Final answer:
The appropriate central venous access device for a patient with trauma from a motor-vehicle crash, in need of immediate fluid and blood replacement and prophylactic antibiotic therapy, would be a Central venous catheter (CVC).
Step-by-step explanation:
The appropriate central venous access device for a patient with trauma from a motor-vehicle crash, in need of immediate fluid and blood replacement and prophylactic antibiotic therapy, would be a Central venous catheter (CVC). A CVC is a catheter that is inserted into a large vein, usually in the neck, chest, or groin area, and is used to administer medication, fluids, and nutrients directly into the bloodstream. This type of venous access device is ideal for patients who require rapid and continuous infusion of fluids or blood products.