Minimally invasive channel dilator

Abstract

The utility model discloses a minimally invasive channel dilator, and relates to the technical field of extension or traction. The minimally invasive channel dilator comprises a minimally invasive channel dilator body, the upper end of the minimally invasive channel dilator body is fixedly connected with two dilator connecting shafts, and the surface of the dilator connecting shaft on the left side is rotationally sleeved with a detachable dilator connecting plate; the dilation assembly is arranged on the surface of the dilator connecting plate, the surface of the dilator connecting plate is fixedly connected with a box body, an adjusting assembly is arranged in the box body, dilation blades are stretched through a connecting rope, the dilation blades can dilate a minimally invasive channel conveniently, the dilation blades are limited through nuts, and the dilation assembly is arranged on the surface of the dilator connecting plate. According to the dilator, the dilation blades with different lengths can be conveniently fixed according to different wound depths, the wound can be completely dilated in the actual lumbar vertebra operation process, the operation view can be conveniently widened, the operation can be conveniently carried out, the convenience and practicability of the dilator are improved, and the operation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of extension or traction, in particular to a minimally invasive channel dilator. Background Art

[0002] The surgical technique is widely used in minimally invasive surgery for cervical, thoracic and lumbar spine diseases. At present, it is mainly used in minimally invasive surgery for lumbar disc herniation and lumbar spinal stenosis in China. The technology uses fluoroscopic positioning to make two incisions about 1-1.5 cm long in the skin on the back of the spine and uses an expansion channel to directly reach the spinal surgical decompression area. The two incisions are used as observation port and operation port respectively. The observation port is used as the entrance for spinal endoscope to realize real-time monitoring of all surgical operations under the endoscope. The operation port is used as a minimally invasive surgical instrument to enter the surgical area through the skin and muscles to perform decompression and other operations.

[0003] Since the surgical incision of endoscopic disc surgery is smaller than that of traditional open surgery, the traditional incision expander can no longer meet the needs of endoscopic disc surgery. However, due to the small incision and deep surgical depth, if the traditional expander is simply proportionally reduced, it cannot meet the requirements when used. Although the outer side of the incision is expanded, the inside cannot be fully expanded, which can easily affect the surgical field of view, making it inconvenient to perform the surgery and affecting the progress of the surgery. Therefore, a minimally invasive channel expander is needed to meet surgical needs. Utility Model Content

[0004] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide a minimally invasive channel dilator that can solve the problem that traditional disc surgery incision dilators can no longer meet the needs of disc endoscopic surgery. However, due to the small incision and deep relative surgical depth, if the traditional dilator is simply proportionally reduced, it cannot meet the requirements when used. Although the outer side of the incision is expanded, the inner side cannot be fully expanded, which can easily affect the surgical field of view, making it inconvenient to perform the surgery and affecting the progress of the surgery.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a minimally invasive channel dilator, comprising a minimally invasive channel dilator body, the upper end of which is fixedly connected to two dilator connecting shafts, and a detachable dilator connecting plate is rotatably sleeved on the surface of the dilator connecting shaft on the left side;

[0006] An expansion assembly, the expansion assembly is arranged on the surface of the expander connecting plate, and the adjustment assembly includes an expander rotating shaft, and the expander rotating shaft is fixedly connected to the surface of the expander connecting plate;

[0007] The surface of the expander shaft is rotatably connected to the expander fixing rod, the surface of the expander connecting plate is fixedly connected to the box body, and the inside of the box body is provided with an adjusting component.

[0008] Preferably, the expansion assembly further comprises an expander movable rod, and the expander movable rod is slidably connected inside the expander fixed rod;

[0009] The end of the expander movable rod away from the expander fixed rod is fixedly connected to the expander blade fixed rod, the surface of the expander blade fixed rod is provided with a thread, and the surface of the expander blade fixed rod is provided with a through groove;

[0010] Wherein, a nut is threadedly sleeved on the surface of the expansion blade fixing rod, and the expansion blade is slidably connected to the inner wall of the through groove.

[0011] Preferably, the adjustment assembly includes a first rotating shaft, and the first rotating shaft is rotatably connected to the inside of the box;

[0012] The surface of the first rotating shaft is fixedly connected with a ratchet, the surface of the first rotating shaft is fixedly connected with a reel, the upper end of the first rotating shaft is fixedly connected with a first adjustment handle, the surface of the reel is wound with a connecting rope, and one end of the connecting rope away from the reel is fixedly connected to the expander fixing rod;

[0013] Among them, a second rotating shaft is rotatably connected inside the box body, a ratchet paddle is fixedly connected to the surface of the second rotating shaft, a second adjustment handle is fixedly connected to the upper end of the second rotating shaft, the ratchet paddle is in contact with the ratchet, and a spring is arranged inside the box body, and both ends of the spring are fixedly connected to the box body and the ratchet paddle respectively.

