Cutter for minimally invasive surgery

Abstract

A cutter for minimally invasive surgery effectively solves the problems that time and labor are wasted, and the treatment effect is poor, and comprises a shell, a cutter body and a cutter tail shaft, the cutter body is fixedly connected with the cutter tail shaft, an arc-shaped cutter edge is arranged at the left end of the cutter body, positioning shafts are coaxially fixed to the cutter tail shaft, the positioning shafts are located on the front side and the rear side of the cutter tail shaft, and the positioning shafts are rotationally connected with the shell. A plurality of protruding blocks are evenly fixed to the circumferences of the front end face and the rear end face of the cutter tail shaft, grooves matched with the protruding blocks are formed in the shell, and a first limiting block and a second limiting block are fixed to the outer surface of the cutter tail shaft.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to a cutting knife for minimally invasive surgery. Background Art

[0002] The small needle knife is shaped like an acupuncture needle, but its tip has a narrow blade, which can perform the dual functions of acupuncture and knife cutting, and is used to treat diseases such as cervical spondylosis, lumbar spondylosis, soft tissue injury, bursitis, acute and chronic tenosynovitis and tendon sheath cyst, myofascial pain syndrome, etc.

[0003] The existing small needle knife has the following deficiencies in the use process: 1. When the small needle knife punctures to the target point and encounters fascia or scars (obstacles), etc., the operator needs to use a large amount of force to push the small needle knife through the obstacle; 2. When the small needle knife reaches the target point, the small needle knife pushes the target organ to both sides of the blade, so it needs to be pushed and pulled back and forth many times to achieve the treatment purpose. Each push and pull causes multiple injuries to the surrounding organs to varying degrees. Sometimes there is an incomplete decompression phenomenon, increasing the burden on the operator and the operation time is relatively long. Summary of the Utility Model

[0004] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the utility model is to provide a cutting knife for minimally invasive surgery, which effectively solves the problems of time-consuming, laborious and poor treatment effect.

[0005] The technical solution for solving the technical problem is: it includes a shell, a knife body and a knife tail shaft. The knife body and the knife tail shaft are fixedly connected. The left end of the knife body is provided with an arc-shaped knife edge. The knife tail shaft is coaxially fixed with a positioning shaft. The positioning shaft is located on the front and rear sides of the knife tail shaft. The positioning shaft is rotatably connected with the shell. A plurality of convex blocks are evenly fixed on the circumferences of the front and rear end faces of the knife tail shaft. Grooves matching with the convex blocks are arranged in the shell. A first limit block and a second limit block are fixed on the outer surface of the knife tail shaft.

[0006] Preferably, a handle is fixed to the right end of the shell.

[0007] Preferably, angle lines are arranged on the outer side of the shell.

[0008] The present utility model has the following advantages compared with traditional equipment: 1) The structure is ingenious. When the arc-shaped cutting edge approaches the target (tendon sheath), it can cut the target more effectively, so as to achieve the purpose of completely cutting the target, thus achieving a more efficient treatment purpose. In this way, after reaching the target, it can cut the target more accurately and easily, reducing the disadvantages of the original small needle knife's back-and-forth and repeated pushing and pulling on the surrounding soft tissues and organs, so as to achieve an efficient treatment purpose; 2) The knife body can be adjusted arbitrarily from 0 to 90 degrees at the joint, which is beneficial to selecting a suitable angle (between the skin entry point and the target) when removing the target, making it more suitable for judging the target to be removed and more flexible. Push the target towards the front of the knife body, and while pushing forward, the target organ retracts into the arc-shaped cutting edge with its own elasticity, so as to cut the target organ better and more completely, thus achieving the treatment purpose, saving time and effort, and having a good treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a schematic diagram of the three-dimensional structure of the present utility model;

[0010] Figure 2 is a schematic diagram of the top view of the present utility model;

[0011] Figure 3 is a schematic diagram of the three-dimensional structure of the housing in the present utility model;

[0012] Figure 4 is a schematic diagram of the three-dimensional structure of the knife tail shaft in the present utility model;

[0013] Figure 5 is a schematic diagram of the arc-shaped cutting edge in contact with the skin in the present utility model;

[0014] Figure 6 is a schematic diagram of the arc-shaped cutting edge in contact with the target organ in the present utility model.

