CN210277319U

CN210277319U - Connecting sleeve for fixing spine

Info

Publication number: CN210277319U
Application number: CN201920820070.XU
Authority: CN
Inventors: 谭磊; 孙德修; 孙硕
Original assignee: Shandong Hangwei Orthopedics Medical Instrument Co Ltd
Current assignee: Shandong Hangwei Orthopedics Medical Instrument Co Ltd
Priority date: 2019-06-03
Filing date: 2019-06-03
Publication date: 2020-04-10
Anticipated expiration: 2029-06-03

Abstract

The utility model discloses a connecting sleeve for fixing a spine, which comprises a sleeve, a rod and a nut, wherein one end of the sleeve is provided with an inner hole and an external thread, the other end of the sleeve is provided with a rod A which protrudes outwards, one end of the rod is inserted into the inner hole, the part inserted into the inner hole is matched with the inner hole to be in a rotation stopping mode, the rod is only allowed to axially slide relative to the sleeve pipe and is not allowed to rotate or shake, the other end of the rod is provided with a rod B in an outward protruding way, a step is arranged at the junction of the inserting part and the rod B, the nut is sleeved on the rod B, and is connected with the external thread of the sleeve, the inserting part of the rod is pushed into the inner hole to play a role of pressurizing for drawing the distance between the two ends of the fracture in the operation, and the rod and the sleeve can not be separated, the rod A and the rod B are respectively connected with the pedicle screws at two ends of the fracture line, a support is arranged between the sleeve and the rod, and the support is made of absorbable material or elastic material.

Description

Connecting sleeve for fixing spine

Technical Field

The utility model relates to the field of medical equipment, especially a spinal fixation uses adapter sleeve

Background

The spine fixer is used for fixing and treating the spine in the spine injury operation, the spine fixer generally comprises a longitudinal rod and two pedicle screws, the longitudinal rod is an integral rod, the pedicle screws are required to be 2 at least, the spines at two ends of a spine fracture line are respectively driven into the spines, and then the longitudinal rod is fixedly connected with the two pedicle screws so as to fix the spines at two ends of the spine fracture line and achieve the purpose of fixing and treating.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a fixed adapter sleeve that uses of backbone has overcome above-mentioned defect, a fixed adapter sleeve that uses of backbone replaces indulge even stick, connect the pedicle of vertebral arch nail of squeezing into backbone broken line both ends vertebra, make the backbone fixer has the function of letting produce discontinuity pressure between the fracture face. The connecting sleeve for fixing the spine comprises a sleeve, a rod and a screw cap, wherein one end of the sleeve is provided with an inner hole and an outer thread which are in the same direction as the axis of the sleeve, the other end of the sleeve protrudes outwards to be provided with a rod A, one end of the rod is inserted into the inner hole, the part of the inserted inner hole is matched with the inner hole to be in a rotation stopping form, such as a rotation stopping structure of a square shape, a flower shape, a rotation stopping pin and the like, the rod is only allowed to slide axially relative to the sleeve and is not allowed to rotate and rock, the other end of the rod protrudes outwards to be provided with a rod B, a step is arranged at the junction of the inserted part and the rod B, the rod B is radially smaller than the inserted part, the screw cap is sleeved on the rod B and is connected with the outer thread of the sleeve, the inserted part of the rod is pushed into the inner hole to play a role of pressurizing role in drawing the distance between two ends of the fracture in an, the device is characterized in that a support piece is arranged between the sleeve and the rod, and the support piece is made of absorbable material or elastic material.

The absorbable material is polylactic acid or magnesium-titanium alloy, and the elastic material is memory alloy which can be implanted into a human body.

For a comminuted fracture patient, the fracture surface can not bear self gravity within 3 months generally after operation, the comminuted fracture patient can bear the comminuted fracture after 3 months, in order to enable the patient to move to promote fracture healing as early as possible, an 'absorbable material' supporting piece is used and is padded between the sleeve and the rod, the 'absorbable material' supporting piece has the strength of supporting the body weight of the patient, the 'absorbable material' supporting piece is decomposed and absorbed by the human body after being implanted into the human body for 3 months, therefore, the patient can move to the lower side after the operation, the fracture surface can be slightly contacted with the absorbable material to stimulate the growth of bones, the 'absorbable material' is gradually absorbed by the human body after 3 months, a space is generated between the sleeve and the rod, and when the patient moves vertically, the self weight can intermittently pressurize the. The support height of the absorbable material support is preferably 2 mm.

