CN2899710Y

CN2899710Y - Biopsy needle

Info

Publication number: CN2899710Y
Application number: CN 200620073058
Authority: CN
Inventors: 沈义祥
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-04-26
Filing date: 2006-04-26
Publication date: 2007-05-16
Anticipated expiration: 2016-04-26

Abstract

The utility model discloses a biopsy needle in the technical field of medical equipment, which comprises a needle core and a needle sleeve arranged coaxially and match each other. On the needle core and near the end of the needle core, an axial slot is provided; the end of the needle sleeve is a cutting-edge shrinking inward; the end of the needle end comprises three slants that are crossed in conic way, the two of them are arranged axially symmetric about the needle core; the intercrossing line of the two symmetric slants extends forward and downward from the cone top to the edge of the needle core; the third slant extends backward and upward from the cone top to the edge of the needle core. As the end of the needle core of the biopsy needle is the ends of two crossed slants, the end of the needle core is sharp, the resistance is small at puncturing, the puncturing is easier; as the third slant extends backward and upward from the cone top to the edge of the needle core, the slant has a small included angle with the central line, so smooth transition can be achieved at puncturing, and low damage occurs on tissues. The utility model can be used for biopsy sampling of deep pathologic tissue.

Description

A kind of biopsy needle

Technical field

This utility model relates to a kind of medical apparatus and instruments, during particularly a kind of the check from the utensil of living body sampling.

Background technology

Making a definite diagnosis of numerous disease need be done the pathology cut sections for microscopic examination, for obtaining pathological tissue, especially be hidden in the pathological tissue of body interior, the sampling of need puncturing, in the prior art, a kind of biopsy needle is arranged, comprise nook closing member coaxial setting and that match and needle guard, the end of nook closing member is an angular cut, is provided with axial groove near the nook closing member end on the nook closing member, the needle guard end is the cutting edge that inwardly shrinks, when biopsy is taken a sample, nook closing member and needle guard are pushed biological tissue inside simultaneously, confirm that through video picture means such as B ultrasonic nook closing member arrives the pathology position, pathological tissue can embed in the axial groove, at this moment, push needle guard to needle point rapidly, the pathological tissue that the cutting edge on the needle guard will embed in the axial groove downcuts a fritter, withdraw from nook closing member and needle guard, take out pathological tissue and can carry out cut sections for microscopic examination.Because the nook closing member end of this biopsy needle is an angular cut, the end of cutting blade is in the arc-shaped, and resistance is bigger when puncture, and puncture is difficulty relatively, and is bigger to the damage of tissue.

The utility model content

The purpose of this utility model provides a kind of biopsy needle, and puncture is more prone to when making biopsy, and is little to tissue injury.

The purpose of this utility model is achieved in that a kind of biopsy needle, comprise nook closing member coaxial setting and that match and needle guard, be provided with axial groove near the nook closing member end on the nook closing member, the needle guard end is the cutting edge that inwardly shrinks, described nook closing member end comprises tapered three crossing inclined planes, wherein two inclined planes axially are symmetrical arranged along nook closing member, the intersection on described two symmetrically arranged inclined planes from the vertex of a cone forward, extend downward the nook closing member edge, the 3rd inclined plane from the vertex of a cone backward, extend upwardly to the nook closing member edge.

During this utility model work, nook closing member and needle guard are pushed biological tissue inside simultaneously, confirm that through video picture means such as B ultrasonic nook closing member arrives the pathology position, pathological tissue can embed in the axial groove, at this moment, push needle guard to needle point rapidly, the pathological tissue that the cutting edge on the needle guard will embed in the axial groove downcuts a fritter, withdraw from nook closing member and needle guard, take out pathological tissue and can carry out cut sections for microscopic examination.Because the nook closing member end of this biopsy needle is the end on two crossing inclined planes, make the end of nook closing member become sharp keen tip, resistance is little when puncture, and puncture is more prone to; Since the 3rd inclined plane from the vertex of a cone backward, extend upwardly to the nook closing member edge, the angle of this face and centrage is little, can seamlessly transit during puncture, and is less to the damage of organizing.This utility model can be used for the biopsy sampling of the pathological tissue of deep layer.

