question: 22-year-old women presents to the emergency depament with a chief complaint of severe left upper quadrant pain after being punched by her husband. Her blood pressure is 110/76, her pulse is 80 bpm, and her respiration rate is 24 breaths per minute. The best means to establish a diagnosis is which of the following ?
opa: Four-quadrant tap of the abdomen
opb: CT of the abdomen
opc: Peritoneal lavage
opd: Upper gastrointestinal series