Scalpel for tenosynovitis

Abstract

The scalpel comprises a stretching-in distraction body, a scalpel rod axially penetrates through the interior of the stretching-in distraction body, a distraction inner groove is formed in the first end of the stretching-in distraction body, a cutting edge part is arranged at one end of the scalpel rod, the cutting edge part is located in the distraction inner groove, and the cutting edge part is located at the other end of the stretching-in distraction body. The other end of the cutter bar is provided with a handheld operation part, the cutting edge part can be made to reach the tenosynovitis position from the position away from the tenosynovitis position along subcutaneous tissue together by arranging the stretching-in opening main body, and the tenosynovitis tissue can be cut by rotating and stretching out and drawing back the cutter bar and the cutting edge part. The whole cutting process is carried out in the expanded inner groove, and other tissues cannot be damaged. The tenosynovitis scalpel can solve the problem that an existing tenosynovitis scalpel cannot smoothly penetrate through and extend to the tenosynovitis position in the subcutaneous tissue of the hand.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, in particular to a scalpel used for tenosynovitis. Background Art

[0002] During the surgery for tenosynovitis, the scalpel needs to be inserted under the skin of the hand to the location of the tenosynovitis for incision and release. Due to the dense subcutaneous tissue of the hand and the frequent adhesion and scar tissue formation in the affected area, the insertion of the scalpel is very difficult. Although the existing sheath can be inserted under the skin, the channel it forms is relatively small and cannot meet the requirements for the insertion of the knife. Summary of the invention

[0003] The invention provides a surgical knife for tenosynovitis, which can solve the problem that the existing surgical knife for tenosynovitis cannot smoothly pass through the subcutaneous tissue of the hand and extend to the position of the tenosynovitis.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a surgical knife for tenosynovitis, comprising a main body extending into the expansion body, a knife rod axially passing through the interior of the main body extending into the expansion body, a first end of the main body extending into the expansion body being provided with an expansion inner groove, one end of the knife rod being provided with a cutting blade portion, the cutting blade portion being located inside the expansion inner groove, and a hand-held operating portion being installed at the other end of the knife rod, by arranging the main body extending into the expansion body, the cutting blade portion can be moved from a position away from the tenosynovitis along the subcutaneous tissue to the position of the tenosynovitis, and the tissue of the tenosynovitis can be cut by rotating and extending the knife rod and the cutting blade portion, and the entire cutting process is carried out in the expansion inner groove without damaging other tissues.

[0005] Preferably, the extending and expanding body is an elongated strip structure, and its cross section is circular, elliptical or semicircular, which is conducive to the movement of the extending and expanding body in the subcutaneous tissue.

[0006] The cutting blade portion comprises a hook-shaped portion and a blade located inside the hook-shaped portion. The hook-shaped portion and the blade can form an effect of hooking out tissue for pulling and cutting, thereby improving cutting efficiency.

[0007] Preferably, the inner expansion groove is an arc groove, which is convenient for manufacturing and is also conducive to expanding the subcutaneous tissue.

[0008] Preferably, a handle is provided at the second end of the extension body, so as to facilitate operation and fixation of the extension body.

[0009] Preferably, the side wall of the area where the sliding knife rod extends into the expansion body is fixedly connected with a limiting ring, and the side wall of the limiting ring is fixedly connected with a delivery tube, and the other end of the delivery tube is connected to an elastic airbag, and the elastic airbag is located at the holding end of the handle.

[0010] Preferably, a handle is rotatably connected to the side wall of the handle, the handle output shaft is fixedly connected to the worm in the worm gear, the worm gear is rotatably connected to the handle, the center of the worm wheel in the worm gear is fixedly connected to the expansion plate, and the expansion plate is rotatably connected to the side wall of the handle; The worm gear and the expansion plate form a matching component, which is located at the other end of the handle side wall, and the worm in the matching component is connected to the worm in the worm gear.

