Scalpel for apical incision

Abstract

The scalpel for apical incision provided by the present invention comprises: a handle having an axial through hole running through the axial direction thereof; a knife holder arranged at one end of the handle, and having a through hole connected to the axial through hole at the center of the knife holder; the end of the knife holder away from the handle having four knife heads, and the projections of the four knife heads in the radial direction of the handle are distributed in a "cross" shape, and the knife heads face away from the handle and are inclined inwardly; a blade detachably connected to the knife head, and the tips of the four blades enclose an annular space suitable for the guide wire to pass through, and the side of the blade away from the guide wire has a blade, and the blade is inclined inwardly relative to the knife head. In the scalpel of the present invention, the guide wire is inserted into the designated position through the apex, and the guide wire here plays a guiding role; the guide wire is passed through the axial through hole, so that the scalpel is inserted into the apex along the direction of the guide wire, and the size of the cross incision is controlled by the insertion depth of the scalpel; the above four blades can complete the cross incision of the apex at one time, and the shape of the cross incision is standardized.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, and in particular to a scalpel used for apical incision. Background Art

[0002] Artificial valves are artificial organs that can be implanted in the heart to replace the original valves of the human body, allowing blood to flow in one direction and having the function of natural heart valves. When the heart valve disease is serious and valve separation surgery or repair surgery cannot be used to restore or improve the valve function, artificial heart valve replacement surgery must be used.

[0003] There are two most commonly used approaches for transcatheter interventional heart valve replacement: transfemoral and transapical. When limited by the size, calcification and curvature of peripheral blood vessels, doctors prefer the transapical approach. In transapical valve replacement, doctors need to make a cross-shaped incision at the apex of the patient's heart to insert the valve delivery system into the original valve position of the heart through the apical incision.

[0004] Currently, doctors use ordinary scalpels to make cross cuts during surgery. This process cannot be completed in one go, and requires four cuts in the cross direction to complete the cross incision. The operation is more complicated, and the cross incision is irregular, causing multiple trauma to the heart. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the prior art that when making a cross incision on the apex of the heart, the direction of the scalpel needs to be changed multiple times, the operation is complicated, the cross incision is irregular, and multiple traumas to the heart are easily caused, thereby providing a scalpel for apex incision.

[0006] In order to solve the above technical problems, the present invention provides a surgical knife for apical incision, comprising:

[0007] The knife handle has an axial hole running through the axial direction thereof;

[0008] A tool holder is arranged at one end of the tool handle, and a through hole connected to the shaft hole is provided at the center of the tool holder; the end of the tool holder away from the tool handle has four tool heads, and the projections of the four tool heads in the radial direction of the tool handle are distributed in a "cross" shape, and the tool heads face away from the tool handle and are inclined inwards;

[0009] The blades are detachably connected to the blade head, the tips of the four blades enclose an annular space suitable for the guide wire to pass through, and the blades have a cutting edge on the side away from the guide wire, and the cutting edge is inclined inwardly relative to the blade head.

[0010] As a preferred embodiment, a guide shaft extends from one end of the knife handle toward the knife holder, and the guide shaft has a guide wire cavity connected to the shaft hole; the guide shaft extends to the tip of the blade and abuts against the tip of the blade.

[0011] As a preferred solution, the tip of the blade has an inclined surface, and the inclined surface is tangentially in contact with the guide shaft.

[0012] As a preferred solution, one side surface of the cutter head has a protrusion arranged along its length direction, and the blade has a slot suitable for sleeve engagement with the protrusion.

[0013] As a preferred solution, the thickness of the protrusion is greater than the thickness of the blade.

[0014] As a preferred solution, the inner and outer sides of the protrusion are respectively provided with rectangular grooves, and the blade is provided with a clamping portion suitable for extending into the rectangular grooves.

[0015] As a preferred solution, the length of the protrusion is greater than one third of the length of the blade.

[0016] As a preferred solution, the tool holder comprises:

[0017] A fixed plate, detachably connected to the knife handle, wherein the radial edge of the fixed plate has four knife beams extending outward, and the angle between two adjacent knife beams is 90°;

[0018] The cutter head has one end connected to the cutter beam and the other end inclined toward the fixed disk.

[0019] As a preferred solution, the angle between the cutter head and the cutter beam is 60°.

[0020] As a preferred solution, the outer wall of the knife handle has a plurality of evenly distributed arc-shaped edges.

