American Society of Anesthesiologists Task Force on Perioperative Blood Management. Practice Guidelines for Perioperative Blood Management: An Updated Report by the American Society of Anesthesiologists Task Force on Perioperative Blood Management. Anesthesiology. 2015;122:241-75.
Guideline Recommendation:
If coagulopathy is suspected, obtain standard coagulation tests (e.g., INR, aPTT, fibrinogen concentration) or viscoelastic assays, if available, as well as platelet count.