The content of the invention
It is an object of the invention to overcome weak point of the prior art, and providing a kind of prevents the anti-of blood back flowAdverse current syringe-type vacuum blood collector；It is not likely to produce it is a further object of the present invention to provide a kind of convenient, operating process that exerts a forceRock counterflow-preventing syringe-type vacuum blood collector that is unstable and being easy to operation；Another step purpose of the present invention is to provide a kind of structureMore reasonable and packaging technology preferably slides the syringe-type vacuum blood collector of blood sampling needle stand.
The purpose of the present invention is realized by following approach.
Counterflow-preventing syringe-type vacuum blood collector, including vascular puncture needle tubing, Paracentesis needle holder, blood-collecting needle tube, blood sampling needle stand andA kind of tubular syringe, Paracentesis needle holder core cavity is connected with blood sampling needle stand core cavity and is used as blood sampling passage, and vacuum test tube can be plantedIn the cylindrical cavity at syringe rear portion, its composition is characterized by：It is provided with the blood channel of Paracentesis needle holder or needle stand of taking a blood sampleThe valve for preventing reverse-flow that a kind of anti-Hemostatic Oral Liquid inversely overflows.
So, it can prevent blood sampling from finishing, prick blood band release moment, moment of the vacuum test tube with respect to human body blood sampling siteBlood back flow caused by malleation.
No matter Paracentesis needle holder is integrally fixed on syringe, and still can make sliding retrogressing with respect to syringe can use the present inventionDescribed this technical scheme；Equally, needle stand of no matter taking a blood sample is integrally fixed on syringe, and still can make sliding with respect to syringe retreatsIt can be used as this technical scheme of the present invention.
The purpose of the present invention can also be realized by following approach.
Valve for preventing reverse-flow has multiple choices, and prior art is common, the following is a kind of optimum choice：
Valve for preventing reverse-flow is arranged on blood sampling needle stand, is a kind of diaphragm type one-way valve.
Valve for preventing reverse-flow is arranged on blood sampling needle stand, can prevent blood back flow in the very first time.
Diaphragm type one-way valve is made up of film and fixed ear, diaphragm external diameter be more than the blood channel in blood sampling needle stand and itsLeading flank contacts laminating with the step surface in blood channel, and fixed ear and needle stand of taking a blood sample are affixed, and fixation tongue thereon is pushed down thinFilm one side, diaphragm when swing backward concedes blood channel, pressure balance or malleation to the corresponding another side of film in negative pressureResiled by natural resiliency and touch closing liquid passage with step surface patch.
So, during malleation, even check valve tapping side fluid pressure once more than check valve feed liquor body side pressure, diaphragm byPressure is brought into close contact with needle stand inner chamber baseplane, sealing liquid passage, prevents liquid reverse flow.
The counterflow-preventing syringe-type vacuum blood collector also includes a kind of hose connector, Paracentesis needle holder core cavity and blood sampling needle holder coreChamber is connected by this hose connector.
Paracentesis needle holder be it is a kind of be arranged in syringe inner chamber and the slidably component of displacement, for preventing from being retracted into syringe inner chamberIn puncture needle tubing inversely escape syringe check construction be arranged in the syringe inner chamber before Paracentesis needle holder.
So, the puncture needle tubing after puncture is finished is able to be retracted into syringe inner chamber and limited and wherein not escape in order to avoid piercingHinder other people and cause infection.
Reverse stop into direction and foregoing valve for preventing reverse-flow of this check construction inversely stops identical into direction.
The further optimization of this check construction is：
Check construction is along the circumferential direction uniform and tongue piece and dividing wall that axially extend are constituted, tongue piece by 2-5 piecesRoot is connected with the dividing wall, and dividing wall isolation is enclosed in the cavity beyond tongue piece, and a plurality of tongue pieces form point after closing upHorn shape or cone tip shape, tip-angled shape or cone angle shape are relative with receding into the needle tip in syringe inner chamber backwards.
Two panels tongue piece forms tip-angled shape after closing up, and 3-5 piece tongue pieces form cone tip shape after closing up, and either tip-angled shape is stillCone tip shape, which all has, closes up the effect of closure, and not only needle point is difficult to from closing up the point of closure, inversely pass at angle, and it is this simultaneouslyHolding together closure and reverse pressure effect makes it close up the point of closure, angle construction and dividing wall all the more to the cavity beyond tongue pieceIsolation closing, also makes check construction have preliminary counterflow-preventing effect concurrently.So as to be complemented each other with valve for preventing reverse-flow, imitate counterflow-preventingFruit is more preferably.
