A needle knife for treating tenosynovitis

Abstract

The present invention discloses a needle knife for treating tenosynovitis, comprising: a needle body, a needle handle, a cutter, a supporting spring and a pusher; the needle handle is fixedly arranged at the tail end of the needle body, the cutter is slidably placed in the inner cavity of the needle body, the end head is fixedly connected to the supporting spring, the tail end is fixedly connected to the pusher, the pusher is slidably connected to the needle handle, and the supporting spring is fixedly connected to the inner cavity of the head end of the needle body; the present invention changes the form of the traditional needle knife and converts it into two parts, a needle body and a cutter; the cutter can be pushed forward under the action of the pusher, and during the pushing process, its end head will be propped up upward due to the action of the supporting spring, thereby forming an arc-shaped curved knife, which can pull the entire device to cut the tendon sheath, and the tangent line of the blade tip of the arc curved knife and the axis of the needle body form an angle of 60 degrees, so that the blade tip forms a form of always hooking backwards, compared with the smooth needle knife in the prior art, during the tendon sheath cutting process, the tendon sheath will not slip out of the blade tip, thereby improving the success rate of one-time cutting of the tendon sheath.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a needle knife for treating tenosynovitis. Background Art

[0002] The tendon sheath is a double-layered, sleeve-like, closed synovial tube that wraps around the tendon. It is a synovial sheath that protects the tendon. It surrounds the tendon in two layers, with a cavity between the two layers, the synovial cavity, which contains synovial fluid of the tendon sheath. The inner layer is closely attached to the tendon, and the outer layer is lined inside the tendon fiber sheath. Together with the bone surface, they have the function of fixing, protecting and lubricating the tendon and protecting it from friction or compression. Excessive friction between the tendon and the tendon sheath can cause damaging inflammation of the tendon and tendon sheath, leading to tenosynovitis, which manifests as local pain, tenderness, and limited joint movement.

[0003] There are three main physical treatment options for tenosynovitis: first, local immobilization, where the affected part can be fixed with a splint or plaster to restrict movement; second, topical medications, including Voltaren; third, physical therapy and hot compresses, which can promote the absorption of inflammation. Glucocorticoids and local anesthetics can also be injected into the tendon sheath for closed treatment. If closed treatment is still ineffective, patients can choose acupuncture knife treatment, which can be used to loosen the adhesion between the tendon and the tendon sheath, or the hyperplastic tendon sheath can be completely cut open to reduce pressure, which can achieve complete cure.

[0004] Acupuncture knife treatment naturally involves the necessary acupuncture knife instruments. Most current acupuncture knives use a flat blade design, which can achieve ultrasonic visualization. However, due to its smooth needle body structure, it cannot completely cut the tendon sheath in one go, which brings great inconvenience to clinical treatment. Repeated insertion of the acupuncture knife also increases the pain of the patient.

[0005] Therefore, there is a need for a needle knife with a barbed blade to achieve one-time cutting of the tendon sheath. Summary of the invention

[0006] In order to solve the above technical problems, the present invention designs a needle knife for treating tenosynovitis. A freely controllable arc blade edge is arranged on the straight needle body to realize free switching of the needle and the blade, which is convenient for entering the patient's affected part and can also be cut in one time.

[0007] In order to achieve the above technical effects, the present invention is implemented through the following technical solutions: a needle knife for treating tenosynovitis, comprising: a needle body, a needle handle, a cutter, a supporting spring, and a pusher;

[0008] The needle handle is fixedly arranged at the tail end of the needle body, the cutter is slidably placed in the inner cavity of the needle body, the end is fixedly connected to the support spring, the tail end is fixedly connected to the pusher, the pusher is slidably connected to the needle handle, and the support spring is fixedly connected to the inner cavity of the head end of the needle body;

[0009] Furthermore, the cutter is a metal strip, and a blade is fixedly provided at the outer end of the metal strip, the supporting spring comprises a main spring and an auxiliary spring, one end of the main spring is fixedly connected to the needle body, and the other end is fixedly connected to the head end of the cutter, one end of the auxiliary spring is fixedly connected to the bottom of the main spring, and the other end is not connected to the cutter;

[0010] Furthermore, the inner cavity of the needle body is provided with a sliding hole, and the head end is provided with a rectangular hole penetrating to the sliding hole, the cutter is placed in the sliding hole, and its end is placed in the rectangular hole, and one end of the support spring is fixedly connected to the front end of the inner cavity of the rectangular hole;

[0011] Furthermore, the tangent line of the arc of the cutter that rises upward in the rectangular hole forms an angle of 60 degrees with the axis of the needle body;

