Tenosynovitis stenosing knife

Abstract

The utility model discloses a stenosis tenosynovitis cutting knife, comprising a curved knife part and a straight handle part, wherein the inner side of the front end of the curved knife part is provided with a cutting edge for cutting the tendon sheath joint, the straight handle part is also provided with a sliding sleeve, the front end of the straight handle part is provided with a first limiting ring, the tail part is provided with a second limiting ring, the tail part of the sliding sleeve is provided with a limiting ring which can be matched with the first limiting ring and the second limiting ring; a clamping device is also provided between the second limiting ring of the straight handle part and the limiting ring of the sliding sleeve. The stenosis tenosynovitis cutting knife of the utility model has an ingenious structure, and the stenosis tenosynovitis cutting knife is designed to be a curved knife structure and the curved knife part can be covered when entering and exiting, and the curved knife part will not be affected by the sliding sleeve during the operation, so that the fault tolerance rate of the operation process is greatly improved, and unnecessary accidental injuries are greatly avoided, so that the doctor's operation process can be faster and simpler, the patient's pain is greatly reduced, and the wound is easier to recover, which is particularly suitable for use in the operation of stenosis tenosynovitis.

Description

Technical Field

[0001] The utility model belongs to the field of medical instruments, in particular to a stenotic tenosynovitis cutting knife. Background Art

[0002] Tenosynovitis is a disease that seriously affects the joint movement of the human body and is very painful. For the treatment of tenosynovitis, especially the treatment of stenosing tenosynovitis, the existing technology is as follows Figure 1 As shown, the skin is usually incised first, stretched and fixed, and then the scalpel head is inserted for cutting, so as to gradually cut the massed tendon joints into strips. The scalpel is a common straight beveled scalpel. However, in this method, the scalpel is easy to accidentally pierce the healthy tissue in front of the blade head when it advances and cuts backwards once and then advances forward to cut again, causing the wound to become larger and the recovery time to be prolonged. In order to avoid this situation, the doctor will be very careful during the operation, which makes the operation process longer and the patient's pain increases. Utility Model Content

[0003] The utility model aims to provide a stenotic tenosynovitis cutting knife which is easy to use, not prone to accidental injury, well protects surrounding tissues and can improve surgical efficiency.

[0004] The utility model is realized by the following technical solutions:

[0005] The stenosis tenosynovitis cutting knife comprises a curved blade portion at the front end and a straight handle portion connected to the rear end of the curved blade portion, the inner side of the front end of the curved blade portion is provided with a cutting edge for cutting the tendon sheath joint, and the straight handle portion is also sleeved with a sliding sleeve, the front end of the straight handle portion is provided with a first limiting ring, and the rear end is provided with a second limiting ring, and the rear end of the sliding sleeve is provided with a limiting ring that can cooperate with the first limiting ring and the second limiting ring, so that the sliding sleeve can slide forward to cover the curved blade portion or slide backward to expose the curved blade portion without slipping off the straight handle portion; a locking device is also provided between the second limiting ring of the straight handle portion and the limiting ring of the sliding sleeve.

[0006] Preferably, the second limiting ring is detachably fixed to the tail of the straight handle by bolt fixing, rubber clamp fixing, or threaded fixing to facilitate the assembly of the sliding sleeve.

[0007] Preferably, the engaging device comprises a positioning groove on the surface where the second limiting ring of the straight shank contacts the limiting ring of the sliding sleeve, and a positioning protrusion on the limiting ring of the sliding sleeve which can be interference-engaged with the positioning groove.

[0008] More preferably, two symmetrically arranged positioning grooves are provided on the surface where the second limiting ring of the straight shank contacts the limiting ring of the sliding sleeve, and two positioning protrusions which can be interference-engaged with the two positioning grooves are provided on the limiting ring of the sliding sleeve.

[0009] Preferably, a smooth transition structure is provided on the end surface of the front end of the sliding sleeve to prevent it from causing damage to healthy tissue.

