CN219661838U - Tendon sheath detecting knife - Google Patents

Abstract

The utility model provides a tendon sheath probing knife which is used for minimally invasive surgery of stenosed tenosynovitis and relates to the technical field of surgical tools, and the minimally invasive surgery tool comprises a knife handle and a knife body, wherein the knife body comprises a neck part and a head part which are sequentially connected to the front end of the knife handle, the neck part is curved in an arc shape, the head part extends in a linear shape along the curved direction of the neck part, a cutting edge is arranged at the joint of the head part and the neck part, the edge part of the cutting edge is arranged at an obtuse angle with the front end face of the head part, the rear edge of the cutting edge is a blunt surface, and the joint of the rear edge and the neck part is free of an edge angle.

Description

Tendon sheath detecting knife

Technical Field

The utility model relates to the technical field of surgical tools, in particular to a tendon sheath probing knife.

Background

For grade III-IV stenosed tenosynovitis, conservative treatment is easy to relapse, and tenotomy is required. Open tenosynovial incision is a surgical incision made with a surgical knife, exposing the narrow fibrous sheath, which is then cut. The surgical wound is relatively large, the incision needs to be sutured, the defect of large open surgical wound is overcome by adopting a percutaneous minimally invasive loosening surgical mode such as a small needle knife, a hook knife and the like, but the risk of injury to tendons, blood vessels, nerves and the like is caused due to percutaneous blind incision, so that the tendon sheath probing knife is provided.

Disclosure of Invention

The utility model aims to solve the problems of large trauma and high risk in tenosynovial incision and provides a tenosynovial probe cutter.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a tendon sheath cutter, includes handle of a knife and cutter body, the cutter body is including connecting gradually neck and the head at the handle of a knife front end, the neck is the arc crooked, the head is the linear type along the crooked direction of neck and extends, the junction of head and neck is equipped with the cutting edge, the cutting edge's of cutting edge portion is the obtuse angle setting with the preceding terminal surface of head, the trailing edge of cutting edge is blunt face, and trailing edge and neck junction do not have the cutting edge angle.

Preferably, the neck, head and blade are integrally formed.

Preferably, the neck is curved in a 20 ° arc.

Preferably, the front end of the blade part is used as an endpoint to tilt upwards, and a 20-degree slope is formed on the head part.

Preferably, the handle, neck, head and blade are made of stainless steel material.

Preferably, the tip of the head is in a rounded cone shape.

Preferably, the width of the knife handle gradually increases from the front end to the tail end.

Preferably, the handle is symmetrically provided with a plurality of anti-skid patterns, and the anti-skid patterns are close to the front end of the handle.

Compared with the prior art, the utility model has the advantages and positive effects that:

the tendon sheath probing knife provided by the utility model is used for treating stenosed tenosynovitis, and because the incision is small, no suture is needed, the defect of large open operation wound is overcome, the injuries of tendons, blood vessels, nerves and the like possibly occurring in percutaneous blind cutting are avoided, the operation risk is reduced, and meanwhile, the tendon sheath probing knife is convenient to use, simple to operate, small in wound and high in safety.

Drawings

Fig. 1 is a schematic structural view of a tendon sheath probe according to the present utility model;

fig. 2 is a schematic view of a cutter body structure of a tendon sheath detecting cutter according to the present utility model;

fig. 3 is a schematic diagram showing an operation of a tendon sheath probing cutter for treating tenosynovitis stenosed in thumb tendon according to the present utility model.

Legend description: 1. a knife handle; 11. anti-skid lines; 2. a neck; 3. a head; 4. a blade; 41. a blade section; 42. and a trailing edge.

Detailed Description

In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be rendered by reference to the appended drawings and examples. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced otherwise than as described herein, and therefore the present utility model is not limited to the specific embodiments of the disclosure that follow.

1-3, a tendon sheath cutter comprises a cutter handle 1 and a cutter body, wherein the cutter body comprises a neck 2 and a head 3 which are sequentially connected to the front end of the cutter handle 1, the neck 2 is curved in an arc shape, the head 3 extends in a linear shape along the curved direction of the neck 2, a cutting edge 4 is arranged at the joint of the head 3 and the neck 2, an obtuse angle is formed between the edge 41 of the cutting edge 4 and the front end surface of the head 3, the rear edge 42 of the cutting edge 4 is an obtuse angle, and the joint of the rear edge 42 and the neck 2 has no cutting edge angle.