Convenient for pathological tissue is cut, the cutting edge on the described needle guard is an angular cut.During work, the tip of angular cut at first contacts tissue to be cut, and angular cut cutting resistance is little, easier entering in the tissue.

For the control paracentesis depth, be set with jump ring on the described needle guard, the two ends of jump ring are respectively equipped with into the pressing plate that angle is provided with, and jump ring is arranged in the support set, and the head and the tail two ends of jump ring are stretched out and are connected with pressing plate from the lateral opening of support set.During use, hands pinches two pressing plates, jump ring is unclamped, then jump ring and support set can slide on needle guard, unclamp hands then jump ring tighten up and be fixed on the needle guard, puncture and when cutting and organizing, when being punctured to when making support set abut in skin surface, then arrive spacing position, penetrate problem in the time of can avoiding puncturing with leakage.

Be the paracentesis depth of indication trocar, trocar is provided with some graduation marks.

Description of drawings

Fig. 1 is this utility model structural representation;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 has the spacing this utility model structural representation of jump ring;

Fig. 4 is that the A-A of Fig. 3 is to view;

Wherein, 1 needle point, 2 axial grooves, 3 nook closing members, 4 needle guards, 5 graduation marks, 6 support sets, 7 jump rings, 8 pressing plates, 9 openings.

The specific embodiment

As figure, be a kind of biopsy needle, comprise nook closing member 3 coaxial setting and that match and needle guard 4, be provided with axial groove 2 near the nook closing member end on the nook closing member 3, needle guard 4 ends are the cutting edge that inwardly shrinks, described nook closing member 3 ends, be that needle point 1 is made up of tapered three crossing inclined planes, wherein two inclined plane 1a and 1b axially are symmetrical arranged along nook closing member, the intersection of these two symmetric inclined plane 1a and 1b from the vertex of a cone forward, extend downward the edge of nook closing member 3, the 3rd inclined plane 1c from the vertex of a cone backward, extend upwardly to nook closing member 3 edges; Cutting edge on the needle guard 4 is an angular cut; Be set with jump ring 7 on the needle guard 4, the two ends of jump ring 7 are respectively equipped with into the pressing plate 8 that angle is provided with, jump ring 7 is arranged in the support set 6, the head and the tail two ends of jump ring 7 are stretched out and are connected with pressing plate 8 from support set 6 lateral openings 9, hands pinches two pressing plates 8, jump ring 7 is unclamped, and jump ring 7 and support set 6 can slide on needle guard 4, the spacing position during the scalable puncture; Be the indication paracentesis depth, described trocar is provided with some graduation marks 5.

Claims

1, a kind of biopsy needle, comprise nook closing member coaxial setting and that match and needle guard, be provided with axial groove near the nook closing member end on the nook closing member, the needle guard end is the cutting edge that inwardly shrinks, it is characterized in that: described nook closing member end comprises tapered three crossing inclined planes, wherein two inclined planes axially are symmetrical arranged along nook closing member, the intersection on described two symmetrically arranged inclined planes from the vertex of a cone forward, extend downward the nook closing member edge, the 3rd inclined plane from the vertex of a cone backward, extend upwardly to the nook closing member edge.

2, a kind of biopsy needle according to claim 1 is characterized in that: the cutting edge on the described needle guard is an angular cut.

3, a kind of biopsy needle according to claim 1 and 2, it is characterized in that: be set with jump ring on the described needle guard, the two ends of jump ring are respectively equipped with into the pressing plate that angle is provided with, and jump ring is arranged in the support set, and the head and the tail two ends of jump ring are stretched out and are connected with pressing plate from the lateral opening of support set.

4, a kind of biopsy needle according to claim 4, it is characterized in that: described trocar is provided with some graduation marks.