Which action is appropriate if a patient has a history of fainting during blood draws?

The most appropriate action for a patient with a history of fainting during blood draws is to lay the patient down in a supine position. This position helps to ensure that if the patient does faint, they are already in a safe posture that can minimize the risk of injury. Laying the patient down allows for improved blood flow to the brain, which may help to prevent fainting or help them recover more quickly if they do feel lightheaded during the procedure.

Positioning the patient in a supine position also provides a more relaxed and stable environment for the blood draw, which can reduce anxiety that may contribute to fainting. It is essential to take precautions to safeguard patients who have had fainting episodes in the past, and this action is a well-recognized practice in phlebotomy for managing such scenarios effectively.