Medical leaflet knife

Abstract

The utility model discloses a medical leaflet knife, which belongs to the technical field of medical instruments and comprises a knife handle, a knife body and a cavity channel penetrating through the knife handle and the knife body, and the knife body comprises step-shaped blades symmetrically arranged on the same plane on two sides of the cavity channel. And the width of the cutter body is gradually increased from the cutter head part to the tail part of the cutter body. According to the medical leatheroid, an incision can be accurately conducted with a puncture point or an inserted guide wire as the center, the scalpel is attached to the guide wire to conduct undercutting during undercutting, scales are arranged on the outer portion of the cavity channel of the scalpel body, the width and depth of the incision can be accurately mastered, the operation difficulty of an operation is reduced, and the accuracy and efficiency of the operation are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and specifically relates to a medical feather knife. Background Art

[0002] In some minimally invasive surgeries in clinical medicine, it is often necessary to puncture and then incise the skin and soft tissues, and then insert the next surgical instrument, such as inserting an interventional operation instrument such as a vascular stapler after a vascular sheath operation; percutaneous pedicle screw fixation surgery also incises the skin and inserts a nail inserter after successful puncture; in endoscopic spine surgery, the skin and tissues are incised and a guide rod is inserted after the guide needle is inserted; in resuscitative aortic balloon occlusion surgery, it is also necessary to incise centered on the wire insertion point to facilitate the entry of the balloon occlusion device into the blood vessel, etc. Precise incisions are required in many surgeries, but there are some problems with current scalpels. For example, when incising, it is impossible to center on the puncture point. Due to the fact that instruments such as inserted guide wires are too thin, the scalpel cannot precisely incise the incision centered on the puncture point; moreover, the existing scalpel cannot cut along the guide wire, which brings great difficulties to the operation of doctors and reduces the surgical efficiency; even worse, using an ordinary scalpel will scratch the guide wire. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a medical feather knife that can precisely make an incision centered on the puncture point, and can also ensure cutting along the guide wire or guide needle and control the cutting depth.

[0004] To solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A medical feather knife includes a knife handle, a blade body, and a cavity penetrating through the knife handle and the blade body. The blade body includes stepped blades symmetrically arranged on both sides of the cavity in the same plane.

[0006] The further improvement of the technical solution of the utility model lies in that: the width of the blade body gradually increases from the knife head part until the tail part of the blade body.

[0007] The further improvement of the technical solution of the utility model lies in that: scales corresponding to the length of the knife edge and the cutting depth are arranged perpendicular to the cavity in the blade body part.

[0008] The further improvement of the technical solution of the utility model lies in that: the blade of the blade body includes a stepped blade edge with a plurality of connected inclined parts and flat parts. The inclination angle of the inclined part is greater than that of the flat part and the length of the inclined part is less than that of the flat part. The inclined part and the flat part are connected by an arc transition.

[0009] The further improvement of the technical solution of the present utility model lies in that: starting from the cutter head, there is an inclined part and then a gentle part. The vertical length of the connected inclined part and gentle part in each of the first to fourth orders is 1.5 mm - 2.0 mm, and the vertical length of the connected inclined part and gentle part from the fifth order to the last order is 1.0 mm.

[0010] The further improvement of the technical solution of the present utility model lies in that: the scales on the cutter body respectively correspond to the cutting edge lengths of 2, 4, 5, 7, 10, 12, 14, 16, 18, 21F for cutting.

[0011] The further improvement of the technical solution of the present utility model lies in that: the medical pinnate knife is of an integrated structure.

[0012] The further improvement of the technical solution of the present utility model lies in that: the medical pinnate knife is of a split structure, and the handle and the cutter body are connected in a detachable manner. After connection, the cavities in the handle and the cutter body are aligned.

[0013] The further improvement of the technical solution of the present utility model lies in that: a key platform extending forward and backward is provided on the handle neck of the handle, and a U-shaped cutter groove is provided in the middle of the cutter body. The cutter body is installed on the handle through the cooperation of the key platform and the U-shaped cutter groove.

