What action should a medical assistant take to assist with hemostasis after a venipuncture?

To assist with hemostasis after a venipuncture, the appropriate action is to instruct the patient to hold pressure on the site and elevate their arm. This technique effectively helps to stop bleeding by applying direct pressure to the puncture site, which promotes clot formation. Elevation of the arm can further assist in reducing blood flow to the area, thereby minimizing the risk of continued bleeding.

Applying ice can be beneficial in some scenarios for pain relief or to reduce swelling, but it is not a standard practice for promoting hemostasis directly after a venipuncture. Bandaging the site immediately is typically done after ensuring that bleeding has stopped and pressure has been applied. Administering an anticoagulant would be inappropriate in this situation as it would further increase the likelihood of bleeding rather than promote hemostasis.