Retractor for neurosurgery department
By introducing angle and depth adjustment components into the retractor, the problem of inflexible adjustment of existing retractors is solved, and flexible adjustment of the height, angle and depth of the retractor is achieved, thereby improving the stability and safety of the surgery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2026-03-03
AI Technical Summary
Existing retractors cannot flexibly adjust height and angle when adjusting the surgical field of view, and their reliance on manual control leads to unstable retraction distance and force, which can easily cause secondary injury to the patient.
A retractor for neurosurgery was designed, comprising an angle adjustment component and a depth adjustment component. Through a structure including a bidirectional lead screw, a moving plate, a knob, and a drive shaft, the height, angle, and depth of the retractor can be flexibly adjusted, reducing human intervention and improving stability.
It enables flexible adjustment of the height, angle, and depth of the retractor, improving the flexibility and stability of the surgery and avoiding instability and secondary damage caused by manual control.
Smart Images
Figure CN223958838U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of medical auxiliary equipment, specifically a retractor for neurosurgery. Background Technology
[0002] During neurosurgical cranial or spinal surgery, incisions are necessary to expose the lesion. The skin and muscle tissue at the incision site need to be pulled laterally to create a visible surgical field, facilitating the exposure of nerve tissue and allowing the surgeon to see clearly and perform surgery within the wound. This is where retractors come in. Retractors are used to pull tissue apart, revealing the surgical field and facilitating exploration and manipulation.
[0003] A commonly used retractor is a lever-based device, similar in shape to scissors, with a positioning device at one end and a rake-like structure at the other that can be inserted into the wound. However, its shortcomings are that existing retractors are mostly adjusted laterally to adjust the distance between the two forceps to expose the surgical area. But the depth and angle of the surgical surface are different, and the height of the forceps cannot be adjusted, reducing the flexibility of the retractor. Furthermore, the distance and size of the retraction are controlled manually, and since human force cannot be maintained for a long time, the distance, size, and fixation of the retraction are unstable. This not only easily affects the surgical outcome, but also makes it difficult to ensure the retraction force, and it is easy to cause secondary injury to the patient due to excessive force. Utility Model Content
[0004] To address the shortcomings of existing technologies, this invention provides a retractor for neurosurgery.
[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:
[0006] This utility model discloses a retractor for neurosurgery, comprising a mounting frame, an angle adjustment component on the mounting frame, and a mounting plate mounted on the angle adjustment component. A bidirectional lead screw is rotatably mounted inside the mounting plate, with one end of the bidirectional lead screw extending outside the mounting plate and fixedly mounted with a rotating wheel. Movable plates are threaded onto the outer surfaces of both ends of the bidirectional lead screw. The mounting plate has a sliding groove for the movable plates to slide. A drive shaft is rotatably mounted inside the mounting plate, with one end of the drive shaft extending outside the mounting plate and fixedly mounted with a knob. A sliding sleeve for the drive shaft to pass through is rotatably mounted on each movable plate. A transmission shaft is rotatably mounted on the movable plate. A mounting box is fixedly mounted on the end of the movable plate away from the mounting plate, and a retractor piece is slidably mounted inside the mounting box. Each movable plate is provided with a depth adjustment component for adjusting the retraction depth of the retractor piece.
[0007] As a preferred embodiment of this utility model, the depth adjustment assembly includes a first bevel gear fixedly mounted on a sliding sleeve, a second bevel gear meshing with the first bevel gear fixedly mounted at one end of the transmission shaft, the other end of the transmission shaft extending into the mounting box and fixedly mounted with a worm gear, a threaded rod rotatably mounted inside the mounting box, and a worm wheel meshing with the worm gear on the same side fixedly mounted on the outer surface of the threaded rod, a lifting plate threadedly mounted on the outer surface of the threaded rod, and the top end of the lifting plate extending into the mounting box and fixedly connected to the lifting plate on the same side.
[0008] As a preferred technical solution of this utility model, a plurality of locking strips are fixedly installed on the drive shaft, and a plurality of slots are provided on the sliding sleeve to cooperate with the locking strips. The locking strips slide in the slots on the same side.
[0009] As a preferred embodiment of this utility model, the lifting plate is rectangular in shape and slides in close contact with the mounting box on the same side.
[0010] As a preferred technical solution of this utility model, the two traction plates are arranged symmetrically.
[0011] As a preferred embodiment of the present invention, the angle adjustment assembly includes a first ball sleeve fixedly mounted on a mounting bracket, a first ball head rotatably mounted inside the first ball sleeve, and a first adjusting rod fixedly connected to one end of the first ball head extending out of the first ball sleeve. A second ball sleeve is fixedly mounted to one end of the first adjusting rod away from the first ball head, a second ball head rotatably mounted inside the second ball sleeve, and a second adjusting rod fixedly mounted on the second ball head. The second adjusting rod is detachably connected to the mounting plate.
