CN202843727U - Angle variable tine bifurcating needle core - Google Patents

Abstract

Translated fromChinese

本实用新型涉及一种可变角尖齿分叉针芯，可变角尖齿分叉针芯由形状记忆合金制作的尾端为针栓和针管(1)、针管前端的分叉(2)和分叉前方的可随温度变化而变成钩齿(4)的尖齿组成。该针芯在机体外(偏离机体温度的高温或低温下)呈现分叉和尖齿呈稍向外伞形张开的直线状态；而穿刺到机体内并停留一段时间当针芯的温度接近机体温度(30℃～45℃)时可变角尖齿分叉针芯的分叉合拢为管状、分叉前方的尖齿弯曲成为钩齿的状态。

The utility model relates to a needle core with variable angle tines and forks. The needle core with variable angle tines and forks is made of a shape memory alloy, and the tail end is a needle pin and a needle tube (1), and a fork at the front end of the needle tube (2). It is composed of tines that can become hook teeth (4) in front of the bifurcation as the temperature changes. The needle core outside the body (at a high temperature or low temperature away from the body temperature) presents a straight line with bifurcations and tines that open slightly outward in an umbrella shape; and when the needle core temperature is close to the body At a temperature (30°C to 45°C), the forks of the variable-angle tine bifurcated needle core are closed into a tubular shape, and the tines in front of the fork are bent into a state of hook teeth.

Description

A kind of variable angle pointed tooth bifurcated nook closing member

Technical field

This utility model relates to a kind of variable angle pointed tooth bifurcated nook closing member, and this nook closing member is simple in structure, and volume is little, can use separately also to cooperate corresponding puncture needle sleeve pipe or fiber duct to carry out biopsy, sampling or Minimally Invasive Surgery.

Background technology

At present, the used nook closing member of a lot of Minimally Invasive Surgerys and biopsy needle is difficult to tissue is taken out of external; Even special-purpose biopsy needle not only once can only be got one time sample, and often failure, the success of secondary and even repeatedly puncture ability.Articulated biopsy forceps volume is too large.In order to overcome the traumatic large limitation of existing biopsy forceps, we have designed a kind of variable angle pointed tooth bifurcated nook closing member, this variable angle pointed tooth bifurcated nook closing member is simple in structure, volume is little, one-time puncture can be taken a sample repeatedly, various biopsy forcepss, biopsy needle be can replace, also can biopsy sampling, Minimally Invasive Surgery and industrial hollow out be carried out for various fiber ducts or chamber mirror.

Summary of the invention

The technical scheme that its technical problem that solves this utility model adopts is: can vary with temperature the characteristics that its shape can change when reaching specific transformation temperature according to marmem, design and a kind ofly made by shape memory alloy material, pintle and needle tubing by tail end, the bifurcated of needle tubing front end, can vary with temperature the variable angle pointed tooth bifurcated nook closing member that auto Deformation is the pointed tooth composition of pointed tooth inflection with bifurcated the place ahead, transformation temperature when becoming the bill tooth according to pointed tooth is different, be divided into transformation temperature and be lower than the cold-hot distortion variable angle pointed tooth bifurcated nook closing member of organism temperature and the heat that transformation temperature is higher than organism temperature-cold deformation variable angle pointed tooth bifurcated nook closing member two classes, variable angle pointed tooth bifurcated nook closing member can use separately and also can cooperate corresponding puncture needle sleeve pipe or fiber duct to use.

The transformation temperature of cold-hot distortion variable angle pointed tooth bifurcated nook closing member is any one temperature (preferred 0 ℃～30 ℃) that is lower than organism temperature (＜37 ℃), every when being lower than transformation temperature, bifurcated and the pointed tooth of cold-hot distortion variable angle pointed tooth bifurcated nook closing member are the linear state that outwards opens, and be every when being higher than transformation temperature: the bifurcated of cold-hot distortion variable angle pointed tooth bifurcated nook closing member front end draws the pointed tooth that becomes tubulose, bifurcated the place ahead in and automatically becomes and be bent inwardly into pointed tooth inflection shape; The transformation temperature of heat-cold deformation variable angle pointed tooth bifurcated nook closing member is any one temperature (preferred 45 ℃～60 ℃) that is higher than organism temperature (＞37 ℃), every when being higher than transformation temperature: bifurcated and the pointed tooth of heat-cold deformation variable angle pointed tooth bifurcated nook closing member are the linear state that outwards opens, every when being lower than transformation temperature, the bifurcated of heat-cold deformation variable angle pointed tooth bifurcated nook closing member front end draws the pointed tooth that becomes tubulose, bifurcated the place ahead in and automatically becomes and be bent inwardly into pointed tooth inflection shape.