The counterflow-preventing syringe-type vacuum blood collector also includes a kind of puncture cursor slide, punctures pushing hands and puncture chute,Needle tubing, Paracentesis needle holder are punctured, cursor slide is punctured and punctures the piercing assembly that a kind of relative syringe of pushing hands composition is slided, cursor slide one is puncturedEnd is connected or Construction integration with Paracentesis needle holder, and the other end is connected through after puncturing chute with the puncture pushing hands outside syringe, is punctured and is slidedGroove is located at syringe side lower part and axially extending along syringe.
Tubular syringe front opening, a kind of process Installation groove B or prolongs vertically from syringe front end or from back end of syringeExtend and lead to puncture chute, puncture cursor slide and inserted from this process Installation groove B and up into puncture chute and thereby, with soft companyThe piercing assembly that adapter connection is finished axially is planted and intussusception with syringe, and syringe front opening is covered with protecgulum.
So, whole piercing assembly band be connected thereto the hose connector finished be able to from the front end of syringe or afterEnd insertion is simultaneously connected with syringe plant, and packaging technology is good.
The process Installation groove B width that cracks is be slightly narrower than the groove width for puncturing chute.
So, by means of the opening and the elasticity of syringe plastic material of process Installation groove B front ends, when mounted by thisKind of elastic deformation opens this mounting process groove B, fills in puncture cursor slide, and the groove width and the arm of puncture cursor slide that puncture chute are wide rightShould, so, process Installation groove B again can be as the prominent card of elasticity of the puncture cursor slide of the smooth sliding in chute is punctured evenWithout closing process Installation groove B in plug afterwards.
To realize that the further object of the present invention makees following optimization：
Blood-collecting needle tube, blood sampling needle stand and blood sampling cursor slide, blood sampling pushing hands composition blood collection assembly, the blood collection assembly is with can be relativeSyringe is slidably mounted on syringe, and blood-collecting needle tube, blood taking needle seat are located in syringe inner chamber, and blood sampling cursor slide passes through barrel sidewallOn the inside and outside connection blood sampling needle stand of blood sampling chute and blood sampling pushing hands, blood sampling pushing hands is located at outside syringe, and blood sampling chute is along syringe axial directionExtension.
During Clinical practice, puncture terminate after vacuum test tube in front thimble tube inner chamber while promote blood sampling to push away backwardHand, not only operating physical force is big but also force is convenient, it is firm to operate for such two-way function operating physical force.
Also include a kind of auxiliary pushing hands, this auxiliary pushing hands is in the way of limiting vacuum test tube and be moved rearwards by the free degree and trueEmpty heparin tube connection, the auxiliary pushing hands is located at the rear of blood sampling pushing hands.
So, grip blood sampling pushing hands and auxiliary pushing hands and impose respectively with the finger of one hand and draw close operation and can easily carry outBlood sampling penetrates operation.
The relative blood sampling pushing hands of the auxiliary pushing hands can be distributed so that homonymy is front and rear face-to-face, can also be distributed before and after upper and lower sides.
The auxiliary pushing hands can be by an annulus and thereon one outward extension fin constitute, internal radius is between heparin tubeBetween outer tube diameter and sealing blood sampling tube plug protective jacket external diameter, its body is inserted in simultaneously from vacuum test tube tail end through the annulusContinue forward until being touched with seal rubber plug protective jacket by touching with seal rubber plug protective jacket.
So, by annulus and seal rubber plug protective jacket breech face touch and preceding push wing piece obtain before pushed away vacuum blood collectionPipe.
Stopping into face and stopping through this with vacuum test tube prevents into face and seal rubber plug in the cylindrical cavity at syringe rear portionThe advance for touching prevention vacuum test tube in guard leading end face.
Stop into after the intervention of face, vacuum test tube is no longer before pushed away during clinical manipulation, needle stand of simply taking a blood sample unidirectionally is retreated, thisWhen auxiliary pushing hands can as blood sampling pushing hands match be easy to take a blood sample pushing hands force.
