A percutaneous bone biopsy device

Abstract

The present invention provides a percutaneous bone puncture biopsy device, comprising a Kirschner wire, a needle core and a percutaneous bone puncture cannula, wherein the needle core is sleeved on the Kirschner wire, and the tail of the Kirschner wire is led out from the tail end of the needle core, and the percutaneous bone puncture cannula is sleeved on the needle core, and the percutaneous bone puncture cannula is provided with a gripping portion. The device overcomes the shortcomings of existing puncture devices, improves the success rate of puncture, makes the operator safer, more convenient, more accurate and more effective during the operation, and avoids repeated punctures that damage important tissues and spread of lesions. The device belongs to the field of medical operation instruments.

Description

Technical Field

[0001] The invention relates to a percutaneous bone puncture biopsy device, belonging to the field of medical operation instruments. Background Art

[0002] When lesions occur in the spine, pelvis, and limb bones, because their nature is unclear, surgical biopsy is routinely performed to clarify the lesions and formulate a plan for further effective treatment. Conventional surgery has shortcomings such as large trauma, heavy bleeding, accelerated spread of lesions, and increased risk of radical surgery. In recent years, with the continuous development of percutaneous technology, minimally invasive percutaneous puncture and C-arm monitoring puncture biopsy can avoid many of the shortcomings of open surgery.

[0003] When bone lesions occur in the spine, pelvis, and limb joints, 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, resulting in the cannula being removed and the puncture lesion remaining intact, requiring repeated punctures or puncture failure. Summary of the invention

[0004] The present invention provides a device for performing percutaneous puncture biopsy when lesions occur in the spine, pelvis and limb bones. Its main purpose is to overcome the shortcomings of existing puncture devices, improve the puncture success rate, make the operator safer, more convenient, accurate and effective during the operation, and avoid repeated punctures that damage important tissues and spread of lesions.

[0005] In order to solve the above problems, it is proposed to adopt a percutaneous bone puncture biopsy device, including 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 led out from the tail end of the needle core. The percutaneous bone puncture cannula is sleeved on the needle core, and the percutaneous bone puncture cannula has a gripping portion, the front end is serrated, and the inner wall of the front cannula is internally threaded.

[0006] 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 axially inside. The head at the front end of the percutaneous bone puncture cannula is a serrated structure arranged along the circumferential direction, which is convenient for entering the lesion. The percutaneous bone puncture cannula is threadedly connected with the needle core. Specifically, the inner side of the front section of the percutaneous bone puncture cannula has an internal thread, and the outer side of the front end of the needle core has an external thread matching it. The two are threadedly connected at the front end, which is conducive to fixing and removing the lesion. The gripping part at the tail end of the percutaneous bone puncture cannula is a rod-shaped structure arranged perpendicular to the percutaneous bone puncture cannula, forming a "T"-shaped structure with the percutaneous bone puncture cannula.

[0007] In the aforementioned percutaneous bone puncture biopsy device, the needle core diameter is 2.5-4.5mm, the head at the front end of the needle core is a triangular pyramid, which is convenient for puncturing bone lesions. The needle core is a hollow structure with openings at both ends and an inner diameter of 1.1-1.2mm. The Kirschner wire has a diameter of 1mm, the front end of the Kirschner wire is also a triangular pyramid, the tail end is flat, and the surface is marked with cm scales and mm small grids.

[0008] Compared with the prior art, the present invention designs the inner thread of the hollow inner wall of the front section of the puncture cannula and provides tooth-like protrusions. When the specimen is rotated into the lesion, it can form a tight bite with the inner thread teeth of the cannula, and the specimen can be smoothly removed after being fixed. It overcomes the defects of conventional puncture cannulas that multiple punctures are required and the specimen cannot be removed. In addition, due to the uniform scale markings on the surface of the puncture cannula, the depth position of the cannula needle can be determined in real time, making the operation simple and safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the present invention;

[0010] Figure 2 It is a schematic diagram of the structure of a percutaneous bone puncture cannula;

[0011] Figure 3 It is a schematic diagram of the structure of the needle core;

[0012] Figure 4 This is a schematic diagram of the structure of a Kirschner wire. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0014] Example:

[0015] Reference Figures 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 led 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 gripping portion 4.