[0010] Instructions for use: When the scimitar part needs to be inserted into the surgical site, let the sliding sleeve slide forward to cover the scimitar part and then insert it; when the scimitar needs to cut the tendon sheath and tendon joints, slide the sliding sleeve backward to expose the scimitar part and then perform the operation. At this time, the rear end of the sliding sleeve is engaged with the second limit ring through the locking device to fix the sliding sleeve to prevent it from sliding forward and affecting the operation; when the operation is completed, slide the sliding sleeve forward to cover the scimitar part and then withdraw the scimitar part.

[0011] Specific surgical procedures:

[0012] First, the skin above the tendon sheath muscle joint is cut open, the skin is stretched open and fixed, and the front end of the stenosis tenosynovitis cutter covered by the sliding sleeve is inserted into the stretched skin. At this time, the curved blade part is well covered and protected by the sliding sleeve, so that the curved blade will not cause accidental injury to the healthy tissue passing through. Then the sliding sleeve is pulled backward to expose the part where the blade edge of the curved blade part is located, and the blade edge of the curved blade part is used to gradually cut the group-shaped tendon sheath muscle joint into strips and cut it open. At this time, because the front end of the stenosis tenosynovitis cutter is a curved blade structure with the blade edge on the inside, it can well avoid the situation that the healthy tissue in front of the blade head is easily stabbed by mistake when the straight oblique scalpel is used before, and the knife is inserted and cut backwards once, and then the curved blade is withdrawn to prevent accidental injury to the healthy tissue passing through. After that, the curved blade can also be well stored to prevent cutting people.

[0013] The beneficial effects of the utility model are:

[0014] The stenosis tenosynovitis cutting knife of the utility model has an ingenious structure, because the front end of the cutting knife is a curved blade part, and the cutting edge is on the inner side, thereby effectively avoiding the problem that the healthy tissue in front of the blade head is easily injured by mistake when the straight oblique-blade scalpel is used before, and the healthy tissue in front of the blade head is easily injured when the blade is advanced and cut backwards once and then advanced forward again for cutting; at the same time, the curved blade part is well shielded and protected by the sliding sleeve when the blade is advanced, so that the curved blade part will not cause accidental injury to the healthy skin where the curved blade passes; after the cutting is completed, the curved blade part is again covered by the sliding sleeve when withdrawing, so that the curved blade part can avoid accidentally injuring the healthy tissue when withdrawing, and then because of the protection of the sliding sleeve, the curved blade can also be well stored to prevent cutting people, thereby, by designing the blade head into a curved blade structure and allowing the curved blade part to be covered when entering and exiting, and at the same time, the curved blade part will not be affected by the sliding sleeve during the operation, so that the fault tolerance rate of the operation process is greatly improved, unnecessary accidental injury is greatly avoided, and the doctor's operation process can be faster and simpler, the patient's pain is greatly reduced, and the wound is easier to recover. The utility model is particularly suitable for use in the operation of stenosis tenosynovitis, has strong practicality, and is worthy of promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0016] Figure 1 A schematic diagram of a conventional surgery for tendonitis in the background art;

[0017] Figure 2 It is a schematic diagram of the working state of the stenosing tenosynovitis cutting knife of the embodiment of the utility model when performing surgery on the tendon sheath joint of the finger;

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the stenosis tenosynovitis cutting knife when the sliding sleeve of the utility model embodiment does not cover the curved knife part;

[0019] Figure 4 It is a perspective view of the three-dimensional structure of the embodiment of the utility model when the sliding sleeve of the stenosis tenosynovitis cutting knife covers the curved knife part;

[0020] Figure 5 for Figure 4 Schematic diagram of the main structure;

[0021] Figure 6 for Figure 5 A schematic cross-sectional structure diagram of the CC direction;

[0022] Figure 7 for Figure 6 Enlarged view of point A in the middle;

