Special knife for scar minimally invasive surgery

Abstract

The utility model relates to the field of medical instruments, in particular to a knife special for a scar minimally invasive surgery, which aims to solve the problems that after a deep burn wound heals, scar fibers are contracted to form strip-shaped tissues, knee joint straightening is limited due to longitudinal traction, an existing needle knife is thinner and generally 0.5-1mm, scars are often thicker and poor in cutting effect, the existing blade width is widened to 2mm-4mm, the fibers are transversely cut off, and the existing needle knife cannot be damaged. According to the knife special for the scar minimally invasive surgery, cut scar fibers grow and are connected again, the cut scar fibers are longer compared with those before the scar fibers are cut off, due to the fact that a blade is thin, the separation degree of the cut fibers is small, and the increase of the total length is small after the fibers grow and are connected again, the knife special for the scar minimally invasive surgery comprises a slender knife body, and a knife head is arranged at one end of the knife body. The end of the scalpel head is provided with a scalpel edge arranged in the width direction of the scalpel body, and the thickness of the scalpel body in the direction perpendicular to the width direction of the scalpel edge is 2-5 mm, so that after fibers are cut off by the scalpel edge, the scalpel body behind the scalpel head can open the fibers towards the two sides along with the depth of the scalpel, and after the fibers grow again, the total length of the fibers is greatly increased.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a special knife for minimally invasive scar surgery. Background Art

[0002] Scars are formed after wound healing. The traction of scar fibers causes greater tension in local soft tissues, especially those located in joints. The traction of scar tissue will affect normal joint movement and even cause scar contracture deformity. At this time, the treatment plan is to perform scar release surgery on that area. In the 1990s, the needle knife was developed by combining Western medicine theory with traditional Chinese medicine acupuncture. It is used to penetrate into the human body to push aside muscle fibers, or to penetrate into thinner areas to cut fibers and make them grow again.

[0003] Especially for scars caused by burns, Figure 3 For example, Figure 3 The popliteal fossa is located at the back of the human knee joint. When the deep burn wound in this area heals, the scar tissue is tough and the scar fibers contract to form cord-like tissue. The longitudinal traction causes the knee joint to be restricted in extension. To address this problem, the treatment plan is to pierce the scar tissue under the skin with a scalpel and cut the fibers horizontally ( Figure 3 The thick horizontal line in the middle is the line for the knife position), while the existing needle knife is thinner, generally 0.5mm~1mm, and the scar is often thicker, and the cutting effect is poor.

[0004] CN201223429Y proposes a flat blade, based on the principle of needle knife, the blade width is widened to 2mm~4mm, so that it can be used as Figure 4 As shown, the fibers are cut transversely, and the scar fibers grow and connect again after cutting, becoming longer than before cutting.

[0005] Regarding the above-mentioned flat-edged blade, the inventor found in actual use that the use of this blade can indeed alleviate the problem of scar contracture to a certain extent, but to completely solve it, it often requires multiple surgeries and multiple cuts on the same part, causing great pain to the patient.

[0006] After analyzing the reasons, it was found that because the blade is thin (generally less than 0.2mm), the degree of separation of the fibers after cutting is small, and the increase in the total length after regrowth and connection is also small. Utility Model Content

[0007] In order to solve the problem of poor cutting and separating effect of fibers in existing release surgery, the utility model provides a special knife for minimally invasive scar surgery.

[0008] The purpose of the utility model is achieved in the following way: a special knife for scar minimally invasive surgery, including a slender blade body 2, a blade head 1 is arranged at one end of the blade body 2, and the end of the blade head 1 has a blade edge arranged along the width direction of the blade body 2, and the blade body 2 has a thickness T of 2mm~5mm along the direction perpendicular to the blade width.

[0009] As a solution, the blade body 2 and the blade head 1 are an integral structure.

[0010] As a solution, the blade body 2 and the blade head 1 are of a split structure, a slot matching with the blade head 1 is provided at the end of the blade body 2, and the blade body 2 is made of spring steel.

