CN219480325U - High-frequency incision knife and medical equipment - Google Patents

Abstract

The utility model provides a high-frequency incision knife and medical equipment, which comprises a knife bar, an insulating head part and a spacing part; the cutter bar is provided with an expanding part and the section of the tail end of the cutter bar is in an I shape, the spacing part is mutually matched with the expanding part to limit the cutter bar in the front-back left-right direction, the insulating head is provided with a cavity, the spacing part and the expanding part are accommodated in the cavity and are respectively fixed with the insulating head, and the part of the expanding part exposed out of the cavity forms an electrode cutting part for cutting tissues. According to the scheme, the insulating head is firmly connected with the cutter body, the insulating head is not easy to fall off, the operation risk is reduced, and the operation safety is ensured; the whole structure is simple, the manufacture is convenient, and the cost is low.

Description

High-frequency incision knife and medical equipment

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a high-frequency incision knife and medical equipment.

Background

An Endoscopic Submucosal Dissection (ESD) system was developed on the basis of EMR by japanese endoscopists in 1990, and compared with EMR, ESD has the advantages of being capable of achieving one-time resection of larger lesions, providing complete pathological information by dissected tissues, having a low postoperative recurrence rate, and the like, and ESD has been widely used as a main endoscopic treatment technique for early stage digestive tract tumors.

The high-frequency incision knife is used as a main ESD instrument, the working principle of the high-frequency incision knife is that the high-frequency incision knife enters the alimentary canal through the forceps channel of an endoscope, an electrode connecting wire is connected with the high-frequency incision knife, a negative plate (neutral electrode) is connected with a human body, and the electrode connecting wire, the high-frequency incision knife, the human body and the negative plate form a loop to form high-frequency electric equipment. Simultaneously, the extended distal blade contacts the tissue, and the blade cuts the tissue under the action of high-frequency current.

The high-frequency incision knife is divided into two types according to whether the distal end of the knife body extending out of the tube shell is provided with an insulating head or not, and the two types are respectively provided with the insulating head and the non-insulating head. When the high-frequency incision knife with the insulating head peels off tissues in an operation, the safety coefficient is high, potential safety hazards such as perforation can be effectively prevented, the risk that the ceramic insulating head falls off easily occurs, the distal end of the knife body can damage a patient after the insulating head falls off, the insulating porcelain head needs to be taken out of the body, the instrument is replaced again, the operation time is prolonged, and potential safety hazards exist. Therefore, a high-frequency incision knife must be designed, the insulation head and the knife body are firmly connected, the insulation head is not easy to fall off, the operation risk is reduced, and the operation safety is ensured.

Disclosure of Invention

The utility model aims to provide a high-frequency incision knife, which has the advantages that the insulation head is firmly connected with the knife body, the insulation head is not easy to fall off, the operation risk is reduced, and the operation safety is ensured; the whole structure is simple, the manufacture is convenient, and the cost is low.

According to one aspect of the present utility model, a high frequency cutting knife includes a knife bar, an insulating head and a spacer; the cutter bar is provided with an expanding part and the section of the tail end of the cutter bar is in an I shape, the spacing part is mutually matched with the expanding part to limit the cutter bar in the front-back left-right direction, the insulating head is provided with a cavity, the spacing part and the expanding part are accommodated in the cavity and are respectively fixed with the insulating head, and the part of the expanding part exposed out of the cavity forms an electrode cutting part for cutting tissues.

Preferably, the expanding portion includes a first step portion and a second step portion, the spacer portion is provided with a first through hole, the diameter of the first through hole is smaller than the outer diameters of the first step portion and the second step portion, the first through hole is located at the middle position of the first step portion and the second step portion so as to limit the cutter bar in the front-back left-right direction, the second step portion is mounted at one end of the insulation head portion facing an operator, and the portion of the second step portion exposed out of the cavity forms an electrode cutting portion for cutting tissues.

Preferably, the insulating head and the spacer are integrally formed.

Preferably, the insulating head is adhesively connected to the enlarged portion by injecting glue into the cavity.

