Seven days after hip replacement, a patient receiving LMWH has a 58% platelet fall and a new proximal DVT. There is no alternative cause and the 4Ts probability is high. Which action is most appropriate while immunoassay testing is arranged?AStop all heparin and start full-dose non-heparin anticoagulation while awaiting testsBContinue LMWH at prophylactic dose and add aspirin pending laboratory confirmationCChange LMWH to unfractionated heparin and monitor the platelet count twice dailyDStop anticoagulation and transfuse platelets until the count returns to baselineEStart warfarin immediately as monotherapy and target an INR of 2.0–3.0Check my answer