CN102160793A - Dripping-proof backflow-blood-observable venous blood taking needle - Google Patents
Dripping-proof backflow-blood-observable venous blood taking needle Download PDFInfo
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- CN102160793A CN102160793A CN 201110054562 CN201110054562A CN102160793A CN 102160793 A CN102160793 A CN 102160793A CN 201110054562 CN201110054562 CN 201110054562 CN 201110054562 A CN201110054562 A CN 201110054562A CN 102160793 A CN102160793 A CN 102160793A
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Abstract
The invention relates to a dripping-proof backflow-blood-observable venous blood taking needle, which can improve the accuracy of blood taking amount, prevent dripping after blood taking, conveniently observe backflow blood and effectively prevent cross contamination caused by blood dripping, and ensure accurate blood taking amount. The blood taking needle consists of far-end component and a near-end component which are fixedly connected, wherein the far-end component comprises a far-end needle seat with a far-end needle seat cavity and a far-end needle tube fixed on the far-end needle seat, and the upper end of the far-end needle tube is communicated with the far-end needle seat cavity; the near-end component comprises a near-end needle seat with a near-end needle seat cavity and a near-end needle tube fixed on the near-end needle seat; a wet-closing member is arranged between the far-end needle seat cavity and the near-end needle seat cavity and separate the far-end needle seat cavity from the near-end needle seat cavity, and the lower end of the near-end needle tube passes through the wet-closing member and extends into the far-end needle seat cavity; and the far-end needle seat and the near-end needle seat are made of transparent or semitransparent material.
Description
Technical field
The present invention relates to a kind of vein blood taking needle with visible blood-flow function, particularly a kind of improve the blood sampling volume accuracy, have the blood of preventing water clock function visible blood-flow vein blood taking needle after having adopted blood.
Background technology
Vein blood taking needle is general to be used to gather human vein blood with vacuum test tube and the supporting use of needle holder with negative pressure.U.S. Pat P5303713 provides a kind of structure of vein blood taking needle; this vein blood taking needle is made up of needle tubing, needle stand and protective sleeve; the rustless steel needle tubing that two ends all have needle point passes far-end and the near-end that forms needle tubing behind the needle stand respectively; far-end is used to the vein that punctures; near-end be used to the to puncture plug of vacuum test tube; under the effect of vacuum test tube negative pressure, venous blood enters in the vacuum test tube by the inner chamber of needle tubing, finishes the collection of specimen.The shortcoming of this blood taking needle is, during the puncture vein, can not observe blood back, thus can not judge whether puncture successfully, inconvenient clinical manipulation, all the more so for the patient that vein is difficult to puncture, frequent repeated localised puncture causes time waste and patient's misery increase.
U.S. Pat P 6533760 and Chinese patent CN1633945 have disclosed a kind of vein blood taking needle of visible blood-flow.This vein blood taking needle is made up of far-end needle tubing, far-end needle stand, near-end needle tubing, near-end needle stand and protective sleeve.Far-end needle stand and near-end needle stand assembling back form the blood back chamber of enough volumes, and the blood back chamber is communicated with far-end needle tubing and near-end needle tubing, when the puncture vein, can observe blood back by this blood back chamber.But this blood taking needle is after having adopted blood, because patient's vein compressed the indoor air of blood taking needle blood back, causes when intravenous is extracted blood taking needle, and air resilience by compression makes blood residual in the needle tubing flow out the generation weeping from needle point.Effusive blood very easily causes the cross infection in the hospital.In addition, because the cavity of blood back chamber has consumed the partial vacuum degree in the vacuum test tube, the blood sampling volume of first vacuum test tube can be obviously not enough, and the blood sampling volume deficiency may influence the accuracy of part testing result.
Summary of the invention
Technical problem to be solved by this invention provides a kind of visible blood-flow vein blood taking needle blood sampling volume accuracy, that prevent to have adopted water clock behind the blood that improves, can observe blood back easily during blood sampling, and can effectively prevent the cross-contamination that the blood water clock causes, and blood sampling volume is accurate.