[0012] As a preferred embodiment of this utility model, both the first and second ball sleeves are threaded with tightening screws.
[0013] The beneficial effects of this utility model are:
[0014] 1. This neurosurgical retractor, by incorporating a depth adjustment component, allows the rotation of a knob to drive a drive shaft. This drive shaft, in conjunction with a locking strip and a locking groove, rotates a sliding sleeve. The sliding sleeve's rotation, through a first and second bevel gear, drives a transmission shaft. This transmission shaft, in turn, drives a threaded rod via a worm gear and a worm wheel. The threaded rod's rotation causes the lifting and retraction plates to move up and down. This allows for adaptive adjustment of the retraction depth during surgery based on the depth of the patient's incision and the specific operational needs, eliminating the need for repeated retraction operations and improving the device's flexibility and practicality.
[0015] 2. This neurosurgical retractor, consisting of a bidirectional screw, a moving block, a knob, and a mounting frame, is fixed in a suitable position according to the surgical location. Rotating the wheel drives the bidirectional screw, which in turn moves two moving plates away from each other. This movement of the moving plates causes the mounting box and retractor plates to follow suit, thus opening the patient's incision. This facilitates treatment of the affected area within the incision by medical personnel without the need for manual traction, allowing for better control of the retraction distance and force. Furthermore, the self-locking characteristic of the bidirectional screw thread ensures stability of the retractor plates during incision opening, improving medical efficiency and preventing secondary injury to the patient.
[0016] 3. This neurosurgical retractor, by setting an angle adjustment component, releases the lock on the first ball head by turning the tightening screw. Then, with the rotation of the first ball head and the first ball sleeve, the position between the first adjusting rod and the mounting frame is adjusted. After the adjustment is completed, the position between the first adjusting rod and the second adjusting rod is adjusted in the same way. This makes it easy to adjust the retraction angle and retraction position of the retractor according to the actual use requirements. It is highly flexible and practical. Attached Figure Description
[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0018] Figure 1 This is a schematic diagram of the overall structure of a retractor for neurosurgery according to this utility model;
[0019] Figure 2 This is a schematic cross-sectional view of the mounting plate of a retractor for neurosurgery according to this utility model.
[0020] Figure 3 This is a schematic diagram of the sliding sleeve structure of a retractor for neurosurgery according to this utility model;
[0021] Figure 4 This is a cross-sectional structural diagram of the mounting box for a neurosurgical retractor according to this utility model;
[0022] Figure 5 This is a schematic diagram of the slot structure of a retractor for neurosurgery according to this utility model.
[0023] In the diagram: 1. Mounting bracket; 2. Mounting plate; 3. Double-acting lead screw; 4. Moving plate; 5. Drive shaft; 6. Sliding sleeve; 7. Transmission shaft; 8. Mounting box; 9. Pulling plate; 10. First bevel gear; 11. Second bevel gear; 12. Worm gear; 13. Threaded rod; 14. Worm wheel; 15. Lifting plate; 16. Locking strip; 17. Locking groove; 18. First ball sleeve; 19. First ball head; 20. First adjusting rod; 21. Second ball sleeve; 22. Second ball head; 23. Second adjusting rod; 24. Tightening screw. Detailed Implementation
[0024] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.
[0025] Example: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, this utility model discloses a retractor for neurosurgery, comprising a mounting frame 1, an angle adjustment assembly on the mounting frame 1, and a mounting plate 2 mounted on the mounting plate 2. A bidirectional lead screw 3 is rotatably mounted inside the mounting plate 2, with one end of the bidirectional lead screw 3 extending outside the mounting plate 2 and fixedly mounted with a rotating wheel. Movable plates 4 are threaded onto the outer surfaces of both ends of the bidirectional lead screw 3. A sliding groove is provided on the mounting plate 2 for the movable plates 4 to slide. A drive shaft 5 is rotatably mounted inside the mounting plate 2, with one end of the drive shaft 5 extending outside the mounting plate 2 and fixedly mounted with a knob. A sliding sleeve 6 for the drive shaft 5 to pass through is rotatably mounted on each movable plate 4. A transmission shaft 7 is rotatably mounted on the movable plate 4. A mounting box 8 is fixedly mounted on the end of the movable plate 4 away from the mounting plate 2, and a sliding device is installed inside the mounting box 8. The device includes a retraction plate 9. Each movable plate 4 is equipped with a depth adjustment component for adjusting the traction depth of the retraction plate 9. When a patient undergoes neurosurgery, the mounting bracket 1 is fixed in a suitable position according to the surgical location. Then, the rotating wheel drives the bidirectional screw 3 to rotate. The rotation of the bidirectional screw 3 causes the two movable plates 4 to move away from each other. The movement of the movable plates 4 causes the mounting box 8 and the retraction plate 9 to move accordingly, thereby opening the patient's incision by making it easier for medical personnel to treat the affected area within the incision without manual traction. This facilitates control of the traction distance and force. Furthermore, the self-locking characteristic of the thread of the bidirectional screw 3 makes the retraction plate 9 relatively stable during the process of opening the incision, improving medical efficiency and avoiding secondary damage to the patient.
