Dry procoagulant tubes are used for collection of blood specimens for liver function, usually 3-5 ml are needed. Used for medical testing in biochemistry, immunology, serology, various viral testing and blood bank investigation of blood specimen collection and packaging, the tube wall has been specially treated to prevent wall hanging and hemolysis phenomenon, in addition to the detection of liver function, but also to detect renal function, tumor markers, ions, enzymes and so on. Specimen collection time is generally 8~10 hours after fasting specimens collected, easy to find and observe the pathological conditions, and repeatability is better, as far as possible before 9:00 a.m. fasting, fasting too long will also affect the test results. At the end of the collection of specimens, no need to shake well, placed upright can be, to avoid extrusion or vibration is too large, labeled to check the integrity of the timely delivery of the test. It is recommended that patients, if necessary, please go to a regular hospital test, do not be negligent, so as not to delay the disease.