[0014] Preferably, there are two expansion components and two adjustment components, which are symmetrically arranged at two ends of the expander connecting plate.

[0015] Preferably, the two expansion blade fixing rods are both truncated cone-shaped, and the lower ends of the two expansion blades are both arc-shaped.

[0016] Preferably, both ends of the minimally invasive channel dilator body are fixedly connected with dilator fixing bands, and the ends of the two dilator fixing bands away from the minimally invasive channel dilator body are fixedly connected by buckles.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The minimally invasive channel expander stretches the expansion blades through the connecting rope, so that the expansion blades can expand the minimally invasive channel. The expansion blades are limited by nuts, so that expansion blades of different lengths can be fixed according to different wound depths. This makes it easy to fully expand the wound during actual lumbar surgery, broaden the surgical field of view, and facilitate the operation. The convenience and practicality of the expander are improved, and the surgical efficiency is improved.

[0019] The minimally invasive channel dilator is easy to adjust the dilator blade fixing rod according to different surgical positions by rotating the dilator connecting plate on the surface of the dilator connecting shaft and sliding the dilator movable rod inside the dilator fixing rod, thereby improving the practicality and convenience of the dilator. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0021] Figure 1 This is a schematic diagram of the structure of a minimally invasive channel dilator of the utility model;

[0022] Figure 2 This is a schematic diagram of the main body of the minimally invasive channel dilator of the utility model;

[0023] Figure 3 This is a schematic diagram of the expansion device connection plate of the utility model;

[0024] Figure 4 This is a schematic diagram of the box of the utility model;

[0025] Figure 5 It is a schematic diagram of the expansion blade of the utility model.

[0026] Figure numerals: 1. Minimally invasive channel dilator body; 2. dilator fixing belt; 3. buckle; 4. dilator connecting shaft; 5. dilator connecting plate; 6. dilator rotating shaft; 7. dilator fixing rod; 8. dilator movable rod; 9. box body; 10. connecting rope; 11. dilator blade fixing rod; 12. nut; 13. dilator blade; 14. through groove; 15. ratchet; 16. reel; 17. first rotating shaft; 18. first adjustment handle; 19. ratchet paddle; 20. spring; 21. second rotating shaft; 22. second adjustment handle. DETAILED DESCRIPTION

[0027] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0028] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the present utility model, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] See also Figure 1-5 The utility model provides a technical solution: a minimally invasive channel dilator, including a minimally invasive channel dilator body 1, the upper end of the minimally invasive channel dilator body 1 is fixedly connected to two dilator connecting shafts 4, the surface of the dilator connecting shaft 4 on the left side is rotatably sleeved with a detachable dilator connecting plate 5, an expansion component, the expansion component is arranged on the surface of the dilator connecting plate 5, the adjustment component includes an dilator rotating shaft 6, the dilator rotating shaft 6 is fixedly connected to the surface of the dilator connecting plate 5, the surface of the dilator rotating shaft 6 is rotatably connected with an dilator fixing rod 7, the surface of the dilator connecting plate 5 is fixedly connected to a box 9, and the inside of the box 9 is provided with an adjustment component.

[0032] The expansion assembly also includes an expander movable rod 8, which is slidably connected to the inside of the expander fixed rod 7. The end of the expander movable rod 8 away from the expander fixed rod 7 is fixedly connected to the expansion blade fixed rod 11. The surface of the expansion blade fixed rod 11 is provided with a thread, and the surface of the expansion blade fixed rod 11 is provided with a through groove 14. The surface of the expansion blade fixed rod 11 is threadedly sleeved with a nut 12, and the inner wall of the through groove 14 is slidably connected to the expansion blade 13.

[0033] The adjusting assembly includes a first rotating shaft 17, which is rotatably connected to the interior of the box body 9, a ratchet 15 is fixedly connected to the surface of the first rotating shaft 17, a reel 16 is fixedly connected to the surface of the first rotating shaft 17, a first adjusting handle 18 is fixedly connected to the upper end of the first rotating shaft 17, a connecting rope 10 is wound around the surface of the reel 16, and the end of the connecting rope 10 away from the reel 16 is fixedly connected to the expander fixing rod 7, a second rotating shaft 21 is rotatably connected to the interior of the box body 9, a ratchet paddle 19 is fixedly connected to the surface of the second rotating shaft 21, a second adjusting handle 22 is fixedly connected to the upper end of the second rotating shaft 21, the ratchet paddle 19 is in contact with the ratchet 15, a spring 20 is arranged inside the box body 9, and the two ends of the spring 20 are respectively fixedly connected to the box body 9 and the ratchet paddle 19.