[0026] The depth adjustment assembly includes a first bevel gear 10 fixedly mounted on the sliding sleeve 6, a second bevel gear 11 meshing with the first bevel gear 10 fixedly mounted at one end of the drive shaft 7, a worm gear 12 fixedly mounted at the other end of the drive shaft 7 extending into the mounting box 8, a threaded rod 13 rotatably mounted inside the mounting box 8, and a worm wheel 14 meshing with the worm gear 12 on the same side fixedly mounted on the outer surface of the threaded rod 13, a lifting plate 15 threadedly mounted on the outer surface of the threaded rod 13, a pull-out plate 9 extending into the mounting box 8 and fixedly connected to the lifting plate 15 on the same side, a plurality of retaining strips 16 fixedly mounted on the drive shaft 5, and a plurality of retaining strips 16 used in conjunction with the sliding sleeve 6. The card slot 17 and the card strip 16 slide together in the card slot 17 on the same side. Rotating the knob drives the drive shaft 5 to rotate. The rotation of the drive shaft 5, in conjunction with the card strip 16 and the card slot 17, drives the sliding sleeve 6 to rotate. The rotation of the sliding sleeve 6 drives the transmission shaft 7 to rotate through the first bevel gear 10 and the second bevel gear 11. The rotation of the transmission shaft 7 drives the threaded rod 13 to rotate through the worm gear 12 and the worm wheel 14. The rotation of the threaded rod 13 drives the lifting plate 15 and the retraction plate 9 to move up and down. Thus, during the operation, the retraction depth of the retraction plate 9 can be adaptively adjusted according to the depth of the patient's incision and the actual needs of the operation, without having to repeat the retraction operation, which improves the flexibility and practicality of the device.
[0027] The lifting plate 15 is rectangular in shape and slides close to the mounting box 8 on the same side. This can prevent the lifting plate 15 from shifting or rotating when it moves on the threaded rod 13, thus ensuring the stability of the lifting plate 15 and the pulling plate 9 when they move up and down.
[0028] Among them, the two retraction plates are symmetrically arranged to facilitate the retraction operation at the patient's incision site.
[0029] The angle adjustment assembly includes a first ball sleeve 18 fixedly mounted on the mounting bracket 1. A first ball head 19 is rotatably mounted inside the first ball sleeve 18, and a first adjusting rod 20 is fixedly connected to one end of the first ball head 19 extending out of the first ball sleeve 18. A second ball sleeve 21 is fixedly mounted to one end of the first adjusting rod 20 away from the first ball head 19. A second ball head 22 is rotatably mounted inside the second ball sleeve 21, and a second adjusting rod 23 is fixedly mounted on the second ball head 22. The second adjusting rod 23 is detachably connected to the mounting plate 2. A tightening screw 24 is threaded into both the first ball sleeve 18 and the second ball sleeve 21. Tightening the tightening screw 24 releases the tension on the first ball head 18. The head 19 is locked, and then the position between the first adjusting rod 20 and the mounting bracket 1 is adjusted under the rotational cooperation of the first ball head 19 and the first ball sleeve 18. After the adjustment is completed, the position between the first adjusting rod 20 and the second adjusting rod 23 is adjusted in the same way, so as to facilitate the adjustment of the opening angle and opening position of the opening piece 9 according to the actual use requirements. It has high flexibility and strong practicality. The second adjusting rod 23 is detachably connected to the mounting plate 2, which facilitates the disassembly of the mounting plate 2. It is beneficial to adopt different fixing methods as needed in actual use, further improving the flexibility and convenience of the device.
[0030] During operation, when a patient undergoes neurosurgical surgery, the mounting bracket 1 is fixed in a suitable position according to the surgical location. The locking screw 24 is turned to release the lock on the first ball head 19. Then, with the rotational cooperation of the first ball head 19 and the first ball sleeve 18, the position between the first adjusting rod 20 and the mounting bracket 1 is adjusted. After the adjustment is completed, the position between the first adjusting rod 20 and the second adjusting rod 23 is adjusted in the same way, so as to facilitate the adjustment of the retraction angle and retraction position of the retraction piece 9 according to the actual use requirements.