[0011] Preferably, the handle is arranged perpendicularly to the main body inserted into the opening, leaving sufficient operating space for the tail of the main body inserted into the opening, so as to facilitate flexible operation of the knife rod.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The structure is simple. By setting the extension body, the cutting blade can be moved from a position away from the tenosynovitis along the subcutaneous tissue to the position of the tenosynovitis. By rotating and retracting the knife bar and the cutting blade, the tissue of the tenosynovitis can be cut. The entire cutting process is carried out in the inner groove of the extension, and other tissues will not be damaged. The problem that the existing tenosynovitis scalpel cannot smoothly pass through the subcutaneous tissue of the hand and extend to the position of the tenosynovitis can be solved. The two sets of expansion plates can be expanded to make the handle expand into a cross-shaped structure, so that the expansion plate can be placed on the surface of the finger to prevent the handle from slipping from the fingertips. The limiting ring expands and then clamps the knife bar inside to prevent the knife bar from moving inside the extension body when the knife bar moves in the extension body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the main structural diagram of the present invention; Figure 2 It is a front cross-sectional structural diagram of the present invention extending into the open main body; Figure 3 It is a side cross-sectional structural diagram of the main body of the present invention; Figure 4 for Figure 3 A magnified structural diagram; Figure 5 This is a schematic diagram of the operation of extending the expansion body of the present invention into the subcutaneous tissue; Figure 6 It is a cross-sectional schematic diagram of the extension and expansion body of the present invention extending into the subcutaneous tissue; Figure 7 Another structural schematic diagram of the present invention; Figure 8 The worm gear and the expansion plate of the present invention; Fig. 9 This is the connection relationship between the restriction ring and the delivery pipe of the present invention.

[0014] Reference numerals: 1. Extend into the expansion body, 2. Hand-held operating part, 3. Handle, 4. Expand the inner groove, 5. Cutting blade part, 6. Endoscope tube, 7. Knife rod, 8. Hook-shaped part, 9. Blade, 10. Limiting ring, 11. Delivery tube, 12. Elastic airbag, 13. Handle, 14. Worm gear, 15. Expanding plate, 16. Matching components. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0016] The present invention aims to solve the problem that the existing tenosynovitis surgical knife cannot smoothly pass through the subcutaneous tissue of the hand and extend to the position of the tenosynovitis. Figure 1-4 As shown, the following technical solution is provided: a surgical knife for tenosynovitis, comprising an insert-opening main body 1, wherein a knife rod 7 is axially provided inside the insert-opening main body 1, an inner extension groove 4 is provided at the first end of the insert-opening main body 1, a cutting blade 5 is provided at one end of the knife rod 7, and the cutting blade 5 is located inside the inner extension groove 4, and a hand-held operating part 2 is installed at the other end of the knife rod 7. By arranging the insert-opening main body 1, the cutting blade 5 can be moved from a position away from the tenosynovitis along the subcutaneous tissue to the position of the tenosynovitis, and the tissue of the tenosynovitis can be cut by rotating and extending the knife rod 7 and the cutting blade 5, and the entire cutting process is carried out in the inner extension groove 4 without damaging other tissues.

[0017] Specifically, the location of tenosynovitis is generally at the wrist, which is not suitable for surgery. The wound left after surgery is likely to affect the patient's subsequent wrist activities, such as Figure 5-6 As shown, after using the scalpel in this embodiment, an incision can be made on the finger near the location of the tenosynovitis, such as the thumb or index finger, and then the extension body 1 is inserted from the incision into the subcutaneous tissue and moved to the location of the tenosynovitis. During this movement, the side wall of the inner groove 4 will stretch the subcutaneous tissue. When the tissue position that needs to be cut is reached, the cutting blade 5 can directly cut the tissue. During the cutting process, the knife rod 7 can move and rotate back and forth in the internal through hole of the extension body 1. The handheld operating part 2 can be operated during the entire surgical process. The handheld operating part 2 can adopt a cylindrical structure, which is convenient for two or three fingers to pinch the handheld operating part 2 for operation. Of course, the handheld operating part 2 can adopt other shapes, such as a polygonal structure or a flat structure, and the shape shown in the accompanying drawings is not the standard.