[0021] The technical solution of the present invention has the following advantages:

[0022] 1. The scalpel for apical incision provided by the present invention has the following steps: before the cross incision is made at the apex, a guide wire is inserted through the apex to a designated position, where the guide wire plays a guiding role; the guide wire is passed through the through-axis hole, and the scalpel is inserted into the apex along the direction of the guide wire, and the size of the cross incision is controlled by the insertion depth of the scalpel; the four blades on the above scalpel can complete the cross incision of the apex at one time, and the shape of the cross incision is standardized.

[0023] 2. The scalpel for apical incision provided by the present invention has a guide shaft that guides during the process of inserting the guide wire into the guide wire cavity, making the relative position between the guide wire and the blade more accurate; during the apical cross incision, the tip of the blade abuts against the guide shaft to prevent the blade from shifting due to cutting resistance.

[0024] 3. In the surgical knife for apical incision provided by the present invention, the thickness of the protrusion is greater than the thickness of the blade, that is, the protrusion can protrude from the connecting surface of the blade, and the protrusion plays a role in limiting the cutting depth of the blade.

[0025] 4. The rectangular groove on the protrusion of the surgical knife for apical incision provided by the present invention can limit the blade and prevent the blade from deviating to the left or right.

[0026] 5. In the surgical knife for apical incision provided by the present invention, the length of the protrusion is greater than one third of the length of the blade, so that the connection of the blade is more secure.

[0027] 6. The scalpel for apical incision provided by the present invention is fixed in a "cross" structure, making the entire scalpel lighter.

[0028] 7. The scalpel for apical incision provided by the present invention has a curved edge design, which is convenient for doctors to hold and has an anti-slip effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 The present invention provides a three-dimensional structural schematic diagram of a surgical knife used for apical incision.

[0031] Figure 2 A cross-sectional view of the handle.

[0032] Figure 3 Schematic diagram of the three-dimensional structure of the tool holder Figure 1 .

[0033] Figure 4 Schematic diagram of the three-dimensional structure of the tool holder Figure 2 .

[0034] Figure 5 for Figure 4 Magnified view of area A.

[0035] Figure 6 It is a schematic diagram of the three-dimensional structure of the blade.

[0036] Description of reference numerals:

[0037] 1. Knife handle; 2. Knife holder; 3. Blade; 4. Guide shaft; 5. Guide wire cavity; 6. Fixed plate; 7. Knife beam; 8. Knife head; 9. Through hole; 10. Connecting hole; 11. Connecting column; 12. Protrusion; 13. First groove; 14. Second groove; 15. First clamping part; 16. Second clamping part; 17. Clamping groove; 18. Blade; 19. Inclined surface. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0042] like Figure 1 As shown, the surgical knife for apical incision provided by the present invention comprises: a knife handle 1 and a knife holder 2 connected to the knife handle 1 , and a blade 3 is detachably connected to the knife holder 2 .

[0043] like Figure 2As shown, the shank 1 is a hexagonal prism structure with an axial through-hole running through it in the interior; one end of the shank 1 has a coaxially arranged connecting column 11, and the cross-sectional dimension of the connecting column 11 is smaller than the cross-sectional dimension of the shank 1; a guide shaft 4 is connected to the through-hole, and the guide shaft 4 has a guide wire cavity 5 running through it in the axial direction; one end of the guide shaft 4 is flush with the end of the shank 1, and the other end extends out of the through-hole.

[0044] like Figure 3 , Figure 4 As shown, the tool holder 2 is an integrally formed structure, including a fixed disk 6, a knife beam 7 and a knife head 8; the fixed disk 6 has a through hole 9 at its center, and one end of the fixed disk 6 has a connecting hole 10 coaxially arranged with the through hole 9, and the depth of the connecting hole 10 is equal to the length of the connecting column 11; the tool holder 2 is connected to the connecting column 11 of the tool handle 1 through the connecting hole 10, the through hole 9 is coaxially connected with the through-shaft hole of the tool handle 1, and the guide shaft 4 extends from the through hole 9. There are four knife beams 7, which are distributed at intervals around the radial edge of the fixed disk 6, and the angle between two adjacent knife beams 7 is 90°, that is, the four knife beams 7 are distributed in a "cross" shape; one end of the knife beam 7 is connected to the edge of the fixed disk 6, and the other end extends outward along the radial extension direction of the fixed disk 6. There are four cutter heads 8, which are respectively connected to the corresponding cutter beams 7; the cutter head 8 is connected to the end of the cutter beam 7 away from the fixed disk 6, the free end of the cutter head 8 is inclined toward the center of the fixed disk 6, and the angles between the cutter head 8 and the corresponding cutter beam 7 are both 60°; the thickness of the cutter head 8 is less than the thickness of the cutter beam 7, and the cutter head 8 has a first side surface coplanar with one side surface of the cutter beam 7, and also has a second side surface parallel to the other side surface of the cutter beam 7.

