CN211962112U

CN211962112U - Intraspinal lesion unilateral intervertebral disc approach microsurgery retractor

Info

Publication number: CN211962112U
Application number: CN202020071606.5U
Authority: CN
Inventors: 朱永坚; 应广宇; 胡鑫奔; 刘天健
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2020-01-14
Filing date: 2020-01-14
Publication date: 2020-11-20
Anticipated expiration: 2030-01-14

Abstract

The utility model belongs to the technical field of medical instrument appurtenance, a microsurgery retractor of going into way between pathological change unilateral vertebral plate in canalis spinalis is disclosed, is provided with: a first rotor; the inner rail is integrally arranged at the upper edge of the first rotating sheet; the inner rail is provided with meshing inner teeth; the second rotating plate is arranged on the meshing inner teeth of the inner rail in a meshing manner through the meshing outer teeth on the outer rail; the working force arm is movably arranged at the opening of the inner rail through the latch. The spinous process structure of the central line of the back of the spine of a human body is fully utilized as a support, the exposure of a gap between vertebral plates on one side required for the surgical exposure is provided, after the relative positions of the first rotating plate and the second rotating plate are in place, the two cambered surfaces are propped open to form a semi-cylinder, the retraction space in the cavity of the semi-cylinder is provided for the surgical operation, the damage of the surgery to the back structure of the spine is reduced, and the possibility of iatrogenic spinal instability hidden danger caused by the surgery is reduced. Through being provided with the working force arm, provide the handle for rotating, improve rotatory convenience, adopt circular inner rail and outer rail design.

Description

Intraspinal lesion unilateral intervertebral disc approach microsurgery retractor

Technical Field

The utility model belongs to the technical field of medical instrument appurtenance, especially, relate to a pathological single side intervertebral plate approach microsurgery retractor in canalis spinalis.

Background

The intraspinal disease refers to a disease that occurs in the spinal canal of the spine and can cause the involvement of the spinal cord or spinal nerves, thereby causing clinical symptoms, including intraspinal tumors, spinal vascular malformations, and degenerative diseases of the spine such as prolapse of intervertebral disc, etc., and is usually treated by surgery.

Currently, the current state of the art commonly used in the industry is such that: the pathological changes in the vertebral canal are usually performed through a posterior approach operation, and a vertebral plate with a larger range needs to be exposed and cut for removing the focus. With the improvement of the technology, targeted at minimal invasion, a variety of procedures have been developed from total lamina resection, to laminectomy reconstruction, to hemilaminectomy. No matter which type of operation, the posterior structure of the spine is damaged to a certain extent, and the hidden trouble of iatrogenic spinal instability is brought. The unilateral intervertebral disc approach is an operation approach mode which fully utilizes natural gaps of vertebral canal dissection to realize the objective of intra-vertebral disc lesion surgical excision at the cost of minimum vertebral disc bone injury and reduces the influence degree of spinal stability brought by an operation to the minimum on the basis of full development of a minimally invasive technology and following a micro-invasive operation concept.

In summary, the problems of the prior art are as follows: the existing operation type can cause certain damage to the rear structure of the spine, and brings about the hidden trouble of iatrogenic spinal instability.

The difficulty of solving the technical problems is as follows: the posterior structures of the spine associated with the surgical exposure of intraspinal pathologies are mainly spinous and vertebral laminae, which are often sacrificed in conventional procedures in order to be exposed. The design idea of the surgery of access through one side of vertebral plates is to follow the natural bony gap of human anatomy and finish the surgery with minimum trauma, and the goal becomes feasible under the development background of special surgical instruments such as a microscope, the popularization and application of an endoscope, a grinding and drilling milling cutter and the like. The main technical key for designing the retractor is the design of a connector for unfolding and folding between two circular arc single sheets, and the difficulty is to achieve the minimally invasive goal, facilitate the operation and ensure that the structure of the retractor in an unfolded state has enough support stability.

The significance of solving the technical problems is as follows: traditional intervertebral disc intraductal pathological operation retractor is mostly the retractor design of two side pincers forms or for monolithic form drag hook design, and this design is the 1/4 cylinder body cavity structure under the state of drawing in to the half cylinder body cavity structure under the expansion operating condition, and the benefit is no matter expand with drawing in, all is very light and handy, and the simple operation moreover, contrast tradition retractor mode belongs to the breakthrough in the design theory. By applying the retractor, a minimally invasive surgery access can be provided by fully utilizing natural anatomical gaps, and the surgery can be completed with minimum trauma cost.

SUMMERY OF THE UTILITY MODEL

To the problem that prior art exists, the utility model provides a microsurgery retractor of getting into way between pathological unilateral vertebral plate in the canalis spinalis can reduce the iatrogenic nature damage that the operation leads to minimum.

The utility model discloses a realize like this, this intraspinal pathologic change unilateral intervertebral plate approach microsurgery retractor is provided with:

a first rotor;

the inner rail is integrally arranged at the upper edge of the first rotating sheet; the inner rail is provided with meshing inner teeth;

the second rotating plate is arranged on the meshing inner teeth of the inner rail in a meshing manner through the meshing outer teeth on the outer rail;

the working force arm is movably arranged at the opening of the inner rail through the latch.

