CN113440241A - Screw implantation auxiliary sleeve for minimally invasive spine surgery - Google Patents
Screw implantation auxiliary sleeve for minimally invasive spine surgery Download PDFInfo
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- CN113440241A CN113440241A CN202110690981.7A CN202110690981A CN113440241A CN 113440241 A CN113440241 A CN 113440241A CN 202110690981 A CN202110690981 A CN 202110690981A CN 113440241 A CN113440241 A CN 113440241A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/92—Impactors or extractors, e.g. for removing intramedullary devices
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Abstract
The invention relates to a screw implantation auxiliary sleeve for minimally invasive spine surgery, belongs to the technical field of spine implantation screw implantation, and solves the problem that safety and simplicity cannot be considered in the conventional spine implantation screw implantation equipment. A screw implantation assistance sleeve for minimally invasive spine surgery includes: the sleeve comprises a sleeve body, a first groove, a second groove and a screw connecting part; the screw connecting part is arranged at the end part of the sleeve main body; the first groove is a through groove arranged on the middle shaft surface of the screw connecting part and divides the end of the screw connecting part into 2 screw connecting cantilevers parallel to the axis of the sleeve main body; the second groove is a blind groove, the middle axial surfaces of the first groove and the second groove are overlapped, and the widths of the first groove and the second groove are equal; the screw connecting cantilever is connected with a nut of the implanted screw. The invention avoids changing the screw structure through the arrangement of the sleeve, and simultaneously ensures the safety and the simplicity of the operation.
Description
Technical Field
The invention relates to the technical field of spinal implant screw implantation, in particular to a screw implantation auxiliary sleeve for spinal minimally invasive surgery.
Background
Minimally invasive surgery is a trend in surgical development. Compared with the conventional open surgery, the spine minimally invasive surgery has the advantages of small tissue trauma, small bleeding, quick postoperative recovery, low cost and the like, and is more easily accepted by patients. Spinal surgery typically employs nail and rod implants to immobilize a diseased segment of the spine. When the minimally invasive spine surgery is performed, the skin opening is small, implantation of the implant screw cannot be performed by a conventional method, and auxiliary instruments are required to be matched for operation.
Aiming at the problem of implanting the implant screw in the minimally invasive spine surgery, methods adopted by various families in the market can be divided into two types, the first type is to change the structure of the implant screw, namely, on the premise of keeping an effective structure for fixing the implant screw, a structure is additionally added to assist the implant screw to be implanted, the typical mode is to increase the length of a screw cap at the tail part of the implant screw, and the redundant length is broken off after the implant screw is implanted, as in the patent CN 201721055619.8; the second type is to keep the effective structure of the internal fixation of the implant screw unchanged, and to use a special surgical instrument to assist the implantation of the implant screw, typically by designing an auxiliary sleeve to cooperate with the implant screw as an external extension of the implant screw, so as to facilitate the subsequent operation of the implant screw outside the skin, as in the patent CN 201710153277.1. Compared with the two methods, although the first method for changing the structure of the implanted screw can simplify the operation steps of the individual surgery, the redundant structure of the implanted screw needs to be broken, the fracture is rough, and the tissue of the patient can be stimulated strongly. The second mode overcomes the defects of the first mode on the whole, but various auxiliary instruments on the market still have many defects: for example, although the nailing device adopted in patent CN201711203278.9 has a simple structure, its strength is not enough to withstand the subsequent expanding and pressurizing operation, and additional instruments are required; for example, the auxiliary device adopted in patent CN201710153277.1 is strong enough, but the reserved rod penetrating window is too small, so that precise rod penetrating needs to be performed subcutaneously for a long distance, and additional wound is caused to the patient.
Disclosure of Invention
In view of the above analysis, the present invention aims to provide a screw implantation auxiliary sleeve for minimally invasive spine surgery, which is used to solve the problem that the existing spinal screw implantation equipment cannot be compatible with safety and simplicity.
The purpose of the invention is mainly realized by the following technical scheme:
in one set of technical solution of the present invention, a screw implantation auxiliary sleeve for minimally invasive spine surgery includes: the sleeve comprises a sleeve body, a first groove, a second groove and a screw connecting part;
the screw connecting part is arranged at the end part of the sleeve main body; the first groove is a through groove arranged on the middle shaft surface of the screw connecting part and divides the end of the screw connecting part into 2 screw connecting cantilevers parallel to the axis of the sleeve main body; the second groove is a blind groove, the middle axial surfaces of the first groove and the second groove are overlapped, and the widths of the first groove and the second groove are equal; the screw connecting cantilever is connected with a nut of the implanted screw.
