CN2314742Y

CN2314742Y - Medical biopsy puncture needle

Info

Publication number: CN2314742Y
Application number: CN 97244922
Authority: CN
Inventors: 张延亮; 蒋贵兰; 张建民; 杨慧; 王浙; 李书鹏; 李耕荣; 蒋贵云
Original assignee: 张延亮
Priority date: 1997-11-23
Filing date: 1997-11-23
Publication date: 1999-04-21
Anticipated expiration: 2007-11-23

Abstract

The utility model relates to a medical biopsy puncture needle used for obtaining lesion tissues and examining sicknesses. The utility model is composed of a hollow needle, a core needle and a jacket tube. The hollow needle is provided with a suction hole. The core needle is inserted into a needle hole of the hollow needle. The jacket tube is sheathed on the hollow needle. The jacket tube is provided with an annular cutting edge and a handle. An oblique incision of a puncture end of the hollow needle and an oblique section of the core needle lie in the same oblique section. End heads contacted between the hollow needle and the core needle are respectively provided with a positioning groove and a positioning bulge. The positioning groove is mutually matched with the positioning bulge. The jacket tube is pushed after puncture. The lesion tissues sucked into the needle hole of the hollow needle are cut out and kept in the needle hole. The utility model can obtain the lesion tissues of a lymph gland, a tumour, etc. only needs one puncture.

Description

Medical biopsy needle

This utility model relates to a kind of medical apparatus and instruments, and particularly a kind of pathological tissues that obtains is in order to check the medical biopsy needle of disease.

In the prior art, be used to obtain the medical biopsy needle of pathological tissues clinically, constituted by the core pin in a hollow needle and the hollow pin hole of insertion.The oblique section of its core pin needle point and the angular cut of hollow needle needle tip are on the same oblique section.Detent with core needle end projection kissing platform is arranged, so that insert the inclined-plane of the core pin needle point in the hollow needle and the inclined-plane of hollow needle needle point is on the same oblique section on hollow needle and the joint that syringe is connected.When pathological tissues was obtained in puncture, hollow needle thrust pathological tissues in the lump together with the core pin, and this moment, the needle tip of core pin was blocked the angular cut of hollow needle.After being punctured to pathological tissues the core pin is extracted out, connected syringe on the termination of hollow needle, the piston rod of pulling syringe sucks pathological tissues in the hollow needle pin hole under suction function.Extract hollow needle then, the piston rod of pushing syringe is checked the discharge of the pathological tissues in the suction hollow needle pin hole.The medical biopsy needle of said structure only depends on swabbing action, can only aspirate a spot of pathological tissues, sometimes do not break away from because of the pathological tissues that is drawn into the interior pathological tissues of hollow needle pin hole and patient's integral body, when extracting hollow needle and pin hole break away from, can't obtain pathological tissues, influence the success rate of biopsy puncture.

The purpose of this utility model is to disclose the medical biopsy needle that a kind of one-time puncture successfully can obtain pathological tissues.

This utility model is realized by following structure.

Medical biopsy needle comprises a hollow needle, and the cutting tip termination portion of hollow needle is an angular cut, on the joint of connection syringe one end the spill locating slot is arranged, and on the wall of hollow needle inlet hole is arranged.A core pin that inserts in the hollow needle pin hole is arranged, the cutting tip termination of the core pin actinal surface of cutting sth. askew, during puncture the angular cut of hollow needle is blocked, to prevent that non-pathological tissues from entering in the angular cut in piercing process, the oblique section of core pin and the angular cut of hollow needle are on the same oblique section, the exposing of core pin have on the termination with the hollow needle joint on the positioning convex that matches of spill locating slot, to guarantee that the core pin inserts in the hollow needle pin hole, the oblique section of core pin and the angular cut of hollow needle are on the same inclined-plane.But be with the sleeve pipe of a reciprocating sliding on the hollow needle, the circular blade that sleeve pipe constitutes at the spin canting that tilts towards the oriented internal surface of sleeve pipe of the termination portion of an end of hollow needle inlet hole.Telescopic length is advisable with not topped inlet hole for 1/2 to 2/3 of about hollow needle.Be enclosed within its circular blade of sleeve pipe on the hollow needle and the outer wall of hollow needle and be sliding-contact.