[0045] like Figure 5 As shown, the second side of the cutter head 8 has a protrusion 12, and the width of the protrusion 12 is equal to the width of the cutter head 8; the two opposite sides of the protrusion 12 respectively have rectangular grooves, and the rectangular grooves have a first groove 13 and a second groove 14 with different depths.

[0046] like Figure 1 , Figure 5As shown, the blade 3 also has a slot 17 that is sleeved with the protrusion 12, and the inner wall of the slot 17 has a first clamping portion 15 and a second clamping portion 16, the first clamping portion 15 extends into the first groove 13, and the second clamping portion 16 extends into the second groove 14, so as to realize the clamping and fixing of the blade 3 and the cutter head 8; wherein, the length of the protrusion 12 is greater than one-third of the length of the blade 3, the thickness of the protrusion 12 is greater than the thickness of the blade 3, the side of the blade 3 has a blade 18, the blade 18 faces away from the guide shaft 4, and the blade 18 is inclined inwardly relative to the cutter head 8; the tip of the blade 3 has an inclined surface 19 inclined toward the direction of the blade 18, and the blade 3 is tangentially abutted against the outer wall of the guide shaft 4 through the inclined surface 19.

[0047] Working principle:

[0048] Before the cross incision is made at the apex, a guide wire is inserted through the apex to a designated position, where the guide wire acts as a guide; the guide wire is passed through the guide shaft 4, the through hole 9 and the guide wire cavity 5 in sequence, and the doctor holds the knife handle 1 and inserts the scalpel into the apex along the direction of the guide wire, and controls the size of the cross incision by the depth of insertion; the above operation can complete the cross incision of the apex at one time and ensure the regularity of the cross incision.

[0049] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A surgical knife for apical incision, characterized in that: include: The knife handle (1) has an axial hole running through the axial direction thereof; A tool holder (2) is arranged at one end of the tool handle (1), and a through hole (9) connected to the shaft hole is provided at the center of the tool holder (2); the end of the tool holder (2) facing away from the tool handle (1) has four tool heads (8), and the projections of the four tool heads (8) in the radial direction of the tool handle (1) are distributed in a "cross" shape, and the tool heads (8) face away from the tool handle (1) and are inclined inwards; A blade (3) is detachably connected to the blade head (8), the tips of the four blades (3) enclose an annular space suitable for the guide wire to pass through, and the blade (3) has a blade edge (18) on the side facing away from the guide wire, and the blade edge (18) is inclined inwardly relative to the blade head (8); A guide shaft (4) extends from one end of the knife handle (1) facing the knife holder (2), and a guide wire cavity (5) is provided in the guide shaft (4) and communicates with the shaft hole; the guide shaft (4) extends to the tip of the blade (3) and abuts against the tip of the blade (3); A protrusion (12) is provided on one side surface of the cutter head (8) along its length direction, and a slot (17) suitable for sleeve engagement with the protrusion (12) is provided on the blade (3); A fixed plate (6) is detachably connected to the knife handle (1), and the radial edge of the fixed plate (6) is provided with four knife beams (7) extending outward, and the angle between two adjacent knife beams (7) is 90°; The cutter head (8) has one end connected to the cutter beam (7) and the other end inclined toward the fixed plate (6).

2. The surgical knife for apical incision according to claim 1, characterized in that: The tip of the blade (3) is provided with an inclined surface (19), and the inclined surface (19) is tangentially in contact with the guide shaft (4).

3. The surgical knife for apical incision according to claim 1, characterized in that: The thickness of the protrusion (12) is greater than the thickness of the blade (3).

4. The surgical knife for apical incision according to claim 1, characterized in that: The inner and outer sides of the protrusion (12) are respectively provided with rectangular grooves, and the blade (3) is provided with a clamping portion suitable for extending into the rectangular groove.

5. The surgical knife for apical incision according to claim 1, characterized in that: The length of the protrusion (12) is greater than one third of the length of the blade (3).

6. The surgical knife for apical incision according to claim 1, characterized in that: The included angle between the cutter head (8) and the cutter beam (7) is 60°.

7. The surgical knife for apical incision according to any one of claims 1 to 6, characterized in that: The outer wall of the knife handle (1) is provided with a plurality of evenly distributed arc-shaped edges.

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