[0034] There are two expansion components and two adjustment components, which are symmetrically arranged at the two ends of the expander connecting plate 5. The two expansion blade fixing rods 11 are both truncated cone-shaped, and the lower ends of the two expansion blades 13 are arc-shaped. Both ends of the minimally invasive channel expander body 1 are fixedly connected with expander fixing belts 2, and the two expander fixing belts 2 are fixedly connected at one end away from the minimally invasive channel expander body 1 by a buckle 3.

[0035] When using the expander, first use the expander fixing belt 2 and the buckle 3 to fix the minimally invasive channel expander body 1 on the waist of the patient who is preparing to undergo lumbar surgery, then use a scalpel to make a small incision on the patient's waist, use the expander blade 13 to open the wound, then connect the expander connecting plate 5 to the expander connecting shaft 4, and insert the expander blade 13 into the interior of the through groove 14, turn the nut 12 to squeeze the expansion blade fixing rod 11 and the through groove 14, so as to facilitate the fixation of the expansion blade 13. Different lengths of expansion blades 13 can be fixed according to different wound depths, so as to facilitate the complete expansion of the wound during the actual lumbar surgery, to open the surgical field of view and to facilitate the operation.

[0036] By sliding the expander movable rod 8 inside the expander fixed rod 7, the position of the expansion blade 13 can be adjusted according to the position of the wound, so as to expand the minimally invasive channel. By rotating the expander connecting plate 5 on the surface of the expander connecting shaft 4, the angle of the expander connecting plate can be adjusted according to the wound at different positions, so as to facilitate the connection between the expansion blade fixed rod 11 and the expansion blade 13.

[0037] The first rotating shaft 17 is driven to rotate by rotating the first adjusting handle 18, and the first rotating shaft 17 drives the reel 16 and the ratchet 15 to rotate, the reel 16 tightens the connecting rope 10, and the connecting rope 10 drives the expander fixing rod 7 and the expander movable rod 8 to rotate, and the expander movable rod 8 drives the expansion blade fixing rod 11, the nut 12 and the expansion blade 13 to rotate, so as to adjust the position of the expansion blade fixing rod 11, adjust the stretching angle of the expansion blade 13, and expand the minimally invasive channel. The ratchet paddle 19 is squeezed by the spring 20, and the ratchet paddle 19 limits the ratchet 15 so that the ratchet 15 can only rotate in one direction. When the operation is completed, the second adjusting handle 22 is rotated to drive the ratchet paddle 19 to rotate, and the ratchet paddle 19 squeezes the spring 20 to disengage the ratchet paddle 19 from the ratchet 15, and finally the first adjusting handle 18 is slowly rotated to reset the expansion blade 13.

[0038] Furthermore, the expansion blades 13 are stretched by the connecting rope 10 to facilitate the expansion of the minimally invasive channel by the expansion blades 13, and the expansion blades 13 are limited by the nut 12 to facilitate the fixation of expansion blades 13 of different lengths according to different wound depths, so as to facilitate the complete expansion of the wound during actual lumbar surgery, broaden the surgical field of view, facilitate the operation, improve the convenience and practicality of the expander, and improve the surgical efficiency.

[0039] By rotating the expander connecting plate 5 on the surface of the expander connecting shaft 4 and sliding the expander movable rod 8 inside the expander fixed rod 7, the expander blade fixed rod 11 can be adjusted according to different surgical positions, thereby improving the practicality and convenience of the expander.

[0040] Working principle: When using the expander, first use the expander fixing belt 2 and the buckle 3 to fix the minimally invasive channel expander body 1 on the waist of the patient who is preparing for lumbar surgery, then use a scalpel to make a small incision on the patient's waist, use the expander blade 13 to open the wound, then connect the expander connecting plate 5 to the expander connecting shaft 4, and insert the expander blade 13 into the interior of the through groove 14, turn the nut 12 to squeeze the expansion blade fixing rod 11 and the through groove 14, so as to fix the expansion blade 13. Different lengths of expansion blades 13 can be fixed according to different wound depths, so as to make the wound fully expand during the actual lumbar surgery, open the surgical field of view and facilitate the operation.