Preferably, the first step has a set of relatively parallel and planar long sides and short sides, the length of the short sides being less than the length of the long sides, such that the long sides are less than the short sides are from the center of the cross section.

Preferably, the electrode cutting part has a truncated cone shape.

Preferably, the enlarged portion is an integral piece.

Preferably, the knife bar is an integral piece.

Preferably, the insulating head is a ceramic head.

According to another aspect of the present utility model, there is provided a medical device comprising a high frequency cutting blade as described above.

The high-frequency incision knife and the medical equipment provided by the utility model have the advantages that the insulation head is firmly connected with the knife body, the insulation head is not easy to fall off, the operation risk is reduced, and the operation safety is ensured; the whole structure is simple, the manufacture is convenient, and the cost is low.

Drawings

FIG. 1 is a schematic view of the structure of an embodiment of a high frequency cutting knife;

FIG. 2 is a schematic cross-sectional view of one embodiment of a high frequency cutting blade;

FIG. 3 is a schematic view of the structure of an insulating head;

FIG. 4 is a schematic cross-sectional view of an insulating head;

FIG. 5 is a schematic view of the structure of the cutter bar 1;

fig. 6 is a schematic view of the structure of the cutter bar 2.

Detailed Description

In order to facilitate understanding of the present application, the following detailed description of the specific embodiments of the present application will be described in connection with the accompanying drawings, so that the foregoing objects, features, and advantages of the present application will be more readily understood. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, the preferred embodiments of which are shown in the accompanying drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. This application is intended to be limited to the details of the particular embodiments disclosed herein since it is to be understood that modifications may be made by those skilled in the art without departing from the spirit of the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise. In the description of the present application, the meaning of "several" means at least one, such as one, two, etc., unless explicitly defined otherwise. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In this document, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, unless explicitly stated or limited otherwise. For example, the connection can be fixed connection, detachable connection or integrated connection; can be mechanically or electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements.

For convenience of description, the end of the tool bar far from the operator is defined as the distal end, i.e., the front end, and the end held by the operator is the proximal end, i.e., the rear end, in the use direction.

Embodiments of the utility model are further elaborated below in connection with the drawings of the specification.

As shown in fig. 1 to 6, the high-frequency cutting blade of this embodiment 1 includes: the cutter bar 1, the insulating head 2 and the spacing part 3 are included, and preferably, the insulating head 2 and the spacing part 3 are integrally formed and are firmly connected. The cutter bar 1 is provided with an expansion 11 and makes the cross section of the end of the cutter bar 1 in an I shape. The insulating head 2 is provided with a cavity 21, and the spacer 3 and the expansion 11 are accommodated in the cavity 21 and fixed to the insulating head 2, respectively, preferably by injecting glue into the cavity 21 to adhesively connect the insulating head 2 and the expansion 11. The spacing part 3 is mutually matched with the expanding part 11 to limit the cutter bar 1 in the front-back left-right direction. The portion of the enlarged portion 11 exposed to the cavity 21 forms an electrode cutting portion for cutting tissue. In this embodiment, the electrode cutting portion 342 is a truncated cone, and the insulating head 2 is made of an insulating material, for example, the insulating head 2 is a ceramic head; the expansion portion 11 is an integrally formed piece, and the cutter bar 1 is an integrally formed piece.

As shown in fig. 3 to 6, specifically, the expanding portion 11 includes a first step portion 111 and a second step portion 112, the spacer portion 3 is provided with a first through hole 31, the diameter of the first through hole 31 is smaller than the outer diameters of the first step portion 111 and the second step portion 112, the first through hole 31 is located at the middle position of the first step portion 111 and the second step portion 112 to limit the cutter bar 1 in the front-rear, left-right direction, the second step portion 112 is mounted at one end of the insulating head 2 facing the operator, and the portion of the second step portion 112 exposed out of the cavity 21 forms an electrode cutting portion for cutting tissue. The first step 111 has a set of relatively parallel and planar long side 1111 and short side 1112, the length of the short side 1112 being smaller than the length of the long side 1111 such that the long side 1111 is less distant from the center of the cross section than the short side 1112 is.