The technical scheme of being taked that the present invention solves the problems of the technologies described above is that antidrip visible blood-flow vein blood taking needle of the present invention is characterized in that: it is made of fixedly connected distal component and near-end assembly; Described distal component comprises far-end needle stand with far-end needle stand inner chamber and the far-end needle tubing that is fixed thereon, and the upper end of far-end needle tubing communicates with far-end needle stand inner chamber; Described near-end assembly comprises near-end needle stand with near-end needle stand inner chamber and the near-end needle tubing that is fixed thereon; Be set with between described far-end needle stand inner chamber and the near-end needle stand inner chamber the wet closure member of both separated chances, the lower end of near-end needle tubing is passed the wet closure member of chance and is extended into far-end needle stand inner chamber; Described far-end needle stand and near-end needle stand are made by transparent or semitransparent material.
The wet closure member of described chance is ventilated membrane or plunger.
Owing to be provided with the wet closure member of both separated chances at near-end needle stand inner chamber and far-end needle stand inner chamber, this meets wet closure member can only can not pass through liquid such as water, blood by air, and when running into water or blood, can seal automatically, no longer see through empty G﹠W.When puncturing successfully, the air admission of venous pressure compression far-end needle stand lumen side makes blood flow in the inner chamber of far-end needle stand by the inner chamber of far-end needle tubing, thereby observes blood back to the near-end inner chamber.Flow in the near-end inner chamber blood with meet after wet closure member contact, meet wet closure member sealing, just can not see through air and blood again.When first vacuum test tube gathered venous samples can, the air in the near-end needle stand inner chamber can not flow to vacuum test tube by meeting wet closure member, thereby avoid consuming the deficiency of the blood sample that vacuum causes in the vacuum test tube.When having adopted blood and pulled out pin, although the pressure and the venous pressure of air are suitable in the near-end needle stand inner chamber, but meet wet rear enclosed owing to meet wet closure member, the air of near-end needle stand inner chamber can be compressed to a side of far-end needle stand, thereby can not produce the blood weeping, effectively prevent the cross-contamination that the blood water clock causes from distal needle bobbin nose part.
The volume of described near-end needle stand inner chamber is volumetrical 20～30 times of a distal needle tube cavity.During blood sampling, near-end needle stand inner chamber provides enough spaces to compress the air of this intracavity for venous pressure, thereby venous blood is flow in the far-end needle stand inner chamber, the operator can visit to examine by transparent or semitransparent near-end needle stand and far-end needle stand and observe blood back easily, punctures successfully judging whether.
The upper port of described far-end needle tubing is positioned at the bottom that distal needle is done inner chamber, and the lower port of described near-end needle tubing is passed and met wet closure member and be inserted in the inner chamber of far-end needle stand, with the distance of the upper port of near-end needle tubing greater than 0.1mm, more preferably greater than 0.5mm.Distance too closely may not observe visible blood-flow.
The invention has the beneficial effects as follows that in the blood collection procedure, the operator can visit to examine by transparent or semitransparent near-end needle stand and far-end needle stand and observe blood back easily, to judge whether to puncture successfully; The wet closure member of chance has been blocked the air flow blood taking tube in the near-end needle stand inner chamber, thereby has improved the accuracy of first blood taking tube blood sampling volume; After sample of blood, drawn is finished, when the far-end needle tubing pulls away vein, meet wet rear enclosed owing to meet wet closure member, the air of near-end needle stand inner chamber can be compressed to a side of far-end needle stand, thereby can not produce the blood weeping, effectively prevent the cross-contamination that the blood water clock causes from distal needle bobbin nose part.
Description of drawings
This description comprises following 13 width of cloth accompanying drawings:
Fig. 1 is the assembling longitudinal sectional drawing of antidrip visible blood-flow vein blood taking needle of the present invention, wherein near-end components section;
Fig. 2 is distal component and the assembling of near-end assembly longitudinal sectional drawing, wherein a near-end components section in the antidrip visible blood-flow vein blood taking needle of the present invention;
Fig. 3 is the assembly drawing longitudinal sectional drawing of distal component in the antidrip visible blood-flow vein blood taking needle of the present invention;
Fig. 4 is the structural representation of far-end needle stand in the antidrip visible blood-flow vein blood taking needle of the present invention;
Fig. 5 is the structural representation of meeting wet closure member in the antidrip visible blood-flow vein blood taking needle of the present invention;
Fig. 6 is the assembling longitudinal sectional drawing of near-end assembly in the antidrip visible blood-flow vein blood taking needle of the present invention;
Fig. 7 is the structural representation of near-end needle stand in the antidrip visible blood-flow vein blood taking needle of the present invention.