[0011] As a solution, a fixing structure 3 is provided at the other end of the blade body 2, and the fixing structure 3 is one of a handle mounting buckle, a screw, and an integrally formed handle.

[0012] As a solution, the width W of the blade is 1.8 mm to 2.3 mm, the thickness T of the blade body 2 is 2 mm to 2.5 mm, and the total length H of the blade body 2 and the blade head 1 is 10 mm to 25 mm.

[0013] As a solution, the width W of the blade is 3.5 mm to 4.5 mm, the thickness T of the blade body 2 is 4 mm to 5 mm, and the total length H of the blade body 2 and the blade head 1 is 20 mm to 50 mm.

[0014] Compared with the prior art, the utility model increases the thickness of the blade, so that after the fiber is cut by the blade, as the scalpel goes deeper, the blade behind the blade head can be Figure 5 As shown in the figure, the fibers are stretched to both sides, and after regrowth, the total length of the fibers is greatly increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of one of the special knife solutions for scar minimally invasive surgery, in which Figure 1 .1 is the main view, Figure 1 .2 is a top view;

[0016] Figure 2 This is a schematic diagram of the structure of the second special knife solution for scar minimally invasive surgery, in which Figure 2 .1 is the main view, Figure 2 .2 is a top view;

[0017] Figure 3 It is a schematic diagram of the structure of scar formed in the popliteal fossa of the human body;

[0018] Figure 4 Schematic diagram of a conventional flat blade cutting fiber during a release operation, wherein Figure 4 .1 is when just cutting in, Figure 4 .2 To complete the two-row cutting, Figure 4 .3 for the case of growth connection after cutting;

[0019] Figure 5 This is a schematic diagram of the utility model of a special knife for scar minimally invasive surgery to perform a loosening operation and cut fibers, wherein Figure 5 .1 is when just cutting in, Figure 5 .2 To complete the two-row cutting, Figure 5 .3 is when the connection grows after being cut.

[0020] Among them, the blade head 1, the blade body 2, the fixing structure 3, the thickness T, the width W, and the total length H of the blade body and the blade head. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the present utility model, unless otherwise expressly specified and limited, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0023] As attached Figure 1-2 As shown, a special knife for minimally invasive scar surgery includes a slender blade body 2, a blade head 1 is arranged at one end of the blade body 2, and the end of the blade head 1 has a blade edge arranged along the width direction of the blade body 2, and the blade body 2 has a thickness T of 2mm~5mm along the direction perpendicular to the blade width.

[0024] The blade 2 preferably has a rectangular cross section, but may also have a polygonal cross section with upper and lower planes as parallel as possible. A circular cross section is not preferred.

[0025] The blade can be preferably straight, or have an angle of less than 10°, or Figure 2 As shown in , it forms a concave arc shape.

[0026] Compared with the prior art, the present invention increases the thickness of the blade body 2, so that after the fiber is cut by the blade, as the scalpel goes deeper, the blade body 2 behind the blade head 1 can be Figure 5 As shown in the figure, the fibers are stretched to both sides, and after regrowth, the total length of the fibers is greatly increased.

[0027] Furthermore, as a solution, Figure 1 As shown, the blade body 2 and the blade head 1 are an integral structure.

[0028] As another solution, considering the problem of needing to replace the cutter after each operation due to wear, such as Figure 2 As shown, the blade body 2 and the blade head 1 are of a split structure, and a slot matching the blade head 1 is provided at the end of the blade body 2, and preferably, a positioning rod extends from the tail of the blade head 1, and the slot forms a positioning groove matching the positioning rod inward; both sides of the end of the blade body 2 are chamfered or rounded; in this solution, the material of the blade body 2 is preferably spring steel, and the front end opening of the slot is smaller than the thickness of the blade head 1, so that the clamping is completed after deformation and the clamping is stable.

[0029] Furthermore, a fixing structure 3 is provided at the other end of the blade body 2. The fixing structure 3 is Figure 1 The handle mounting buckle in the knife is combined with the handle of the scalpel. Figure 2 A screw in a handle, which is a one-piece handle combined with a screw-mouth handle.

