Minimally invasive spine retractor

Abstract

The utility model provides a minimally invasive spine retractor, which belongs to the technical field of medical instruments and comprises a retraction mechanism, the retraction mechanism comprises a base, a middle-layer ring body and an upper-layer ring body, the middle-layer ring body is positioned between the base and the upper-layer ring body, and three limiting openings are formed in the middle-layer ring body at equal intervals in a surrounding manner. A plurality of limiting openings are formed in the middle layer ring body, each limiting opening is movably connected with a distraction frame, a notch is formed in the edge of one side of the middle layer ring body, an elastic piece is arranged in the notch, a positioning block is arranged on the elastic piece, positioning holes are connected to the positioning block in a clamped mode, and the positioning holes are formed in the lower side of the upper layer ring body and distributed at equal intervals. The instrument can be introduced into the body, a channel reaching the focus is rapidly established, meanwhile, the degree of tissue opening is automatically positioned, operation can be conducted with one hand, convenience and rapidness are achieved, the safety and reliability of channel establishment are improved, the structure is simple and stable, and certain practical value is achieved.

Description

Technical Field

[0001] This utility model mainly relates to the technical field of medical devices, specifically a minimally invasive spinal retractor. Background Technology

[0002] Medical devices refer to instruments, equipment, appliances, in vitro diagnostic reagents and calibrators, materials and other similar or related items that are used directly or indirectly on the human body. Their efficacy is mainly obtained through physical means, and their purpose is to diagnose, prevent, monitor, treat or alleviate diseases, diagnose, monitor, treat, alleviate or compensate for injuries, examine, replace, regulate or support physiological structures or physiological processes, and provide information for medical or diagnostic purposes by examining samples from the human body.

[0003] A spinal retractor is a medical device used in minimally invasive spinal surgery. It is mainly used in thoracic and lumbar spine surgery to help surgeons manipulate and treat intervertebral discs during surgery. In minimally invasive spinal surgery, a small incision is needed to introduce the device into the body and establish a channel to the lesion before surgery can begin. Most current retractors have a "clamp-like" structure, which cannot automatically position the degree of retraction during use. Medical personnel need to lock it after traction is opened, which is not convenient and quick to operate and cannot be done with one hand. Utility Model Content

[0004] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing solutions are too simplistic. Specifically, this utility model provides a minimally invasive spinal retractor to solve the problem mentioned in the background that most current retractors have a "clamp-like" structure, which cannot automatically and promptly determine the degree of retraction during use, requiring medical personnel to lock it after traction, thus posing a technical problem that is not conducive to operation.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A minimally invasive spinal retractor includes a retraction mechanism comprising a base, a middle ring, and an upper ring. The middle ring is located between the base and the upper ring. Three limiting openings are evenly spaced around the middle ring, and each limiting opening is movably connected to a support frame. A notch is provided on one edge of the middle ring, and a spring piece is provided within the notch. A positioning block is provided on the spring piece, and the positioning block engages with a positioning hole. The positioning holes are located on the lower side of the upper ring and are evenly distributed.

[0007] Furthermore, the support frame includes a guide post, a connecting part, and a support plate, and the connecting part and the lower end of the guide post are detachably connected.

[0008] Furthermore, the three spreading pieces form a channel in the cylindrical structure.

[0009] Furthermore, the base and the upper ring are connected by threads.

[0010] Furthermore, the upper ring body is provided with three arc-shaped openings at equal intervals, and each arc-shaped opening is movably connected to the upper end of the corresponding guide post.

[0011] Furthermore, a handle is bolted to one side of the lower surface of the middle ring.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention, through its base, middle ring, upper ring, expansion frame, and handle, enables the introduction of instruments into the body during minimally invasive spinal surgery, quickly establishing a channel to the lesion. The interplay between the positioning hole, spring, and positioning block automatically positions the expansion angle during tissue expansion, allowing for single-handed operation. This is extremely convenient and quick, improving the safety and reliability of channel establishment. Furthermore, its simple and stable structure has practical value.

[0014] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is an exploded view of the traction mechanism of this utility model;

[0017] Figure 3 This is a schematic diagram of the upper ring structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the support frame structure of this utility model;

[0019] Figure 5 For the present utility model Figure 2 A magnified structural diagram of area A in the middle.

