CN211834499U - A percutaneous bone biopsy device - Google Patents

Abstract

The utility model provides a percutaneous bone puncture biopsy device, including ke shi needle, nook closing member and percutaneous bone puncture sleeve pipe, the nook closing member cover is located on the ke shi needle, and the afterbody of ke shi needle is drawn forth by the tail end of nook closing member, and percutaneous bone puncture sleeve pipe cover is located on the nook closing member, and has the portion of gripping on the percutaneous bone puncture sleeve pipe. The puncture device overcomes the defects of the existing puncture device, improves the puncture success rate, ensures that an operator is safer, more convenient, more accurate and more effective in the operation process, and avoids repeatedly puncturing and damaging important tissues and pathological change diffusion. Belongs to the field of medical operation instruments.

Description

A percutaneous bone biopsy device

technical field

The utility model relates to a percutaneous bone puncture biopsy device, which belongs to the field of medical operation instruments.

Background technique

When lesions of the spine, pelvis, and extremities occur, due to their unknown nature, routine surgical biopsy is required to identify the lesions and formulate a plan for further effective treatment. Conventional surgery has shortcomings such as large trauma, heavy bleeding, accelerated lesion spread, and increased risk of radical surgery. In recent years, with the continuous development of percutaneous technology, minimally invasive percutaneous puncture and needle biopsy under C-arm monitoring can avoid many shortcomings of open surgery.

When bone lesions occur in the spine, pelvis and limbs, the front end of the previous puncture device is hollow and smooth, the base of the lesion is not broken, and there is no embedded fixation between the lesion tissue and the puncture cannula, which leads to the removal of the cannula. Multiple punctures or failed punctures.

SUMMARY OF THE INVENTION

The utility model provides a device for performing percutaneous puncture biopsy when lesions of the spine, pelvis and limbs occur, the main purpose of which is to overcome the deficiencies of the existing puncture devices, improve the success rate of puncture, and make the operator more efficient in the operation process. It is safe, convenient, accurate and effective, avoiding repeated puncture damage to important tissues and the spread of lesions.

In order to solve the above problems, it is proposed to use such a percutaneous bone puncture biopsy device, which includes a Kirschner wire, a needle core and a percutaneous bone puncture cannula, the needle core is sleeved on the Kirschner wire, and the tail of the Kirschner wire is connected by a needle. The tail end of the core is drawn out, the percutaneous bone puncture cannula is sleeved on the needle core, and the percutaneous bone puncture cannula is provided with a holding part, the front end is serrated, and the inner wall of the front cannula is in the shape of an internal thread.

In the aforementioned percutaneous bone puncture biopsy device, the percutaneous bone puncture cannula is a cylinder with an outer diameter of 4-6 mm, and a needle core tunnel with a diameter of 2.5-4.5 mm is opened inside along the axial direction. The head of the front end is a serrated structure arranged in the circumferential direction, which is convenient for entering the lesion, and the percutaneous bone puncture cannula is threadedly connected with the needle core. The outer side has a matching external thread, and the two are threadedly connected at the front end, which is beneficial to fix and remove the lesion. The percutaneous bone puncture cannula constitutes a "T"-shaped structure.

In the aforementioned percutaneous bone puncture biopsy device, the diameter of the needle core is 2.5-4.5mm, the head of the front end of the needle core is in the shape of a triangular pyramid, which is convenient for puncturing bone lesions, the needle core is a hollow structure, both ends are open, and the inner diameter is 1.1- 1.2mm, the diameter of the Kirschner wire is 1mm, the front end of the Kirschner wire is also in the shape of a triangular pyramid, the end is flat, and the surface is marked with a scale of cm, and is divided into small grids of mm.

Compared with the prior art, the utility model designs the inner thread on the hollow inner wall of the front section of the puncture cannula and has tooth-like protrusions. When rotating into the lesion, the specimen can form a tight bite with the teeth of the inner thread of the cannula, and the specimen can be fixed and taken out smoothly. It overcomes the defects that the conventional puncture cannula requires multiple punctures and the specimen cannot be taken out. In addition, due to the uniform scale marks on the surface of the puncture cannula, the depth position of the trocar can be determined in real time, which makes the operation simple and safe.

Description of drawings

Fig. 1 is the structural representation of the present utility model;

Fig. 2 is the structural representation of percutaneous bone puncture cannula;

Fig. 3 is the structural representation of needle core;

Figure 4 is a schematic diagram of the structure of the Kirschner wire.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model more clear, the present utility model will be further described in detail below with reference to the accompanying drawings.