[0015] Reference numerals: 1, housing; 2, knife body; 3, knife tail shaft; 4, arc-shaped cutting edge; 5, positioning shaft; 6, convex block; 7, groove; 8, first limiting block; 9, second limiting block; 10, handle; 11, angle line. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following further details the specific embodiments of the present utility model in conjunction with the accompanying drawings.

[0017] By Figures 1 to 6Provided is a cutter for minimally invasive surgery, including a housing 1, a cutter body 2 and a cutter tail shaft 3. The cutter body 2 and the cutter tail shaft 3 are fixedly connected. An arc-shaped cutting edge 4 is provided at the left end of the cutter body 2. A positioning shaft 5 is coaxially fixed to the cutter tail shaft 3. The positioning shaft 5 is located on the front and back sides of the cutter tail shaft 3. The positioning shaft 5 is rotatably connected to the housing 1. A plurality of convex blocks 6 are uniformly fixed on the circumferences of the front and back end faces of the cutter tail shaft 3. A groove 7 matching with the convex block 6 is provided in the housing 1. A first limiting block 8 and a second limiting block 9 are fixed on the outer surface of the cutter tail shaft 3.

[0018] A handle 10 is fixed to the right end of the housing 1.

[0019] Angle lines 11 are provided on the outer side of the housing 1.

[0020] When in use, when the first limiting block 8 is clamped with the inner surface of the housing 1, the cutter body 2 is in a horizontal state. As the cutter tail shaft 3 rotates in the housing 1, the first limiting block 8 is disengaged from the inner surface of the housing 1. When the second limiting block 9 is clamped with the inner surface of the housing 1, the cutter body 2 is in a vertical state. Furthermore, the angle adjustment range of the cutter body 2 is 0-90°. When the staff rotates the cutter body 2, during the rotation of the cutter body 2, the convex block 6 is made of rubber material and has a certain elasticity. The convex block 6 is forced to disengage from the groove 7 and then moves to the next groove 7, so that the angle of the cutter body 2 can be positioned at any time, which is convenient for adjustment, time-saving and labor-saving, avoiding multiple back-and-forth pushing and pulling, greatly reducing the operation time, reducing the pressure on the operator, and better achieving the treatment purpose.

[0021] This product is used for incising target organs with clear targets, such as diseases that require incising the flexor retinaculum, such as stenosing tenosynovitis and carpal tunnel syndrome. Utilizing the elastic retraction of the target organ, the annular fibers of the target organ, such as the retinaculum, are elastically retracted into the arc-shaped cutting edge 4 by their own elasticity. When the cutter body 2 is advanced, the arc-shaped cutting edge 4 can quickly incise the target organ, with high working efficiency, reduced pushing and pulling times, and correspondingly reduced damage to the surrounding tissues. The cutter body 2 can be freely adjusted and bent at 0 to 90 degrees at the joint. The plane of the handle 10 is perpendicular to the cutter surface, which is more conducive to the operator's thumb and index finger to hold, facilitating the operator to push and pull the cutter body 2 back and forth. Especially under ultrasonic guidance, it is better to master the position of holding the arc-shaped cutting edge 4 and adjust the angle according to the position of the arc-shaped cutting edge 4 and the target point. For example, when encountering organs such as nerves and blood vessels during advancement, the angle can be adjusted to effectively avoid damaging unnecessary organs, achieve the expected treatment purpose, relieve the pain of the patient, and improve the confidence of the operator and the patient.

Claims

1. A cutting knife for minimally invasive surgery, characterized in that: The utility model comprises a shell (1), a knife body (2) and a knife tail shaft (3), wherein the knife body (2) and the knife tail shaft (3) are fixedly connected, an arc-shaped knife edge (4) is provided at the left end of the knife body (2), a positioning shaft (5) is coaxially fixed to the knife tail shaft (3), the positioning shaft (5) is located at the front and rear sides of the knife tail shaft (3), the positioning shaft (5) is rotatably connected to the shell (1), a plurality of protrusions (6) are evenly fixed on the circumference of the front and rear end surfaces of the knife tail shaft (3), a groove (7) matching with the protrusion (6) is provided in the shell (1), and a first limit block (8) and a second limit block (9) are fixed on the outer surface of the knife tail shaft (3).

2. A cutting knife for minimally invasive surgery according to claim 1, characterized in that: A handle (10) is fixed to the right end of the housing (1).

3. A cutting knife for minimally invasive surgery according to claim 1, characterized in that: An angle line (11) is provided on the outer side of the shell (1).

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