You do not need to fast to get a coagulation quadruple test. The coagulation quadruple test is a test to see if the blood clotting function is good or not, and it is done by drawing blood from a vein. Fasting is not required if only the coagulation quadruple test is performed without checking blood lipids, liver function, kidney function, fasting blood sugar, etc. The test is performed by drawing blood from a vein. Items that require fasting are items where eating and drinking have a greater impact on the results, and if these items are checked after a meal, the results will not be reliable. Except for emergencies or other special reasons, blood tests are usually drawn after 12 hours of fasting. There are some laboratory tests, such as routine blood tests, blood coagulation four, hepatitis B five or six, hepatitis C antibody, glycated hemoglobin, etc., these tests can be checked on an empty stomach or not, and there is not much difference between the results of the test on an empty stomach and the result of the test after a meal. It is better to do several tests at the same time, or to do them on an empty stomach.