[0014] The further improvement of the technical solution of the present utility model lies in that: installation card slots are provided on both sides of the key platform along its length direction.

[0015] Due to the adoption of the above technical solution, the technical progress achieved by the present utility model is:

[0016] The medical pinnate knife provided by the present application can accurately make an incision centered on the puncture point or the inserted guide wire, will not cut out a false passage, will not scratch the guide wire, the incision is symmetrical, and when cutting downward, the scalpel fits the guide wire or guide needle for downward cutting. There are scales on the outside of the cavity of the cutter body, and the width and depth of the incision can be accurately mastered, reducing the operation difficulty of the operation and improving the operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the medical pinnate knife of the present utility model;

[0018] Figure 2 is Figure 1 the enlarged view of part A in

[0019] Figure 3 is a schematic diagram of the handle of the medical pinnate knife in Embodiment 2;

[0020] Figure 4 is a schematic diagram of the cutter body of the medical pinnate knife in Embodiment 2;

[0021] Wherein, 1, cavity; 2, cutter body; 3, handle; 2-1, inclined part; 2-2, gentle part. Detailed implementation manners

[0022] The present utility model will be further described in detail below in conjunction with embodiments:

[0023] Embodiment 1

[0024] As shown in Figure 1 , a medical pinnate knife includes a knife handle 3, a knife body 2, and a cavity 1 penetrating through the knife handle 3 and the knife body 2. The knife body 2 includes stepped blades symmetrically arranged on the same plane on both sides of the cavity 1. A guide wire or a guide needle can penetrate into the cavity 1. The width of the knife body 2 gradually increases from the knife head part until the tail part of the knife body 2. The blades of the knife body 2 include a plurality of connected stepped cutting edges of inclined parts 2-1 and flat parts 2-2. The inclination angle of the inclined part 2-1 is greater than that of the flat part 2-2, and the length of the inclined part 2-1 is less than that of the flat part 2-2. The inclined part 2-1 and the flat part 2-2 are connected by an arc transition. The vertical length of each connected inclined part 2-1 and flat part 2-2 is 1.5 mm. Starting from the knife head, it is the inclined part 2-1 and then the flat part 2-2. The vertical length from the knife head to the tail of the first-stage flat part 2-2 is 2.0 mm.

[0025] Scales are provided on the outside of the cavity 1 of the knife body 2. Each scale line of the scales traverses the width part of the knife body, which can facilitate accurately grasping the cutting depth and the length of the incision. For example, the first scale line corresponds to 4F and 2 mm, that is, at the first scale line, the length of the incision corresponds to the circumference of a 4F tube, and the cutting depth is 2 mm; the second scale is set at the end of the second-stage flat part 2-2, corresponding to 6F and 3.5 mm, that is, at the second scale, the length of the incision corresponds to the circumference of a 6F tube, and the depth is 3.5 mm. Similarly, the third scale is 8F and 5 mm, and so on. The unit F is Fr, which is the unit of a catheter. 3F = 1 mm in circumference, and the circumference = 3.14 × diameter, so the diameter of 1F = 0.33 mm.

[0026] Similarly, different specifications of pinnate knives can be set. According to actual needs, pinnate knives corresponding to different cutting depths and incision lengths can be designed.

[0027] The knife handle 3 is cylindrical or flat, and patterns are provided thereon, which can increase the friction between the fingers and the knife handle and prevent slipping. An arc-shaped edge is provided at the top end of the cavity of the pinnate knife, but it is not a sharp edge, which is used to smoothly break the skin and can prevent accidentally stabbing the operator (surgeon) to a certain extent.

[0028] The medical pinnate knife is of an integrated structure

[0029] Embodiment 2

[0030] This embodiment has basically the same structure as Embodiment 1. The only difference is that this embodiment is designed as a split structure, and the handle 3 and the blade 2 of the split structure are detachably connected. After connection, the channels in the handle 3 and the blade 2 are aligned.