Medical biopsy needle thrusts its inlet hole section in the pathological tissues when clinical use, extract the core pin, syringe is connected on the hollow needle, twitch the piston rod of syringe, make to form negative pressure in the hollow needle, the pathological tissues of close inlet hole just is inhaled in the hole of hollow needle; At this moment, keep negative pressure in the hollow needle, promote to be enclosed within sleeve pipe on the hollow needle, will suck the interior pathological tissues of hollow needle pin hole with the circular blade on the sleeve pipe termination and cut away, and be present in the pin hole of hollow needle to sucking nose end; Then hollow needle and sleeve pipe are extracted simultaneously, the piston rod of pushing syringe is promptly discharged hollow needle to the pathological tissues that cuts away (as lymph node, tumor etc.) and is checked.Use medical biopsy needle described in the utility model, but the pathological tissues that obtains is big and the one-time puncture success, has guaranteed the success rate of biopsy puncture.

Below in conjunction with embodiment and accompanying drawing in detail this utility model is described in detail.

Fig. 1 is the structure chart of medical biopsy needle

Fig. 2 is the front view of Fig. 1 middle sleeve 6

Fig. 3 is the left view of Fig. 2

Among the figure: 1, core pin termination; 2, positioning convex; 3, detent; 4, hollow needle termination; 5, sleeve pipe hands handle; 6, sleeve pipe; 7, circular blade; 8, core pin; 9, hollow needle; 10, inlet hole.

In the embodiment shown in fig. 1, the cutting tip of hollow needle 9 has an angular cut, leading portion has the inlet hole 10 of the pathological tissues that communicates with pore, inlet hole 10 is three (not showing entirely among the figure), three inlet hole 10 spirals are distributed on the puncture section, the anglec of rotation between the adjacent inlet hole is 120 °, and sucking 10 is circular hole or vertical hole, ellipse garden or slotted hole longitudinally.There is the detent 3 of an opening towards core pin termination 1 contact surface the hollow needle termination 4 that hollow needle 9 is connected with syringe.There is an oblique section termination of the cutting tip of the core pin 8 of insertion hollow needle 9, and the angular cut of oblique section and hollow needle 9 is on the same oblique section.The positioning convex 2 that matches with location tongue 3 is arranged on the core pin termination 1 of core pin 8.Be enclosed within sleeve pipe 6 on the hollow needle 9 at the circular blade 7 that oblique internal surface of sleeve pipe is arranged and constitute with spin canting that inwall intersects on the mouth of pipe of cutting tip, the tube head end of sleeve pipe 6 has promotion sleeve pipe 6 to cut the handle 5 of pathological tissues, and handle 5 is symmetric two otic placodes.

Claims

1, a kind of medical biopsy needle that is used to obtain patient's pathological tissues, it comprises a hollow needle (9), angular cut on the puncture termination of hollow needle, detent (3) on the termination (4) that hollow needle (9) is connected with syringe, insert the core pin (8) in hollow needle (9) pin hole, have on the cutting tip termination of core pin (8) with hollow needle (9) termination on angular cut be in the oblique section on same inclined-plane, the positioning convex (2) that has the detent (3) on the termination (4) with hollow needle (9) to match on the core pin termination (1) of core pin (8), it is characterized in that: the pathological tissues inlet hole (10) that the puncture Duan Youyu hollow needle pin hole of hollow needle (9) communicates, hollow needle (9) is with a pipe (6), sleeve pipe (6) is at the circular blade (7) that oblique internal surface of sleeve pipe is arranged on the mouth of pipe of the cutting tip of hollow needle (9) and constitute with spin canting that inwall intersects, and the termination of sleeve pipe (6) has and the integrant handle of sleeve pipe (6) (5).

2, a kind of medical biopsy needle according to claim 1, its feature also is: the inlet hole (10) on hollow needle (9) the puncture section is hole, garden or shape hole, ellipse longitudinally garden or slotted hole longitudinally.

3, medical biopsy needle according to claim 1, its feature also is: the inlet hole (10) on hollow needle (9) the puncture section is for a plurality of, and spiral is distributed on the puncture section, and the angle between the adjacent inlet hole is 120 °.

4, a kind of medical biopsy needle according to claim 1, its feature also is: the handle (5) of sleeve pipe (6) termination portion is symmetric two otic placodes.