To assist with hemostasis after a venipuncture, what should the medical assistant instruct the patient to do?

To assist with hemostasis after a venipuncture, instructing the patient to hold pressure on the site and elevate their arm is the most effective approach. Applying pressure helps to reduce blood flow to the area and encourages the formation of a clot, thereby decreasing the likelihood of continued bleeding. Elevating the arm aids in reducing venous pressure which can also contribute to hemostasis.

The other options do not effectively support the goal of controlling bleeding. Removing a bandage and applying ice may help alleviate swelling or discomfort but does not address the immediate need for clot formation. Moving the arm in a circular motion can disrupt the clotting process, increasing the risk of bleeding. Lastly, applying heat could potentially dilate the blood vessels, which might exacerbate bleeding rather than control it. Therefore, the guidance to hold pressure and elevate the arm is the most appropriate and effective for achieving hemostasis after venipuncture.