Needle knife for treating tenosynovitis

Abstract

The utility model discloses a needle knife for treating tenosynovitis, and belongs to the technical field of scalpels. The needle knife mainly comprises a fixing rod, a needle knife head is arranged at one end of the fixing rod, a handle assembly is arranged at the other end of the fixing rod, the needle knife head is of a flat structure bent downwards, two corners of the front end of the needle knife head are in arc transition, blades are arranged on two sides of the lower end face and the front end of the needle knife head, and the downward bending angle a of the needle knife head is 110-130 degrees. The length H1 of the needle knife head ranges from 5 mm to 7 mm, the width of the needle knife head ranges from 1 mm to 2 mm, and the diameter H2 of the fixing rod ranges from 1.2 mm to 2 mm. The acupotomy head is of the shovel-shaped structure, compared with a sickle-shaped structure, a sickle-shaped bent acupotomy head is removed, control is easier, the cutting edges on the two sides of the front end of the acupotomy head are in smooth transition, the situation that in the operation propelling process, the sharp end scratches tendons is avoided, and safety is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of scalpels, and particularly relates to a needle knife for treating tenosynovitis of the flexor tendon. Background Art

[0002] Stenosing tenosynovitis of the flexor tendon is commonly known as "snapping finger". It refers to a clinical symptomatic disease caused by repeated friction between the flexor tendon and the fibrous sheath tube of the flexor tendon at the metacarpophalangeal joint during the alternating activities of frequent finger bending and straightening, resulting in a chronic aseptic inflammatory reaction, local exudation, edema and fibrosis, thickening of the fibrous sheath wall of the flexor tendon, local thickening of the tendon, and obstruction of the tendon sliding at this site. In addition, because the finger flexion and extension movements of the patient are like pulling the trigger of a pistol and a snapping sound can occur, it is also called "trigger finger". Its clinical manifestations mainly include pain, tenderness in the palm and limited flexion and extension of the affected finger. When the condition of snapping finger is relatively serious, surgical treatment is required. The affected tendon sheath is incised through a needle knife to be released, so that the tendon can slide smoothly at this site.

[0003] The patent with the authorization announcement number of "CN203591306U" discloses a special needle knife for stenosing tenosynovitis surgery. The cutting blade head is in a shape of a return hook. A pulling blade and a pushing blade are respectively arranged on the inner side and the outer side of the cutting blade head. The pulling blade is in a straight-line structure, and the included angle between the edge line of the pulling blade and the axis of the needle knife rod is ensured to be an acute angle. This needle knife can quickly and accurately achieve the purpose of releasing the problem tendon sheath, with a high surgical success rate and effectively reducing the pain of patients.

[0004] The cutting blade head of the above needle knife is essentially in a sickle shape, and there are still the following problems in use: 1. Blades are arranged on both the inner and outer sides of the cutting blade head, which requires very high doctor skills. During the process of incising the tendon sheath, it is extremely easy to damage the tendon; 2. There is no handle. During the operation, it is necessary to directly hold the needle knife rod. The needle knife rod is very thin, resulting in difficult force control for the operator. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a needle knife for treating tenosynovitis. The needle knife head is in a shape of a spatula. Compared with the sickle shape, the sickle-shaped curved blade head is removed, which is easier to control. And the blades on both sides of the front end of the needle knife head adopt a smooth transition to avoid scratching the tendon at the tip during the operation process, with higher safety.

[0006] The described acupotomy for treating tenosynovitis includes a fixing rod. One end of the fixing rod is provided with an acupotomy head, and the other end of the fixing rod is provided with a handle assembly. The acupotomy head has a flat structure that bends downward, and the two corners at the front end of the acupotomy head are transitioned with arcs. Both sides and the front end of the lower end surface of the acupotomy head are provided with blades. The downward bending angle a of the acupotomy head is 110 - 130°, the length H1 of the acupotomy head is 5 - 7 mm, the width of the acupotomy head is 1 - 2 mm, and the diameter H2 of the fixing rod is 1.2 - 2 mm.

[0007] Preferably, the handle assembly is formed by bending the fixing rod, and the end of the handle assembly is fixedly connected to the fixing rod 1.

[0008] Preferably, upper and lower sliding grooves are respectively formed on the outer side walls on both sides of the fixing rod along its axial direction. The upper sliding groove is a smooth structure, and the lower sliding groove is provided with anti-slip ridges. The handle assembly is slidably arranged on the fixing rod, and a limiting disc for limiting the sliding of the handle assembly is provided at the end of the fixing rod.