[0016] The diameter of the needle core 2 is 2.5, 3.5, and 4.5 mm. The head of the front end of the needle core 2 is a triangular pyramid, which is convenient for puncturing bone lesions. The tail end of the needle core 2 has a tail handle 5. The needle core 2 is a hollow structure with openings at both ends and an inner diameter of 1.1 mm. The diameter of the Kirschner wire 1 is 1 mm. The front end of the Kirschner wire 1 is also a triangular pyramid, and the tail end is flat. The surface is marked with cm scales and mm small grids. The body length of the needle core 2 (the length of the front end main body) is consistent with the length of the percutaneous bone puncture cannula 3. The front end 3CM is an external tooth spiral. During puncture, the percutaneous bone puncture cannula 3 is integrated with the needle core 2. After the positioning needle successfully reaches the surface of the lesion, the needle core 2 is taken out. According to the size of the lesion and the scale on the surface of the cannula, the percutaneous bone puncture cannula 3 is gradually rotated to enter the lesion, so as to judge the depth of entering the lesion and the required specimen amount. When the ideal puncture position is obtained, the percutaneous bone puncture cannula 3 is directly pulled out. Since the specimen is tightly combined with the toothed inner spiral at the front end of the percutaneous bone puncture cannula 3, the specimen is fixed in the percutaneous bone puncture cannula 3; then the needle core 2 is screwed into the percutaneous bone puncture cannula 3 to remove the specimen from the cannula.

[0017] The percutaneous bone puncture cannula 3 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 axially inside. The head at the front end of the percutaneous bone puncture cannula 3 is a serrated structure arranged along the circumferential direction, which is convenient for entering the lesion. 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 an internal thread, and the outer side of the front end of the needle core 2 has an external thread matching it. The two are threadedly connected at the front end, which is conducive to fixing and removing the lesion. The holding portion 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, and forms a "T"-shaped structure with the percutaneous bone puncture cannula 3.

[0018] When in use, the hollow inner wall of the front end of the puncture cannula is designed with an internal thread and a tooth-like protrusion. When the specimen is rotated into the lesion, it can form a tight bite with the inner thread teeth of the cannula, and the specimen can be smoothly removed after being fixed. This overcomes the defects of conventional puncture cannulas that require multiple punctures and the specimen cannot be removed. In addition, due to the uniform scale markings on the surface of the puncture cannula, the depth position of the cannula needle can be determined in real time, making the operation simple and safe.

[0019] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A percutaneous bone biopsy device, characterized in that: The invention comprises a Kirschner wire (1), a needle core (2) and a percutaneous bone puncture cannula (3), wherein the needle core (2) is sleeved on the Kirschner wire (1), and the tail of the Kirschner wire (1) is led out from the tail end of the needle core (2), and the percutaneous bone puncture cannula (3) is sleeved on the needle core (2), and the percutaneous bone puncture cannula (3) is provided with a gripping portion (4); The percutaneous bone puncture cannula (3) 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 axially inside. The head at the front end of the percutaneous bone puncture cannula (3) is a sawtooth structure arranged along the circumferential direction. The percutaneous bone puncture cannula (3) is threadedly connected to the needle core (2), and the gripping portion (4) at the rear end of the percutaneous bone puncture cannula (3) is a rod-shaped structure arranged perpendicular to the percutaneous bone puncture cannula (3); The needle core (2) has a diameter of 2.5-4.5 mm, the head of the front end of the needle core (2) is in the shape of a triangular pyramid, the needle core is a hollow structure, both ends are open, and the inner diameter is 1.1-1.2 mm. The Kirschner wire (1) has a diameter of 1 mm, the front end of the Kirschner wire (1) is also in the shape of a triangular pyramid, and the tail end is flat; The length of the body of the needle core (2) is consistent with the length of the percutaneous bone puncture cannula (3), and the front end 3CM is in the form of an external tooth spiral. During puncture, 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 the needle core (2) is taken out. According to the size of the lesion and the scale on the surface of the cannula, the percutaneous bone puncture cannula (3) is gradually rotated to enter the lesion, so as to judge the depth of entering the lesion and the required amount of specimen. When the ideal puncture position is obtained, the percutaneous bone puncture cannula (3) is directly pulled out. Because the specimen is tightly combined with the toothed internal spiral at the front end of the percutaneous bone puncture cannula (3), the specimen is fixed in the percutaneous bone puncture cannula (3); then the needle core (2) is screwed into the percutaneous bone puncture cannula (3), and the specimen can be taken out from the cannula; The inner side of the front end of the percutaneous bone puncture cannula (3) has an internal thread, and the outer side of the front end of the needle core (2) has an external thread matching the internal thread. The two are connected at the front end thread, which is conducive to fixing and removing the lesion. By designing the hollow inner wall of the front end of the percutaneous bone puncture cannula (3) with an internal thread and providing a tooth-like protrusion, when the specimen is rotated into the lesion, the specimen can be tightly engaged with the inner thread teeth of the cannula, and the specimen can be fixed and removed smoothly.

Images