In one set of technical scheme of the invention, the first groove defines a first side end opening surface and a second side end opening surface which are parallel to the axis of the sleeve main body; the second groove is equipped with 2, sets up respectively at first side end opening face and second side end opening face, and the bottom in 2 second grooves is separated through the sleeve main part.
In one set of technical scheme of the invention, the screw connecting cantilever is connected with a nut of the implanted screw through clamping; the nut of the implant screw is inserted between the 2 screw connection cantilevers.
In one set of technical scheme of the invention, the clamping structure comprises a clamping part and a clamping groove part which are mutually clamped;
the buckling part is a convex structure arranged on the inner side surface of the screw connecting cantilever, and the clamping groove part is a concave structure arranged on the outer side surface of a screw cap of the implanted screw;
or the buckling part is a concave structure arranged on the inner side surface of the screw connecting cantilever, and the clamping groove part is a convex structure arranged on the outer side surface of a screw cap of the implanted screw.
In one set of technical scheme of the invention, the inner side surface of the screw connection cantilever is provided with a guide structure.
In one set of technical scheme of the invention, one end of the sleeve main body, which is far away from the screw connecting part, is provided with a threaded connecting part.
In one set of technical scheme of the invention, the sleeve main body is provided with an unlocking structure;
when the unlocking structure releases the limitation on the 2 screw connection cantilevers, the cantilever ends of the 2 screw connection cantilevers are bent towards the radial direction far away from the axis of the sleeve body.
In one set of technical scheme of the invention, the unlocking structure is a hole which is connected with the cantilever through a screw and is arranged along the radial direction of the sleeve main body.
In one set of technical scheme of the invention, the joint of the fixed end of the screw connecting cantilever and the sleeve main body is made of elastic material;
or the fixed end of the screw connecting cantilever is hinged with the sleeve main body.
In one set of technical scheme of the invention, a sleeve main body is provided with a first guide surface and a second guide surface; the first guide surface is superposed with the first side end opening surface, and the second guide surface is superposed with the second side end opening surface;
the first guide surface and the second guide surface are both cutting surfaces.
The technical scheme of the invention can at least realize one of the following effects:
1. according to the invention, through the arrangement of the first groove and the second groove, the implantation rod can be smoothly implanted and is connected with the nut of the implantation screw, so that the complexity of the whole equipment is simplified, and the use is convenient;
2. the screw connecting cantilever is connected with the nut of the implant screw through the screw, and the sleeve main body and the implant screw rotate as a whole, so that the drive equipment drives the implant screw to be screwed into a vertebral column;
3. according to the invention, the bolt connecting cantilever is radially rotated or bent relative to the sleeve main body, so that the bolt connecting cantilever is separated from the implanted bolt and nut, the disassembly is convenient, the violent operation in a patient body is not required, and the secondary injury to the patient is avoided.
In the invention, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
FIG. 1 is a front view of an embodiment of the present invention;
FIG. 2 is a side view of an embodiment of the present invention;
FIG. 3 is a schematic view of the present invention in combination with an implant screw;
FIG. 4 is a schematic view of S1 during use of an embodiment of the present invention;
FIG. 5 is a schematic view of S2 during use of an embodiment of the present invention;
FIG. 6 is a schematic view of S3 during use of an embodiment of the present invention;
reference numerals:
1-a first groove; 2-a second groove; 3-a first guide surface; 4-an unlocking structure; 5-a threaded connection; 6-round hole; 7-connecting the cantilever by a screw; 8-a screw cap; 9-implanting a rod; 10-rod placing device.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the term "connected" should be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection, which may be a mechanical connection, an electrical connection, which may be a direct connection, or an indirect connection via an intermediate medium. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The terms "top," "bottom," "above … …," "below," and "on … …" as used throughout the description are relative positions with respect to components of the device, such as the relative positions of the top and bottom substrates inside the device. It will be appreciated that the devices are multifunctional, regardless of their orientation in space.