Syringe inner chamber is provided with three reinforcements, and three reinforcements are evenly distributed and axially extended, after reinforcementEnd face stops into face as vacuum test tube.
Tubular syringe front opening, a kind of process Installation groove A or prolongs vertically from syringe front end or from back end of syringeExtend and lead to blood sampling chute, blood sampling cursor slide is from this process Installation groove A insertions and until enters take a blood sample chute and thereby, blood sampling groupPart and syringe are axially planted and intussusception, the junction of blood sampling needle stand and hose connector or positioned at the leading section of blood sampling needle stand orPositioned at the sidepiece of blood sampling needle stand, syringe front opening is covered with protecgulum.
Syringe front opening, implements hose connector and blood sampling under the visual situation of eyesight and under looser installation environmentThe connection of needle stand.And mounting process groove A setting, it is able to allow blood collection assembly to assemble to finish in advance and assembled again with syringe, makes assemblingManufacturability is greatly improved.
Process Installation groove A groove width of the width be slightly narrower than blood sampling chute of cracking.
So, by means of the opening and the elasticity of syringe plastic material of process Installation groove A front ends, when mounted by thisPlant elastic deformation and open this mounting process groove A, fill in blood sampling cursor slide, and the arm of the groove width for chute of taking a blood sample and cursor slide of taking a blood sample is wide rightShould, so, process Installation groove A again can be as the prominent card of elasticity of the blood sampling cursor slide of the smooth sliding in blood sampling chute evenWithout closing process Installation groove A in plug afterwards.
Blood sampling chute has two, is oppositely arranged on the both sides of syringe, blood sampling cursor slide by two support arms and arc acrossConnect the arc arm composition of two support arms, needle stand is affixed or Construction integration with blood sampling for support arm one end, the other end extend out to throughIt is connected after corresponding blood sampling chute with arc arm or Construction integration.
So, two support arms or so set and arc arm outside syringe, blood sampling needle stand in syringe, three connection or oneClosed-loop configuration is configured to, integral rigidity is good, and left and right support arm in turn ensure that the stability of blood collection assembly sliding.
Laminating corresponding with syringe outer peripheral face on the inside of arc arm.
So, after assembling is finished, blood collection assembly smooth with respect to syringe can be slid not only with syringe one integrated mass and but also making to adoptBlood component is with some sliding dampings, and operating handle is good.
Extend radially outward one of in two support arms, another support arm first extend obliquely upward after again along flat-cutDirection stretches out.
The support arm extended radially outward is simple in construction.And first extend that stretch out again along flat-cut direction can obliquely upwardTo concede one piece of larger space below the support arm, this space can be used for accommodating Paracentesis needle holder component.
In summary, the present invention has the following advantages that compared with prior art：Blood back flow can be prevented.Operating physical force is big and appliesPower is convenient, operation is firm.Rational in infrastructure, packaging technology is good.
Embodiment
Most preferred embodiment：
Reference picture 3 and Fig. 9, counterflow-preventing syringe-type vacuum blood collector, including vascular puncture needle tubing 11, Paracentesis needle holder 12, adoptBlood needle tubing 21, blood sampling needle stand 22, hose connector 3 and a kind of tubular syringe 5, the connection Paracentesis needle holder 12 of hose connector 3 and blood taking needleSeat 22, vacuum test tube 4 can be plugged in the cylindrical cavity at the rear portion of syringe 5, blood-collecting needle tube 21, blood sampling needle stand 22 and blood samplingCursor slide, the blood sampling composition blood collection assembly of pushing hands 25, the blood collection assembly can be slidably mounted on syringe 5 with respect to syringe 5, take a blood sampleNeedle tubing 21, blood sampling needle stand 22 are located in the inner chamber of syringe 5, and blood sampling cursor slide is connected through the blood sampling chute 52 on the side wall of syringe 5 is inside and outsideBlood sampling needle stand 22 and blood sampling pushing hands 25, blood sampling pushing hands 25 are located at outside syringe 5, and chute 52 of taking a blood sample is axially extending along syringe 5.Puncture needlePipe 11, Paracentesis needle holder 12, puncture cursor slide 13 and the puncture composition piercing assembly of pushing hands 14, for preventing from being retracted into wearing in syringe inner chamberThe check construction that pricker pipe inversely escapes syringe 6 is arranged in the syringe inner chamber before Paracentesis needle holder 12, puncture the one end of cursor slide 13 withParacentesis needle holder 12 is connected and integrally constructed, and the other end is connected through after puncturing chute 54 with the puncture pushing hands 14 outside syringe 5, is wornPierce chute 54 and be located at the side lower part of syringe 5 and axially extending along syringe 5.Also include a kind of auxiliary pushing hands 8, this auxiliary pushing hands 8 is with limitThe mode that vacuum test tube 4 processed is moved rearwards by the free degree is connected with vacuum test tube 4, and the auxiliary pushing hands 8 is located at blood sampling pushing hands 25Rear.The relative blood sampling pushing hands 25 of the auxiliary pushing hands 8 can be distributed so that homonymy is front and rear face-to-face, can also be distributed before and after upper and lower sides.It is distributed shown in figure for homonymy is front and rear face-to-face.
