CN209864010U

CN209864010U - Multi-shaft pedicle screw imbedding device

Info

Publication number: CN209864010U
Application number: CN201920396161.5U
Authority: CN
Inventors: 袁超
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-26
Filing date: 2019-03-26
Publication date: 2019-12-31
Anticipated expiration: 2029-03-26

Abstract

The utility model discloses a multiaxial pedicle screw imbedding device, which comprises a screw, a screw fixing device, an expansion sleeve and a driving shaft; the expansion sleeve is connected with the screw through the screw fixing device, and the axial center parts of the expansion sleeve, the screw fixing device and the screw are all provided with accommodating cavities which are communicated up and down; the driving shaft is inserted in the expansion sleeve; the screw comprises a screw body with threads and a spherical screw head; a plurality of outlets communicated with the accommodating cavity are formed in the lower body wall of the screw body; the upper end of the screw head is provided with a screw head groove; the screw head groove is communicated with the accommodating cavity, and a first vertical groove is formed in the side wall of the screw head groove. The utility model avoids the abrasion problem and the butt joint problem with the screw; the transmission effect is better; the types and the number of the instruments are reduced, the preparation process of the operation is simplified, and the risk of misoperation is reduced; the operation procedure is simplified, thereby reducing the anesthesia time of the patient and reducing the operation risk.

Description

Multi-shaft pedicle screw imbedding device

Technical Field

The utility model relates to a device especially relates to a multiaxis pedicle of vertebral arch screw puts into device.

Background

The use of pedicle screw technology in spinal surgery is quite common and is also commonly used for percutaneous spinal fixation. The percutaneous spinal internal fixation has less disturbance to the paraspinal muscles and is minimally invasive due to the special connecting rod implantation technology. Compared with the traditional open surgery, the minimally invasive technique has the advantages of simple and convenient operation, small wound, less bleeding, quick recovery and the like. However, in the actual operation process, the used instruments and parts are numerous and are easy to lose, so that the preoperative preparation pressure is high, the driving element and the screw are of a separated structure, the disinfection is convenient, the screw can be used repeatedly, the butt joint of the driving element and the screw is time-consuming in the use process, the end part of the driving element is abraded by the disinfectant and the normal use, the torque transmission is reduced, the screw cannot be forced, and the operation time is further prolonged. Accordingly, prolonged procedure time necessitates increased anesthesia measures, which increases the risk of the procedure.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects existing in the technology, the utility model provides a multiaxis pedicle screw imbedding device.

In order to solve the technical problem, the utility model discloses a technical scheme is: a multi-axial pedicle screw imbedding device comprises a screw, a screw fixing device, an expansion sleeve and a driving shaft; the expansion sleeve is connected with the screw through the screw fixing device, and the axial center parts of the expansion sleeve, the screw fixing device and the screw are all provided with accommodating cavities which are communicated up and down; the driving shaft is inserted in the expansion sleeve;

the screw comprises a screw body with threads and a spherical screw head; a plurality of outlets communicated with the accommodating cavity are formed in the lower body wall of the screw body; the upper end of the screw head is provided with a screw head groove; the screw head groove is communicated with the accommodating cavity, and a first vertical groove is formed in the side wall of the screw head groove;

the upper end of the screw fixing device is provided with a fixing groove, and the lower end of the screw fixing device is provided with an inward-protruding clamping piece; the clamping piece clamps the screw head inside the screw fixing device; a fixing ring is arranged inside the screw fixing device; the fixing ring is positioned at the upper end of the screw head and is in threaded connection with the screw fixing device; a second vertical groove is formed in the inner side wall of the fixing ring; a vertical connecting piece is fixedly connected in the fixed groove;

a through hole which penetrates through the driving shaft in the axial direction is formed in the driving shaft; the upper end of the driving shaft extends out of the self-expanding sleeve and is fixedly connected with a transverse handle, and the lower end of the driving shaft is sequentially provided with a first paddle and a second paddle from top to bottom; the blades of the first paddle are inserted into the second vertical groove; the blades of the second paddle are inserted into the first vertical groove.

Furthermore, the expansion sleeve is formed by splicing a first cylinder piece and a second cylinder piece; the first horn piece and the second horn piece are fixed together through a fixing cap; the lower ends of the first cylinder piece and the second cylinder piece are fixedly connected with elastic pieces; the lower end of the elastic sheet is inserted into the connecting piece, and the outer diameter of the elastic sheet is larger than the inner diameter of the connecting piece.

Further, the inner side wall of the connecting piece is provided with threads.

Further, the blade length of the first blade is greater than or equal to the blade length of the second blade.

Furthermore, the lower end of the fixing ring is sunken upwards, and the sunken curved surface is matched with the spherical curved surface of the screw head.