The spinous process structure of the central line of the back of the spine of a human body is fully utilized as a support, the exposure of a gap between vertebral plates on one side required for the surgical exposure is provided, after the relative positions of the first rotating plate and the second rotating plate are in place, the two cambered surfaces are propped open to form a semi-cylinder, the retraction space in the cavity of the semi-cylinder is provided for the surgical operation, the damage of the surgery to the back structure of the spine is reduced, and the possibility of iatrogenic spinal instability hidden danger caused by the surgery is reduced. Through being provided with the work arm of force, improve the handle for rotating, improve rotatory convenience. The circular inner rail and the circular outer rail are designed, the unfolding and folding are completed through the existing circular rail, the occupied space is small, and the operation is very convenient.

Further, a first arc-shaped surface is integrally installed at the lower end of the first rotating sheet, and a second arc-shaped surface is integrally installed at the lower end of the second rotating sheet.

Furthermore, the tail end of the working force arm is provided with a clamping groove matched with the clamping teeth.

The inner rail and the outer rail are provided with clamping teeth and clamping grooves which are matched with each other, so that the opening states with different degrees can be formed.

Further, the first arc-shaped surface and the second arc-shaped surface are 1/4 of cylinder surfaces.

When the retractor is folded, the size of the cambered surface is only 90 degrees, the cambered surface is exposed on one side, muscle peeling on the opposite side of the spinous process is not needed, and compared with the traditional retractor, the retractor can reduce at least half of trauma and minimize skin incision contraction.

Drawings

Fig. 1 is a schematic structural diagram of a first arc-shaped surface provided in an embodiment of the present invention;

fig. 2 is a schematic structural view of a second arc-shaped surface provided by the embodiment of the present invention;

fig. 3 is a schematic structural view of an intraspinal lesion unilateral intervertebral plate approach microsurgical retractor provided by an embodiment of the invention;

FIG. 4 is a schematic view of a state structure of the present invention when a first rotor is nested in a second rotor;

in the figure: 1. a working arm of force; 2. an inner rail; 3. a first arc-shaped surface; 4. clamping teeth; 5. meshing the internal teeth; 6. an outer rail; 7. meshing the external teeth; 8. a second arcuate surface; 9. a first rotor; 10. and a second rotor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The structure of the present invention will be described in detail with reference to fig. 1 to 4.

Example (b):

the first rotating sheet 9 is provided with a first arc-shaped surface 3 and an inner rail 2; the inner rail 2 is bent in half to form a working force arm 1; the inner rail 2 is provided with meshing inner teeth 5;

the second rotating sheet 10 is provided with an outer rail 6 and a second arc-shaped surface 8; the outer rail 6 is provided with meshing outer teeth 7;

the first rotating plate 9 is sleeved inside the second rotating plate 10 and is meshed and fixed with the meshing external teeth 7 on the outer rail 6 through the meshing internal teeth 5 on the inner rail 2.

The utility model discloses a theory of operation:

the first rotating sheet 9 is sleeved into the second rotating sheet 10, and when the first rotating sheet 9 rotates around the second rotating sheet 10, the inner rail 2 on the first rotating sheet 9 is bent into a working force arm 1; the working force arm 1 is grasped by hands, the first rotating plate 9 rotates around the second rotating plate 10, and when the meshing internal teeth 5 on the inner rail 2 are completely meshed with the meshing external teeth 7 on the outer rail 6, the working force arm 1 is turned flat; wherein, can anticlockwise rotate (the biggest 90 degrees) between inner rail 2 and the outer rail 6, two cambered surfaces strut and form the semicircle post after putting in place, draw the space for the operation provides the semicircle intracavity, reduce the operation and to the rear portion structure of backbone cause the destruction to reduce the possibility that the operation brought the unstable hidden danger of iatrogenic backbone.

The first arc-shaped face 3 and the second arc-shaped face 8 adopt 1/4 cylinder faces, the first arc-shaped face 3 and the second arc-shaped face 8 of the two 1/4 cylinder faces are unfolded and folded, the sheet-shaped face (folded state) and the semi-cylinder (working unfolded state) can be conveniently switched, the sheet-shaped face in the folded state is inserted into a gap beside the spinous process at the operation target position, and the sheet-shaped face can be unfolded under a small skin incision to form a semi-cylinder body cavity exposure space which can reach the surface of the vertebral plate from the back and takes the central spinous process as a natural barrier and the vertebral plate gap at one side as the center.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.

Claims

1. The intraspinal pathological unilateral intervertebral approach microsurgery retractor is characterized in that the intraspinal pathological unilateral intervertebral approach microsurgery retractor is provided with:

a first rotor;

2. The intralertebral diseased unilateral intervertebral disc approach microsurgical retractor of claim 1, wherein a first arc-shaped surface is integrally mounted at a lower end of the first rotating plate, and a second arc-shaped surface is integrally mounted at a lower end of the second rotating plate.

3. The intravertebral pathological unilateral intervertebral access microsurgical retractor of claim 1, wherein the end of the working arm is provided with a slot matched with the latch.

4. The intralertebral diseased unilateral vertebral plate approach microsurgical retractor of claim 2, wherein the first and second arcuate surfaces adopt a 1/4 cylinder cavity configuration and form a semi-cylinder cavity configuration upon deployment.