The width of handle of a knife 1 from front end to tail end increases gradually, and wherein handle of a knife 1 is long 100mm, and the person of facilitating the use holds to prevent at the hand to drop, a plurality of anti-skidding lines 11 have been seted up to the symmetry on handle of a knife 1, and a plurality of anti-skidding lines 11 are close to the tip position of handle of a knife 1, and anti-skidding line 11 on handle of a knife 1 prevents that the tendon sheath from visiting the cutter and taking place to overturn, holds effectually.

The neck 2, the head 3 and the blade 4 are integrally formed, the neck 2 is bent in a 20-degree arc shape, the diameter of the neck 2 is 2.5mm, the length of the neck is 10mm, and the neck 2 is bent in a curve shape, so that the tendon sheath probing cutter only enters the working positions of the neck 2, the head 3, the blade 41 and the rear edge 42, the surgical incision is reduced, the wound is reduced, the surgical risk is reduced, and the safety is good; wherein the knife handle 1, the neck 2, the head 3 and the blade 4 are made of stainless steel materials;

wherein the diameter of the head 3 is 1.8mm, the length is 6mm, the tip is round and blunt, and the head 3 is used for probing and inserting the tendon sheath, so that the resistance of the tendon sheath probing cutter to insert the tendon sheath is reduced.

The front end of the blade part 41 is used as an endpoint to tilt upwards, a 20-degree slope is formed on the head part 3, the length of the blade part 41 is 8mm, the blade part 41 is used for cutting a fiber sheath, and the rear edge 42 is an unsharpened surface (i.e. a blunt surface) so as to avoid damaging surrounding tissues in the back drawing process of the detection knife.

In the operation of tenosynovitis stenosis of thumb, as shown in fig. 3, after skin disinfection and local anesthesia, a small incision of 3-4 mm is made at the proximal end of a narrow fibrous sheath (the proximal end of metacarpophalangeal transverse vein), the head 3 of a tendon sheath detection knife is inserted, the head 3 of the tendon sheath detection knife is used for probing the narrow fibrous sheath (the hand feeling has larger resistance), then the head 3 of the tendon sheath detection knife is inserted into the narrow fibrous sheath in a homeotropic manner, the blade is upwards inserted forward and the narrow fibrous sheath is picked and cut by the blade 41, the fibrous sheath is gradually cut by the blade 41 in the insertion process until the cutting resistance suddenly disappears, and then the finger is bent and stretched, if the finger movement is flexible, the narrow fibrous sheath is proved to be completely loosened, the tendon sheath detection knife is taken out, and the small incision is wrapped by using a sterile dressing, so that the operation is completed.

The present utility model is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present utility model without departing from the technical content of the present utility model still belong to the protection scope of the technical solution of the present utility model.

Claims (8)

1. The utility model provides a tendon sheath surveys cutter, includes handle of a knife (1) and cutter body, its characterized in that: the utility model provides a cutter body is including connecting gradually neck (2) and head (3) at handle of a knife (1) front end, neck (2) are the arc bending, head (3) are the linear type along the crooked direction of neck (2) and extend, the junction of head (3) and neck (2) is equipped with cutting edge (4), the cutting edge (41) of cutting edge (4) are the obtuse angle setting with the preceding terminal surface of head (3), trailing edge (42) of cutting edge (4) are blunt face, and trailing edge (42) do not have the cutting edge with the junction of neck (2).

2. Tendon sheath probe as claimed in claim 1, characterized in that the neck (2), head (3) and blade (4) are integrally formed.

3. Tendon sheath probe as claimed in claim 1, characterized in that the neck (2) is curved in a 20 ° arc.

4. Tendon sheath probe as claimed in claim 1, characterized in that the blade (41) is turned up with its front end as an end point, forming a 20 ° slope in the head (3).

5. Tendon sheath probe according to claim 1, characterized in that the shank (1), neck (2), head (3) and blade (4) are made of stainless steel material.

6. Tendon sheath probe as claimed in claim 1, characterized in that the tip of the head (3) is rounded and tapered.

7. Tendon sheath probe as claimed in claim 1, characterized in that the width of the shank (1) increases gradually from the leading end to the trailing end.

8. Tendon sheath probe knife according to claim 1, characterized in that the knife handle (1) is symmetrically provided with a plurality of anti-skid patterns (11), and the anti-skid patterns (11) are close to the front end position of the knife handle (1).