[0012] Furthermore, a slide groove connected to the slide hole is provided in the needle handle, a through hole penetrating the slide groove is provided above the slide groove, and rectangular slide grooves are provided on the left and right sides of the slide groove; the pusher is slidably connected in the annular groove, and a tension spring is provided at the tail end to be fixedly connected to the rear side wall of the slide groove; a smooth groove is provided on the side wall of the rectangular slide groove;

[0013] Furthermore, the pusher includes limiting teeth fixedly connected to both sides of the pusher body and a toggle block fixedly connected to the upper part of the pusher body, and the toggle block passes through the through hole and is placed on the upper surface of the needle handle;

[0014] Furthermore, the limiting tooth is slidably connected with a fixed tooth that telescopes outward, the outer end of the fixed tooth is arc-shaped, and a spring is fixedly provided at the rear of the fixed tooth;

[0015] The beneficial effects of the present invention are:

[0016] The present invention changes the traditional needle knife form and converts it into two parts: a needle body and a cutter. The cutter can be pushed forward under the action of a pusher. During the pushing process, due to the action of the supporting spring, its end will be propped up, thereby forming an arc-shaped curved knife, which can pull the entire device to cut the tendon sheath. The tangent line of the arc curved knife and the axis of the needle body form an angle of 60 degrees, so that the tip of the knife is always hooked backward. Compared with the smooth needle knife in the prior art, the tip of the knife will not slip off the tendon sheath during the cutting of the tendon sheath, thereby improving the success rate of cutting. After the cutting is completed, the pusher is pressed, the cutter is retracted into the needle cavity, and the needle knife returns to a straight needle body, reducing the damage to the surrounding tissues when the needle is withdrawn. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of a needle knife used for treating tenosynovitis;

[0019] Figure 2 It is a schematic diagram of the overall structure of a needle knife used for treating tenosynovitis;

[0020] Figure 3 This is a schematic diagram of the internal structure of the tail end of a needle knife used to treat tenosynovitis;

[0021] Figure 4 It is a schematic cross-sectional view of a needle knife used for treating tenosynovitis;

[0022] Figure 5 The schematic diagram of the cross-sectional structure of the needle handle of an acupotomy needle for treating tenosynovitis;

[0023] Figure 6 The schematic diagram of the cross-sectional structure of a pusher of a needle knife for treating tenosynovitis;

[0024] Figure 7 The present invention is a schematic diagram of the end structure of a needle knife used for treating tenosynovitis.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1-needle body, 11-slide hole, 12-rectangular hole, 2-needle handle, 21-rectangular slide groove, 22-arc groove, 23-through hole, 3-cutter, 4-support spring, 5-pusher, 51-toggle block, 52-limiting tooth, 53-fixing tooth, 6-tension spring, 7-spring. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Example 1

[0029] See also Figures 1 to 7 As shown, a needle knife for treating tenosynovitis comprises: a needle body 1, a needle handle 2, a cutter 3, a supporting spring 4, and a pusher 5;

[0030] The needle handle 2 is fixedly arranged at the tail end of the needle body 1, the cutter 3 is slidably placed in the inner cavity of the needle body 1, the end is fixedly connected to the support spring 4, and the tail end is fixedly connected to the pusher 5, the pusher is slidably connected to the needle handle 2, and the support spring 4 is fixedly connected to the inner cavity of the head end of the needle body 1; the pusher 5 drives the cutter 3 to move forward, and under the action of the support spring 4, the end of the cutter 3 is lifted out of the needle body 1 to form an arc-shaped curved knife for cutting;

[0031] In this embodiment, the cutter 3 is a metal strip, and a blade is fixedly arranged at the outer end of the metal strip. The metal strip is elastic. On the one hand, when the end of the metal strip is lifted out of the needle body 1, it is in an arc shape instead of being directly bent. On the other hand, it provides a force for the cutter 3 to restore its original shape, so that after the pusher 5 is released, the cutter 3 can still become a straight strip; the supporting spring 4 includes a main spring and an auxiliary spring, one end of the main spring is fixedly connected to the needle body 1, and the other end is fixedly connected to the head end of the cutter 3, one end of the auxiliary spring is fixedly connected to the bottom of the main spring, and the other end is not connected to the cutter 3; in actual use, the main spring lifts the end of the cutter 3 upward, and the auxiliary spring supports the bottom of the end of the cutter 3, so that the entire cutter 3 has sufficient supporting force when it is pulled backward;

[0032] In this embodiment, the inner cavity of the needle body 1 is provided with a sliding hole 11, and the head end is provided with a rectangular hole 12 penetrating to the sliding hole 11, the cutter 3 is placed in the sliding hole 11, and its end is placed in the rectangular hole 12, and one end of the support spring 4 is fixedly connected to the front end of the inner cavity of the rectangular hole 12;

