In general, diet does not affect the results of coagulation tests, so fasting is not required to check coagulation function.
Indicators of coagulation function usually include four basic indicators: Prothrombin Time (PT), Activated Partial Thromboplastin Time (APTT), Fibrinogen and Thrombin (TT) time, which are usually unaffected by food and water, but may be affected by medications and other factors, so it is not mandatory to fast for the test, but you should not take any relevant medications before the test.
In the case of inpatient examination, the nurse may take samples of all examinations at a fixed time in one go, which will include other fasting examination items. In this case, the doctor’s advice should be strictly followed to maintain a fasting state before blood tests are drawn, so as not to affect the results of other examinations.
In conclusion, before clinical examination, you can consult the relevant healthcare personnel in advance and follow the relevant precautions strictly.