In January 2004, our department started using a series of quantitative automatic vein blood blood, and blood collection time, and blood was observed. It is reported as follows: a data and blood collection methods 90 cases requiring venous blood in-patients were randomly divided into two groups, each group of 45 cases. 1.1.1 The optional 1.1-quantitative automatic vein blood collection method quantitative automatic vein blood of ordinary pipe 9, stickers, ready to label disposable lancets on the 7th one, into the injection plate, brought to the patient's bedside. 1.1.2 explain to the patient, to obtain co-operation, check the bed number, name, and then select a suitable vein, fasten a tourniquet above the puncture site is about 6cm, disinfection, instruct patient to make a fist to make the vein filling. Automatic venous blood collection needle into the blood vessels, see back to the other end of the blood after the needle sleeve (rubber tube) into the test tube. Negative pressure inside the test tube so that blood flow automatically into the in vitro, the nine test tubes were taken required ml (2ml7 a 3ml2 a total of blood 20ml) with a dry cotton swab to press the puncture point, and quickly pull out the needle, press the puncture point a moment to clean up things. 1.1.3 quantitative automatic vein blood the time required to see the return of blood from the needle to pull out the needle so far. Statistical sampling time and averaged. 1.2 syringe venous blood method 1.2.1 optional plastic test tube 9 and paste the label 20ml syringe to pay a needle one on the 7th, into the injection plate, brought to the patient's bedside. 1.2.2 ready to work with quantitative automatic vein blood collection bag, 20ml syringe, put the needle on the 7th, the needle press with a dry cotton swab blood 20ml puncture