CN2065878U - Glass subatmospheric pressure test tube - Google Patents

Abstract

The utility model belongs to the technical field of medical test apparatus, in particular to a disposable glass negative pressure test tube used for venous blood sample taking. The utility model can enhance the quality of the blood samples, prevent the test errors caused by the hemolysis and the alteration of the blood components, and reduce the disinfection pieces and the polluting opportunities. The utility model is characterized in that the needle and the guide needle are firmly connected through a plastic conduit; the glass test tube is pumped previously to form a vacuum state to attain a certain negative pressure (the negative pressure index is decided according to the quantity of the blood taking); one end of the guide needle is inserted into the rubber test tube plug; the glass test tube is plugged by the rubber test tube plug; the large amount of negative pressure loss in a certain time is avoided.

Description

Glass subatmospheric pressure test tube

This utility model belongs to medical test equipment technical field, specifically is used for the disposable glass negative pressure test tube of taking the venous blood specimen.

Check in the past is to extract with glass syringe with blood preparation, nearly 2 years because of virus such as hepatitis by the glass syringe that uses repeatedly by way of cross infection, replace and use disposable plastic injector instead, but also exist: 1, cost is too high, price is 0.7～0.8 yuan one pair, only can use in the part large hospital.2, there are the spin friction of syringe needle and nipple junction surface generation blood equally in plastic syringe blood drawing process and glass syringe, the friction of nook closing member and air, friction that injecting tube is interior etc. and cause haemolysis and emergent gas composition to cause the error of assay.3, when taking original blood drawing method, the essential equipment such as needle tubing, test tube, pipe close that use have increased the sterilization number of packages, have increased opportunities for contamination.

The purpose of this utility model is: improve the blood preparation quality, avoid haemolysis and blood component to change the testing error that is caused, reduce the sterilization number of packages, reduce opportunities for contamination, handled easily is simplified the blood sampling program.

This utility model technical solution: a kind of glass negative pressure test tube of forming by syringe needle, needle tubing, it is characterized in that syringe needle firmly is connected by plastic catheter with guide pin, teat glass is evacuation in advance, make and reach certain negative pressure (negative pressure exponent is decided by what are drawn blood) in it, guide pin one end inserts rubber test tube plug, the rubber pipe close clogs teat glass, guarantees the unlikely within a certain period of time a large amount of forfeitures of negative pressure, during packing guide pin is gently placed in the rubber test tube plug blind hole.

This utility model advantage:the anticoagulant that before evacuation, can put into various uses in advance, after making venous blood directly enter test tube, promptly mix with anticoagulant, blood is by flowing directly into test tube in the vein when using this negative pressure test tube blood drawing, the variation and the outside contamination of blood component have been prevented, after the blood sampling, subsidiary kilowatt of plug of dialling and removing guide pin promptly is the teat glass of a, can directly deliver to the sterilizing room operation of testing, the design's main part is teat glass and pipe close, accomplish that under disposable prerequisite product are dual-purpose, improved stock utilization, reduced cost (only for plastics disposable syringe about 40%) because blood collection procedure is directly to be finished to test tube by blood vessel at air-proof condition next time, having avoided resembling in the past with the needle tubing adverse consequences that the operational approach of test tube brings of reinjecting of drawing blood.

Fig. 1 is this utility model structural representation.

1 is the rustless steel syringe needle among the figure, and 2 is plastic catheter, and 3 is guide pin, and 4 is rubber test tube plug, and 5 is teat glass, and 6 is catch.

Below in conjunction with accompanying drawing this utility model is further described:

Select suitable teat glass for use, after sterilization, put into anticoagulant, make blood after vein blood vessel flows out, directly mix, guarantee the blood preparation quality with it.By syringe needle 1,plastic catheter 2, the puncture part thatguide pin 3 is formed has puncture convenient, and blood back is advantage clearly, when blood sampling, when syringe needle thrusts vein, can see blood back atplastic catheter 2 front ends, at this moment will vertically be consolidated in the catch 6 on theguide pin 3, be pressed into alongteat glass 5 directions, promptly finished blood sampling work.Make rubbertest tube plug 4 with nontoxic rubber, in the middle of holding, the rubber test tube has blind hole beyond the Great Wall, guide pin can be inserted, rubber test tube plug bottom has breach, the discarded puncture in blood sampling back part, stay the blood preparation of using in rubber test tube plug sealed glass test tube and the pipe, can send into sterilizing room and test.

This product is in when design, and mainly consider " disposable " in the use and reduce sample and the contacting of the external world as far as possible, so this product can make blood flow directly into test tube by vein blood vessel, and the dual-purpose cost that reduced of the product of accomplishing, improved the market competitiveness.

Claims (3)

1, the glass negative pressure test tube a kind of by syringe needle, that needle tubing is formed is characterized in that syringe needle firmly is connected by plastic catheter with guide pin, and guide pin one end inserts rubber test tube plug, and rubber test tube plug clogs teat glass.

2, glass negative pressure test tube according to claim 1 is characterized in that the rubber test tube has blind hole in the middle of holding beyond the Great Wall, and the bottom has breach.

3, glass negative pressure test tube according to claim 1 is characterized in that catch vertically is consolidated on the guide pin.

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