CN2384580Y

CN2384580Y - Two-side multitooth sleeve biopsy needle

Info

Publication number: CN2384580Y
Application number: CN 99242038
Authority: CN
Inventors: 刘勤江; 王军
Original assignee: GANSU PROVINCE MEDICAL SCIENCE INSTITUTE
Current assignee: GANSU PROVINCE MEDICAL SCIENCE INSTITUTE
Priority date: 1999-08-28
Filing date: 1999-08-28
Publication date: 2000-06-28
Anticipated expiration: 2009-08-28

Abstract

The utility model relates to a two-side multitooth sleeve biopsy needle, which is composed of the outer sleeve of a biopsy needle, a needle core, a puncture needle. The needle core forms a sliding fit with the puncture needle which forms a sliding fit with the outer sleeve. Two staggered window teeth are arranged on the end of the puncture needle. The utility model results in small partial hemorrhage and small damage when the utility model punctures. The utility model is not easy to result in the diffusion of tumor cells and can avoid the window teeth of the puncture needle cutting skin and surrounding tissue when the utility model punctures the tumor cells and avoid the needle track implantation of the tumor cells. The utility model has the design of the double teeth arranged in different directions, shortening biopsy blind areas and ensuring the biopsy needle takes accurate materials from human bodies. The tissue cut out can be used for testing in cytology and pathological histology. The utility model has high safety.

Description

Two-sided multiple tooth shell type biopsy needle

This utility model relates to medical instruments field, particularly a kind of two-sided multiple tooth shell type biopsy needle.

At present, patient's body surface soft tissue is used to puncture, lymph node, thyroid, mammary gland etc. are organized organ pipe, sting and get piece of tissue, carry out the existing report of biopsy needle and the use of the histopathology diagnosis of biological tissue at home and abroad, as " multipurpose negative pressure rotary-cut biopsy needle ", " can debug the automatic biopsy device ", " the multi-functional biopsy pin of spoon formula " etc., the use of above technology, to alleviating patient's misery, accurately carrying out cytologic diagnosis fast all has its specific meaning, but because the restriction on the above-mentioned technical pattern, have following deficiency: during puncture damage bigger, the possibility that causes tumor cell diffusion is arranged; To the further classification of tumor, judge its differentiation degree, understand the tissue-derived of metastatic carcinoma and have any problem, make some cases can't formulate therapeutic scheme etc.

The purpose of this utility model is the deficiency that exists at above technology, when designing a kind of puncture local hemorrhage less, cause damage little, be difficult for making tumor cell diffusion, the tooth of puncture needle is cut surrounding tissue, skin to pieces in the time of can preventing to puncture, and can prevent that tumor cell needle track implantation and obtained piece of tissue from can carry out the two-sided multiple tooth shell type biopsy needle of cytological histopathologic examination simultaneously.

The purpose of this utility model can be achieved through the following technical solutions: design a kind of two-sided multiple tooth shell type biopsy needle, this biopsy needle is made up of overcoat, nook closing member and puncture needle, nook closing member is real cored structure, puncture needle, overcoat are hollow-core construction, nook closing member can insert in the puncture needle, and puncture needle can insert in the overcoat, and the end that covers into outside puncture needle passes in the sick body is provided with two window teeth that stagger, the angle of release α of its window tooth is 15-20 °, and crown is a bidentate.

This utility model compared with prior art; The damage that local hemorrhage causes during puncture is less, and the design of trocar sheath and use have avoided tumor cell to spread along needle track implantation, and the tooth of puncture needle is cut skin and surrounding tissue to pieces can prevent to puncture the time, the design of different directions bidentate, shortened the biopsy blind area, can make and draw materials accurately, safe and reliable.

Fig. 1 is this utility model overcoat sketch map

Fig. 2 is this utility model nook closing member sketch map

Fig. 3 is this utility model puncture needle sketch map

Fig. 4 is the local enlarged diagram of this utility model window tooth

Fig. 5 is the local enlarged diagram of this utility model window tooth crown

Fig. 6 is the mutual socket sketch map of this utility model

Below in conjunction with accompanying drawing this utility model is described in further detail, design a kind of two-sided multiple tooth shell type biopsy needle, form by overcoat 1, nook closing member 2 and puncture needle 3, nook closing member 2 is real cored structure, puncture needle 3, overcoat 1 are hollow core structures, nook closing member 2 can insert in the puncture needle 3, and puncture needle 3 can insert in the overcoat 1, being inserted as movingly between them; Pass overcoat 1 at puncture needle 3 and enter the end that will get tissue and be provided with two window teeth 30 and 31 that stagger, the angle of release α of its window tooth is 15-20 °, and crown 32 is a bidentate.Use of the present utility model: tumor locus skin routine disinfection at first, choose puncture position and inserting needle direction, avoid trunk, refreshing essence and important organ (trachea, esophagus etc.), earlier go into skin and subcutaneous tissue to borderline tumor after the local anaesthesia, fixedly lump and trocar sheath with the overcoat intubate; Earlier nook closing member 2 is inserted in the puncture needles, thrust biopsy needle again in the trocar sheath and thrust straightly into and arrive the degree of depth of estimating in the tumor, extract nook closing member, connect the syringe negative pressure-pumping, extract biopsy needle while aspirating, extract trocar sheath at last, local compression 5-15 minute.

Claims

1, a kind of two-sided multiple tooth shell type biopsy needle, it is characterized in that: biopsy needle is made up of overcoat (1), nook closing member (2) and puncture needle (3), nook closing member (2) is real cored structure, puncture needle (3), overcoat (1) are hollow core structures, nook closing member (2) can insert in the puncture needle (3), and puncture needle (3) can insert in the overcoat (1), and the end that passes overcoat (1) at puncture needle (3) is provided with two window teeth (30) that stagger and (31), the angle of release α of its window tooth is 15-20 °, and crown (32) is a bidentate.