[0030] Based on the above foundation, here are two specific sizes suitable for practical operations:

[0031] 1. For scars of small joints, such as interphalangeal joints and metacarpophalangeal joints: the width W of the blade is 1.8 mm to 2.3 mm, preferably 2 mm; the thickness T of the blade 2 is 2 mm to 2.5 mm, preferably greater than or equal to the width W, and the total length H of the blade 2 and the blade head 1 is 10 mm to 25 mm, preferably 15 mm to 20 mm, and the optimal value is 16 mm. Under the conditions of thickness and width, the total length H should not exceed the maximum value, otherwise there may be a risk of intraoperative fracture.

[0032] 2. For larger joints, such as knee joints and elbow joints: the width W of the blade is 3.5mm~4.5mm, preferably 4mm; the thickness T of the blade 2 is 4mm~5mm, preferably greater than or equal to the width W, and the total length H of the blade 2 and the blade head 1 is 20mm~50mm, preferably 40mm~50mm. Under this thickness and width condition, it will not break, and the total length H should not be less than the minimum value, otherwise it may not meet the use length (scar length).

[0033] The method of using the utility model is as follows: Figure 3 For example, Figure 3It is the popliteal fossa on the back of the human knee joint. When the deep burn wound in this area heals, the scar tissue formed is tough, and the scar fibers contract to form cord-like tissue. Longitudinal traction causes limited extension of the knee joint.

[0034] To solve this problem, the prior art flat blade is as follows Figure 4 As shown, a scalpel is inserted into the subcutaneous tissue. Figure 4 .1 Cut the fibers transversely ( Figure 3 The bold horizontal lines are the cutting positions. The spacing between the lines is 10mm~30mm depending on the size of the joint, scar size and thickness. Figure 4 .2 state, the cut fibers grow and connect again to form Figure 4 .3 state, which is longer than before being cut.

[0035] It should be noted that the state of the fibers in the figure only serves to illustrate the function, and the actual state will be more complicated.

[0036] Using the thickened scar minimally invasive surgery special knife of the utility model, such as Figure 5 As shown, Figure 4 .1 Cut the fibers transversely, Figure 4 .2 After the cutting is completed, the scalpel is withdrawn and the fibers are spread to both sides; Figure 4 .3 After the operation, the fibers grow and reconnect. Compared with thinner blades, the total length of the fibers is longer, so that patients do not need multiple surgeries to achieve the effect of loosening scar contracture.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be regarded as the protection scope of the present invention.

Claims

1. A special knife for minimally invasive scar surgery, comprising a slender blade (2), a blade head (1) being arranged at one end of the blade (2), and a blade edge arranged along the width direction of the blade (2) at the end of the blade head (1), characterized in that: The blade body (2) has a thickness T of 2 mm to 5 mm along a direction perpendicular to the blade width.

2. A special knife for minimally invasive scar surgery as claimed in claim 1, characterized in that: The blade body (2) and the blade head (1) are an integral structure.

3. The scar minimally invasive surgery knife according to claim 1, characterized in that: The blade body (2) and the blade head (1) are of a split structure; a slot matching the blade head (1) is provided at the end of the blade body (2); and the blade body (2) is made of spring steel.

4. The special knife for minimally invasive scar surgery as claimed in claim 1, characterized in that: A fixing structure (3) is provided at the other end of the blade body (2), and the fixing structure (3) is one of a handle mounting buckle, a screw rod, and an integrally formed handle.

5. A special knife for scar minimally invasive surgery as claimed in any one of claims 1 to 4, characterized in that: The width W of the blade is 1.8 mm to 2.3 mm, the thickness T of the blade body (2) is 2 mm to 2.5 mm, and the total length H of the blade body (2) and the blade head (1) is 10 mm to 25 mm.

6. A special knife for minimally invasive scar surgery as claimed in any one of claims 1 to 4, characterized in that: The width W of the blade is 3.5 mm to 4.5 mm, the thickness T of the blade body (2) is 4 mm to 5 mm, and the total length H of the blade body (2) and the blade head (1) is 20 mm to 50 mm.

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