Patient-Controlled Epidural Analgesia (PCEI)is Achieved by Administering Drugs Directly into The

Patient-controlled epidural analgesia (PCEI) is achieved by administering drugs directly into the:

A) superior vena cava.
B) right atrium of the heart.
C) third ventricle of the brain.
D) subarachnoid space.
E) none of the above