[0023] Figure 8 for Figure 4 A schematic diagram of the main structure viewed from another angle;

[0024] Fig. 9 This is a schematic diagram of the working state of the stenosing tenosynovitis cutting knife of an embodiment of the utility model when performing surgery on the tendon sheath joint on the palm. DETAILED DESCRIPTION

[0025] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0026] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0027] like Figure 2-9As shown, the stenotic tenosynovitis cutting knife 10 comprises a curved blade portion 1 at the front end and a straight handle portion 2 connected to the rear end of the curved blade portion 1, the inner side of the front end of the curved blade portion 1 is provided with a cutting edge 3 for cutting the tendon sheath joint, the straight handle portion 2 is also provided with a sliding sleeve 4, the front end of the straight handle portion 2 is provided with a first limiting ring 5, and the tail is provided with a second limiting ring 6, the tail of the sliding sleeve 4 is provided with a limiting ring 7 which can cooperate with the first limiting ring 5 and the second limiting ring 6, so that the sliding sleeve 4 can slide forward to cover the curved blade portion 1 or slide backward to expose the curved blade portion 1 without slipping off the straight handle portion 2; a locking device is also provided between the second limiting ring 6 of the straight handle portion 2 and the limiting ring 7 of the sliding sleeve 4.

[0028] The engaging device includes a positioning groove 8 on the surface where the second limiting ring 6 of the straight handle 2 contacts the limiting ring 7 of the sliding sleeve 4 and a positioning protrusion 9 on the limiting ring 7 of the sliding sleeve 4 which can be interference-engaged with the positioning groove 8.

[0029] The second limiting ring 6 is detachably fixed to the tail of the straight shank 2 by bolt fixing, rubber clamp fixing, or threaded fixing to facilitate the assembly of the sliding sleeve 4, that is, the sliding sleeve 4 is first put on the straight shank 2, and then the second limiting ring 6 is installed on the tail of the straight shank 2 to limit the sliding sleeve 4 on the straight shank and prevent it from slipping.

[0030] Two symmetrically arranged positioning grooves 8 are provided on the surface where the second limiting ring 6 of the straight handle 2 contacts the limiting ring 7 of the sliding sleeve 4, and two positioning protrusions 9 which can be interference-engaged with the two positioning grooves 8 are provided on the limiting ring 7 of the sliding sleeve 4.

[0031] A smooth transition structure is provided on the front end surface of the sliding sleeve 4 to prevent it from causing damage to healthy tissues.

[0032] Instructions for use: When the scimitar part 1 needs to be inserted into the surgical site, let the sleeve 4 slide forward to cover the scimitar part 1 and then insert it; when the scimitar needs to cut the tendon sheath and tendon joints, slide the sleeve 4 backward to expose the scimitar part 1 and then perform the operation. At this time, the rear end of the sleeve 4 is engaged with the second limit ring 6 through the engaging device to fix the sleeve 4 to prevent it from sliding forward and affecting the operation; when the operation is completed, slide the sleeve 4 forward to cover the scimitar part 1 and then withdraw the scimitar part.

[0033] Specific surgical procedures:

[0034] First, the skin above the tendon sheath muscle joint is cut open, the skin is stretched open and fixed, and the front end of the stenosis tenosynovitis cutter covered by the sliding sleeve is inserted into the stretched skin. At this time, the curved blade part is well covered and protected by the sliding sleeve, so that the curved blade will not cause accidental injury to the healthy tissue passing through. Then the sliding sleeve is pulled backward to expose the part where the blade edge of the curved blade part is located, and the blade edge of the curved blade part is used to gradually cut the group-shaped tendon sheath muscle joint into strips and cut it open. At this time, because the front end of the stenosis tenosynovitis cutter is a curved blade structure with the blade edge on the inside, it can well avoid the situation that the healthy tissue in front of the blade head is easily stabbed by mistake when the straight oblique scalpel is used before, and the knife is inserted and cut backwards once, and then the curved blade is withdrawn to prevent accidental injury to the healthy tissue passing through. After that, the curved blade can also be well stored to prevent cutting people.