[0009] Preferably, the handle assembly includes a movable handle. The movable handle is slidably connected to the fixing rod. A limiting seat is fixedly connected to the bottom of the movable handle. A fixed handle is rotatably connected to the limiting seat. A clamping mechanism for fixing the position of the fixing rod is arranged in the limiting seat, and the fixed handle can drive the clamping mechanism to closely cooperate with the lower sliding groove.

[0010] Preferably, the movable handle includes a handle body. Fixing grooves are respectively formed on both sides of the handle body. Anti-slip patterns are provided on the fixing grooves. A through hole that matches the outer side wall of the fixing rod is formed in the width direction of the handle body. A limiting slider that matches the upper sliding groove is fixedly connected to the upper part of the through hole. An installation groove is provided at the bottom of the handle body, and the limiting seat is fixedly installed in the installation groove.

[0011] Preferably, the limiting seat includes a fixed sleeve. An inner hole that slidably matches the outer side wall of the fixing rod is formed on the fixed sleeve. An anti-slip layer with a disconnected bottom is provided on the inner side wall of the inner hole. An activity hole for the sliding of the clamping mechanism is formed at the bottom of the inner hole. A rotation hole for installing the fixed handle is formed at the bottom of the fixed sleeve.

[0012] Preferably, the clamping mechanism includes an arc-shaped fixing plate. The longitudinal section on the upper side of the arc-shaped fixing plate has an arc structure, and the arc structure matches the lower sliding groove. Fixed columns that slidably match the activity holes are respectively fixedly connected to both sides of the bottom of the arc-shaped fixing plate. A spring is fixedly connected between the fixed column and the inner end surface of the activity hole. A fixed block is arranged between the two fixed columns, and the fixed block is fixedly connected to the bottom of the arc-shaped fixing plate.

[0013] Preferably, anti-slip protrusions are provided on the arc structure of the arc-shaped fixing plate.

[0014] Preferably, the fixed handle includes an extrusion member which is in a cylindrical structure. A rotating shaft matched with the rotating hole is fixedly connected to a position of the extrusion member deviating from the center of the circle, and a handle body is fixedly connected to the outer side wall of the extrusion member.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. The needle knife head has a spatula-like structure, and the thickness of the needle knife head gradually thins from the back to the front. This structure makes the wound smaller, causes less damage to human tissues, and is not easy to cause infection. Moreover, the blade at the front end of the needle knife head is a flat blade, and the flat blade is convenient to penetrate vertically into the subcutaneous tissue at a 90-degree angle with the palm surface. During the operation, it is easier to extend distally and find the affected area of the snapping sound. The blades on both sides of the spatula-like needle knife head are convenient for cutting the tendon sheath downward and proximally. At the same time, the blades on both sides of the front end of the needle knife head adopt a smooth transition to avoid scratching the tendon during the operation process, and the safety is higher.

[0017] 2. The handle assembly is slidably matched with the fixed rod and fixed by a clamping mechanism, which is convenient for different operators to adjust the position of the handle assembly according to their own operating habits, greatly improving the flexibility of the needle knife. 3. The arc-shaped fixing plate is provided with anti-slip protrusions on its arc structure. The anti-slip protrusions increase the friction with the lower chute, avoiding the displacement of the clamping mechanism. At the same time, anti-slip ridges are added in the lower chute, and the anti-slip ridges further play a role in increasing friction and anti-slip, making the clamping mechanism more firmly fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front structural schematic diagram of Embodiment 1;

[0019] Figure 2 It is a side structural schematic diagram of Embodiment 1;

[0020] Figure 3 It is a bottom structural schematic diagram of Embodiment 1;

[0021] Figure 4 It is a front structural schematic diagram of Embodiment 2;

[0022] Figure 5 It is a bottom structural schematic diagram of Embodiment 2;

[0023] Figure 6 It is a partial disassembled schematic diagram of Embodiment 2;

[0024] Figure 7 It is a structural schematic diagram of the movable handle;

[0025] Figure 8 It is for Figure 7 the sectional view taken along the line A-A in

[0026] Figure 9 It is a structural schematic diagram of the limit seat;

[0027] Figure 10 is a schematic structural diagram of a clamping mechanism;

[0028] Figure 11 is a schematic structural diagram of a fixed handle.

