Utility model content
The utility model provides a kind of simpler tissue samples acquisition device of sampling and medical instrument.
To achieve the goals above, the utility model adopts the technical scheme that
According to the one aspect of the utility model, a kind of tissue samples acquisition device, tissue samples acquisition device are providedInclude: shell, there is hollow inner cavity；Syringe needle, is fixed at the front end of shell, and syringe needle has hollow lumen, the needle of syringe needleTip is closed end, and syringe needle has the lateral openings being connected to hollow lumen close to needle tip；Rotary-cut pipe is coaxially set with syringe needleIt sets, and is extended in the inner cavity of shell by the hollow lumen of syringe needle, the initial bit that there is rotary-cut pipe cut end to get out of the way lateral openingsIt sets, and is threadingly advanced and at least partly blocks the cutting position of lateral openings from initial position to needle tip；Fluid passage, liquidBody channel includes the extension channel that housing rear end is extended to from the front end of shell, after the rear end of shell is provided with and extends channelEnd connects and the fluidic interface for connecting fluid Supplying apparatus；Extend the front end in channel and the outer wall and inner needle wall of rotary-cut pipeBetween gap connection；Organization and collecting room, is arranged in the rear end of shell, organization and collecting room include the import being connected to rotary-cut pipe andThe outlet being connected to vacuum plant.
Further, the front end for extending channel passes through the gap between interconnection and the outer wall and inner needle wall of rotary-cut pipeConnection.
Further, housing forward end has connector, and connector is fixedly connected with syringe needle；Have on connector along rotary-cut pipeCircumferential direction extend, and aperture be greater than rotary-cut pipe outside diameter axially extending bore；Axially extending bore close to the inner cavity of shell one end withThe cooperation of the rotary-cut seal of tube；Interconnection is connected to axially extending bore.
Further, there is cross through hole on connector；Interconnection includes setting in housing forward end, and and cross through holeThe connection cover on link slot is closed with lid with the link slot that channel is connected to is extended.
Further, connector and case bonding；Connection cover is Nian Jie with shell and connector.
Further, connector is Nian Jie with syringe needle or is threadedly coupled.
Further, connector includes double end seat and thread bush；The first end of double end seat is connect with case bonding；Thread bushThe second end of double end seat is set；Syringe needle includes needle tubing and needle holder, is provided in needle holder outer with thread bush sealing cooperationScrew thread.
Further, needle holder include have it is externally threaded be threadedly engaged body and with the reinforcement that is threadedly engaged body and is fixedly connectedBody；Intensive aspect includes the reinforcement fin at the position connected positioned at needle tubing with needle holder.
Further, shell, syringe needle and rotary-cut pipe are all made of magnetic compatible material.
The utility model additionally provides a kind of medical instrument, including tissue samples acquisition device above-mentioned.
In conclusion tissue samples acquisition device according to the present utility model and medical instrument, by the way that fluid passage is arrangedAnd organization and collecting room, when sampling, by starting the vacuum plant being connected to organization and collecting room, so that in fluid Supplying apparatusLiquid (such as physiological saline) by between fluid passage, rotary-cut pipe and syringe needle gap and from the lateral openings of syringe needleIt enters rotary-cut pipe and is flowed into tissue collecting room, during liquid flowing, biopsy sample band that rotary-cut pipe is cut downEnter to organization and collecting room, to facilitate taking-up sample.
Specific embodiment
It is practical new to this below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearerType embodiment is described in further detail.