As shown in fig. 1, 2 and 3, an embodiment of the present invention provides a screw implantation auxiliary sleeve for minimally invasive spine surgery, wherein when a spine implantation screw is implanted, an implantation screw is screwed into a spine, 2 implantation screws are connected to a position where an implantation rod is implanted into the spine, when the number of implantation screws is large, the number of implantation rods is 1 less than that of implantation screws, and each implantation rod is connected to 2 implantation screws. The screw implantation auxiliary sleeve for minimally invasive spine surgery of the embodiment of the invention is used for screwing the implantation screw into the spine and keeping the posture and the position of the implantation screw before the implantation rod is implanted in place.
Specifically, the screw implantation auxiliary sleeve for minimally invasive spine surgery comprises: the sleeve comprises a sleeve body, a first groove 1, a second groove 2 and a screw connecting part; the screw connecting part is arranged at the end part of the sleeve main body; the first groove 1 is a through groove arranged on the middle shaft surface of the screw connection part and divides the end part of the screw connection part into 2 screw connection cantilevers 7 parallel to the axis of the sleeve main body; the second groove 2 is a blind groove, the middle axial surfaces of the first groove 1 and the second groove 2 are overlapped, and the widths of the first groove 1 and the second groove 2 are equal; the screw connection cantilever 7 is connected with a nut 8 of the implanted screw. It should be noted that, the nut 8 of the implantation screw is provided with an implantation rod installation groove with the same width as the first groove 1, the first groove 1 and the second groove 2 form an arched door-shaped opening, the width of the opening is determined according to the specification of the implantation rod, the area provides sufficient rod penetrating operation space and subcutaneous vision, which is convenient for doctors to perform flexible rod penetrating operation, meanwhile, the opening with enough length can accommodate the main body of the rod placing device 10 into the sleeve, the length of the implantation rod reserved outside is reduced, and the incisal mark is reduced. When implanting screw and screw connecting portion fixed connection, implant excellent mounting groove and first groove 1 and align, the screw implantation auxiliary sleeve that will be used for backbone minimal access surgery is connected with the equipment that other screws implantation in-process cooperateed and use, can carry out subsequent operations such as pressure stick. When the implantation rod is installed, one end of the implantation rod is firstly inserted into the second groove 2, the first groove 1 and the second groove 2 are overlapped and have equal width, the tip end of the implantation rod slides into and penetrates through the first groove 1 under the guiding effect of the second groove 2, after the implantation rod completes the connection of the adjacent 2 implantation screws, the subsequent screw implantation operation is carried out until the whole screw implantation operation is completed, the connection limit between each implantation screw and the corresponding screw implantation auxiliary sleeve for the minimally invasive spine operation is released, the screw implantation auxiliary sleeve for the minimally invasive spine operation is taken down, and the implantation screw and the implantation rod 9 are kept in a patient body for carrying out the processes of technical traction and the like.
For convenience of explanation, in the embodiment of the present invention, the first grooves 1 define a first side end opening face and a second side end opening face parallel to the axis of the sleeve body, 2 second grooves 2 are provided, respectively provided at the first side end opening face and the second side end opening face, and the bottoms of the 2 second grooves 2 are separated by the sleeve body. The first groove 1 and the second groove 2 are partially overlapped and form an integral long groove, but the first groove 1 is a through groove, the opening of the through groove is U-shaped at the edge junction of the sleeve main body, and a first side end opening surface and a second side end opening surface are limited; the second slot 2 is a bidirectional blind slot. The second groove 2 can guide the tip of the implant rod when the implant rod is implanted into a patient, so that the implant rod can be finally inserted into the nuts 8 of 2 corresponding implant screws, and the installation and connection between the implant rod and the implant screws are facilitated.
After the implantation screw is screwed into the vertebra, in order to facilitate the detachment between the screw implantation auxiliary sleeve for minimally invasive spine surgery and the nut 8 of the implantation screw, in the embodiment of the invention, the screw connection cantilever 7 is connected with the nut 8 of the implantation screw through clamping; the nut 8 of the implant screw is inserted between the 2 screw connection cantilevers 7. The embodiment of the invention enables the implanted screw and the screw connecting cantilever 7 to be relatively fixed through the clamping structure of the screw cap 8 of the implanted screw and the screw connecting cantilever 7.