[0029] In the figure, 1 is a fixed rod; 101 is an upper sliding groove; 102 is a limit disc; 103 is a lower sliding groove; 104 is an anti-slip convex pattern; 2 is a needle knife head; 201 is a blade; 3 is a handle assembly; 31 is a movable handle; 311 is a handle body; 312 is a fixed groove; 313 is a limit slider; 314 is a through hole; 315 is a mounting groove; 32 is a limit seat; 321 is a fixed sleeve; 322 is an anti-slip layer; 323 is a movable hole; 324 is a rotating hole; 33 is a clamping mechanism; 331 is an arc-shaped fixing plate; 332 is an anti-slip protrusion; 333 is a fixing column; 334 is a spring; 335 is a fixing block; 34 is a fixed handle; 341 is an extrusion part; 342 is a rotating shaft; 343 is a handle body. Specific embodiments

[0030] The following further describes the present utility model with reference to the accompanying drawings:

[0031] In the paragraphs of detailed description, the orientation nouns involved are only for the convenience of those skilled in the art to understand the technical solutions described in this application according to the visual orientation shown in the accompanying drawings. Unless otherwise clearly specified and limited, terms such as "set", "installed", "connected", etc. should be understood in a broad sense. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0032] Embodiment 1:

[0033] As Figures 1 to 3 shown, a needle knife for treating tenosynovitis includes a fixed rod 1. The diameter H2 of the fixed rod 1 is 1.2 - 2 mm, and the diameter H2 of the fixed rod 1 is preferably 1.5 mm. One end of the fixed rod 1 is provided with a needle knife head 2, and the other end of the fixed rod 1 is provided with a handle assembly 3. The needle knife head 2 has a flat structure that bends downward, and the two front corners of the front end of the needle knife head 2 are transitioned by arcs, that is, the needle knife head 2 has a spatula-like structure. The width direction of the needle knife head 2 is perpendicular to the height direction of the handle assembly 3, which is convenient for operation and use. Both sides and the front end of the lower end surface of the needle knife head 2 are provided with blades 201. The downward bending angle a of the needle knife head 2 is 110 - 130°, the length H1 of the needle knife head 2 is 5 - 7 mm, and the width of the needle knife head 2 is 1 - 2 mm. During processing, the thickness of the needle knife head 2 gradually becomes thinner from back to front. This structure makes the wound smaller, is not easy to cause infection, and the spatula-like needle knife head 2 is easier to control compared with the sickle-like structure. The sickle-like curved knife head is removed, and the safety is higher, avoiding damage to the tendon during the operation when searching for the tendon sheath.

[0034] In this embodiment, the handle assembly 3 is formed by bending the fixing rod 1 upward, and the end of the handle assembly 3 is fixedly connected to the fixing rod 1l. The handle assembly 3 plays a supporting role. According to needs, the fixing rod 1 can be processed into various length specifications, and at the same time, the width of the needle knife head 2 can also be processed into various width specifications.

[0035] Embodiment Two:

[0036] As Figure 4 and Figure 5 shown, upper sliding grooves 101 and lower sliding grooves 103 are respectively formed on the outer side walls on the upper and lower sides of the fixing rod 1 along its axial direction. The upper sliding groove 101 is a smooth structure, and anti-slip ridges 104 are provided on the lower sliding groove 103. The handle assembly 3 is slidably arranged on the fixing rod 1, and a limit disc 102 for sliding limit of the handle assembly 3 is provided at the end of the fixing rod 1. Among them, the upper sliding groove 101 is used to prevent the handle assembly 3 from rotating relative to the fixing rod 1, and the lower sliding groove 103 is used for position adjustment of the handle assembly 3, so that the position of the handle assembly 3 can be flexibly adjusted.

[0037] As Figures 6 to 8 shown, the handle assembly 3 includes a movable handle 31. The movable handle 31 is slidably connected to the fixing rod 1. According to the operating habit, the position of the movable handle 31 on the fixing rod 1 can be adjusted arbitrarily. A limit seat 32 is fixedly connected to the bottom of the movable handle 31, and a fixed handle 34 is rotatably connected to the limit seat 32. A clamping mechanism 33 for fixing the position of the fixing rod 1 is arranged in the limit seat 32. Rotating the fixed handle 34 can drive the clamping mechanism 33 to be closely matched with the lower sliding groove 103, that is, after determining the position of the movable handle 31, rotating the fixed handle 34, the fixed handle 34 squeezes the clamping mechanism 33 towards the fixing rod 1 side, so that the clamping mechanism 33 is fixedly connected to the fixing rod 1.

[0038] Specifically, as Figure 7 and Figure 8 shown, the movable handle 31 includes a handle body 311. Fixing grooves 312 are respectively formed on the front and rear sides of the handle body 311. Anti-slip patterns are provided on the fixing grooves 312. The fixing grooves 312 are used for the operator to tightly hold the handle body 311. Compared with the prior art, the operator needs to hold the fixing rod 1 to fix the needle knife. The handle body 311 increases the force-bearing area when the needle knife is fixed, is more convenient to use, and at the same time is convenient for the operator to apply force downward, and the force is easy to master.