For non-comminuted fracture patients, the fracture surface can bear smaller pressure, the elastic material is used as a support piece to be padded between the sleeve and the rod, and the fracture surface is assisted to bear the gravity of the body of the patient after operation, so that the patient can move up and down after operation to promote fracture healing. The elastic material supporting piece is a spring, and can be set into various specifications according to different weights of patients for selection of doctors.

Drawings

Fig. 1 is a schematic structural view of a split component of a connection sleeve for spinal fixation according to the present invention;

fig. 2 is a schematic view of the overall structure of a connection sleeve for fixing a spine.

The specific implementation mode is as follows:

FIG. 1-FIG. 2 show a specific embodiment of a connection sleeve for fixing a spine according to the present invention, which comprises a sleeve 1, a rod 3 and a nut 4, wherein one end of the sleeve 1 is provided with an inner hole and an outer thread in the same direction as the axis of the sleeve 1, the other end of the sleeve protrudes outwards to be provided with a rod A, one end of the rod 3 is inserted into the inner hole, the part of the inserted inner hole is matched with the inner hole to be a rotation stopping structure, such as a square, flower-shaped, rotation stopping pin, etc., only allowing the rod 3 to slide axially relative to the sleeve, not allowing rotation and shaking, the other end of the rod 3 protrudes outwards to be provided with a rod B, the interface between the inserted part and the rod B is provided with a step, the rod B is radially smaller than the inserted part, the nut 4 is sleeved on the rod B and connected with the outer thread of the sleeve 1, and pushes the inserted part of the rod 3 into the inner hole, the device has the advantages that the device has the pressurizing effect of drawing the distance between two ends of the fracture in the operation, the rod 3 cannot be separated from the sleeve 1, the rod A and the rod B are respectively connected with pedicle screws at two ends of the fracture line, and the device is characterized in that a support part 2 is arranged between the sleeve 1 and the rod 3, and the support part 2 is made of absorbable materials or elastic materials. The absorbable material is polylactic acid or magnesium-titanium alloy, and the elastic material is memory alloy which can be implanted into a human body. For a comminuted fracture patient, the fracture surface can not bear self weight within 3 months generally after operation, the comminuted fracture patient can bear the weight after 3 months, in order to enable the patient to move as early as possible to promote fracture healing, an 'absorbable material' support is used and is padded between the sleeve 1 and the rod 3, the 'absorbable material' support has the strength of supporting the body weight of the patient, and the support starts to be decomposed and absorbed by the human body after being implanted into the human body for 3 months, so that the patient can move down after operation, the fracture surface can slightly contact with the bone to stimulate the growth of the bone, the 'absorbable material' is gradually absorbed by the human body after 3 months, a space is generated between the sleeve 1 and the rod 3, and when the patient moves up, the self weight can intermittently pressurize the fracture surface to promote the rapid healing of the fracture. The support height of the absorbable material support is preferably 2 mm.

For non-comminuted fracture patients, the fracture surface can bear smaller pressure, the elastic material is used as a support piece to be padded between the sleeve 1 and the rod 3, and the fracture surface is assisted to bear the gravity of the body of the patient after operation, so that the patient can move up and down after operation to promote fracture healing. The elastic material supporting piece is a spring, and can be set into various specifications according to different weights of patients for selection of doctors.

Claims

1. The utility model provides a fixed adapter sleeve that uses of backbone, includes sleeve pipe (1), stick (3) and nut (4), sleeve pipe (1) one end is equipped with hole and external screw thread, and the outside protrusion of the other end is equipped with pole A, the hole is inserted to stick (3) one end, and the outside protrusion of the other end is equipped with pole B, stick (3) are inserted the inner hole part and are equipped with the step with pole B juncture, nut (4) overlap in on the pole B with the external screw thread connection of sleeve pipe (1), will the inner hole part that inserts of stick (3) pushes the hole, pole A and pole B are connected with the pedicle of vertebral arch nail at broken line both ends respectively, its characterized in that be equipped with support piece (2) between sleeve pipe (1) and stick (3).

2. A spinal fixation connection sleeve according to claim 1, characterized in that the rod (3) is inserted into the inner bore portion and arranged to be locked against rotation in cooperation with the inner bore.

3. A spinal fixation connection sleeve according to claim 1, characterised in that said support member (2) is provided as an absorbable or elastic material.

4. The spinal fixation adapter sleeve of claim 3 wherein said resorbable material support member has a support height of 2 mm.

5. The adapter sleeve for spinal fixation according to claim 3, wherein said elastic material support member is provided in a plurality of sizes according to the weight of the patient.