CN201042438Y

CN201042438Y - Externally fixed semi-automatic tissue aspiration biopsy device

Info

Publication number: CN201042438Y
Application number: CNU2007200317375U
Authority: CN
Inventors: 宋永春; 陈楠
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-04-30
Filing date: 2007-04-30
Publication date: 2008-04-02
Anticipated expiration: 2017-04-30

Abstract

The utility model relates to a medical biopsy needle which is composed of a shell, a needle assembly, a needle sheath assembly and a fixer. A blocking sheet is fixed on inner wall of the shell. The needle assembly is composed of a needle body, an active shaft, a spring and a pushing-drawing element; wherein end of the needle body is fixed on the pushing-drawing element, one part of the pushing-drawing element is arranged at outside of a barrier of the shell and the other part is arranged in chamber of the shell at inner side of a blocker. The spring is arranged between the two parts of the pushing-drawing element. A plurality of stopping blocks are arranged on outer margin of the pushing-drawing element and spaced in a constant spacer. The needle sheath assembly jackets on the needle body. A clamper is clamped on the active shaft. The fixer is arranged on the shell. The utility model realizes semiautomatic extraction on focus tissue sample and has the advantages of low consumption of labor and time, and rapid, accurate and safe needling.

Description

External fixed semi-automatic tissue penetration biopsy device

Technical field

This utility model relates to a kind of medical equipment, specifically, is the biopsy needle of puncture usefulness.

Background technology

Puncture needle is the at present clinical apparatus of widely using when being used for obtaining some histopathology, is usually used in renal puncture, liver puncture, thyroid puncture, lungs puncture, mammary gland tumor puncture etc.Puncture instrument commonly used at present is the manual type biopsy needle, and it is made of needle assembly and stylophore assembly, and needle assembly is made of the metal needle body and the plastics pull-push piece of band groove, and the stylophore assembly is made of hollow metal tube and plastic handle.During use,, needle assembly is moved forward in the stylophore assembly and insert the lesions position of human body, again the stylophore assembly is advanced, finish cutting then and the lesion tissue specimen is retained in the groove of needle body, biopsy samples is provided by the promotion of hands.Because the moving control of the mobile complete armrest of needle assembly and stylophore assembly, so exist many shortcomings: (1) cutting speed is slow, easily causes historrhexis, causes the biopsy failure; (2) if when cutting be firmly excessive accidentally, might cause to move past before the stylophore assembly deeply, causes malpractice; (3) the stylophore high scale of existing manual biopsy needle can not allow the operator be clear that needle body thrusts the intravital degree of depth of patient, and only with operator's subjective judgment, easily cause certain error very little; (4) amount of taking-up tissue specimen is difficult to grasp, and too much can cause certain injury to the patient, and positive rates of biopsy is low when very few; (5) owing to biopsy needle can't be fixed external, when by machines such as X line CT location, problems such as toppling over, come off easily, and, the operator is exposed under the ray if take manual fixing, harm operator health.

Utility model content the purpose of this utility model is to overcome the shortcoming of existing manual biopsy needle, and a kind of external fixed semi-automatic tissue penetration biopsy device is provided.

This utility model is achieved in that by housing, needle assembly, stylophore assembly and holder to be formed.The stylophore assembly is made of the shackle member of sleeve pipe and sleeve pipe termination.Be fixed with on the inwall of housing and stop sheet, there is plug the housing rear end.Needle assembly mainly by the reeded needle body of front end, be enclosed within movable axis on the needle body and spring, fixedly the needle body pull-push piece of not holding constitutes, movable axis is enclosed within on the needle body, there is a space at the movable axis middle part, fixing a baffle plate on the needle body of this space correspondence, the effect of this baffle plate is: when moving behind the needle body, baffle plate drives movable axis and moves after together, after move to and stop step and stop at and stop on the sheet; During the needle body reach, baffle plate does not drive the movable axis reach.The part of pull-push piece is positioned at the outside of baffle; Another part of this pull-push piece is positioned at the housing intracavity of plug, and spring is housed therebetween, and several equidistant steps that stops to be arranged on the edge outside the pull-push piece.The casing pipe sleeve of stylophore assembly is on needle body, and the shackle member of stylophore assembly and the outer end of movable axis flexibly connect.Holder is installed on the holddown groove of hull outside, and this holder is made up of air bag, connecting rod and sucker.

During use, the target focus that telescopic needle body thrusts human body will be housed at first.When needing fixedly, holder is installed in the outer holddown groove of housing, and holder is fixed on the human body by clutching air bag.Subsequently, pull back pull-push piece, drive movable axis, stylophore assembly and move after together, when on the pull-push piece certain stop step snapping on the inner walls stop on the sheet time, stop post-tensioning, meanwhile the spring in the pull-push piece is compressed.Subsequently, promote pull-push piece forward, needle body gos deep into focal zone, the focus specimen enters the needle body groove, pushes away pull-push piece before continuing then, makes to stop step and push the obstruction that stops sheet open, so, under the effect that is compressed spring release elastic force, the promotion movable axis moves forward fast, thereby finishes the cutting action to the focus specimen in the needle body groove.This utility model has been realized the function of semi-automatic extraction lesion tissue specimen, have quick, accurate, safe, laborsaving, characteristics such as save trouble.