[0018] When the cutting blade 5 is cutting the tissue, an endoscope tube 6 can be inserted into the skin to observe the surgical site of the tenosynovitis, which is convenient for the doctor to perform the operation. The position and entry method of the endoscope tube 6 can be flexibly selected. The endoscope tube 6 adopts a conventional endoscope tube 6, which can be a relatively small model. It is preferred to use an endoscope tube 6 with a lighting component. This is all existing technology, and its specific structure will not be repeated here. The endoscope tube 6 is connected to an external visual instrument, and the doctor can observe the visual instrument while operating the handheld operating part 2 The entire extending and expanding main body 1 can be made of stainless steel or high-strength medical plastic, which is convenient for disinfection.

[0019] The knife rod 7 and the hand-held operating part 2 are connected by a threaded connection. During assembly, the knife rod 7 and the hand-held operating part 2 can be disassembled first, and the knife rod 7 can be passed through the extended-opening main body 1 and then connected to the extended-opening main body 1. A through hole slightly larger than the diameter of the knife rod 7 is set through the middle of the extended-opening main body 1.

[0020] In this embodiment, the extended expansion body 1 is a long strip structure, and its cross-section is circular, elliptical or semicircular, which is conducive to the movement of the extended expansion body 1 in the subcutaneous tissue, wherein the length of the extended expansion body 1 can be customized according to needs, and the shape of the extended expansion body 1 also matches the shape of the expansion inner groove 4, and the side wall of the expansion inner groove 4 is also a part of the extended expansion body 1, wherein the expansion inner groove 4 can be an arc groove, which is convenient for manufacturing and is also conducive to expanding the subcutaneous tissue.

[0021] In this embodiment, if Figure 4 As shown, the cutting blade portion 5 includes a hook-shaped portion 8 and a blade 9 located inside the hook-shaped portion 8. The hook-shaped portion 8 and the blade 9 can form an effect of hooking out tissue for pulling and cutting, thereby improving the cutting efficiency. For example, during surgery, the tissue that needs to be cut (such as tendons, nerves, etc.) is found, and then the tissue is hooked with the hook-shaped portion 8, and the tissue can be cut by pulling it back with force. In this way, the blade 9 will only cut the hooked tissue and will not cause damage to other subcutaneous tissues. The operation is simple and precise cutting can be achieved.

[0022] In this embodiment, if Figure 1 and 5As shown, in order to operate the inserted and opened main body 1, the second end of the inserted and opened main body 1 is provided with a handle 3, which can facilitate the operation and fixation of the inserted and opened main body 1. The handle 3 can be an integrated structure with the inserted and opened main body 1, or it can be connected in an assembled manner. The handle 3 and the inserted and opened main body 1 can be fixedly connected, or they can be movably connected, such as being connected by rotation. When in use, the two can be positioned at a certain angle. When not in use, the inserted and opened main body 1 and the handle 3 can be folded together for easy disinfection and storage. In order to facilitate holding the handle 3, a spindle-shaped grip portion can be provided at the tail end of the handle 3.

[0023] like Figure 1 As shown, the handle 3 is arranged perpendicularly to the main body 1 inserted into the opening, leaving enough operating space for the tail of the main body 1 inserted into the opening, so as to facilitate flexible operation of the knife rod 7.

[0024] In this embodiment, if Figure 7 and 8 Figure and Fig. 9 As shown, the side wall of the area where the sliding knife rod 7 is inserted into the expansion body 1 is fixedly connected to a limiting ring 10, and the side wall of the limiting ring 10 is fixedly connected to a delivery tube 11, and the other end of the delivery tube 11 is connected to an elastic air bag 12, and the elastic air bag 12 is located at the holding end of the handle 3; when pushing the expansion body 1 to move, the user's hand is held on the side wall of the handle 3, and then the hand is squeezed and contacted with the elastic air bag 12 on the handle 3, so that the elastic air bag 12 drives the air inside to enter the interior of the limiting ring 10 through the delivery tube 11, so that the limiting ring 10 expands and then the limiting ring 10 clamps the knife rod 7 inside, so as to prevent the knife rod 7 from moving inside the expansion body 1 when the expansion body 1 is inserted into the expansion body 1.