[0039] A through hole 314 that matches the outer wall of the fixed rod 1 is provided in the width direction of the handle body 311. A limit slider 313 that matches the upper sliding groove 101 is fixedly connected to the upper part of the through hole 314. The limit slider 313 can prevent relative rotation between the handle body 311 and the fixed rod 1. An installation groove 315 is provided at the bottom of the handle body 311, and the limit seat 32 is fixedly installed in the installation groove 315.

[0040] As Figure 9 shown, the limit seat 32 includes a fixed sleeve 321. An inner hole that slidably matches the outer wall of the fixed rod 1 is provided on the fixed sleeve 321. An anti-slip layer 322 with a disconnected bottom is provided on the inner side wall of the inner hole. The bottom of the anti-slip layer 322 is disconnected, which does not hinder the installation of the fixed handle 34 and the clamping mechanism 33. At the same time, the anti-slip layer 322 increases the friction between the outer wall of the fixed rod 1, preventing the movable handle 31 from sliding freely with the limit seat 32. An activity hole 323 for the sliding of the clamping mechanism 33 is provided at the bottom of the inner hole, and a rotation hole 324 for installing the fixed handle 34 is provided at the bottom of the fixed sleeve 321.

[0041] As Figure 10 shown, the clamping mechanism 33 includes an arc-shaped fixing plate 331. The longitudinal section on the upper side of the arc-shaped fixing plate 331 is in an arc structure, and the arc structure matches the lower sliding groove 103. Anti-slip protrusions 332 are provided on the arc structure of the arc-shaped fixing plate 331. The anti-slip protrusions 332 further increase the friction between the lower sliding groove 103, making the clamping mechanism 33 more firmly and reliably fixed. The arc-shaped fixing plate 331 is made of rubber. Fixed columns 333 that slidably match the activity hole 323 are respectively fixedly connected to both sides of the bottom of the arc-shaped fixing plate 331. A spring 334 is fixedly connected between the fixed column 333 and the inner end surface of the activity hole 323. The spring 334 is a tension spring. A fixed block 335 is provided between the two fixed columns 333, and the fixed block 335 is fixedly connected to the bottom of the arc-shaped fixing plate 331.

[0042] As Figure 11 shown, the fixed handle 34 includes a pressing member 341. The pressing member 341 has a cylindrical structure. A rotating shaft 342 that matches the rotation hole 324 is fixedly connected to a position deviating from the center of the circle of the pressing member 341. The side wall of the pressing member 341 farthest from the rotating shaft 342 is the locking side, and the other side is the activity side. A handle body 343 is fixedly connected to the outer side wall of the pressing member 341. The handle body 343 is preferably arranged between the locking side and the activity side. The rest is the same as in the first embodiment.

[0043] In this embodiment, when the position of the movable handle 31 needs to be adjusted, the handle body 343 is bent downward to rotate the pressing member 341. At this time, the handle body 343 is in a vertical state, and the locking side does not abut against the clamping mechanism 33. Under the reset action of the spring 334, there is a gap between the clamping mechanism 33 and the lower chute 103 on the fixed rod 1, and the handle assembly 3 can slide freely on the fixed rod 1.

[0044] After the operator determines the position of the handle assembly 3 as needed, the handle body 343 is bent upward, and the handle body 343 drives the pressing member 341 to rotate, so that the locking side presses the fixed block 335. Under the limiting action of the fixed column 333 and the movable hole 323, the fixed block 335 moves upward, so that the anti-slip protrusion 332 of the arc-shaped fixing plate 331 is in close fit with the lower chute 103. The anti-slip protrusion 332 increases the friction between the arc-shaped fixing plate 331 and the lower chute 103 to prevent it from sliding. At the same time, the anti-slip ridges 104 in the lower chute 103 further play a role in increasing friction and preventing slipping. At this time, the fixed rod 1 and the handle assembly 3 are fixed together.

[0045] By adjusting the position of the handle assembly 3, the needle knife can adapt to the operating habits of different operators and is more flexible. At the same time, the cutting edge 201 at the front end of the spatula-shaped needle knife head 2 is a flat edge, and the flat edge is convenient for piercing perpendicularly into the subcutaneous tissue at a 90-degree angle with the palm surface. In this way, during the operation, it is easier to extend distally and accurately locate the affected area of the snapping. The cutting edges on both sides of the spatula-shaped needle knife head 2 are convenient for cutting the tendon sheath downward and proximally; at the same time, the cutting edges 201 on both sides of the front end of the needle knife head 2 adopt a smooth transition to avoid scratching the tendon during the advancing operation, and the safety is higher.

