A 32-year-old woman arrives at the ER with acute, unilateral pelvic pain. She is light-headed and reports syncope at home. She mentions her last menstrual period was about 7 weeks ago, and a recent home pregnancy test was positive. Her blood pressure is 90/58 mmHg, heart rate is 115 bpm, and she is afebrile. Upon physical examination, adnexal tenderness is noted. Her bedside urine pregnancy test confirms pregnancy. What diagnostic test should be performed immediately?
Immediate bedside transabdominal ultrasound
Dilation and curettage (D&C) to diagnose intrauterine pregnancy
Quantitative serum human chorionic gonadotropin (hCG) testing
Setup for transvaginal ultrasound