Arc-blade needle knife
By using arc-edge needle knife, the needle blade is meniscus shape and is cut and loosened in-plane, solving the problem that existing small needle knife is difficult to quickly and thoroughly loosen the trolley ligament, achieving smaller tissue damage and better therapeutic effects.
Patent Information
- Application Number
- CN202421189743.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-05-28
AI Technical Summary
When treating adult stenosis tendonitis and the trigger thumb of children, existing small needle knives are difficult to quickly and thoroughly loosen the contracture tension ligament, which is easy to damage the tendon, and the lifting and inserting and cutting leads to swelling and pain, remaining tendon scar nodules, and even tendon rupture.
An arc-edged needle knife is used, and the needle blade is meniscus. By entering the needle point as a fulcrum, the needle tail is shaken to achieve the cutting and loosening of the needle blade in the relative plane, which weakens the secondary damage to the tendon and surrounding soft tissue.
It achieves a more thorough loosening of the lesion tissue, reduces the damage to surrounding tissues, reduces the risk of postoperative swelling, pain and remaining scars, and improves the safety and effectiveness of treatment.
Smart Images
Figure CN222787822U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of medical tools, in particular to an arc-edged needle knife. Background Art
[0002] Adult stenosing tenosynovitis and pediatric trigger thumb are unique acquired deformities, most common in the thumb, but also common in the other four fingers. The main cause is currently considered to be the enlargement of the flexor tendons and the stenosis of the trochlear ligament. A large number of children cannot heal on their own. Long-term flexion contracture causes adhesion of the interphalangeal joints, tendon shortening, and hyperextension and subluxation of the metacarpophalangeal joints, affecting the normal growth and development of the finger joints, intellectual development, and fine manual movements such as writing and learning, and even affecting children's self-confidence.
[0003] At present, the commonly used treatment methods are small needle knife treatment and traditional surgery to release the trochlear ligament. Traditional surgery is generally performed under general anesthesia, which has certain risks, slow recovery after surgery, high cost, and residual scars that can affect joint function. Figure 1 As shown, whether it is a flat knife ( Figure 1 Left) or V-shaped knife ( Figure 1 (2) The needle blades are all at the front end, and the lifting, inserting, cutting and releasing methods are generally used. It is difficult to quickly and thoroughly release the contracted and tense trochlear ligament. When breaking through the narrow trochlear ligament, the inertial force during the breakthrough often damages the tendon. Moreover, the lifting, inserting and cutting methods often fail to release the ligament properly, increasing swelling and pain, leaving tendon scar nodules, and even tendon rupture. Some also use the flat-push acupuncture method parallel to the skin, which has a long knife stroke, causes great damage to the surrounding tissues, and the needle tip positioning is not clear.
[0004] The single-beveled needle knife of the utility model uses ultrasound to check the layers of the tissue lesion site. After the needle reaches the site, the skin at the needle insertion point is used as a fulcrum, and the needle tail is shaken away from the needle blade, so that the needle blade cuts the lesion tissue in a relative plane. When releasing the superficial tissue, after the needle is inserted, the operator's left thumb presses the skin in front of the needle blade, pulls the skin away, and uses the needle insertion point as a fulcrum to pull the needle blade for plane cutting. It causes less tissue damage than other methods and releases the lesion tissue more thoroughly. It is competent for tissue release operations such as adult stenosing tenosynovitis and pediatric trigger thumb, myofasciitis, fascial pain syndrome, osteoarthritis, etc. Summary of the invention
[0005] The utility model aims to provide an arc-edged needle knife with accurate positioning and little damage to surrounding tissues.
[0006] In order to achieve the above-mentioned invention purpose, the technical solution adopted by the utility model is: an arc-blade needle knife, including a rod-shaped needle handle and a needle body installed at one end of the needle handle, a needle blade is arranged on one side of the end of the needle body, and the needle blade is crescent-shaped; a positioning needle sleeve is also arranged on the needle body to form a damping sliding fit with the needle body.
[0007] Preferably, the positioning needle sleeve is a silicone sleeve.