[0020] In the diagram: 1. Pulling mechanism; 11. Base; 12. Middle ring; 121. Limiting opening; 122. Notch; 13. Upper ring; 131. Arc-shaped opening; 132. Positioning hole; 14. Spreading frame; 141. Guide post; 142. Connecting part; 143. Spreading piece; 15. Spring piece; 151. Positioning block; 2. Handle. Detailed Implementation

[0021] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] Please refer to the appendix carefully. Figure 1-5 A minimally invasive spinal retractor includes a retraction mechanism 1, which comprises a base 11, a middle ring 12, and an upper ring 13. The middle ring 12 is located between the base 11 and the upper ring 13. Three limiting openings 121 are equally spaced around the middle ring 12, and each limiting opening 121 is movably connected to a support frame 14. A notch 122 is provided on one side edge of the middle ring 12, and a spring piece 15 is provided in the notch 122. A positioning block 151 is provided on the spring piece 15, and the positioning block 151 is engaged with a positioning hole 132. The positioning holes 132 are located on the lower side of the upper ring 13, and the positioning holes 132 are evenly distributed.

[0025] The above structure enables the introduction of instruments into the body during minimally invasive spinal surgery, quickly establishing a channel to the lesion. It also automatically positions the degree of tissue distension, allowing for one-handed operation, which is very convenient and fast. This improves the safety and reliability of channel establishment, and the structure is simple, stable, and has certain practical value.

[0026] The specific operation is as follows: During minimally invasive spinal surgery, a small incision is first made. The right hand holds the handle 2, and the expansion piece 143 is then introduced into the body through the small incision. The upper ring 13 is rotated with the thumb. The arc-shaped opening 131 on the upper ring 13 drives the guide column 141 to move. Under the constraint of the limiting opening 121, the expansion frame 14 moves along the radius of the upper ring 13 to adjust the degree of expansion. Then, the spring piece 15 at the index finger is released, and the spring piece 15 returns to its original position. The positioning block 151 is then inserted into the positioning hole 132 to establish a channel to the lesion.

[0027] Please refer to the appendix carefully. Figure 1 and attached Figure 2 The base 11 and the upper ring 13 are connected by threads, which facilitates the assembly and disassembly of the base 11, the upper ring 13 and the middle ring 12. The upper ring 13 has three arc-shaped openings 131 arranged at equal intervals around it. Each arc-shaped opening 131 is movably connected to the upper end of the corresponding guide post 141. Through the arc-shaped openings 131, the guide post 141 is driven to move along the direction of the limiting opening 121. A handle 2 is bolted to one side of the lower surface of the middle ring 12, which makes it convenient for medical personnel to pick it up with one hand.

[0028] Please refer to the appendix carefully. Figure 2 and attached Figure 4 The support frame 14 includes a guide post 141, a connecting part 142, and a support piece 143. The connecting part 142 and the lower end of the guide post 141 are detachably connected. The three support pieces 143 form a cylindrical channel. Through the cooperation between the three support frames 14, the establishment of a channel for probing tissue wounds is realized.

[0029] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A minimally invasive spinal retractor, comprising a retraction mechanism (1), said retraction mechanism (1) comprising a base (11), a middle ring (12), and an upper ring (13), characterized in that, The middle ring (12) is located between the base (11) and the upper ring (13). Three limiting openings (121) are equally spaced around the middle ring (12). Each limiting opening (121) is movably connected to a support frame (14). A notch (122) is provided on one side edge of the middle ring (12). A spring piece (15) is provided in the notch (122). A positioning block (151) is provided on the spring piece (15). The positioning block (151) is engaged with a positioning hole (132). The positioning hole (132) is located on the lower side of the upper ring (13), and the positioning holes (132) are evenly distributed.

2. The spinal minimally invasive retractor according to claim 1, characterized in that, The support frame (14) includes a guide post (141), a connecting part (142) and a support plate (143), and the connecting part (142) and the lower end of the guide post (141) are detachably connected.

3. The spinal minimally invasive retractor according to claim 2, characterized in that, The three spreading pieces (143) form a channel in the cylindrical structure.

4. The minimally invasive spinal retractor according to claim 1, characterized in that, The base (11) and the upper ring (13) are connected by threads.

5. The spinal minimally invasive retractor according to claim 1, characterized in that, The upper ring (13) is provided with three arc-shaped openings (131) at equal intervals, and each arc-shaped opening (131) is movably connected to the upper end of the corresponding guide post (141).

6. The spinal minimally invasive retractor according to claim 1, characterized in that, A handle (2) is bolted to one side of the lower surface of the middle ring (12).

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