Fig. 8 is near-end assembly and a distal component assembling longitudinal profile figure structure schematic representation in the antidrip visible blood-flow vein blood taking needle of the present invention;
Fig. 9, Figure 10 and Figure 11 are the blood collection procedure sketch maps of antidrip visible blood-flow vein blood taking needle embodiment 1 of the present invention;
Figure 12 is the blood collection procedure sketch map of antidrip visible blood-flow vein blood taking needle embodiment 2 of the present invention;
Parts, toponym and pairing labelling among the figure: distal component 200, far-end needle tubing 210, far-end needle stand 220, far-end needle stand hole 221, far-end needle stand inner chamber 223, bottom 224, the wet closure member 230 of chance, centre bore 231, near-end assembly 300, rubber sleeve 310, near-end needle tubing 320, near-end needle stand 330, near-end needle stand inner chamber 331, far-end sheath 400, near-end sheath 500, vacuum test tube 20, vacuum test tube plug 21, needle holder 30, blood 40.
The specific embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
See figures.1.and.2, antidrip visible blood-flow vein blood taking needle of the present invention, it is made of fixedly connected distal component 200 and near-end assembly 300.Described distal component 200 comprises far-end needle stand 220 with far-end needle stand inner chamber 223 and the far-end needle tubing 210 that is fixed thereon, and the upper end of far-end needle tubing 210 communicates with far-end needle stand inner chamber 223.Described near-end assembly 300 comprises near-end needle stand 330 with near-end needle stand inner chamber 331 and the near-end needle tubing 320 that is fixed thereon; Be set with between described far-end needle stand inner chamber 223 and the near-end needle stand inner chamber 331 the wet closure member 230 of both separated chances, the lower end of near-end needle tubing 320 is passed the wet closure member 230 of chance and is extended into far-end needle stand inner chamber 223.Described far-end needle stand 220 and near-end needle stand 330 are made by transparent or semitransparent material, and these materials can be transparent polymer materials such as polypropylene, Merlon, polystyrene, transparent polyester, K resin, polymethyl methacrylate and cellulose.
With reference to Fig. 2, Fig. 3 and Fig. 4, described distal component 200 is by far-end needle tubing 210, far-end needle stand 220 and meet wet closure member 230.Sharp needle point is worn into to be used to the human vein that punctures in far-end needle tubing lower end, and the upper end then is inserted into far-end needle stand 220, and bonds firmly by adhesive, and the upper end of far-end needle tubing 210 communicates with far-end needle stand inner chamber 223.Meet wet closure member 230 and be a kind of can only see through air and can not permeate water, the member of liquid such as blood, and when running into water or blood, can seal automatically, can not see through empty G﹠W again.The wet closure member 230 of described chance is ventilated membrane or plunger, can be made by polypropylene, polyethylene, politef, Kynoar, cellulose or other materials of meeting wet meeting sealing.The wet closure member 230 of chance is fixed on the last end face of far-end needle stand 220 by the mode of bonding, ultrasonic bonding, sweat soldering or other physics.The wet closure member 230 of described chance is provided with centre bore 231, and described near-end needle tubing 320 passes the slightly larger in diameter at wet closure member 230 positions of chance in the diameter of this centre bore 231, so that cooperate closely, prevents to reveal.
