A patient's abdominal ultrasound reveals several stones in the common bile duct and gallbladder.

A patient's abdominal ultrasound reveals several stones in the common bile duct and gallbladder. He is admitted to the medical-surgical unit and placed on nothing by mouth (NPO) status and scheduled to undergo endoscopic retrograde cholangiopancreatography (ERCP).

1.     What is the rational for the treatment of acute cholecystitits with the following interventions.

A.    NPO with possible NG suction

B.    Antibiotics (which route)

C.    Antispasmodics

2.     what is ERCP and indication for it based on this patient's status.

3.     Which results are abnormal, and what do they reflect?