Exemplarily, in the embodiment of the present invention, the clamping structure includes a clamping portion and a clamping portion that are clamped with each other; the buckling part is a convex structure arranged on the inner side surface of the screw connecting cantilever 7, and the clamping groove part is a concave structure arranged on the outer side surface of a screw cap 8 implanted with a screw; or the buckling part is a concave structure arranged on the inner side surface of the screw connecting cantilever 7, and the clamping groove part is a convex structure arranged on the outer side surface of a screw cap 8 for implanting the screw. The structure of the buckle and the clamping groove can simplify the complexity of the screw connection cantilever 7 to the maximum extent, and meanwhile, the medical staff can use the embodiment of the invention conveniently. In the embodiment of the invention, one of the clamping part and the clamping groove part is arranged on the screw connecting cantilever 7, and the other one is arranged on a nut 8 implanted with a screw. In addition, when the screw connecting cantilever 7 is bent or bent towards the radial direction far away from the axis of the sleeve main body under the action of external force, the buckling part is separated from the clamping groove part, and the implanted screw is in contact with the screw connecting part for limiting.
In order to allow the smooth implantation of the screw into the vertebra of the patient, in an embodiment of the invention the inner side of the screw attachment cantilever 7 is provided with a guiding structure which defines the freedom between the implanted screw and the screw attachment portion.
The utility model discloses a screw connection portion, including 6 degrees of freedom, relative with the axis of sleeve main part, axial clockwise and anticlockwise rotates, axial and radial removal, the spacing shell fragment on screw connection portion contains two arch-shaped annular and takes the direction inclined plane, two arch-shaped annular sizes are confirmed by the specification of implanting the screw head, and the boss size of shell fragment is confirmed by the spacing hole size of implanting the screw head, through guide structure's setting, cooperation joint structure, can inject the degree of freedom between implanting screw and the screw connection portion. The screw connecting cantilever 7 and the implanted screw form limit through the arrangement of the guide structure, so that the screw implantation auxiliary sleeve for minimally invasive spine surgery and the implanted screw form a whole, and when the implanted screw is screwed into the vertebra, the implanted screw can be screwed into the vertebra only by directly or indirectly driving the whole by using a driving device.
In order to further improve the connection performance between the screw implantation auxiliary sleeve for minimally invasive spine surgery and other instruments used in a matched manner in the screw implantation process, in the embodiment of the invention, the threaded connection part 5 is provided with a tail multi-thread trapezoidal thread, the specific parameters of the thread are determined by an adaptive structure at the output end of the driving device, the thread form can also convert radial torsional force into axial tensile force, the multi-thread structure of the thread can greatly reduce the number of rotation turns required by moving the same distance, and the operation time is saved.
When the embodiment of the invention is used, the nut 8 of the implanted screw is separated from the 2 screw connecting cantilevers 7 by bending or rotating the screw connecting cantilevers 7 outwards to realize the separation of the implanted screw from the screw connecting cantilevers 7, in order to prevent the implanted screw from being separated from the screw connecting cantilevers 7 by mistake caused by mistake operation, when the embodiment of the invention is used, the screw implantation auxiliary sleeve for minimally invasive spine surgery is also provided with an unlocking structure 4, the limit of the bending or rotation of the screw connecting cantilever 7 is realized through the limit action formed by the unlocking device and the unlocking structure 4, correspondingly, as long as the limit action between the unlocking device and the unlocking structure 4 is released, can realize the unblock of bolted connection cantilever 7 to prevent that the maloperation from appearing and causing the separation of mistake of implanting screw and bolted connection cantilever 7, avoid the apparatus to damage and lead to the fact the injury to the patient. Specifically, the sleeve body is provided with an unlocking structure 4; when the unlocking structure 4 releases the limitation of the 2 screw connection cantilevers 7, the cantilever ends of the 2 screw connection cantilevers 7 are bent in the radial direction away from the sleeve body axis. Exemplarily, the unlocking structure 4 is 2 round holes 6 with the same specification radially arranged along the sleeve main body, and the cylindrical protrusion on the unlocking structure 4 can be inserted into the round holes 6, so that the spacing release between the unlocking device and the unlocking structure 4 is realized.