[0041] By sliding the expander movable rod 8 inside the expander fixed rod 7, the position of the expansion blade 13 can be adjusted according to the position of the wound, so as to expand the minimally invasive channel. By rotating the expander connecting plate 5 on the surface of the expander connecting shaft 4, the angle of the expander connecting plate can be adjusted according to the wound at different positions, so as to facilitate the connection between the expansion blade fixed rod 11 and the expansion blade 13.

[0042] The first rotating shaft 17 is driven to rotate by rotating the first adjusting handle 18, and the first rotating shaft 17 drives the reel 16 and the ratchet 15 to rotate, the reel 16 tightens the connecting rope 10, and the connecting rope 10 drives the expander fixing rod 7 and the expander movable rod 8 to rotate, and the expander movable rod 8 drives the expansion blade fixing rod 11, the nut 12 and the expansion blade 13 to rotate, so as to adjust the position of the expansion blade fixing rod 11, adjust the stretching angle of the expansion blade 13, and expand the minimally invasive channel. The ratchet paddle 19 is squeezed by the spring 20, and the ratchet paddle 19 limits the ratchet 15 so that the ratchet 15 can only rotate in one direction. When the operation is completed, the second adjusting handle 22 is rotated to drive the ratchet paddle 19 to rotate, and the ratchet paddle 19 squeezes the spring 20 to disengage the ratchet paddle 19 from the ratchet 15, and finally the first adjusting handle 18 is slowly rotated to reset the expansion blade 13.

[0043] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A minimally invasive channel dilator, characterized in that: It comprises a minimally invasive channel dilator body (1), the upper end of which is fixedly connected to two dilator connecting shafts (4), and a detachable dilator connecting plate (5) is rotatably sleeved on the surface of the dilator connecting shaft (4) on the left side; An expansion component, the expansion component is arranged on the surface of the expander connecting plate (5), the adjustment component comprises an expander rotating shaft (6), and the expander rotating shaft (6) is fixedly connected to the surface of the expander connecting plate (5); The surface of the expander rotating shaft (6) is rotatably connected to the expander fixing rod (7), the surface of the expander connecting plate (5) is fixedly connected to the box body (9), and an adjustment component is arranged inside the box body (9).

2. A minimally invasive channel dilator according to claim 1, characterized in that: The expansion assembly further comprises an expander movable rod (8), the expander movable rod (8) being slidably connected inside the expander fixed rod (7); Wherein, one end of the expander movable rod (8) away from the expander fixed rod (7) is fixedly connected to the expander blade fixed rod (11), the surface of the expander blade fixed rod (11) is provided with a thread, and the surface of the expander blade fixed rod (11) is provided with a through groove (14); The surface of the expansion blade fixing rod (11) is threadedly sleeved with a nut (12), and the inner wall of the through groove (14) is slidably connected with the expansion blade (13).

3. A minimally invasive channel dilator according to claim 1, characterized in that: The adjustment assembly comprises a first rotating shaft (17), the first rotating shaft (17) being rotatably connected to the interior of the box body (9); The ratchet (15) is fixedly connected to the surface of the first rotating shaft (17), the reel (16) is fixedly connected to the surface of the first rotating shaft (17), the upper end of the first rotating shaft (17) is fixedly connected to the first adjustment handle (18), the surface of the reel (16) is wound with a connecting rope (10), and the end of the connecting rope (10) away from the reel (16) is fixedly connected to the expander fixing rod (7); The box body (9) is rotatably connected to a second rotating shaft (21), a ratchet paddle (19) is fixedly connected to the surface of the second rotating shaft (21), a second adjustment handle (22) is fixedly connected to the upper end of the second rotating shaft (21), the ratchet paddle (19) is in contact with the ratchet (15), and a spring (20) is arranged inside the box body (9), with two ends of the spring (20) fixedly connected to the box body (9) and the ratchet paddle (19), respectively.

4. A minimally invasive channel dilator according to claim 1, characterized in that: There are two expansion components and two adjustment components, which are symmetrically arranged at two ends of the expander connecting plate (5).

5. The minimally invasive channel dilator according to claim 2, characterized in that: The two expansion blade fixing rods (11) are both truncated cone-shaped, and the lower ends of the two expansion blades (13) are both arc-shaped.

6. The minimally invasive channel dilator according to claim 1, characterized in that: Both ends of the minimally invasive channel dilator body (1) are fixedly connected to dilator fixing bands (2), and the ends of the two dilator fixing bands (2) away from the minimally invasive channel dilator body (1) are fixedly connected via buckles (3).

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