With reference to Fig. 1, Fig. 6 and Fig. 7, described near-end assembly 300 is made up of rubber sleeve 310, near-end needle tubing 320 and near-end needle stand 330.Sharp needle point be used to the to puncture plug of vacuum test tube is worn in the upper end of near-end needle tubing 320, and near-end needle stand 330 is inserted in the lower end of near-end needle tubing 320, and firm by adhesive bonds.Near-end needle stand 330 is made for transparent or semitransparent plastic material, and near-end needle stand 330 has an enough big near-end needle stand inner chamber 331, and its volume is 20～30 times of far-end needle stand inner chamber 223 volumes.Cover rubber sleeve 310 on the described near-end needle stand 330, the position of described near-end needle tubing 320 beyond near-end needle stand 330 bodies is sealed in the inner chamber of rubber sleeve 310, and rubber sleeve 310 is made of synthetic rubber or natural rubber.When vein blood taking needle is used to take a blood sample, rubber sleeve 310 pressurizeds and being out of shape, and penetrated the top by near-end needle tubing 320 near-end needle tubing needle points 321, the needle point of near-end needle tubing 320 passes the plug of vacuum test tube then, forms a path and take a blood sample between the inner chamber of vein bloody path and vacuum test tube, after blood sampling is finished, extract vacuum test tube, rubber sleeve 310 automatic resiliences, the interior intracavity that the tip portion of near-end needle tubing 320 is wrapped in rubber sleeve 310 is finished sealing, thereby stops blood to flow out.
With reference to Fig. 2 and Fig. 8, the near-end assembly 300 among the present invention is fixedlyed connected by the mode of bonding, interference fit, screw thread or other physical connections that can effectively seal with distal component 200.Carry out when fixedly connected, the bottom of near-end needle tubing 320 is passed the centre bore 231 of meeting wet closure member 230 and is inserted in the far-end needle stand inner chamber 223.Far-end needle stand inner chamber 223 communicates with near-end needle tubing 320 and far-end needle tubing 210, the passage when forming blood sampling.Near-end needle stand inner chamber 331 and far-end needle stand inner chamber 223 are separated by the wet closure member 230 of chance, and the air in the far-end needle stand inner chamber 223 can enter into the near-end needle stand by meeting wet closure member 230, and water or blood can not be by meeting the closure member 230 that wets.Meet and seal automatically after wet closure member 230 runs into blood, can not be after the sealing again by air and blood.For being sealed and matched, leak between the centre bore 231 of near-end needle tubing 320 and the wet closure member 230 of chance in case produce.
Described far-end needle stand inner chamber 223 is less, and guarantee to observe blood back and get final product, can be various suitable shapes, the blood sample waste when this design can reduce sample of blood, drawn and the loss of collection capacity.The upper port of described far-end needle tubing 210 is located on or near the bottom of far-end needle stand inner chamber, and the spacing L between the bottom of the upper port of the lower port of described near-end needle tubing 320 and far-end needle tubing 210 or far-end needle stand inner chamber 223 should be greater than 0.1, more preferably greater than 0.5.Near-end needle stand inner chamber 331 has enough big volume, helps guaranteeing that the vein pressure energy makes venous blood can flow out distal needle pipe 210 to far-end needle stand inner chamber 223 by the air in the compression chamber, punctures successfully with affirmation thereby observe blood back.After blood taking needle assembling of the present invention was finished, the receiving volume sum of far-end needle stand inner chamber 223 and near-end needle stand inner chamber 331 should be 20～30 times of far-end needle tubing 210 cavity volume, and too little may causing of receiving volume can not be observed blood back; Receiving volume is too big to be inconvenient to make or to operate inconvenience.In use, far-end needle stand inner chamber 223 is positioned at the bottom, and venous blood only flow in the far-end needle stand inner chamber 223, and the air of near-end needle stand inner chamber 331 can not enter into vacuum test tube because of the obstruct of meeting wet closure member 230.So both avoided the waste of blood sample, prevented again that air admission in the far-end needle stand inner chamber 223 from vacuum test tube, having guaranteed the accuracy of blood sampling volume
With reference to Fig. 1, be arranged with far-end sheath 400 by interference fit on the described far-end needle stand 220, the position of described far-end needle tubing 210 beyond far-end needle stand 220 bodies is sealed in the inner chamber of far-end sheath 400.Be arranged with near-end sheath 500 by interference fit on the described far-end sheath 400, described rubber sleeve 310 is sealed in the inner chamber of near-end sheath 500.