Considering that the embodiment of the present invention realizes the separation of the implant screw from the screw connection cantilever 7 by the outward bending or rotation of the screw connection cantilever 7, in the embodiment of the present invention, the connection between the fixed end of the screw connection cantilever 7 and the sleeve body is made of an elastic material; or, the fixed end of the screw connecting cantilever 7 is hinged with the sleeve main body.
When the screw implantation auxiliary sleeve for minimally invasive spine surgery is actually used for implanting spinal screws, 2 implantation screws generally correspond to 1 implantation rod, a nut 8 of the implantation screw is provided with an implantation rod installation groove, and in order to enable the implantation rod to be smoothly connected with 2 implantation screws, the installation grooves of the 2 implantation screws need to be ensured to be collinear, in the embodiment of the invention, a sleeve main body is provided with a first guide surface 3 and a second guide surface; the first guide surface 3 coincides with the first side end opening surface and the second guide surface coincides with the second side end opening surface. Besides the judgment of the rotation angle of the implanted screw, the screw implantation auxiliary sleeve can be used as the connection guide of the screw implantation auxiliary sleeve used for the minimally invasive spine surgery and other matched equipment, so that the subcutaneous positioning time is saved. The first guide surface 3 and the second guide surface are both machined surface planes on the side surfaces of the columnar sleeve main body.
In one possible embodiment of the present invention, the screw connection part 5 of the screw implantation assisting sleeve for minimally invasive spine surgery according to the embodiment of the present invention is connected by a driving device for screwing a screw into a vertebra, and the screw is driven into the vertebra by the screw connection part 5. When the screw implantation auxiliary sleeve for minimally invasive spine surgery is used, the screw implantation auxiliary sleeve for minimally invasive spine surgery is used for connecting the driving device with the implanted screw and screwing the implanted screw into the vertebra, so that the driving device needs to have good connection characteristics and transmission characteristics with the screw implantation auxiliary sleeve for minimally invasive spine surgery. It should be noted that the driving device includes, but is not limited to: the medical hand drill, the rotary handle or the screwdriver handle, the driving device is manual or electric, and the driving device is provided with an output end with threads.
Referring to fig. 4, 5 and 6, the use of the embodiment of the present invention will be described with reference to the structure of the embodiment of the present invention, taking 2 implantation screws and 1 implantation rod as examples:
s1, 2 screw implantation auxiliary sleeves for minimally invasive spine surgery of the embodiment of the invention are needed, 1 implantation screw is inserted between 2 screw connection cantilevers 7 of 1 screw implantation auxiliary sleeve for minimally invasive spine surgery, the implantation screw and the screw connection cantilevers 7 are firmly clamped and connected, and the other 1 implantation screw and the screw implantation auxiliary sleeve for minimally invasive spine surgery are connected in the same way. The implant rod is also connected to the rod inserter 10.
S2, driving one of the screw implantation auxiliary sleeves for minimally invasive spine surgery to drive the implantation screw connected with the screw implantation auxiliary sleeve to be screwed into the vertebra through the driving device, and completing the implantation process of the implantation screw. The other implant screw also adopts a communicated implantation mode and ensures that the implant rod installation grooves on the screw caps 8 of the 2 implant screws are collinear.
S3, inserting the tip of an implantation rod into a second groove 2 of one screw implantation auxiliary sleeve for the minimally invasive spine surgery, sliding the implantation rod into a first groove 1 along the second groove 2, enabling the implantation rod to penetrate through the first groove 1, further inserting the implantation rod because the implantation rod installation grooves of 2 implantation screws are collinear at the moment, enabling the implantation rod to penetrate through the first grooves 1 of the 2 screw implantation auxiliary sleeves for the minimally invasive spine surgery, pushing the implantation rod installation grooves of the screws towards the screw direction, enabling the main body of the rod placing device 10 to be located in the second groove 2 of the screw implantation auxiliary sleeve for the minimally invasive spine surgery which penetrates first, and further completing subsequent connection.
