CN220778402U

CN220778402U - Surgical tapping knife

Info

Publication number: CN220778402U
Application number: CN202321987682.0U
Authority: CN
Inventors: 谷凯云; 林茹; 舒强
Original assignee: Binjiang Research Institute Of Zhejiang University; Childrens Hospital of Zhejiang University School of Medicine
Current assignee: Binjiang Research Institute Of Zhejiang University; Childrens Hospital of Zhejiang University School of Medicine
Priority date: 2023-07-26
Filing date: 2023-07-26
Publication date: 2024-04-16
Anticipated expiration: 2033-07-26

Abstract

The utility model provides a surgical tapping knife, and belongs to the technical field of medical appliances. The problems that cardiac tissue scraps easily fall into a cardiac chamber, the cutting surface is often uneven, the circular hole quality is poor and the like are solved. The surgical tapping knife comprises a handle, a knife bar, a knife edge and a base, wherein the handle is provided with a circumferential anti-slip structure, the knife edge is cylindrical, an inner cavity is formed in the knife edge, the knife edge reciprocates along the axial direction of the knife bar, and the knife edge moves towards the base until contacting against a platform and realizing cutting. The utility model has the advantages of flat cutting contour, complete removal of the cut tissue, simple operation, short time and the like.

Description

Surgical tapping knife

Technical Field

The utility model belongs to the technical field of medical instruments, relates to a surgical tapping knife, and in particular relates to a surgical tapping knife for tapping on biological tissues.

Background

With the continuous improvement of medical level, various medical instruments required by operations have developed in a diversified, specialized and refined manner. One of the surgical demands is to cut a circular hole in biological tissue such as the heart of a human body for a subsequent surgical operation. For example, when a heart failure patient is treated by using a ventricular assist device, a circular hole with a diameter matched with that of an inflow tube of the ventricular assist device needs to be cut at a heart implantation position during the implantation of the ventricular assist device so that the inflow tube is inserted into the heart, and the difficulty and quality of the opening process of the circular hole have an important influence on the success or failure of the ventricular assist device implantation operation.

In the past, the doctor directly uses the annular knife to scratch the heart tissue, so that the problems that heart tissue scraps fall in a heart chamber and the like are easy to occur, and the doctor only depends on the strength of the hand of the operator to repeatedly cut, so that the cutting surface is often uneven, and the quality of a round hole is poor. Based on the above situation, it is necessary to provide a tapping knife which simplifies the cutting difficulty and ensures the cutting to be neat.

Disclosure of Invention

The present utility model has been made keeping in mind the above problems occurring in the prior art, and an object of the present utility model is to provide a surgical tapping knife.

The aim of the utility model can be achieved by the following technical scheme: the utility model provides a surgical tapping knife, its characterized in that includes handle, cutter arbor, cutting edge, base, the handle be used for supplying medical personnel to hold, the base have and support and lean on the platform, the cutting edge be cylindric, the cutting edge can follow the axial direction of cutter arbor and do reciprocating motion, the cutting edge to base direction motion until contact support and lean on the platform and realize cutting.

The working principle of the utility model is as follows: firstly, moving the cutting edge to a position close to a handle for standby, during operation, cutting a cross incision on the surface of a tissue needing to be perforated by using a surgical knife, slowly penetrating a precut tissue by a base through a character incision by using the handheld standby perforating knife, moving the cutting edge towards the base after the abutting platform of the base abuts against the surface of the cut tissue, completing cutting after the cutting edge contacts with the abutting platform of the base, and slowly withdrawing the perforating knife to complete perforation operation.

In the surgical tapping knife, the knife bar is provided with the driving thread, the knife edge is provided with the internal thread, the knife edge is in threaded connection with the driving thread, and the knife edge is rotated to reciprocate along the axial direction of the knife bar even if the knife edge is rotated.

In the surgical tapping knife, the length of the driving thread is longer than that of the internal thread of the blade.

In the surgical tapping knife, the knife bar is provided with the sliding platform, the knife edge is sleeved on the periphery of the sliding platform, and the knife edge is in sliding connection with the sliding platform.

In the surgical tapping knife, the blade is provided with an inner cavity.

In the surgical tapping knife, the outer surface of the blade is provided with a circumferential anti-slip structure.

In the surgical tapping knife, the knife bar is provided with a first fastening thread, and the handle is connected and fixed with the knife bar through the first fastening thread.

In the surgical tapping knife, the thread direction of the first fastening thread is opposite to the thread direction of the driving thread.

In the surgical tapping knife, a circumferential anti-slip structure is arranged on the outer surface of the handle, and an annular groove is further formed in the handle.

In the surgical tapping knife, the knife bar is provided with a second fastening thread, and the base is connected and fixed with the knife bar through the second fastening thread.

In the surgical tapping knife, the knife bar is provided with the limiting baffle, and the size of the limiting baffle does not exceed the abutting platform.

Compared with the prior art, the utility model has the advantages of neat tissue cutting outline, good opening cylindricity, complete extraction of cut tissues, simple operation and short time.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic view of the structure of the cutter bar of the present utility model.

Fig. 3 is a schematic cross-sectional structure of the present utility model.

Fig. 4 is a schematic view of the structure of the cutting state of the present utility model.

