A 64-year-old female presents with severe right upper quadra…

A 64-year-old female presents with severe right upper quadrant abdominal pain radiating to her right shoulder. She reports nausea and vomiting after eating a greasy meal. On assessment, she is febrile at 101.8°F, HR 112, BP 98/64, RR 22, and SpO₂ 94%. Positive Murphy’s sign. The patient denies alcohol use.Which of the following best explains the underlying pathophysiologic process and appropriate prehospital management?