In summary, the embodiment of the invention provides a screw implantation auxiliary sleeve for minimally invasive spine surgery, and the invention enables an implantation rod to be implanted smoothly through the arrangement of a first groove 1 and a second groove 2, and is connected with a nut 8 for implanting screws, thereby simplifying the complexity of the whole device and facilitating the use; the screw connecting cantilever is connected with the nut of the implant screw through the screw, and the sleeve main body and the implant screw rotate as a whole, so that the drive equipment drives the implant screw to be screwed into a vertebral column; according to the invention, the bolt connecting cantilever 7 is radially rotated or bent relative to the sleeve main body, so that the bolt connecting cantilever 7 is separated from the implanted bolt and nut, the disassembly is convenient, the violent operation in a patient body is not required, and the secondary injury to the patient is avoided.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. A screw implantation aid sleeve for minimally invasive spine surgery, comprising: the sleeve comprises a sleeve body, a first groove (1), a second groove (2) and a screw connecting part;
the screw connecting part is arranged at the end part of the sleeve main body; the first groove (1) is a through groove arranged on the middle shaft surface of the screw connecting part and divides the end part of the screw connecting part into 2 screw connecting cantilevers (7) parallel to the axis of the sleeve main body; the second groove (2) is a blind groove, the middle axial surfaces of the first groove (1) and the second groove (2) are overlapped, and the widths of the first groove (1) and the second groove (2) are equal; the screw connecting cantilever (7) is connected with a nut (8) of the implanted screw.
2. Screw implantation aid sleeve for minimally invasive spine surgery according to claim 1, characterized in that the first slot (1) defines a first and a second side end opening face parallel to the sleeve body axis; the number of the second grooves (2) is 2, the second grooves are respectively arranged on the first side end opening face and the second side end opening face, and the bottoms of the 2 second grooves (2) are separated through the sleeve body.
3. Screw implantation aid sleeve for minimally invasive spine surgery according to claim 2, characterized in that the screw connection cantilever (7) is linked with a nut (8) of the implantation screw by snapping; the nut (8) of the implantation screw is inserted between the 2 screw connection cantilevers (7).
4. The screw implantation auxiliary sleeve for minimally invasive spine surgery according to claim 3, wherein the clamping structure comprises a clamping portion and a clamping groove portion which are clamped with each other;
the buckling part is a convex structure arranged on the inner side surface of the screw connecting cantilever (7), and the clamping groove part is a concave structure arranged on the outer side surface of a screw cap (8) for implanting a screw;
or the buckling part is a concave structure arranged on the inner side surface of the screw connecting cantilever (7), and the clamping groove part is a convex structure arranged on the outer side surface of a screw cap (8) for implanting a screw.
5. Screw implantation aid sleeve for minimally invasive spine surgery according to claim 3 or 4, characterized in that the inner side of the screw connection cantilever (7) is provided with a guiding structure.
6. Screw implantation aid sleeve for minimally invasive spine surgery according to claim 5, characterized in that the end of the sleeve body remote from the screw connection is provided with a threaded connection (5).
7. Screw implantation aid sleeve for minimally invasive spine surgery according to claim 6, characterized in that the sleeve body is provided with an unlocking structure (4);
when the unlocking structure (4) releases the limitation on the 2 screw connection cantilevers (7), the cantilever ends of the 2 screw connection cantilevers (7) are bent towards the radial direction far away from the axis of the sleeve body.
8. Screw implantation aid sleeve for minimally invasive spine surgery according to claim 7, characterized in that the unlocking structure (4) is a hole in the screw connection cantilever (7) arranged in the radial direction of the sleeve body.
9. The screw implantation auxiliary sleeve for minimally invasive spine surgery as recited in claim 7 or 8, characterized in that the joint of the fixed end of the screw connection cantilever (7) and the sleeve body is made of elastic material;
or the fixed end of the screw connecting cantilever (7) is hinged with the sleeve main body.
10. Screw implantation aid sleeve for minimally invasive spine surgery according to claim 7 or 8, characterized in that the sleeve body is provided with a first guide surface (3) and a second guide surface; the first guide surface (3) is superposed with the first side end opening surface, and the second guide surface is superposed with the second side end opening surface;
the first guide surface (3) and the second guide surface are both cutting surfaces.
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| CN202110690981.7A CN113440241B (en) | 2021-06-22 | 2021-06-22 | Screw implantation auxiliary sleeve for minimally invasive spine surgery |
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| CN202110690981.7A CN113440241B (en) | 2021-06-22 | 2021-06-22 | Screw implantation auxiliary sleeve for minimally invasive spine surgery |
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| CN113440241B CN113440241B (en) | 2023-07-25 |
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