Guiding retractor
By designing a guide retractor and using a push method and lever principle to optimize instrument insertion, the problems of tissue resistance and operational inconvenience in minimally invasive surgery are solved, achieving a larger operating space and less effort for the assistant.
Patent Information
- Application Number
- CN202322188141.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-15
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2033-08-15
AI Technical Summary
Existing medical devices have problems with limited operating space and difficulty in coordination during minimally invasive surgery due to the large resistance of human tissue and the inconvenience of assistant operation.
A guided retractor was designed that uses a pushing method instead of the traditional pulling method, uses the lever principle to reduce tissue obstruction, and optimizes the instrument insertion depth through a sleeve and a limit plate. The assistant can stand on the same side of the surgeon to operate.
It increases the operating space for minimally invasive surgery, reduces instrument obstruction, makes the assistant's operation more labor-saving and the coordination with the surgeon smoother.
Smart Images
Figure CN223350238U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical instruments, in particular to a guide retractor. Background Art
[0002] With the continuous development of endoscopic technology, UBE has gradually replaced traditional open surgery, but the corresponding medical equipment has not been improved in time. When performing spinal surgery, retractors are needed to pull the nerve roots. However, due to the obstruction of the human body's skin, muscles, spine and other tissues, the retractors are more laborious to pull. If it is an open surgery with a large incision, this situation is not very obvious. However, when performing UBE, the incision is very small, and the retractors need to be lifted and pried. The incision is only 1-2 cm, and there is a possibility that the instrument will block the channel, making the operating space more limited.
[0003] There is an improved retractor with a channel on the market. After the retractor is tilted, the instrument can be inserted through the channel for operation. However, there are still two problems that have not been solved. First, the resistance of the human body's muscles, spinous processes and other tissues still exists, and the traction effect is poor. Second, the assistant needs to stand on the opposite side of the attending physician during the operation, with his back to the monitor, which leads to poor coordination. Utility Model Content
[0004] In view of the deficiencies in the prior art, the present invention provides a guide retractor to solve the problems mentioned in the above background.
[0005] The utility model provides the following technical solutions:
[0006] The utility model discloses a guide retractor, comprising a sleeve,
[0007] A handle is fixed to one side of the outer wall of the top of the casing;
[0008] The guide slope is set at the bottom of the casing and is an inclined section;
[0009] A limiting plate, the top of which is connected to the lower end of the guide slope;
[0010] The push hook is located at the lower end of the limiting plate, is bent in the opposite direction to the handle.
[0011] Furthermore, an anti-slip rod is fixed to one end of the handle away from the sleeve.
[0012] Furthermore, the outer diameter of the sleeve is 15 mm and the inner diameter is 13 mm.
[0013] Furthermore, the outer diameter of the sleeve is 7 mm and the inner diameter is 5 mm.
[0014] Furthermore, the length of the limiting plate is 40 mm.
[0015] Furthermore, the push hook has a width of 4 mm.
[0016] Compared with the prior art, the present invention has the following beneficial effects:
[0017] The utility model changes pulling into pushing, designs the position of the handle and the retractor in the opposite direction, utilizes the lever principle to tilt and poke, and rotates with the position of the limit rod as the fulcrum, thereby reducing the obstruction of human tissues such as skin, muscles, and spine. After adding the sleeve, the obstruction problem of the instrument is reduced.
[0018] The utility model enables the assistant to move from the opposite side to the same side of the surgeon through the pushing operation of the retractor, which is convenient for the assistant to observe the display and make adjustments at any time, and is more conducive to the cooperation in the operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a three-dimensional structural diagram of the utility model;
[0020] Figure 2 This is a front view of the existing retractor;
[0021] Figure 3 It is a front view of the utility model;
[0022] Figure 4 This is a schematic diagram of the operation of the utility model;
[0023] The numbers in the figure represent: 1. sleeve; 2. handle; 3. anti-slip rod; 4. guide slope; 5. limit plate; 6. push hook. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0025] See also Figure 1-4In the first embodiment, it includes a cannula 1 with an outer diameter of 15 mm and an inner diameter of 13 mm. This type of retractor is mainly used for fusion surgery to facilitate the injection of cages, which are generally 12-14 mm in size. The handle 2 is fixed to one side of the top outer wall of the cannula 1; the guide slope 4 is set at the bottom of the cannula 1 and is an inclined section. The angle of the guide slope 4 is 45°, which is conducive to the insertion of the cannula 1 into the tissue. The top of the limiting plate 5 is connected to the lower end of the guide slope 4, and the length of the limiting plate 5 is 40 mm. One side is in the shape of an arc. The limiting plate 5 is used to limit the insertion depth of the nerve rod retractor to prevent the push hook 6 from pulling the nerve root too deeply. The push hook 6 is located at the lower end of the limiting plate 5, is reversely bent, and is in the opposite direction of the handle 2. The width of the push hook 6 is 4 mm. One side of the push hook 6 is in the shape of an arc and the edge is thinner, which has a certain protective function for the nerve root. The push hook 6 and the limit plate 5 are at an angle of 75-120 degrees. The sleeve 1, guide slope 4, limit plate 5 and push hook 6 are an integrated structure. The handle 2 is set in opposite directions to the push hook 6, so that the assistant can push the anti-slip rod 3 through the handle 2 during operation, and then lift the tissue at the incision position through the limit plate 5, and the surgeon can use the instrument.