[0035] The stenosis tenosynovitis cutting knife of the utility model has an ingenious structure, because the front end of the cutting knife is a curved blade part, and the cutting edge is on the inner side, thereby effectively avoiding the problem that the healthy tissue in front of the blade head is easily injured by mistake when the straight oblique-blade scalpel is used before, and the healthy tissue in front of the blade head is easily injured when the blade is advanced and cut backwards once and then advanced forward again for cutting; at the same time, the curved blade part is well shielded and protected by the sliding sleeve when the blade is advanced, so that the curved blade part will not cause accidental injury to the healthy skin where the curved blade passes; after the cutting is completed, the curved blade part is again covered by the sliding sleeve when withdrawing, so that the curved blade part can avoid accidentally injuring the healthy tissue when withdrawing, and then because of the protection of the sliding sleeve, the curved blade can also be well stored to prevent cutting people, thereby, by designing the blade head into a curved blade structure and allowing the curved blade part to be covered when entering and exiting, and at the same time, the curved blade part will not be affected by the sliding sleeve during the operation, so that the fault tolerance rate of the operation process is greatly improved, unnecessary accidental injury is greatly avoided, and the doctor's operation process can be faster and simpler, the patient's pain is greatly reduced, and the wound is easier to recover. The utility model is particularly suitable for use in the operation of stenosis tenosynovitis, has strong practicality, and is worthy of promotion.

[0036] The utility model of the stenosis tenosynovitis cutting knife has an ingenious structure. During cutting, the rear end portion of the curved blade is wrapped and protected by the sliding sleeve, so that the curved blade will not cause damage to the skin behind it. After the cutting is completed, the curved blade is withdrawn and the sliding sleeve will cover the curved blade again, so that the curved blade can be well stored to prevent cutting people. It is highly practical and worthy of promotion.

[0037] The present invention is not limited to the above-mentioned specific implementation modes, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A stenosis tenosynovitis cutting knife, characterized in that: It includes a scimitar portion located at the front end and a straight handle portion connected to the rear end of the scimitar portion, the inner side of the front end of the scimitar portion is provided with a cutting edge for cutting the tendon sheath joint, and a sliding sleeve is also provided on the straight handle portion, the front end of the straight handle portion is provided with a first limiting ring, and the tail portion is provided with a second limiting ring, and the tail portion of the sliding sleeve is provided with a limiting ring that can cooperate with the first limiting ring and the second limiting ring, so that the sliding sleeve can slide forward to cover the scimitar portion or slide backward to expose the scimitar portion without slipping off the straight handle portion; a locking device is also provided between the second limiting ring of the straight handle portion and the limiting ring of the sliding sleeve.

2. The stenosis tenosynovitis cutting knife according to claim 1, characterized in that: The second limiting ring is detachably fixed to the tail of the straight handle by bolt fixing, rubber clamp fixing, or thread matching fixing, so as to facilitate the assembly of the sliding sleeve.

3. The stenosis tenosynovitis cutting knife according to claim 1, characterized in that: The engaging device comprises a positioning groove on the surface where the second limiting ring of the straight handle contacts the limiting ring of the sliding sleeve, and a positioning protrusion on the limiting ring of the sliding sleeve which can be interference-engaged with the positioning groove.

4. The stenotic tenosynovitis cutting knife according to claim 3, characterized in that: Two symmetrically arranged positioning grooves are provided on the surface where the second limiting ring of the straight handle contacts the limiting ring of the sliding sleeve, and two positioning protrusions which can respectively engage with the two positioning grooves in an interference fit are provided on the limiting ring of the sliding sleeve.

5. The stenosis tenosynovitis cutting knife according to claim 1, characterized in that: A smooth transition structure is provided on the end surface of the front end of the sliding sleeve to prevent it from causing damage to healthy tissues.

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