[0031] Then, the retraction depth of the retraction piece 9 is adaptively adjusted according to the depth of the patient's incision and the actual operational needs. Rotating the knob drives the drive shaft 5 to rotate. The rotation of the drive shaft 5, in conjunction with the locking strip 16 and the locking groove 17, drives the sliding sleeve 6 to rotate. The rotation of the sliding sleeve 6 drives the transmission shaft 7 to rotate through the first bevel gear 10 and the second bevel gear 11. The rotation of the transmission shaft 7 drives the threaded rod 13 to rotate through the worm gear 12 and the worm wheel 14. The rotation of the threaded rod 13 drives the lifting plate 15 and the retraction piece 9 to move up and down, thus completing the adjustment of the retraction depth of the retraction piece 9. The retraction depth of the retraction piece 9 can be adaptively adjusted according to the depth of the patient's incision and the actual needs of the operation, which improves the flexibility and practicality of the device. Then, the rotating wheel drives the bidirectional screw 3 to rotate. The rotation of the bidirectional screw 3 drives the two moving plates 4 to move away from each other. The movement of the moving plates 4 drives the mounting box 8 and the retraction piece 9 to follow the movement, so that the two retraction pieces 9 move away from each other and open up the patient's incision, making it easier for medical staff to treat the affected area in the incision without manual traction, and making it easy to control the distance and force of traction.
[0032] In addition, the second adjusting rod 23 is detachably connected to the mounting plate 2, which facilitates the disassembly of the mounting plate 2 and allows for different fixing methods to be used as needed during actual use, further improving the flexibility and convenience of the device.
[0033] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A neurosurgical retractor, comprising a mounting frame (1), characterized in that, An angle adjustment assembly is provided on the mounting bracket (1), and a mounting plate (2) is provided through the angle adjustment assembly. A bidirectional lead screw (3) is rotatably mounted inside the mounting plate (2), and one end of the bidirectional lead screw (3) extends outside the mounting plate (2) and is fixedly mounted with a rotating wheel. A movable plate (4) is threadedly mounted on the outer surface of both ends of the bidirectional lead screw (3). A sliding groove is provided on the mounting plate (2) for the movable plate (4) to slide. A drive shaft (5) is rotatably mounted inside the mounting plate (2), and the drive shaft (5) has... One end extends to the outside of the mounting plate (2) and is fixedly mounted with a knob. Each of the moving plates (4) is rotatably mounted with a sliding sleeve (6) through which the drive shaft (5) passes. A transmission shaft (7) is rotatably mounted on the moving plate (4). A mounting box (8) is fixedly mounted on the end of the moving plate (4) away from the mounting plate (2), and a pulling piece (9) is slidably mounted inside the mounting box (8). Each of the moving plates (4) is provided with a depth adjustment component for adjusting the pulling depth of the pulling piece (9).
2. The neurosurgical retractor according to claim 1, characterized in that, The depth adjustment assembly includes a first bevel gear (10) fixedly mounted on a sliding sleeve (6), a second bevel gear (11) meshing with the first bevel gear (10) fixedly mounted at one end of the drive shaft (7), a worm gear (12) fixedly mounted at the other end of the drive shaft (7) extending into the mounting box (8), a threaded rod (13) rotatably mounted in the mounting box (8), and a worm wheel (14) meshing with the worm gear (12) on the outer surface of the threaded rod (13), a lifting plate (15) threadedly mounted on the outer surface of the threaded rod (13), and the top end of the pulling plate (9) extending into the mounting box (8) and fixedly connected to the lifting plate (15) on the same side.
3. A neurosurgical retractor according to claim 2, characterized in that, Multiple locking strips (16) are fixedly installed on the drive shaft (5), and multiple slots (17) are provided on the sliding sleeve (6) to cooperate with the locking strips (16). The locking strips (16) slide in the slots (17) on the same side.
4. A neurosurgical retractor according to claim 2, characterized in that, The lifting plate (15) is rectangular in shape and slides in close contact with the mounting box (8) on the same side.
5. A neurosurgical retractor according to claim 2, characterized in that, The two pull-out pieces (9) are arranged symmetrically.
6. A neurosurgical retractor according to claim 1, characterized in that, The angle adjustment assembly includes a first ball sleeve (18) fixedly mounted on the mounting bracket (1), a first ball head (19) rotatably mounted inside the first ball sleeve (18), and a first adjusting rod (20) fixedly connected to one end of the first ball head (19) extending out of the first ball sleeve (18). A second ball sleeve (21) is fixedly mounted at one end of the first adjusting rod (20) away from the first ball head (19). A second ball head (22) is rotatably mounted inside the second ball sleeve (21), and a second adjusting rod (23) is fixedly mounted on the second ball head (22). The second adjusting rod (23) is detachably connected to the mounting plate (2).
7. A neurosurgical retractor according to claim 6, characterized in that, Both the first ball sleeve (18) and the second ball sleeve (21) are threaded with tightening screws (24).