Vein blood taking needle of the present invention in use, after the 210 puncture vein successes of far-end needle tubing, air in inner chamber, far-end needle stand inner chamber 223, near-end needle tubing 320 and the near-end needle stand inner chamber 331 of human vein compression far-end needle tubing 210, thus venous blood is flow in the far-end needle stand inner chamber 223.
Vein blood taking needle of the present invention is when puncturing successfully back blood sampling, the needle point of the near-end needle tubing 320 of vein blood taking needle passes the top of rubber sleeve 310 and stings the plug that passes vacuum test tube then, under the suction function in vein pressure and vacuum test tube, venous blood is by the inner chamber of far-end needle tubing 210, the inner chamber of far-end needle stand inner chamber 223 and near-end needle tubing 320 enters into and finishes blood sampling in the vacuum test tube, finishing the blood sampling extract vacuum test tube after, rubber sleeve 310 automatic resiliences are wrapped in the needle point of near-end needle tubing 320 in the rubber sleeve 310 and finish sealing, thereby stop blood to flow out.
Vein blood taking needle of the present invention is after puncturing successfully, and venous blood flow in the far-end needle stand inner chamber 223, and contacts with meeting wet closure member 230, meets and seals automatically after wet closure member 230 runs into blood, can not pass through air or blood again.When the needle point with near-end pin 320 passed first vacuum test tube plug 21 and is communicated with the inner chamber of vacuum test tube 20, the air in the near-end needle stand inner chamber 331 can not be sucked in the vacuum test tube 20.Thereby, when normal blood sampling, can not impact the sample collection amount.
Embodiment 1:
Concrete structure figure according to the vein blood taking needle of the present invention design sees Fig. 1-Fig. 6.Cooperate the analog acquisition blood of human body with vacuum test tube and needle holder, human vein presses (when using arm-rest belt) simulation to be set to 4KPa, and the sketch map of its blood collection procedure is seen Fig. 9, Figure 10 and Figure 11.Simulation result is to observe blood back, and the influence of the sample collection amount of blood is less, does not have the water clock of blood to take place simultaneously when having adopted blood.
Embodiment 2:
Concrete structure figure according to the vein blood taking needle of the present invention design sees Fig. 8.Cooperate the analog acquisition blood of human body with vacuum test tube and needle holder.Human vein presses (when using arm-rest belt) simulation to be set to 4KPa, and the sketch map of its blood collection procedure is seen Figure 12.Simulation result is to observe blood back, and the influence of the sample collection amount of blood is less, can prevent the water clock of blood simultaneously when having adopted blood.
Some principles of the above antidrip visible blood-flow vein blood taking needle of the present invention that just explains through diagrams, be not be the present invention to be confined to shown in and in described concrete structure and the scope of application, so every the corresponding modify and equivalent that might be utilized, the claim that all belongs to the present invention and applied for.
Claims (10)
1. antidrip visible blood-flow vein blood taking needle is characterized in that: it is made of fixedly connected distal component (200) and near-end assembly (300); Described distal component (200) comprises far-end needle stand (220) with far-end needle stand inner chamber (223) and the far-end needle tubing (210) that is fixed thereon, and the upper end of far-end needle tubing (210) communicates with far-end needle stand inner chamber (223); Described near-end assembly (300) comprises near-end needle stand (330) with near-end needle stand inner chamber (331) and the near-end needle tubing (320) that is fixed thereon; Be set with between described far-end needle stand inner chamber (223) and the near-end needle stand inner chamber (331) the wet closure member (230) of both separated chances, the lower end of near-end needle tubing (320) is passed the wet closure member (230) of chance and is extended into far-end needle stand inner chamber (223); Described far-end needle stand (220) and near-end needle stand (330) are made by transparent or semitransparent material.
2. antidrip visible blood-flow vein blood taking needle as claimed in claim 1 is characterized in that: the described chance closure member (230) that wets is ventilated membrane or plunger.