In the figure, 1, a handle; 2. a cutter bar; 3. a blade; 4. a base; 5. abutting against the platform; 6. driving the screw thread; 7. an internal thread; 8. a sliding platform; 9. an inner cavity; 10. an anti-slip structure; 11. a first fastening thread; 12. an annular groove; 13. a second fastening thread; 14. and a limiting baffle.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1-4, the surgical tapping knife comprises a handle 1, a knife bar 2, a knife edge 3 and a base 4, wherein the handle 1 is used for being held by medical staff, the base 4 is provided with an abutting platform 5, the knife edge 3 is cylindrical, the knife edge 3 can reciprocate along the axial direction of the knife bar 2, and the knife edge 3 moves towards the base 4 until contacting the abutting platform 5 and realizing cutting.

Further, a driving thread 6 is provided on the cutter bar 2, an internal thread 7 is provided on the blade 3, the blade 3 is screwed with the driving thread 6, and the blade 3 is rotated so as to reciprocate along the axial direction of the cutter bar 2 even if the blade 3 is rotated. The medical staff only needs to rotate the blade 3, and the blade 3 can stably move along the thread direction and stably cut biological tissues, so that the operation difficulty is simplified.

Further, the length of the driving thread 6 is longer than the internal thread 7 of the blade 3. The length of the drive screw 6 should be at least 1.5 times the length of the internal screw 7.

Further, the cutter bar 2 is provided with a sliding platform 8, the cutting edge 3 is sleeved on the periphery of the sliding platform 8, and the cutting edge 3 is in sliding connection with the sliding platform 8. The sliding platform 8 is matched with the inner surface of the blade 3, so that guiding and stability are provided for the blade 3, and the blade 3 is ensured to move stably, not to shake and not to deviate along the thread in the process.

Further, the blade 3 is provided with an inner cavity 9. The cut tissue is retained in the lumen 9 and removed upon withdrawal of the tapping knife.

Further, the outer surface of the blade 3 is provided with a circumferential anti-slip structure 10.

Further, the cutter bar 2 is provided with a first fastening thread 11, and the handle 1 is connected and fixed to the cutter bar 2 by the first fastening thread 11.

Further, the first fastening thread 11 is threaded in the opposite direction to the driving thread 6. This arrangement makes the handle 1 not affected by the rotation of the rotating blade 3, preventing the handle 1 from falling off during the rotation of the rotating blade 3.

Further, the outer surface of the handle 1 is provided with a circumferential anti-slip structure 10, and the handle 1 is further provided with an annular groove 12. This setting makes things convenient for medical personnel to hold handle 1 more, reduces the condition emergence that appears unexpected landing in the use.

Further, the cutter bar 2 is provided with a second fastening thread 13, and the base 4 is connected and fixed to the cutter bar 2 by the second fastening thread 13.

Further, the cutter bar 2 is provided with a limiting baffle 14, and the size of the limiting baffle 14 does not exceed the abutting platform 5. The limiting stop 14 is used for limiting the position of the base 4, so that the base 4 abuts against the limiting stop 14 when screwed, and the size of the limiting stop 14 does not exceed the abutting platform 5 and does not interfere with the movement of the blade 3.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Although a number of terms are used more herein, the use of other terms is not precluded. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.

Claims

1. The utility model provides a surgical tapping knife, its characterized in that includes handle (1), cutter arbor (2), cutting edge (3), base (4), handle (1) be used for supplying medical personnel to grip, base (4) have to lean on platform (5), cutting edge (3) be cylindric, cutting edge (3) can follow the axial direction of cutter arbor (2) and do reciprocating motion, cutting edge (3) to base (4) direction motion until contact lean on platform (5) and realize the cutting.

2. A surgical tapping knife according to claim 1, characterized in that the knife bar (2) is provided with a driving thread (6), the blade (3) is provided with an internal thread (7), the blade (3) is screwed with the driving thread (6), and the blade (3) is rotated to reciprocate in the axial direction of the knife bar (2) even if the blade (3) is moved in a reciprocating manner.

3. Surgical tapping knife according to claim 2, characterized in that the length of the driving thread (6) is greater than the internal thread (7) of the blade (3).

4. Surgical tapping knife according to claim 1, characterized in that the knife bar (2) is provided with a sliding platform (8), the knife edge (3) is sleeved on the periphery of the sliding platform (8), and the knife edge (3) is in sliding connection with the sliding platform (8).

5. Surgical tapping knife according to claim 1, characterized in that the blade (3) is provided with an inner cavity (9).

6. Surgical tapping knife according to claim 1, characterized in that the outer surface of the blade (3) is provided with a circumferential anti-slip structure (10).

7. Surgical tapping knife according to claim 1, characterized in that the shaft (2) is provided with a first fastening thread (11), the handle (1) being connected and fastened to the shaft (2) by means of the first fastening thread (11), the thread direction of the first fastening thread (11) being opposite to the thread direction of the drive thread (6).

8. Surgical tapping knife according to claim 1, characterized in that the outer surface of the handle (1) is provided with a circumferential anti-slip structure (10), the handle (1) being further provided with an annular groove (12).

9. Surgical tapping knife according to claim 1, characterized in that the knife bar (2) is provided with a second fastening thread (13), and that the base (4) is connected and fastened to the knife bar (2) by means of the second fastening thread (13).

10. Surgical tapping knife according to claim 1, characterized in that the knife bar (2) is provided with a limit stop (14), the limit stop (14) not exceeding the abutment platform (5).