Final answer:
For a patient with orthopnea, they should be positioned in a supine position with an elevated head on the exam table, aiding in easier breathing by reducing diaphragm pressure.
Step-by-step explanation:
If a patient has orthopnea, which is difficulty breathing when lying flat, the medical assistant should position them on the exam table in a position that allows for easier breathing. Therefore, the correct position would be to have the person in a supine position with the head of the exam table elevated to help ease their breathing, often referred to as the semi-Fowler's or Fowler's position. This position aids in respiration by reducing pressure on the diaphragm, as the body is in a more upright position. The use of precise anatomical terms such as supine ensures clear communication in medical settings. Other positions like prone (face down) or having the patient stand would not be suitable for someone experiencing orthopnea.