit the The auxiliary cylinder (22) rotates around the limit rod (13). 6 . The surgical instrument for reducing the fracture of the pivot vertebral body according to claim 5 , wherein the reduction rod ( 1 ) further comprises a fixing rod ( 13 ) that is fixedly connected to the limiting rod ( 13 ) away from the installation rod ( 12 ). 7 . One end of the guide rod (14), the diameter of the guide rod (14) is smaller than the diameter of the installation rod (12). 7 . The surgical instrument for reducing the fracture of the pivotal vertebral body according to claim 1 , wherein a handle ( 4 ) is provided at one end of the reduction rod ( 1 ) without threads. 8 .

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