As shown in Fig. 1 to Fig. 8 the utility model provides a kind of tissue samples acquisition device, comprising: tissue samples acquisition dressSetting includes: shell 10, has hollow inner cavity；Syringe needle 20, is fixed at the front end of shell 10, and syringe needle 20 has hollow tubeChamber, the needle tip of syringe needle 20 is closed end, and syringe needle 20 has the lateral openings 21 being connected to hollow lumen close to needle tip；RotationPipe Cutting 30 is coaxially disposed with syringe needle 20, and is extended to by the hollow lumen of syringe needle 20 in the inner cavity of shell 10, and rotary-cut pipe 30 hasCut end gets out of the way the initial position of lateral openings 21, and is threadingly advanced from initial position to needle tip and at least partly blocks sideTo the cutting position of opening 21；Fluid passage 80, fluid passage 80 include that 10 rear end of shell is extended to from the front end of shell 10Extend channel 81, the rear end of shell 10, which is provided with, to be connect with the rear end for extending channel 81 and be used to connect the liquid of fluid Supplying apparatusBody interface；The front end for extending channel 81 is connected to the gap between 20 inner wall of the outer wall of rotary-cut pipe 30 and syringe needle；Organization and collecting room60, the rear end of shell is set, and organization and collecting room 60 includes the import being connected to rotary-cut pipe 30 and what is be connected to vacuum plant go outMouthful.The tissue samples acquisition device of the utility model when sampling, is passed through by setting fluid passage 80 and organization and collecting room 60Start the vacuum plant being connected to organization and collecting room, so that the liquid (such as physiological saline) in fluid Supplying apparatus passes throughGap between fluid passage, rotary-cut pipe and syringe needle simultaneously enters rotary-cut pipe from the lateral openings of syringe needle and is flowed into tissueIn collecting chamber 60, during liquid flowing, the biopsy sample that rotary-cut pipe is cut down is brought into organization and collecting room, thus convenientTake out sample.In addition, anesthetic or other drugs can also be passed through in fluid passage, to realize corresponding function.
Generally, organization and collecting room 60 uses transparent material, convenient for observation, is fixed on shell 10 using dismountable designRear end, convenient for take out cutting under material.As shown in connection with fig. 8, fluid passage 80 includes extending to shell from the front end of shell 10The extension channel 81 of 10 rear end of body, the rear end of shell 10 is provided with to be connect with extension channel 81, and for connecting liquid supply dressThe fluidic interface set, the front end for extending channel is connected to by the gap between lateral duct 82 and rotary-cut pipe 30 and syringe needle 20, horizontalIt is to extend channel 83 in Fig. 6 and worn in parallel to housing forward end from housing rear end and rotary-cut pipe 30, and lead to the outlet of pipeline 82The gap crossed between a bit of interconnection and rotary-cut pipe 30 and syringe needle 20 is connected to, and is extended channel parallel arrangement, is facilitated entire shellInternal portion Structural assignments.Total interface is all arranged to the tail portion for arriving shell 10 by setting extension channel 81, on the one hand facilitates companyConnect various pipelines；On the other hand, also facilitate operation, avoid using be pipeline formed interference.In use, by taking physiological saline as an example,Fluid passage is connected by fluid pipeline 2 and feedway such as bag of saline；Vacuum plant passes through vacuum pipe 3 and organization and collecting room60 outlet connection.
Specifically, as shown in connection with fig. 6, housing forward end has connector, and connector is fixedly connected with syringe needle；Have on connectorThere is the circumferential direction extension along rotary-cut pipe 30, and aperture is greater than the axially extending bore of 30 outer diameter of rotary-cut pipe, i.e. rotary-cut pipe 30 from axial directionIt is inserted into syringe needle in through-hole.Axially extending bore cooperates close to one end of the inner cavity of shell and the sealing of rotary-cut pipe 30, to prevent liquidBody enters inside shell 10.Interconnection is connected to axially extending bore, so that fluid passage and rotary-cut pipe 30 and syringe needle 20Between gap connection.
More specifically, having cross through hole on connector；Interconnection includes setting in housing forward end, and and cross through holeThe connection cover on link slot is closed with lid with the link slot that channel is connected to is extended, fixes the side for forming channel again using split settingsFormula facilitates processing.Generally, connector and case bonding, connection cover and shell and connector are also by the way of Nian Jie, simplyIt is convenient.
In addition, connector can also be by the way of Nian Jie with syringe needle, i.e., syringe needle 20 includes needle holder, and needle holder is directly viscousFixation is connect, fluid passage is connected to the inner cavity of needle holder.