[0008] Preferably, the diameter of the needle body is 1 mm.
[0009] Preferably, the length of the needle blade is 2-4 mm.
[0010] Preferably, an indicator sheet is provided on one side of the upper end of the needle handle, and the direction of the indicator sheet is the same as the direction of the needle blade.
[0011] Preferably, the indicator sheet is semicircular.
[0012] Preferably, side grooves are provided in the middle of the front and rear blade surfaces of the needle blade, and the side grooves extend from the blade surface close to the cutting edge to the back side of the needle blade.
[0013] Preferably, a long groove extending along the length direction of the needle body is formed on the side wall of the needle body, and the position of the long groove on the needle body corresponds to the direction of the needle blade; a convex portion matching the long groove is provided on the inner wall of the positioning needle sleeve.
[0014] Preferably, the needle handle is a plastic handle.
[0015] Preferably, the outer surface of the needle handle is provided with anti-slip patterns.
[0016] The beneficial effects of the utility model are mainly reflected in that it changes the traditional insertion and lifting loosening method, the loosening positioning is more accurate, and the damage to the surrounding tissues is small. During use, the utility model uses a crescent-shaped needle blade to vertically insert the needle, and then uses the skin at the needle insertion point as a guide to swing the needle tail, and the single crescent-shaped blade is used to achieve cutting and loosening of the tissue in a fixed plane, thereby reducing the secondary damage of the traditional insertion and lifting loosening to the tendon and surrounding soft tissues. At the same time, because it is a blind operation, the utility model uses a crescent-shaped needle blade, which can improve the hand feel feedback during operation to a certain extent compared with a straight oblique blade, which is conducive to the operating doctor to better grasp the operation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of an existing small needle knife;
[0018] Figure 2 It is a schematic diagram of the structure of the utility model;
[0019] Figure 3 for Figure 2 The enlarged view of the middle A part, and the right view of the enlarged part;
[0020] Figure 4 for Figure 3 A schematic structural diagram of the structure shown in a preferred embodiment;
[0021] Figure 5 It is a schematic diagram of the cross-sectional structure of the positioning needle sleeve. DETAILED DESCRIPTION
[0022] like Figure 2 The arc-blade needle knife shown is mainly used in the treatment of adult stenosing tenosynovitis and pediatric trigger thumb to cut and release tissues. It can also be used for tissue release operations such as myofasciitis, fascial pain syndrome, and osteoarthritis.
[0023] like Figure 1 As shown, the existing small needle knife is either a flat-head knife ( Figure 1 center left), or V-shaped knife ( Figure 1 The cutting edge is located at the end of the blade. Figure 1 The lower section of the blade body, such a blade type (needle type) can only be operated by insertion and lifting during operation, which will inevitably cause damage to other tissues. To use a very vivid metaphor in loosening the tendon sheath, that is, after the tendon sheath is loosened, the flexor tendon is also pierced like a sieve. In severe cases, it may even cause medical risks such as tendon rupture.
[0024] The utility model changes the traditional end blade method and chooses to open a needle blade 3 on one side of the end of the needle body 2 to achieve vertical needle insertion and loosening in the horizontal plane. After one needle insertion, horizontal cutting can complete the loosening, which can protect the surrounding tissues to the greatest extent.
[0025] like Figure 2 As shown in , the utility model includes a rod-shaped needle handle 1 and a needle body 2 installed at one end of the needle handle 1, and the diameter of the needle body 2 is usually 1 mm. The needle handle 1 is a plastic handle, and anti-slip patterns are usually formed on it to prevent slipping when holding. The needle handle 1 can be a perfect circular handle with a cross section or an elliptical handle with a certain flatness. At the same time, since the utility model adopts a single-blade form and is operated under blind vision, in order to facilitate the operator to intuitively grasp the direction of the blade, an indicator sheet 5 is provided on one side of the upper end of the needle handle 1, and the direction of the indicator sheet 5 is the same as the direction of the needle blade 3. There are many specific shapes of the indicator sheet 5, such as semicircular, triangular, etc.