[0025] A handle 13 is rotatably connected to the side wall of the handle 3, and the output shaft of the handle 13 is fixedly connected to the worm in the worm gear 14, the worm gear 14 is rotatably connected to the handle 3, the center of the worm wheel in the worm gear 14 is fixedly connected to the expansion plate 15, and the expansion plate 15 is rotatably connected to the side wall of the handle 3; twisting the handle 3 drives the two groups of worm gears 14 and the expansion plate 15 to operate, and the two groups of expansion plates 15 can be expanded to make the handle 3 expand into a cross-shaped structure, so that the expansion plate 15 can be placed on the surface of the finger to prevent the handle 3 from slipping from the fingertips.

[0026] Specifically, the worm gear 14 and the unfolding plate 15 form a matching assembly 16 , which is located at the other end of the side wall of the handle 3 , and the worm in the matching assembly 16 is integrally connected with the worm in the worm gear 14 .

[0027] Therefore, using the surgical knife in this embodiment to perform tendon sheath surgery can solve the problem that the existing tenosynovitis surgical knife cannot smoothly pass through the subcutaneous tissue of the hand and extend to the location of the tenosynovitis.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, in the present invention, descriptions such as "primary", "secondary", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "primary" or "secondary" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A surgical knife for tenosynovitis, characterized in that: include: The knife rod (7) is inserted into the expansion body (1), and the interior of the expansion body (1) is axially penetrated by the knife rod (7). The first end of the expansion body (1) is provided with an expansion inner groove (4). One end of the knife rod (7) is provided with a cutting blade (5), and the cutting blade (5) is located inside the expansion inner groove (4). The other end of the knife rod (7) is mounted with a handheld operating part (2).

2. The surgical knife for tenosynovitis according to claim 1, characterized in that: The extending and opening main body (1) is a long strip structure, and its cross section is circular, elliptical or semicircular.

3. The surgical knife for tenosynovitis according to claim 1, characterized in that: The cutting blade portion (5) comprises a hook-shaped portion (8) and a blade (9) located inside the hook-shaped portion (8).

4. The surgical knife for tenosynovitis according to claim 1, characterized in that: The expanded inner groove (4) is a circular arc groove.

5. The surgical knife for tenosynovitis according to any one of claims 1 to 4, characterized in that: The second end extending into the expansion body (1) is provided with a handle (3).

6. The surgical knife for tenosynovitis according to claim 5, characterized in that: The handle (3) is arranged perpendicularly to the main body (1) extending into the opening.

7. The surgical knife for tenosynovitis according to claim 1, characterized in that: A limiting ring (10) is fixedly connected to the side wall of the area of ​​the sliding knife rod (7) extending into the expansion body (1), and a delivery tube (11) is fixedly connected to the side wall of the limiting ring (10). The other end of the delivery tube (11) is connected to an elastic airbag (12), and the elastic airbag (12) is located at the holding end of the handle (3).

8. The surgical knife for tenosynovitis according to claim 7, characterized in that: A handle (13) is rotatably connected to the side wall of the handle (3); an output shaft of the handle (13) is fixedly connected to a worm in a worm gear (14); the worm gear (14) is rotatably connected to the inside of the handle (3); the center of the worm wheel in the worm gear (14) is fixedly connected to an expansion plate (15); and the expansion plate (15) is rotatably connected to the side wall of the handle (3); The worm gear (14) and the unfolding plate (15) form a matching component (16). The matching component (16) is located at the other end of the side wall of the handle (3), and the worm in the matching component (16) is integrally connected with the worm in the worm gear (14).

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