The making of cold-hot distortion variable angle pointed tooth bifurcated nook closing member is to calcine under the high temperature greater than 400 ℃ martensitic phase transformation, and then quenching strengthening, form cold-hot distortion variable angle pointed tooth bifurcated nook closing member front end bifurcated and draw the pointed tooth inflection shape that becomes tubulose, bifurcated the place ahead in, when being lower than transformation temperature, become bifurcated and pointed tooth is the linear state that outwards opens with the processing of variable angle pointed tooth bifurcated nook closing member is moulding again; The making of heat-cold deformation variable angle pointed tooth bifurcated nook closing member is to calcine under the high temperature greater than 400 ℃ martensitic phase transformation, and then quenching strengthening, the bifurcated and the pointed tooth that form heat-cold deformation variable angle pointed tooth bifurcated nook closing member are the linear state that outwards opens, and are processed into the pointed tooth inflection shape that the front end bifurcated draws in becomes tubulose, bifurcated the place ahead at the variable angle pointed tooth bifurcated nook closing member that is lower than under the transformation temperature heat-cold deformation.

In sum: two class variable angle pointed tooth bifurcated nook closing member operation principles all are to depart from outside body under the high temperature or low temperature state of organism temperature, and bifurcated and the pointed tooth of variable angle pointed tooth bifurcated nook closing member are the linear state that outwards opens; And arrived in the body, etc. the temperature of variable angle pointed tooth bifurcated nook closing member during progressively near organism temperature (30 ℃～45 ℃), variable angle pointed tooth bifurcated nook closing member can automatically become the front end bifurcated and draw in the pointed tooth that becomes tubulose, bifurcated the place ahead and curve pointed tooth inflection shape.

The beneficial effects of the utility model are: utilize two kinds of shapes of pointed tooth and pointed tooth inflection in the characteristic that transformation temperature changes mutually up and down, it is minimum to have designed volume, can repeatedly take a sample, can be used in the variable angle pointed tooth bifurcated nook closing member of puncture needle and fibrescope.So developing easily, metal variable the top of the horn tooth bifurcated nook closing member can under the guiding of iconography, accomplish accurate operation.

Description of drawings

Below in conjunction with drawings and Examples this utility model is further specified (take cold-hot distortion variable angle pointed tooth bifurcated nook closing member as example):

Fig. 1 is the shape of variable angle pointed tooth bifurcated nook closing member when external: when the temperature of variable angle pointed tooth bifurcated nook closing member is lower than transformation temperature, and the linear state that the pointed tooth (3) in the bifurcated of its front end (2) and bifurcated the place ahead linearly outwards opens.

Fig. 2 is the shape of variable angle pointed tooth bifurcated nook closing member during in vivo near organism temperature, the aduncate process of pointed tooth in variable angle pointed tooth bifurcated nook closing member bifurcated the place ahead.

Fig. 3 is that variable angle pointed tooth bifurcated nook closing member closes up when identical with organism temperature in vivo and becomes tubulose.

Among the figure: 1. the pintle of tail end and needle tubing; 2. the bifurcated of needle tubing front end; At the pointed tooth on external (departing under the high temperature or low temperature of organism temperature) variable angle pointed tooth bifurcated nook closing member bifurcated top towards the place ahead; 4, the pointed tooth on variable angle pointed tooth bifurcated nook closing member bifurcated top in vivo near organism temperature the time become the pointed tooth inflection.