The utility model, because the disposable driving shaft is pre-installed on the screw, avoids the abrasion problem caused by repeatedly using the driving element in the prior art, also solves the butt joint problem of the driving element and the screw in the prior art, and reduces the butt joint time; the first paddle of the driving shaft can realize the replacement of a single-shaft screw and a multi-shaft screw at any time; the second paddle is inserted into the screw head, so that the transmission effect is better than that of the prior art, and the torque output cannot be reduced; the use of the expansion device and the disinfection of the driving element in the prior art are replaced, so that the types and the number of instruments are reduced, the preparation process of the operation is simplified, and the misoperation risk is reduced; the operation of installing the driving element and the expansion device on the screw is eliminated, the operation procedure is simplified, the anesthesia time of the patient can be reduced, and the operation risk is reduced.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

In the figure: 1. a screw fixing device; 2. expanding the sleeve; 3. a drive shaft; 4. a screw body; 5. a screw head; 6. an outlet; 7. a screw head recess; 8. a fixing cap; 9. a fastener; 10. a fixing ring; 11. a spring plate; 12. a connecting member; 13. a first blade; 14. and a second blade.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 shows a polyaxial pedicle screw implanting device, which includes a screw, and further includes a screw fixing device 1, an expansion sleeve 2, and a driving shaft 3; the expansion sleeve 2 is connected with the screw through a screw fixing device, and the axial center parts of the expansion sleeve, the screw fixing device and the screw are provided with accommodating cavities which are communicated up and down; the drive shaft 3 is inserted inside the expansion sleeve.

The screw comprises a screw body 4 with threads and a spherical screw head 5; the screw body is used as an anchoring part of the device, and the screw head is spherical and can be clamped in the screw fixing device and can move in multiple axes; a plurality of outlets 6 communicated with the accommodating cavity are formed in the lower body wall of the screw body, and the accommodating cavity and the outlets in the screw body can be used for conveying and releasing bone cement; the upper end of the screw head is provided with a screw head groove 7 which is used for accommodating a driving shaft; the screw head groove is communicated with the accommodating cavity to facilitate the transportation of bone cement, and the side wall of the screw head groove is provided with a vertical groove which provides torque support for the driving shaft.

The upper end of the screw fixing device is provided with a fixing groove, and the lower end of the screw fixing device is provided with an inward-protruding clamping piece 9; the clamping piece clamps the screw head in the screw fixing device and can fix the inclined screw so as to prevent the inclination angle of the screw from changing in the use process of the multi-axis screw; a fixing ring 10 is arranged in the screw fixing device; the fixing ring is positioned at the upper end of the screw head and is in threaded connection with the screw fixing device, the fixing ring can move up and down in the screw fixing device along the threads, and the fixing ring moving upwards does not cause pressure on the screw head, so that the screw can rotate in multiple axes; the downward moving fixing ring presses the screw head, and the lower end of the fixing ring 10 is recessed upwards, and the recessed curved surface is matched with the spherical curved surface of the screw head, so that screws at any angle can be fixed, and the inclination angle of the screws is kept; a second vertical groove is formed in the inner side wall of the fixing ring and also provides torque support for the driving shaft; a vertical connecting piece 12 is fixedly connected in the fixed groove, and the inner side wall of the connecting piece 12 is provided with threads; the connecting element can be connected to the expansion sleeve on the one hand and can be used for accommodating a connecting rod in a subsequent operation step on the other hand, and the connecting rod can be fixed by a subsequent nut by means of a thread in the connecting element.

A through hole which penetrates through the driving shaft in the axial direction is formed in the driving shaft, and the through hole can be used for inserting a guide wire in the operation process; the upper end of the driving shaft 3 extends out of the self-expanding sleeve and is fixedly connected with a transverse handle, and the lower end of the driving shaft is sequentially provided with a first paddle 13 and a second paddle 14 from top to bottom; the blades of the first paddle are inserted into the second vertical groove; the blades of the second paddle are inserted into the first vertical groove; the handle can be used by a doctor, when the doctor rotates the handle, the driving shaft is forced to rotate, and the first paddle on the driving shaft can drive the fixing ring to be screwed down or unscrewed, so that the direction of the screw is fixed; similarly, the second paddle can also drive the screw head to synchronously rotate, so that the screw is placed at the root of the vertebral arch; the length of the blade of the first blade is larger than or equal to that of the blade of the second blade, so that the second blade cannot be stumbled with the second vertical groove when the driving shaft is taken out conveniently.

The expansion sleeve 2 is formed by splicing a first cylinder piece and a second cylinder piece; the sections of the first cylinder piece and the second cylinder piece are semicircular; the first cylinder piece and the second cylinder piece are fixed together through a fixing cap 8, and the fixing cap is sleeved on the outer sides of the first cylinder piece and the second cylinder piece, so that the first cylinder piece and the second cylinder piece cannot be scattered; and the two cylinder sheets can be used as expanders after the fixing caps are removed; the lower ends of the first cylinder piece and the second cylinder piece are fixedly connected with elastic pieces 11; the lower end of the elastic sheet is inserted into the connecting piece 12, the outer diameter of the elastic sheet is larger than the inner diameter of the connecting piece, the elastic sheet has elasticity, so that the first cylinder piece and the second cylinder piece can fix the driving shaft, and the elastic sheet has elasticity when used as an expander, and is convenient for subsequent work.