[0026] Combination Figure 2 and 3 As shown in the figure, a needle blade 3 is arranged at one side of the end of the needle body 2 of the utility model. The length of the needle blade 3 is 2-4 mm and the needle blade 3 is crescent-shaped. Compared with the general straight bevel blade, it can improve the hand feeling feedback during operation to a certain extent, which is conducive to the operating doctor to better grasp the operation accuracy. Of course, a better approach can also be to compare Figure 3 and 4As shown in the figure, the middle part of the front and rear blades of the needle blade 3 is provided with a side groove 6, and the side groove 6 extends from the blade surface close to the cutting edge to the back side of the needle blade 3. Since the side groove 6 is in contact with the tissue during the loosening and cutting, the existence of the side groove 6 enables more obvious contact feel feedback during needle movement, which is convenient for the operating doctor to judge the needle insertion depth, cutting level and other information. At the same time, the side groove 6 usually adopts an arc shape with a small end close to the needle blade 3 and a slightly larger end. It can also guide the tissue to peel to a certain extent, which is particularly suitable for tendon sheath loosening.
[0027] In order to make an overall judgment on the insertion depth of the needle body 2, a better approach of the present invention may be that the needle body 2 is also provided with a positioning needle sleeve 4 which forms a damping sliding fit with the needle body 2, and the positioning needle sleeve 4 is a silicone sleeve. The positioning needle sleeve 4 can limit the insertion depth of the needle to prevent excessive insertion of the needle. Regarding its specific installation form, a better implementation method is as follows: if combined with Figure 4 and 5 As shown in the figure, a long groove 7 extending along the length direction of the needle body 2 is formed on the side wall of the needle body 2. Since the long groove 7 is relatively thin, it can generally be formed by laser cutting. The position of the long groove 7 on the needle body 2 corresponds to the direction of the needle blade 3, and can also play the role of indicating the needle blade 3. A convex portion 8 matching the long groove 7 is provided on the inner wall of the positioning needle sleeve 4. The presence of the convex portion 8 makes the sliding of the positioning needle sleeve 4 on the needle body 2 more stable and has a better damping effect.
Claims
1. An arc-edged needle knife, characterized in that: The invention comprises a rod-shaped needle handle (1) and a needle body (2) mounted at one end of the needle handle (1); a needle blade (3) is arranged on one side of the end of the needle body (2); the needle blade (3) is in a crescent shape; and a positioning needle sleeve (4) is also arranged on the needle body (2) and forms a damping sliding fit with the needle body (2).
2. The arc-edge needle knife according to claim 1, characterized in that: The positioning needle sleeve (4) is a silicone sleeve.
3. The arc-edged needle knife according to claim 2, characterized in that: The diameter of the needle body (2) is 1 mm.
4. The arc-edged needle knife according to claim 3, characterized in that: The length of the needle blade (3) is 2-4 mm.
5. The arc-edge needle knife according to claim 4, characterized in that: An indicator sheet (5) is provided on one side of the upper end of the needle handle (1), and the direction of the indicator sheet (5) is the same as the direction of the needle blade (3).
6. The arc-edged needle knife according to claim 5, characterized in that: The indicator sheet (5) is semicircular.
7. The arc-edge needle knife according to claim 1, characterized in that: The middle parts of the front and rear blade surfaces of the needle blade (3) are both provided with side grooves (6), and the side grooves (6) extend from the blade surface close to the cutting edge to the back side of the needle blade (3).
8. The arc-edge needle knife according to claim 2, characterized in that: A long groove (7) extending along the length direction of the needle body (2) is formed on the side wall of the needle body (2), and the position of the long groove (7) on the needle body (2) corresponds to the direction of the needle blade (3); and a convex portion (8) matching with the long groove (7) is arranged on the inner wall of the positioning needle sleeve (4).
9. The arc-edge needle knife according to claim 1, characterized in that: The needle handle (1) is a plastic handle.
10. The arc-edge needle knife according to claim 9, characterized in that: The outer surface of the needle handle (1) is provided with anti-slip patterns.