Certainly, connector and syringe needle can also facilitate placement marker using the removablies such as being threadedly coupled.In conjunction with figureShown in 5 and 6, when a threaded connection is used, connector is double end seat 70, the axially extending through bore that double end seat 70 has, rotary-cut pipe30 wear in through-holes, and fluid passage is connected to through-hole；The first end of double end seat 70 is fixedly connected with shell 10, and the of through-holeOne end and rotary-cut pipe 30 are cooperated by the sealing of sealing ring 72, to prevent liquid from entering inside shell 10.Syringe needle 20 includes needleHeadstock, needle holder include being threadedly engaged body 23 and intensive aspect 22, and the second end and needle holder of double end seat 70 are tightly connected.SpecificallyGround, the second end of double end seat are provided with thread bush 71, and thread bush 71 is fastenedly connected with body 23 is threadedly engaged, at the end of the two cooperationIt is provided with sealing ring 73 on face, so that liquid be prevented to be leaked to outside, liquid is made to be limited in the outer wall and needle of rotary-cut pipe 30 in this wayIn gap between first 20 inner wall.
More specifically, the needle tubing of syringe needle 20 and being threadedly engaged body 23 and intensive aspect 22 can be by glue bond, intensive aspect 22The root that reinforcement fin including being located at the position that needle tubing is connected with needle holder, i.e. reinforcement fin are located at needle tubing, on the one hand canNeedle tubing is protected, prevents from bending；On the other hand, when installing syringe needle, reinforce fin also aspect clamping, convenient for improving screwing force.It is doubleIt can also can according to need fixed with double end seat or separate by glue bond, needle holder between headstock 70 and shell.
Generally, in conjunction with shown in Fig. 1 to 8, tissue samples acquisition device further includes the driving machine for driving rotary-cut pipe 30 to moveStructure.Driving mechanism includes rotary drive mechanism 40 and translational drive mechanism 50, and rotary drive mechanism 40 is arranged in shell 10It in chamber, and is that rotation axis drives rotary-cut pipe 30 to rotate with rotary-cut pipe 30；Translational drive mechanism 50 has and rotary-cut pipe 30 and arrangesThe sliding rail set, and rotary-cut pipe 30 and/or 40 translational motion of rotary drive mechanism are driven along sliding rail.
In the course of work, the shearing force that rotary-cut pipe 30 is generated using the movement velocity and rotation of itself is in tissue and rotary-cut pipe30 front ends cutting edge contact position generate pressure, and tissue is forced to isolate.The cutting edge of rotary-cut pipe 30 is general sharp enough, and the speed of movement is wantedFast as far as possible, so that the time used in cutting process shortens as far as possible, the purpose of rotation is when cutting proceeds to middle sectionResection organization, which may occur, can hinder the cutting of rotary-cut pipe 30, can be to avoid the problem using rotation.
The sliding rail of translational drive mechanism 50 is arranged side by side with rotary-cut pipe 30, compared with prior art, can effectively subtractFew structure occupied space, reduces number of parts and complexity, thus keep tissue samples acquisition device structure simpler, movement portionDivide less, easy to process and assembling.
Specifically, the inner cavity of shell 10 includes the first chamber 11 and second chamber of left-right situs and the connection that is parallel to each other12, i.e. the cross section of chamber is substantially in the figure of eight, and rotary drive mechanism 40 is arranged in first chamber 11, translational drive mechanism50 are arranged in second chamber 12, and rotary drive mechanism 40 and translational drive mechanism 50 pass through the connected component between two chambersMating reaction, so that finally driving rotary-cut pipe 30 is threadingly advanced.
As shown in Fig. 5 to 8, rotary drive mechanism 40 includes the air motor driven by high-pressure air source, air motor packetThe rotor of the shell being arranged in first chamber 11 and setting inside the housing is included, rotary-cut pipe 30 and the armature spindle of air motor are sameHeart connection, rotor can also be fixed on rotary-cut pipe 30.Translational drive mechanism 50 includes the shell translation of driving air motorPiston mechanism.I.e. piston mechanism drives entire air motor and the translational motion together of rotary-cut pipe 30, during translational motion,Rotary-cut pipe 30 is driven to rotate by air motor, to realize that rotary-cut pipe 30 is threadingly advanced.