The specific embodiment

Embodiment 1: see among Fig. 1, take cold-hot distortion variable angle pointed tooth bifurcated nook closing member as example: when variable angle pointed tooth bifurcated nook closing member has just arrived target, its shape also remains on the shape that is lower than transformation temperature: namely the pointed tooth (3) on the bifurcated (2) of variable angle pointed tooth bifurcated nook closing member and bifurcated top is the linear state that slight umbrella shape is opened, apply certain external force at the nook closing member tail end and promote this moment, the bifurcated of variable angle pointed tooth bifurcated nook closing member thrusts in the target under the guiding of pointed tooth forwardly, and with the sample double team in the target between the nook closing member bifurcated.

Embodiment 2: see Fig. 3, after the step offinishing embodiment 1, cold-hot distortion variable angle pointed tooth bifurcated nook closing member stays for some time in target, the nook closing member temperature is identical with organism temperature, variable angle pointed tooth bifurcated nook closing member is deformed into bifurcated and closes up and be tubulose, thereby sample is encircled in the tube chamber between bifurcated, the pointed tooth on bifurcated top is bent to form pointed tooth inflection (4) shape to the nook closing member axis simultaneously, with nook closing member closure of openings foremost, be clipped in sample in the bifurcated and be cut and be wrapped in nook closing member inside and be not easy to come off, thereby take out of external with nook closing member.

Claims (3)

Translated fromChinese

1.一种可变角尖齿分叉针芯，其特征是：可变角尖齿分叉针芯为形状记忆合金材料制作的由尾端的针栓和针管(1)、针管前端的分叉(2)、和分叉前方可以随温度变化自动变形为内弯的尖齿(3)组成，根据尖齿变为钩尖齿时的变态温度不同，分为变态温度低于机体温度的冷-热变形可变角尖齿分叉针芯和变态温度高于机体温度的热-冷变形可变角尖齿分叉针芯两类。1. A variable-angle tine bifurcated needle core is characterized in that: the variable-angle tine bifurcated needle core is made of a shape memory alloy material and is made of a needle pin at the tail end and a needle tube (1), and a bifurcation at the front end of the needle tube (2), and the front of the bifurcation can be automatically deformed into inwardly curved tines (3) with temperature changes. According to the difference in metamorphosis temperature when the tines change into hook tines, it is divided into cold - There are two types of heat-deformable variable-angle tine bifurcated needle cores and heat-cold deformation variable-angle tine bifurcated needle cores whose metamorphosis temperature is higher than the temperature of the body.2.根据权利要求1所述的可变角尖齿分叉针芯，其特征是：冷-热变形可变角尖齿分叉针芯的变态温度是低于机体温度＜37℃的任何一个温度，凡是低于变态温度时，冷-热变形可变角尖齿分叉针芯的分叉和尖齿呈向外张开的直线状态，凡是高于变态温度时，冷-热变形可变角尖齿分叉针芯前端的分叉(2)收拢成为管状、分叉前方的尖齿自动变为向内弯曲成尖齿内弯(4)形状。2. The variable angle tine bifurcated needle core according to claim 1, characterized in that: the metamorphosis temperature of the cold-thermal deformation variable angle tine bifurcated needle core is any one lower than the temperature of the body < 37°C When the temperature is lower than the metamorphosis temperature, the cold-heat deformation can be changed. The bifurcation (2) at the front end of the bifurcated needle core of the angular tines is gathered into a tubular shape, and the tines in front of the bifurcation automatically become inwardly bent into the shape of the tine inward bending (4).3.根据权利要求1所述的可变角尖齿分叉针芯，其特征是：热-冷变形可变角尖齿分叉针芯的变态温度是高于机体温度＞37℃的任何一个温度，凡是高于变态温度时，热-冷变形可变角尖齿分叉针芯的分叉和尖齿呈向外张开的直线状态，凡是低于变态温度时，热-冷变形可变角尖齿分叉针芯前端的分叉(2)收拢成为管状、分叉前方的尖齿自动变为向内弯曲成尖齿内弯(4)形状。 3. The variable-angle tine bifurcated needle core according to claim 1, characterized in that: the metamorphosis temperature of the variable-angle tine bifurcated needle core deformed by heat-cold deformation is higher than any temperature of the body > 37°C When the temperature is higher than the metamorphosis temperature, the heat-cold deformation can be changed. The bifurcation (2) at the front end of the bifurcated needle core of the angular tines is gathered into a tubular shape, and the tines in front of the bifurcation automatically become inwardly bent into the shape of the tine inward bending (4). the

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