Example:

1 to 4, the present embodiment provides a percutaneous bone puncture biopsy device, including a Kirschner wire 1, a needle core 2 and a percutaneous bone puncture cannula 3, the needle core 2 is sleeved on the Kirschner wire 1, And the tail of the Kirschner wire 1 is drawn out from the tail end of the needle core 2 , the percutaneous bone puncture cannula 3 is sleeved on the needle core 2 , and the percutaneous bone puncture cannula 3 has a grip portion 4 .

The diameter of the needle core 2 is 2.5, 3.5, and 4.5 mm, and the head at the front end of the needle core 2 is a triangular pyramid, which is convenient for puncturing the bone lesions. , the inner diameter is 1.1mm, the diameter of the Kirschner needle 1 is 1mm, the front end of the Kirschner needle 1 is also a triangular pyramid shape, the tail end is flat, the surface is marked with a cm scale, and the mm is divided into small grids. The length of the body of the needle core 2 ( The length of the main body of the front end) is consistent with the length of the percutaneous bone puncture cannula 3. The front end 3CM is in the shape of an external tooth spiral. When puncturing, the percutaneous bone puncture cannula 3 and the needle core 2 are integrated, and the positioning needle smoothly reaches the surface of the lesion, and then takes it out. Needle core 2, according to the size of the lesion and the scale on the surface of the cannula, gradually rotate the percutaneous bone puncture cannula 3 to enter the lesion, so as to determine the depth of the entry into the lesion and the required amount of specimen. When the ideal puncture position is obtained, pull it out directly Percutaneous bone puncture cannula 3, because the specimen is tightly combined with the dentate inner spiral at the front end of percutaneous bone puncture cannula 3, the specimen is fixed in percutaneous bone puncture cannula 3; then the needle core 2 is used for percutaneous bone puncture. The cannula 3 is screwed in, and the specimen can be taken out from the cannula.

The percutaneous bone puncture cannula 3 is a cylinder with an outer diameter of 4-6mm, and a needle core tunnel with a diameter of 2.5-4.5mm is opened in the axial direction. The head of the front end of the percutaneous bone puncture cannula 3 is arranged in the circumferential direction. The percutaneous bone puncture cannula 3 is threadedly connected with the needle core 2, specifically: the inner side of the front end of the percutaneous bone puncture cannula 3 has internal threads, and the outer side of the front end of the needle core 2 has a matching thread. The external thread is connected with the front end, which is beneficial to fix and remove the lesion. The holding part 4 at the tail end of the percutaneous bone puncture cannula 3 is a rod-shaped structure set perpendicular to the percutaneous bone puncture cannula 3, which is in line with the percutaneous bone puncture cannula 3. The bone puncture cannula 3 forms a "T"-shaped structure.

When in use, the hollow inner wall of the front end of the puncture cannula is designed with internal threads and has dentate protrusions. When rotating into the lesion, the specimen can form a tight bite with the teeth of the internal thread of the cannula, and the specimen can be fixed and taken out smoothly. It overcomes the defects that the conventional puncture cannula requires multiple punctures and the specimen cannot be taken out. In addition, due to the uniform scale marks on the surface of the puncture cannula, the depth position of the trocar can be determined in real time, which makes the operation simple and safe.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection of the utility model.

Claims (3)

1. a percutaneous bone puncture biopsy device is characterized in that: comprise Kirschner wire (1), needle core (2) and percutaneous bone puncture cannula (3), needle core (2) is sleeved on Kirschner wire (1), and the tail of the Kirschner wire (1) is drawn out from the tail end of the needle core (2), the percutaneous bone puncture cannula (3) is sleeved on the needle core (2), and the percutaneous bone puncture sleeve The tube (3) is provided with a grip portion (4). 2. A percutaneous bone puncture biopsy device according to claim 1, characterized in that: the percutaneous bone puncture cannula (3) is a cylinder with an outer diameter of 4-6mm, and the inside is provided with a diameter along the axial direction. For the needle core tunnel of 2.5-4.5 mm, the head of the front end of the percutaneous bone puncture cannula (3) is a serrated structure arranged in the circumferential direction, and the percutaneous bone puncture cannula (3) is threadedly connected with the needle core (2), The holding part (4) at the tail end of the percutaneous bone puncture cannula (3) is a rod-shaped structure arranged perpendicular to the percutaneous bone puncture cannula (3). 3. A percutaneous bone biopsy device according to claim 1, characterized in that: the diameter of the needle core (2) is 2.5-4.5 mm, the head of the front end of the needle core (2) is a triangular pyramid, the needle The core is a hollow structure, both ends are open, and the inner diameter is 1.1-1.2 mm. The diameter of the K-wire (1) is 1 mm.

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