CN203861267U

CN203861267U - Piston cutting type biopsy needle

Info

Publication number: CN203861267U
Application number: CN201420055025.7U
Authority: CN
Inventors: 盛涛; 周晓光; 徐鹏
Original assignee: WANMA GROUP ELECTRONIC CO Ltd ZHEJIANG PROV
Current assignee: Wanma Technology Co ltd
Priority date: 2014-01-27
Filing date: 2014-01-27
Publication date: 2014-10-08
Anticipated expiration: 2024-01-27

Abstract

A piston cutting type biopsy needle comprises a needle core (1), a needle tubing (3), a silicone rubber sealing element (2) and an outer sleeve cutter (4). The needle core (1) is composed of a handle cover (1-1) and a needle core body (1-2) fixedly connected with the handle cover (1-1). The needle tubing (3) is composed of a handle body (3-1) and a tube sleeve (3-2), wherein the handle body (3-1) and the tube sleeve (3-2) are made into a whole. The side face of the front end of the tube sleeve (3-2) is provided with an inlet opening (3-3) of a tongue-shaped cutter (4-2). The outer sleeve cutter (4) is composed of an outer sleeve (4-1) and the tongue-shaped cutter (4-2), wherein the outer sleeve (4-1) extends outwards to form the tongue-shaped cutter (4-2). The needle core body (1-2) is also a piston rod; when the needle core body (1-2) recedes under the sealing action of the silicone rubber sealing element (2), negative pressure is formed on the front segment of the tube sleeve (3-2).

Description

Piston cutting type biopsy needle

Technical field

This utility model relates to a kind of biopsy needle, is specifically related to a kind of piston cutting type biopsy needle, belongs to technical field of medical instruments.

Background technology

At present, negative pressure suction bioassay pin of the prior art, its drawback is to take soft tissue neoplasms tissue in process to be difficult for being taken out from disconnected, and one-time success rate is low, need to carry out repeatedly tumor tissues collection, and repeated localised puncture easily pollutes, totally unfavorable to patient's prognosis.

Utility model content

The purpose of this utility model is to be difficult for being taken out from disconnected in order to solve existing negative pressure suction bioassay pin soft tissue neoplasms tissue in taking process, one-time success rate is low, need to carry out repeatedly tumor tissues collection, repeated localised puncture easily pollutes, the problem totally unfavorable to patient's prognosis, and then a kind of piston cutting type biopsy needle is provided.

The technical solution of the utility model is: piston cutting type biopsy needle comprises pin stamen, needle tubing, trocar sheath cutting knife, silicone rubber seal, described pin stamen forms by handle cover with the affixed nook closing member of handle cover, needle tubing forms by handle body with handle body all-in-one-piece pipe box processed, there is the opening that enters of tongue shape cutting knife the front end side of pipe box, and the tongue shape cutting knife that trocar sheath cutting knife is extended out by trocar sheath and trocar sheath forms.

This utility model compared with prior art has following effect: the opening that enters of the tongue shape cutting knife of the front end side that the tongue shape cutting knife that trocar sheath of the present utility model extends out can be by pipe box is organized from the disconnected soft tissue neoplasms that enters pipe box, can once successfully take out soft tissue neoplasms tissue.This utility model is applicable to various soft tissue neoplasms biopsies.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model, and Fig. 2 is the initial using state figure of this utility model, and Fig. 3 is the working state figure of tongue shape cutting knife 4-2.

The specific embodiment

In conjunction with Fig. 1, Fig. 2, Fig. 3, present embodiment is described, the piston cutting type biopsy needle of present embodiment comprises pin stamen 1, needle tubing 3, silicone rubber seal 2, trocar sheath cutting knife 4, described pin stamen 1 forms by handle cover 1-1 with the affixed nook closing member 1-2 of handle cover 1-1, needle tubing 3 forms by handle body 3-1 with handle body 3-1 all-in-one-piece pipe box processed 3-2, what there was a tongue shape cutting knife 4-2 front end side of pipe box 3-2 enters opening 3-3, and the tongue shape cutting knife 4-2 that trocar sheath cutting knife 4 is extended out by trocar sheath 4-1 and trocar sheath 4-1 forms.Nook closing member 1-2 is also piston rod, and when the sealing function of silicone rubber seal 2 retreats nook closing member 1-2, the leading portion of pipe box 3-2 forms negative pressure.

Using method: in conjunction with Fig. 1, Fig. 2, Fig. 3 illustrates using method of the present utility model, under the initial using state of Fig. 2, puncture, when the tip of nook closing member 1-2 arrives focus edge, retreat nook closing member 1-2, make the leading portion of pipe box 3-2 form negative pressure, pipe box 3-2 continues to penetrate focus, now pathological tissues enters pipe box 3-2, push ahead trocar sheath cutting knife 4, tongue shape cutting knife 4-2 enters opening 3-3, as Fig. 3, 360 degree rotary handle body 3-1, pathological tissues is by from disconnected, hold handle body 3-1 and extract biopsy needle, retreat trocar sheath cutting knife 4, tongue shape cutting knife 4-2 also exits opening 3-3, pushing handle covers 1-1 forward, the tip of nook closing member 1-2 can be released the pathological tissues collecting.

Claims

1. a piston cutting type biopsy needle, what there was a tongue shape cutting knife (4-2) the front end side that it is characterized in that pipe box (3-2) enters opening (3-3), and the tongue shape cutting knife (4-2) that trocar sheath cutting knife (4) is extended out by trocar sheath (4-1) and trocar sheath (4-1) forms.