Reference picture 8, extension fin 81 is constituted outward for the auxiliary pushing hands 8 one by an annulus 82 and thereon, the internal diameter of annulus 82Between the outer tube diameter of vacuum test tube 4 and the external diameter of sealing blood sampling tube plug protective jacket 42, through the annulus from vacuum blood collectionThe tail end of pipe 4 is inserted in its body and continued forward until being touched with seal rubber plug protective jacket 42 by touching with seal rubber plug protective jacket 42Connect.So, by annulus and the breech face of seal rubber plug protective jacket 42 touch and preceding push wing piece 81 before push away vacuum test tube.
In reference picture 6, the cylindrical cavity at the rear portion of syringe 5 stopping into face with vacuum test tube 4 and through this stop into face withThe advance for touching prevention vacuum test tube 4 of the front end face of seal rubber plug protective jacket 42.The inner chamber of syringe 5 is provided with three reinforcements51, three reinforcements 51 are evenly distributed and axially extended, and reinforcement rear end face stops into face as vacuum test tube 4.Stop into after the intervention of face, vacuum test tube is no longer before pushed away during clinical manipulation, needle stand of simply taking a blood sample unidirectionally is retreated, and now auxiliary is pushed awayHand can as blood sampling pushing hands match be easy to take a blood sample pushing hands force.
Reference picture 4 and Fig. 5, the front opening of tubular syringe 5, a kind of process Installation groove A53 is from the front opening of syringe 5 and along axleLead to extending to blood sampling chute 52, blood sampling cursor slide is inserted from this process Installation groove A53 and up to entering blood sampling chute 52 simultaneouslyThereby, blood collection assembly is axially planted and intussusception with syringe 5, and blood sampling needle stand 22 is located at blood sampling needle stand with the junction of hose connector 322 leading section, the front opening of syringe 5 is covered with protecgulum 9.The process Installation groove A53 width that cracks is be slightly narrower than blood sampling chute 52Groove width.Blood sampling chute 52 has two, is oppositely arranged on the both sides of syringe 5.
Reference picture 7, the arc arm 242 that blood sampling cursor slide bridges two support arms 241 by two support arms 241 and arc is constituted,The one end of support arm 241 is extended out to through after corresponding blood sampling chute 52 with the blood sampling Construction integration of needle stand 22, the other endWith the Construction integration of arc arm 242.The laminating corresponding with the outer peripheral face of syringe 5 of the inner side of arc arm 242.Edge one of in two support arms 241Extend radially outwardly, another support arm 241 stretches out along flat-cut direction again after first extending obliquely upward.And first prolong obliquely upwardStretch along flat-cut direction to stretch out again and one piece of larger space can be conceded below the support arm 241, this space can be used for holdingReceive Paracentesis needle holder component.
Reference picture 4 and Fig. 5, a kind of process Installation groove B55 are axially extended to puncturing chute 54 from the open rearward end of syringe 5Lead to, puncture cursor slide 13 and inserted from this process Installation groove B55 and up into puncture chute 54 and thereby, connecting with hose connector 3The piercing assembly finished is connect axially to plant and intussusception with syringe 5.So, whole piercing assembly band is same has been connected thereto what is finishedHose connector 3 is able to the rear end insertion from syringe and planted with syringe be connected.The process Installation groove B55 width that cracks is be slightly narrower than wearingPierce the groove width of chute 54.A kind of elastic convex clip 56 is provided with puncturing the tail end of chute 54, the salient point on this elastic convex clip 56 can be withWith puncturing the corresponding pit on cursor slide 13（It is not drawn into figure）Buckle, the shifting of the Paracentesis needle holder 12 after further limitation is retreated in placeIt is dynamic.The elastic convex clip 56 is opened on top upwards can allow puncture cursor slide 13 to enter from process Installation groove B55 in puncture chute 54.