[0033] In this embodiment, the tangent of the arc that rises upward in the rectangular hole 12 of the cutter 3 forms an angle of 60 degrees with the axis of the needle body 1; based on the operation of the above-mentioned cutter 3, its angle of 90 degrees is adopted in actual use, but there is still a situation where the cut tendon sheath slips, resulting in the need for repeated cutting; combined with mechanical principles, it is verified that the angle must be less than 90 degrees, so that the barb formed in this way has cutting stability. In this embodiment, the preferred angle is 60 degrees, which can not only stabilize the cutting, but also facilitate the tip of the cutter 3 to be tilted.

[0034] Example 2

[0035] Based on the above embodiment 1, this embodiment provides a specific implementation form of driving the cutter 3;

[0036] In this embodiment, a slide groove connected to the slide hole 11 is provided in the needle handle 2, a through hole 23 penetrating the slide groove is provided above the slide groove, and rectangular slide grooves 21 are provided on the left and right sides of the slide groove; the pusher 5 is slidably connected in the annular groove, and a tension spring 6 is provided at the tail end to be fixedly connected to the rear side wall of the slide groove; a smooth groove is provided on the side wall of the rectangular slide groove 21;

[0037] The pusher 5 includes limit teeth 52 fixedly connected to both sides of the pusher 5 body and a wave block fixedly connected to the upper part of the pusher 5 body. The toggle block 51 passes through the through hole 23 and is placed on the upper surface of the needle handle 2.

[0038] The limiting tooth 52 is slidably connected with a fixed tooth 53 which is telescoped outward, and the outer end of the fixed tooth 53 is arc-shaped. A spring 7 is fixed to the rear of the fixed tooth 53. When the pusher 5 is pushed, the fixed tooth 53 jumps from one arc groove to an adjacent arc groove. Under the action of the elastic force of the spring 7, the fixed tooth 53 is always in the arc groove to limit the pusher 5. The arc setting facilitates the position change of the pusher.

[0039] To sum up, the present invention changes the traditional needle knife form and converts it into two parts: a needle body and a cutter. The cutter can be pushed forward by the pusher. During the pushing process, due to the action of the supporting spring, its end will be propped up upward to form an arc-shaped curved knife, which can pull the entire device to cut the tendon sheath. The tangent line of the blade tip of the arc curved knife and the axis of the needle body form an angle of 60 degrees, so that the blade tip is always hooked backward. Compared with the smooth needle knife in the prior art, the blade tip will not slip off the tendon sheath during the cutting process, thereby improving the success rate of cutting.

[0040] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A needle knife for treating tenosynovitis, characterized in that: include: Needle body, needle handle, cutter, support spring, pusher; The needle handle is fixedly arranged at the tail end of the needle body, the cutter is slidably placed in the inner cavity of the needle body, the end is fixedly connected to the support spring, the tail end is fixedly connected to the pusher, the pusher is slidably connected to the needle handle, and the support spring is fixedly connected to the inner cavity of the head end of the needle body; The cutter is a metal strip, and a blade is fixedly provided at the outer end of the metal strip. The supporting spring includes a main spring and an auxiliary spring. One end of the main spring is fixedly connected to the needle body, and the other end is fixedly connected to the head end of the cutter. One end of the auxiliary spring is fixedly connected to the bottom of the main spring, and the other end is not connected to the cutter. The inner cavity of the needle body is provided with a sliding hole, and the head end is provided with a rectangular hole penetrating to the sliding hole, the cutter is placed in the sliding hole, and its end is placed in the rectangular hole, and one end of the support spring is fixedly connected to the front end of the inner cavity of the rectangular hole; The tangent line of the arc of the cutter that rises upward in the rectangular hole forms an angle of 60 degrees with the axis of the needle body; The needle handle is provided with a slide groove connected to the slide hole, a through hole penetrating the slide groove is provided above the slide groove, and rectangular slide grooves are provided on the left and right sides of the slide groove; the pusher is slidably connected in the ring groove, and a tension spring is provided at the tail end to be fixedly connected to the rear side wall of the slide groove; a smooth groove is provided on the side wall of the rectangular slide groove; The pusher includes limiting teeth fixedly connected to both sides of the pusher body and a toggle block fixedly connected to the upper part of the pusher body, and the toggle block passes through the through hole and is placed on the upper surface of the needle handle; The limiting tooth is slidably connected with a fixed tooth that is telescoped outwards, the outer end of the fixed tooth is in an arc shape, and a spring is fixedly provided at the rear of the fixed tooth.

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