Nursing management of hematoma involves applying pressure 1 to 2 cm above the puncture site for arterial access and at the puncture site for venous access. The nurse will also mark the area to evaluate any change in size, administer iv fluids, monitor serial blood cell counts, maintain the patient on bed rest, interrupt anticoagulant and antiplatelet medications if necessary, and administer blood transfusion if indicated. For retroperitoneal bleeding the nurse administers iv fluids and blood products, monitors serial blood cell counts, maintains the patient on bed rest, and stops all anticoagulants. For pseudoaneurysm or arteriovenous fistula the nurse prepares the patient for ultrasound or CT scan of the groin.