[0031] On the neck of the handle 3 of the medical feather knife, there is a key platform 4 extending forward and backward. The key platform 4 and the diameter of the handle are stepped. There is a U-shaped knife groove in the middle of the blade 2. The blade 2 is installed on the handle 3 by the cooperation of the key platform 4 and the U-shaped knife groove. On both sides of the key platform 4, there are installation card slots 5 along its length direction. After the blade 2 is installed on the handle 3, the tail of the blade 2 abuts against the end of the neck of the handle 3.

[0032] Usage method:

[0033] For example, during resuscitative aortic balloon occlusion, after the doctor punctures the femoral artery of the patient and the guide wire enters the human body, the external guide wire is inserted into the channel 1 of the feather knife. The feather knife reaches the human epidermis along the guide wire, and the feather knife is pushed to cut into the human body. The cutting depth is selected according to needs, and the incision length is selected according to the diameter of the inserted pipeline in the body.

[0034] Similarly, the usage methods of vascular sheath surgery and percutaneous pedicle screw fixation surgery are similar. Using the feather knife of this application, an incision can be accurately made centered on the guide wire or guide needle. When cutting down, the scalpel completely adheres to the guide wire or guide needle, and the incision is regular. At the same time, there are scales on the feather knife, which is convenient for selecting the cutting depth and the length of the incision.

Claims

1. A medical feather blade knife, characterized in that: It comprises a knife handle (3), a knife body (2), and a cavity (1) that passes through the knife handle (3) and the knife body (2), wherein the knife body (2) comprises stepped blades symmetrically arranged on the same plane on both sides of the cavity (1).

2. A medical feather blade knife according to claim 1, characterized in that: The width of the blade body (2) gradually increases from the blade head portion to the blade tail portion of the blade body (2).

3. A medical feather blade knife according to claim 1, characterized in that: Scales corresponding to the length of the blade and the cutting depth are arranged on the blade body (2) perpendicular to the cavity (1).

4. A medical feather blade knife according to claim 2, characterized in that: The blade of the blade body (2) comprises a plurality of connected stepped blade edges of inclined portions (2-1) and flat portions (2-2); the inclined portion (2-1) has a greater inclination angle than the flat portion (2-2) and the length of the inclined portion (2-1) is less than the flat portion (2-2); the inclined portion (2-1) and the flat portion (2-2) are connected by an arc transition.

5. A medical feather blade knife according to claim 4, characterized in that: Starting from the blade tip, there is an inclined portion (2-1) and then a flat portion (2-2). The vertical length of the inclined portion (2-1) and the flat portion (2-2) connected in each step from the first step to the fourth step is 1.5 mm to 2.0 mm, and the vertical length of the inclined portion (2-1) and the flat portion (2-2) connected in each step from the fifth step to the last step is 1.0 mm.

6. A medical feather blade knife according to claim 5, characterized in that: The scales on the knife body (2) correspond to the lengths of the cutting edges of 2, 4, 5, 7, 10, 12, 14, 16, 18, and 21F respectively.

7. The medical feather blade knife according to claim 1, characterized in that: The medical feather blade knife is an integrated structure.

8. The medical feather blade knife according to claim 1, characterized in that: The medical feather blade knife is a split structure, and the knife handle (3) and the knife body (2) are connected in a detachable manner, and after the connection, the cavities in the knife handle (3) and the knife body (2) are aligned.

9. A medical feather blade knife according to claim 8, characterized in that: The handle neck of the knife handle (3) is provided with a key platform (4) extending forward and backward, the middle of the knife body (2) is provided with a U-shaped knife groove, and the knife body (2) is mounted on the knife handle (3) through the key platform (4) and the U-shaped knife groove.

10. The medical feather blade knife according to claim 9, characterized in that: Card mounting slots (5) are provided on both sides of the key platform (4) along its length direction.

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