Description of drawings

Generalized section when Fig. 1 is this utility model cutting focus specimen;

Fig. 2 is the local enlarged diagram of the aminoacyl site structure of Fig. 1;

Fig. 3 is the generalized section before this utility model cutting thorn focus specimen;

Fig. 4 is the overall structure sketch map of needle assembly;

Fig. 5 is an overall structure sketch map of the present utility model.

Among the figure, 1 shackle member, 2 buffering aprons, 3 movable axis, 4 springs, 5 housings, 6 pull-push piece, 7 stop sheet, and 8 stop step, 9 needle bodies, 10 grooves, 11 sleeve pipes, 12 baffle plates, 13 fixed mounts, 14 air bags, 15 connecting rods, 16 suckers.

The specific embodiment

Below in conjunction with embodiment of the present utility model of the drawings and specific embodiments narration.

Fig. 1 and Fig. 3 have shown when the sleeve pipe 11 of this utility model cuts specimen respectively and two kinds of fashionable duties of needle body 9 thorns.

Be fixed with on the inwall of housing 5 and stop sheet 7.The left end of housing 5 inner chambers has a buffering apron 2.Pull-push piece 6 is an end " mountain " jaggy character form component, and an end of its breach is positioned at the housing intracavity, and spring 4 is housed, fixing on its surface two at a distance of 10mm stop step 8, the other end of pull-push piece is positioned at outside the housing.Movable axis 3, spring 4 are enclosed within on the needle body, and the needle body end is fixed on the pull-push piece 6.There is a cavity inside of movable axis 3, to being fixed with a baffle plate 12 on the needle body of cavity.The sleeve pipe 11 of stylophore assembly is enclosed within on the needle body, and sleeve pipe is not held and is connected on the shackle member 1, and shackle member 1 is connected together with the outer end of movable axis 3.

Fig. 2 is the local enlarged diagram of the aminoacyl site structure of Fig. 1, has shown that stopping on the housing 5 stops the structural relation between step 8, the spring 4 on sheet 7, the pull-push piece 6.

Fig. 4 is the overall structure sketch map of needle assembly, has shown the annexation between needle body 9 and movable axis 3, spring 4, the pull-push piece 6: the end of needle body 9 is fixed on the pull-push piece 6, and movable axis 3, spring 4 are enclosed within on the needle body 9.There is a space at movable axis 3 middle parts, and a baffle plate 12 is arranged on the needle body 9 of this space correspondence.

Figure 5 shows that this utility model overall structure sketch map.Housing 5 is provided with 3 holddown grooves, and triangle fixed mount 13 is fixed on the holddown groove, and three holders are fixed on this fixed mount 13, and each holder is chained together by air bag 14, connecting rod 15, sucker 16.

The described housing of present embodiment, shackle member, movable axis, stop sheet, stop step, pull-push piece, fixed mount, holder, all adopt ABS plastic to make.

During use, after having determined body foci's inserting needle position, earlier the skin of this correspondence position is carried out disinfection and remove reason, inserting needle is to the target focus then, embeds on the fixed mount of present embodiment after little water or ethanol are stained with in the sucker bottom of holder, subsequently according to concrete depth of needle, slow pulling pull-push piece 6 pulls out 10 or 20mm according to concrete needs, clutches air bag thereupon, after discharging internal gas, sucker is fixed on the human body.Promote pull-push piece 6 then forward, make needle body go deep into focus extracted region specimen, subsequently, promote pull-push piece 6 again forward, sleeve pipe penetrates forward along needle body rapidly thereupon, finishes the work (tissue is stayed in the groove of needle assembly) that cuts and organizes.Remove holder at last and extract needle body.

Claims

1. external fixed semi-automatic tissue penetration biopsy device, it is characterized in that: housing (5), needle assembly, stylophore assembly and holder are arranged, be fixed with on the inwall of housing and stop sheet (7), there is plug an end of housing, and the stylophore assembly is made of sleeve pipe (11) and shackle member (1); Sleeve pipe (11), movable axis (3) and spring (4) are actively set on the needle body, and the end of needle body is fixed on the pull-push piece (6); The opening portion of pull-push piece (6) is positioned at the housing intracavity, and spring (4) is housed therebetween, and several equidistant stop pieces (8) are arranged on the edge outside the pull-push piece, and another part of pull-push piece is positioned at the plug outside; There is a space at the middle part of movable axis (3), to fixing a baffle plate (12) on the needle body (9) at place, space; The shackle member of stylophore assembly (11) flexibly connects with the outer end of movable axis (3).

2. external fixed semi-automatic tissue penetration biopsy device according to claim 1, it is characterized in that: housing is equipped with holder on (5), and this holder is connected in series by air bag (14), connecting rod (15) and sucker (16).