Anticoagulation in Thrombocytopenia: Case Study

Here’s a composite case study. A 50-year-old male was treated for colon cancer and is in remission. Complications include congestive heart failure, esophageal varices, and recently diagnosed NVAF.  Subsequent to chemotherapy, his platelet count has remained stable at  20–30,000/uL (RI 150–450/uL) and he experiences easy bruising. What assay would you recommend to enhance the safety of anticoagulation or left atrial appendage closure implantation to prevent NVAF-related thrombosis?