3. antidrip visible blood-flow vein blood taking needle as claimed in claim 1 is characterized in that: the volume of described near-end needle stand inner chamber (331) is 10～30 times of far-end needle tubing (210) cavity volume.
4. antidrip visible blood-flow vein blood taking needle as claimed in claim 3, it is characterized in that: the upper port of described far-end needle tubing (210) is located on or near the bottom of far-end needle stand inner chamber (223), spacing L between the bottom of the upper port of the lower port of described near-end needle tubing (320) and far-end needle tubing (210) or far-end needle stand inner chamber (223) should be greater than 0.1mm, more preferably greater than 0.5mm.
5. antidrip visible blood-flow vein blood taking needle as claimed in claim 4 is characterized in that: the spacing L between the upper port of the lower port of described near-end needle tubing (320) and far-end needle tubing (210) or the bottom of far-end needle stand inner chamber (223) is greater than 0.5mm.
6. antidrip visible blood-flow vein blood taking needle as claimed in claim 1 or 2 is characterized in that: described far-end needle stand (220) is fixedlyed connected by bonding, interference fit or thread connecting mode with near-end needle stand (330); The described chance closure member (230) that wets is adhesively fixed on the last end face of far-end needle stand (220).
7. antidrip visible blood-flow vein blood taking needle as claimed in claim 6, it is characterized in that: the described chance closure member (230) that wets is provided with centre bore (231), described near-end needle tubing (320) pass meet wet closure member (230) position slightly larger in diameter in the diameter of this centre bore (231).
8. antidrip visible blood-flow vein blood taking needle as claimed in claim 1, it is characterized in that: described near-end needle stand (330) is gone up and is arranged with rubber sleeve (310) by interference fit, and the position of described near-end needle tubing (320) beyond near-end needle stand (330) body is sealed in the inner chamber of rubber sleeve (310).
9. antidrip visible blood-flow vein blood taking needle as claimed in claim 1, it is characterized in that: described far-end needle stand (220) is gone up and is arranged with far-end sheath (400) by interference fit, and the position of described far-end needle tubing (210) beyond far-end needle stand (220) body is sealed in the inner chamber of far-end sheath (400).
10. antidrip visible blood-flow vein blood taking needle as claimed in claim 9 is characterized in that: described far-end sheath (400) is gone up and is arranged with near-end sheath (500) by interference fit, and described rubber sleeve (310) is sealed in the inner chamber of near-end sheath (500).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110054562 CN102160793B (en) | 2011-03-08 | 2011-03-08 | Dripping-proof backflow-blood-observable venous blood taking needle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110054562 CN102160793B (en) | 2011-03-08 | 2011-03-08 | Dripping-proof backflow-blood-observable venous blood taking needle |
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| CN102160793A true CN102160793A (en) | 2011-08-24 |
| CN102160793B CN102160793B (en) | 2012-12-26 |
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| CN 201110054562 Active CN102160793B (en) | 2011-03-08 | 2011-03-08 | Dripping-proof backflow-blood-observable venous blood taking needle |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102525488A (en) * | 2011-12-01 | 2012-07-04 | 上海金塔医用器材有限公司 | Disposable sterile retraction safety blood sampling needle |
| CN103315752A (en) * | 2013-06-28 | 2013-09-25 | 广州阳普医疗科技股份有限公司 | Controllable formula stopcock pjncture needle of taking a blood sample |
| CN106691470A (en) * | 2017-01-09 | 2017-05-24 | 济南大学 | Endoscope vein blood taking needle set and using method thereof |
| CN108354618A (en) * | 2018-04-28 | 2018-08-03 | 威海赛威医疗科技有限公司 | A kind of visual blood taking needle |
| CN109223000A (en) * | 2018-11-14 | 2019-01-18 | 威海永欣医疗科技有限公司 | The antipollution visual elbow blood taking needle of one kind and production method |
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| CN1736332A (en) * | 2004-06-02 | 2006-02-22 | 贝克顿·迪金森公司 | Flashback blood collection needle |
| CN101926649A (en) * | 2010-09-03 | 2010-12-29 | 威海鸿宇医疗器械有限公司 | Visible blood-back blood taking needle |
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