More specifically, being set in as shown in figure 5, piston mechanism includes the slide bar 51 being fixed in second chamber 12On slide bar 51 and along the piston bush 52 of the opposite sliding of slide bar 51, and positioned at 52 inside of piston bush and it is fixed on slide bar 51Piston portion 53；Piston bush 52 has the first end close to syringe needle 20 and the second end far from syringe needle 20, the first end of piston bush 52Be slidingly sealed with slide bar 51, the periphery of piston portion 53 and the inner wall of piston bush 52 be slidingly sealed with the first end of piston bush 52 withPlunger shaft 54 is formed between piston portion 53, plunger shaft 54 has the air source inlet 55 connecting with high-pressure air source；I.e. by pistonInject high pressure gas in chamber 54, thus drive piston bush 52 with slide bar 51 for sliding rail sliding, by the shell of air motor withPiston bush 52 connects, and can drive air motor translational motion by piston bush 52.Piston bush 52 may be arranged as one pairPipe structure, one of pipe are 52 part of piston bush for forming translational motion, shell of another pipe as air motor, namelyThe shell of piston bush 52 and air motor is integrally formed.
Preferably, piston mechanism further includes reset spring 56, and reset spring 56 is set on slide bar 51, and both ends respectively withThe second end of piston portion 53 and piston bush 52 abuts, and high-pressure air source drives in 52 motion process of piston bush, compression reseting spring 56,When air pressure declines in plunger shaft 54, reset spring 56 drives piston bush 52 to reset, and has structure simple, without control, automaticallyThe characteristics of reset.It is of course also possible to form another cunning by being slidingly sealed the second end of piston bush 52 also with slide bar 51The reseting cavity of dynamic sealing, and by realizing that piston bush 52 is mobile and resets to plunger shaft 54 and reseting cavity switching inflation.
It is highly preferred that slide bar 51 has axially extending hollow air supply channel, air source inlet 55 is arranged on slide bar 51 simultaneouslyIt is connected to hollow air supply channel, is provided on shell 10 and is connected to hollow air supply channel, and for connecting high-pressure air source pipelineFirst connecting interface.I.e. external high-pressure air source is connected to by hollow air supply channel on slide bar 51 with plunger shaft 54, in gas circuitAll components are fixed, so that the movement of piston bush 52 effectively be avoided to impact gas supply, guarantee reliability.
As shown in connection with fig. 7, it is additionally provided on shell 10 and is connected to the air inlet 41 of air motor, and for connecting high pressure gasSecond connecting interface in source capsule road；Specifically, the tracheae extended into shell can be set at second interface, be arranged on tracheae and connectValve 42 is connect, connection valve 42 is connect by corresponding hose with air inlet 41.In use process, the first connecting interface and the second connectionInterface is connect with corresponding supply air line (the first gas circuit 1 and the second gas circuit 4), and is controlled by corresponding control switch, Ji KeshiNow supplied to plunger shaft 54 and air motor.Furthermore, it is contemplated that air motor and piston mechanism have centainly in use processSimultaneity, it may be considered that supplied simultaneously using a pipeline.I.e. the air inlet 41 of air motor is connected by gas source branch and firstConnection interface connection can make the circulation of hollow air supply channel furthermore, it is contemplated that air motor and piston mechanism need tolerance differentThe tolerance that the circulation area of area and gas source branch is needed according to the two is in preset ratio relationship.
The one action process of the tissue samples acquisition device of the utility model is illustrated in conjunction with Fig. 5 to Fig. 8.
Three in four pipelines, respectively the first of connection translational drive mechanism 50 and high-pressure air source are shown in Fig. 5Pipeline 1, and the liquid line 2 of connection fluid Supplying apparatus, connect the vacuum line 3 of vacuum plant and organization and collecting room 60.