[0046] Finally, although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A small needle knife for treating tenosynovitis, comprising a fixing rod (1), a small needle knife head (2) is provided at one end of the fixing rod (1), and a handle assembly (3) is provided at the other end of the fixing rod (1), and the characteristics are as follows: The needle cutter head (2) is a flat structure that is bent downward, and two corners at the front end of the needle cutter head (2) are circularly transitioned. Both sides of the lower end surface and the front end of the needle cutter head (2) are provided with blades (201). The downward bending angle a of the needle cutter head (2) is 110-130°. The length H1 of the needle cutter head (2) is 5-7 mm, the width of the needle cutter head (2) is 1-2 mm, and the diameter H2 of the fixing rod (1) is 1.2-2 mm.

2. The needle knife for treating tenosynovitis according to claim 1, wherein: The handle assembly (3) is formed by bending the fixing rod (1), and the end of the handle assembly (3) is fixedly connected to the fixing rod 1.

3. The needle knife for treating tenosynovitis according to claim 1, wherein: The outer side walls on the upper and lower sides of the fixed rod (1) are respectively provided with an upper slide groove (101) and a lower slide groove (103) along the axial direction thereof; the upper slide groove (101) is a smooth structure; the lower slide groove (103) is provided with an anti-slip convex pattern (104); the handle assembly (3) is slidably arranged on the fixed rod (1); and a limit plate (102) for slidingly limiting the handle assembly (3) is provided at the end of the fixed rod (1).

4. The needle knife for treating tenosynovitis according to claim 3, wherein: The handle assembly (3) comprises a movable handle (31), the movable handle (31) being slidably connected to the fixed rod (1), the bottom of the movable handle (31) being fixedly connected to a limit seat (32), the limit seat (32) being rotatably connected to a fixed handle (34), the limit seat (32) being provided with a clamping mechanism (33) for fixing the position of the fixed rod (1), and the fixed handle (34) being capable of driving the clamping mechanism (33) to closely cooperate with the lower sliding groove (103).

5. The needle knife for treating tenosynovitis according to claim 4, wherein: The movable handle (31) comprises a handle body (311), fixing grooves (312) are respectively provided on both sides of the handle body (311), and anti-slip grooves are provided on the fixing grooves (312). A through hole (314) matching with the outer wall of the fixing rod (1) is provided in the width direction of the handle body (311), and a limiting slider (313) matching with the upper slide groove (101) is fixedly connected to the upper part of the through hole (314). A mounting groove (315) is provided at the bottom of the handle body (311), and the limiting seat (32) is fixedly installed in the mounting groove (315).

6. The tenotomy needle for treating tenosynovitis according to claim 4, wherein: The limit seat (32) comprises a fixing sleeve (321), the fixing sleeve (321) is provided with an inner hole which is slidably matched with the outer wall of the fixing rod (1), the inner wall of the inner hole is provided with an anti-slip layer (322) which is disconnected at the bottom, the bottom of the inner hole is provided with a movable hole (323) for sliding the clamping mechanism (33), and the bottom of the fixing sleeve (321) is provided with a rotating hole (324) for installing the fixing handle (34).

7. The acupotomy for treating tenosynovitis according to claim 6, wherein: The clamping mechanism (33) comprises an arc-shaped fixing plate (331), the longitudinal section of the upper side of the arc-shaped fixing plate (331) presents an arc structure, and the arc structure cooperates with the lower sliding groove (103), and the bottom sides of the arc-shaped fixing plate (331) are respectively fixedly connected with fixing columns (333) that slidably cooperate with the movable hole (323), and a spring (334) is fixedly connected between the fixing column (333) and the inner end surface of the movable hole (323), and a fixing block (335) is provided between the two fixing columns (333), and the fixing block (335) is fixedly connected to the bottom of the arc-shaped fixing plate (331).

8. The needle knife for treating tenosynovitis according to claim 7, wherein: The arc structure of the arc-shaped fixing plate (331) is provided with anti-slip protrusions (332).

9. The needle knife for treating tenosynovitis according to claim 7, wherein: The fixed handle (34) includes an extrusion member (341). The extrusion member (341) has a cylindrical structure. A rotating shaft (342) that cooperates with the rotating hole (324) is fixedly connected to a position of the extrusion member (341) deviating from the center of the circle. A handle body (343) is fixedly connected to the outer side wall of the extrusion member (341).

Images