Reference picture 11, Figure 12, be provided with that a kind of anti-Hemostatic Oral Liquid inversely overflows on the blood channel of blood sampling needle stand is anti-reverseFlow valve 7.The valve for preventing reverse-flow 7 is a kind of diaphragm type one-way valve.Diaphragm type one-way valve is made up of film 71 and fixed ear 72, film 71External diameter is more than the blood channel in blood sampling needle stand 22 and its leading flank contacts laminating with the step surface in blood channel, fixedEar 72 pushes down film side face with blood sampling needle stand Construction integration, fixation tongue thereon, and the corresponding another side of film is in negative pressureSwing backward forms a mitre with step surface and concedes blood channel, and diaphragm recovers by natural resiliency when pressure balance or malleationOriginal shape touches closing liquid passage with step surface patch.
A kind of check construction 6 is installed, this check construction 6 is symmetrically arranged by two panels in reference picture 10, Paracentesis needle holder 12Tongue piece 61 and retainer ring 62 are constituted, and the ring wall of the retainer ring 62 is a kind of dividing wall, tongue piece root and the integral structure of the ring wallMake, the cavity beyond tongue piece is isolated by the ring wall to be closed, check construction is fixed on by the front of Paracentesis needle holder 12 by retainer ring 62The inner chamber of syringe 5 leading section, two symmetrical tongue pieces 61 can be prevented with after the sliding of Paracentesis needle holder 12 after closing in a kind of pointed shapeMove back and the inversely effusion of the puncture needle tubing 11 in the inner chamber of retraction syringe 5.
When the hemostix is assembled, by the puncture needle tube assembly insertion syringe operation set inner chamber of the flexible pipe of connection well affixed in advance,Cursor slide plug is punctured in puncture needle tube assembly and crosses process Installation groove B, and pushes the elastic convex clip of puncture runner rear end open, allows puncture cursor slide to enterEnter and puncture chute, and puncture needle tubing simultaneously and penetrate the preceding lower end pin hole of syringe, puncture needle tube assembly continues to slide into forward foremost；Two support arms of blood-collecting needle tube component are corresponded to respectively again and filled in process Installation groove A, then by syringe front end face opening atBig hole moves out of the connection flexible pipe other end, affixed with blood-collecting needle tube component.From the point of view of process is entirely assembled, the Novel hemostix groupDress is easy to be a lot, and efficiency is greatly improved.
During Clinical practice, first by vacuum test tube insert heparin tube auxiliary pushing hands annulus to protective jacket rear end face thereon withAnnulus end face offsets, and treats that hemostix is punctured into blood vessel, is seen from transparent hose after blood back, and a hand gently buttresses syringe, separatelyHeparin tube is inserted into heparin tube front end face by one hand from back end of syringe to be encountered in operation set after reinforcement rear end face, and mobile mother refers toWith forefinger to pushing hands and the auxiliary pushing hands fin of taking a blood sample, thumb and forefinger pinch blood sampling pushing hands and fin, some power are used less respectively, willThe two draws close in opposite directions, untill it can not draw close again.Because heparin tube front end face props up rib, and tube protecting sleeve rear end of taking a blood sample hasWithstood by auxiliary pushing hands, heparin tube can not retreat, and blood-collecting needle tube component can be freely in pin by the slip of travelling arm thereonMoved in tube inner chamber, thus, during as above-mentioned move toward one another, it can only move backward, so, blood-collecting needle tube is with regard to that can penetrate antidrip glueSet and sealing blood sampling tube plug, needle point, which is penetrated in heparin tube, starts blood sampling, and blood sampling ends, and takes the blood vessel at Esmarch's bandage, punctureInternal pressure is reduced rapidly, and now hemostix does not exit blood vessel also, and heparin tube internal pressure>Intravascular pressure, due to the intervention of valve for preventing reverse-flowSo that the blood taken will not return intravascular and occur risk of infection.
The not described part of the present embodiment is same as the prior art.