The utility model discloses a use method:

the utility model is a whole for the operation that pedicle of vertebral arch screws such as percutaneous spinal internal fixation put into to every multiaxis pedicle of vertebral arch screw puts into the equal disposable aseptic package alone of device. After the doctor punches on the centrum, can insert the utility model discloses following the seal wire percutaneous and inserting patient's vertebral arch root, the handle of rotatory drive shaft, can fix the screw of different angles as required when the screw is twisted into the pedicle of vertebral arch, also can rotate the handle earlier before putting into patient's health and fix the angle of screw, put into again, because a paddle has reached tightest state with No. two vertical grooves during putting into, when continuing to rotate the drive shaft, a paddle can drive whole screw fixation device and rotate, thereby can not influence the twist-in of screw; after the screw is placed in the root of the vertebral arch, the driving shaft can be directly taken out without disturbing the placed screw and the expansion sleeve due to the mutual matching of the paddle and the vertical groove; after the driving shaft is taken out, the bone cement injector can be inserted into the screw head along the expansion sleeve and injected according to the requirement; and after the steps are finished, the fixing cap is taken down, the expansion sleeve is unfolded and fixed towards two sides by using the expansion pliers, the connecting rod and other subsequent operation operations can be placed, and finally the first cylinder piece and the second cylinder piece are directly taken out to finish the operation.

The utility model discloses compare the advantage that prior art has and do:

a. the disposable driving shaft is pre-installed on the screw, so that the abrasion problem caused by repeated use of the driving element in the prior art is avoided, the butt joint problem of the driving element and the screw in the prior art is solved, and the butt joint time is shortened;

b. the first paddle of the driving shaft can realize the replacement of a single-shaft screw and a multi-shaft screw at any time; the second paddle is inserted into the screw head, so that the transmission effect is better than that of the prior art, and the torque output cannot be reduced;

c. the use of the expansion device and the disinfection of the driving element in the prior art are replaced, so that the types and the number of instruments are reduced, the preparation process of the operation is simplified, and the misoperation risk is reduced;

d. the operation of installing the driving element and the expansion device on the screw is eliminated, the operation procedure is simplified, the anesthesia time of the patient can be reduced, and the operation risk is reduced.

The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and the technical personnel in the technical field are in the present invention, which can also belong to the protection scope of the present invention.

Claims

1. A polyaxial pedicle screw insertion device, comprising a screw, characterized in that: the screw fixing device (1), the expansion sleeve (2) and the driving shaft (3) are further included; the expansion sleeve (2) is connected with the screw through a screw fixing device, and the axial center parts of the expansion sleeve, the screw fixing device and the screw are provided with accommodating cavities which are communicated up and down; the driving shaft (3) is inserted into the expansion sleeve;

the screw comprises a screw body (4) with threads and a spherical screw head (5); a plurality of outlets (6) communicated with the accommodating cavity are formed in the lower body wall of the screw body; the upper end of the screw head is provided with a screw head groove (7); the screw head groove is communicated with the accommodating cavity, and a first vertical groove is formed in the side wall of the screw head groove;

the upper end of the screw fixing device is provided with a fixing groove, and the lower end of the screw fixing device is provided with an inward-protruding clamping piece (9); the clamping piece clamps the screw head inside the screw fixing device; a fixing ring (10) is arranged inside the screw fixing device; the fixing ring is positioned at the upper end of the screw head and is in threaded connection with the screw fixing device; a second vertical groove is formed in the inner side wall of the fixing ring; a vertical connecting piece (12) is fixedly connected in the fixed groove;

a through hole which penetrates through the driving shaft (3) in the axial direction is formed in the driving shaft; the upper end of the driving shaft extends out of the self-expanding sleeve and is fixedly connected with a transverse handle, and the lower end of the driving shaft is sequentially provided with a first paddle (13) and a second paddle (14) from top to bottom; the blades of the first paddle are inserted into the second vertical groove; the blades of the second paddle are inserted into the first vertical groove.

2. The polyaxial pedicle screw insertion device according to claim 1, wherein: the expansion sleeve (2) is formed by splicing a first cylinder piece and a second cylinder piece; the first horn piece and the second horn piece are fixed together through a fixing cap (8); the lower ends of the first cylinder piece and the second cylinder piece are fixedly connected with elastic pieces (11); the lower end of the elastic sheet is inserted into the connecting piece (12), and the outer diameter of the elastic sheet is larger than the inner diameter of the connecting piece.

3. The polyaxial pedicle screw insertion device according to claim 1, wherein: and the inner side wall of the connecting piece (12) is provided with threads.

4. The polyaxial pedicle screw insertion device according to claim 1, wherein: the length of the blade of the first blade is larger than or equal to that of the blade of the second blade.

5. The polyaxial pedicle screw insertion device according to claim 1, wherein: the lower end of the fixing ring (10) is sunken upwards, and the sunken curved surface is matched with the spherical curved surface of the screw head.