[0026] An anti-slip rod 3 is fixed to one end of the handle 2 away from the sleeve 1. The anti-slip rod 3 can reduce the probability of the retractor and the hand of the user slipping or detaching during operation.
[0027] In the second embodiment, the outer diameter of the sleeve rod 1 is 7 mm and the inner diameter is 5 mm. This type of retractor is mainly used for decompression and can facilitate operations such as removing the nucleus pulposus and suturing the annulus fibrosus.
[0028] The new guide retractor used in this paper is a commonly used surgical instrument. It not only has a compact structure and a simple manufacturing process, but also can use the lever principle to shift the incision when the retractor is used, so that the instrument operation space is larger than the space used by traditional nerve root retractors. While it is convenient for the attending physician to operate, it is also more labor-saving for the assistant.
[0029] Working principle: When performing minimally invasive surgery for lumbar disc herniation, the assistant can stand on the same side of the surgeon to facilitate the assistant's operation, enable the assistant to better observe the display screen, and better cooperate with the surgeon. First, the surface position of the observation channel (view) and the instrument operation channel (work) is determined by fluoroscopy (hereinafter referred to as the observation channel V channel and the instrument operation channel W channel). In this case, the lower edge of the L5 vertebral plate and the upper edge of the S1 vertebral plate were selected as the positioning points of the V channel and the W channel respectively. After the surgical incision, a 0° or 30° arthroscopic device was inserted into the V channel incision, and a radiofrequency plasma knife was used in the W channel incision to clean the muscle tissue on the surface of the vertebral plate space (to create a cavity), exposing the lumbar L5 lower vertebral plate and the S1 upper vertebral plate. The lumbar plate lumbar bone clamp and high-speed grinding drill were used to process the lower edge of the L5 lower vertebral plate, the upper edge of the S1 upper vertebral plate, the medial edge of the articular process joint and the ventral side of the L5 spinous process, expose and separate the yellow ligament and remove it to enter the spinal canal. At this time, a guide retractor is inserted into the W channel incision. The guide slope 4 on the guide retractor helps to establish the channel, and the sleeve 1 is smoothly inserted into the tissue. The limit plate 5 is used to limit the insertion depth of the nerve retractor to strip the nerve root. When the assistant operates the guide retractor, the limit plate 5 can be used as a fulcrum to lift the incision to make the incision more convenient for the instrument to operate. In addition, the guide retractor can insert various operating instruments such as scrapers, reamers, nucleus pulposus forceps, implant cages, etc. into the sleeve 1 according to the dynamic operation requirements during the operation, and operate the guide retractor to strip and protect the nerve root.
[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A guide retractor comprising a cannula (1), Its characteristics are: A handle (2) is fixed to one side of the top outer wall of the sleeve (1); A guide slope (4) is provided at the bottom of the casing (1) and is an inclined section; A limit plate (5), the top of which is connected to the lower end of the guide slope (4); The push hook (6) is located at the lower end of the limit plate (5), is bent in the reverse direction, and is in the opposite direction to the handle (2); The outer diameter of the sleeve (1) is 15 mm and the inner diameter is 13 mm.
2. The guide retractor according to claim 1, characterized in that: An anti-slip rod (3) is fixed to one end of the handle (2) away from the sleeve (1).
3. The guide retractor according to claim 1, characterized in that: The length of the limiting plate (5) is 40 mm.
4. The guide retractor according to claim 1, characterized in that: The width of the push hook (6) is 4 mm.