Compressed air is passed through in first pipeline 1, compressed air enters plunger shaft 54 by air source inlet 55 and pushes piston52 movement of set, piston portion 53 is fixed together with slide bar 51 and does not move here, since plunger shaft 54 is in the effect of compressed airLower expansion forces piston bush 52 to move to 20 direction of syringe needle.
Its tip of syringe needle 20 is taper, organization internal is inserted into for penetrating tissue convenient for needle tubing, after syringe needle 20Tissue to be cut can be drawn by the notch of Fang Youyi segment length, i.e. lateral openings 21, the notch under the action of negative pressureInside lateral openings 21, and tissue is separated under the cooperation of the cutter in rotary-cut pipe 30 with human body, achievees the purpose that cutting tissue.
Rotary-cut pipe 30 is the thin-wall tube for cutting tissue, be inserted into hollow pinhead 20, two between have certain gap,Gap herein is the channel that liquid passes through.Rotary-cut pipe 30 makes its end have a sword close to 20 one end of syringe needle by grinding processingFace, it is sharper.Rotary-cut pipe 30 and the rotor of air motor link together.
30 other end of rotary-cut pipe leads to organization and collecting room 60, and the effect of vacuum plant is woven in by the group that rotary-cut pipe 30 is cutIt is saved in lower sucking organization and collecting room 60.There are two freedom degrees for the tool of rotary-cut pipe 30, for translation freedoms in axial direction and are somebody's turn to doThe rotary freedom of axis.Rotary-cut pipe 30 is threadingly advanced during resection organization.
Organization and collecting room 60 saves function as storage in cutting tissue.In the operation for placing marker within the organization,Organization and collecting room 60 can be removed, be put into marker to human body from rotary-cut pipe 30.Organization and collecting room 60 is generally transparent material,Operator is facilitated to observe resection organization's situation.
Drive the compressed air line system of air motor as shown in Figure 7.In Fig. 7, the air inlet 41 of air motor withCompressed air outlet 42 (connection valve) is connected by a hose, and two end interface of hose meets compressed air interface standard.
The fluid passage process of circulation is illustrated so that physiological saline realizes transport as an example, other liquid are similar.Physiology saltWater is entered by liquid line as shown in figure 8, being entered inside syringe needle 20 by 20 junction of syringe needle, 30 outside of rotary-cut pipe, physiology saltWater flow to 20 gap portions of syringe needle along the gap between syringe needle 20 and rotary-cut pipe 30, is entered in rotary-cut pipe 30 by gap portionsPortion, as shown in 20 partial schematic diagram of Fig. 3 syringe needle.Physiological saline passes sequentially through organization and collecting room 60 and corresponding by rotary-cut pipe 30Pipeline eventually enters into vacuum tank and realizes recycling.The effect of physiological saline here is transport, can be in rotary-cut pipe 30 after cutting tissueInterior temporary, physiological saline can move under the action of vacuum according to above-mentioned path, while the tissue cut at syringe needle 20 being transportedIt is defeated to arrive in organization and collecting room 60.Rotary-cut pipe 30 can be cleaned simultaneously, is prepared for cutting tissue next time.
It should be noted that shell 10, syringe needle 20, rotary-cut pipe 30, rotary drive mechanism 40 and translational drive mechanism 50 are equalUsing magnetic compatible material.So that in use, the method that MRI radiography can be used in doctor.Generally, in order to guaranteeEntire tissue samples acquisition device does not have ferromagnetic material, and plastics can be used in structural member, and titanium alloy can be used in 20 part of syringe needle,Make MRI compatibility in this way.Its use equally is nor affected in ultrasound and CT, thus expands the scope of application of product.
The utility model additionally provides a kind of medical instrument, including tissue samples acquisition device above-mentioned, specific structure letterSingle, at low cost feature.
Above description is only a specific implementation of the present invention, under the above-mentioned introduction of the utility model, this fieldTechnical staff can carry out other improvement or deformation on the basis of the above embodiments.It will be understood by those skilled in the art thatAbove-mentioned specific descriptions only preferably explain the purpose of this utility model, and the protection scope of the utility model should be with claimProtection scope subject to.