When the high-frequency cutting tool is assembled, the short side 1112 of the first step part 111 is aligned with the second through hole 211 of the insulating head part 2, the cutter bar 1 extends into the cavity 21 until the second step part 112 reaches the position of the spacing part 3, the cutter bar 1 or the insulating head part 2 is rotated to enable the first step part 111 to be matched with the spacing part 3, namely, the short side 1112 of the first step part 111 passes through the first through hole 31 and is placed above the spacing part 3, the spacing part 3 limits the first step part 111 in the front-back direction, at the moment, the second step part 112 is placed below the spacing part 3, and the spacing part 3 is positioned at the middle position of the first step part 111 and the second step part 112 and limits the spacing part 3 in the front-back left-right direction of the cutter bar 1. Then glue is injected into the far end part of the cavity 21 to enable the first step part 111 and the second step part 112 to be fixedly connected with the insulation head part 2 and the spacing part 3 in an adhesive manner, so that the insulation head part 2 and the cutter bar 1 are firmly connected, and the insulation head is not easy to fall off; the scheme reduces the risk of operation and ensures the safety of the operation; the whole structure is simple, the manufacture is convenient, and the cost is low.

The utility model also provides medical equipment, which comprises the high-frequency incision knife, so that the insulation head 2 and the knife bar 1 are firmly connected, and the insulation head is not easy to fall off; the scheme reduces the risk of operation and ensures the safety of the operation; the whole structure is simple, the manufacture is convenient, and the cost is low.

It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present utility model without departing from the spirit and scope of the utility model. Therefore, it is intended that the present utility model cover the modifications and variations of this utility model provided they come within the scope of the appended claims and their equivalents.

Claims (10)

1. A high-frequency cutting knife, which is characterized by comprising a knife bar (1), an insulating head (2) and a spacing part (3); the cutter bar (1) is provided with an expanding part (11) and enables the cross section of the tail end of the cutter bar (1) to be in an I shape, the spacing part (3) is mutually matched with the expanding part (11) so as to limit the cutter bar (1) in the front-back left-right direction, the insulation head (2) is provided with a cavity (21), the spacing part (3) and the expanding part (11) are accommodated in the cavity (21) and are respectively fixed with the insulation head (2), and the part of the expanding part (11) exposed out of the cavity (21) forms an electrode cutting part for cutting tissues.

2. The high frequency cutting knife according to claim 1, wherein: the expanding part (11) comprises a first step part (111) and a second step part (112), the spacing part (3) is provided with a first through hole (31), the diameter of the first through hole (31) is smaller than the outer diameters of the first step part (111) and the second step part (112), the first through hole (31) is positioned at the middle position of the first step part (111) and the second step part (112) so as to limit the cutter bar (1) in the front-back left-right direction, the second step part (112) is mounted at one end of the insulation head part (2) facing an operator, and the part of the second step part (112) exposed out of the cavity (21) forms an electrode cutting part for cutting tissues.

3. The high frequency cutting knife according to claim 1, wherein: the insulation head part (2) and the spacing part (3) are integrally formed.

4. A high frequency cutting knife according to claim 3, wherein: -adhesively connecting the insulating head (2) to the enlarged portion (11) by injecting glue into the cavity (21).

5. The high frequency cutting knife according to claim 2, wherein: the first step (111) has a set of relatively parallel and planar long sides (1111) and short sides (1112), the short sides (1112) having a length less than the length of the long sides (1111) such that the long sides (1111) are at a distance from the center of the cross section less than the short sides (1112) are at the center of the cross section.

6. The high frequency cutting knife according to claim 2, wherein: the electrode cutting part is in a truncated cone shape.

7. The high frequency cutting knife according to claim 2, wherein: the expansion part (11) is an integral molding.

8. The high frequency cutting knife according to claim 2, wherein: the cutter bar (1) is an integral molding piece.

9. The high frequency cutting knife according to claim 1, wherein: the insulation head (2) is a ceramic head.

10. A medical device, characterized by: comprising a high frequency cutting blade according to any one of claims 1-9.