A 28-year-old woman presents to the emergency department with acute lower abdominal pain and vaginal spotting for 2 days. She reports a missed period of 6 weeks. On examination, she is pale, tachycardic (HR 110/min), and has severe right lower quadrant tenderness with guarding. Serum β-hCG is 8,500 mIU/mL. Transvaginal ultrasound shows no intrauterine gestational sac, free fluid in the pouch of Douglas, and a 3 cm mass in the right adnexa. Her hemoglobin is 8.5 g/dL (baseline 12 g/dL). What is the most appropriate immediate management?

Explanation

## Clinical Presentation & Diagnosis This patient has a **ruptured ectopic pregnancy** with hemodynamic instability and signs of hemorrhagic shock: **Key Point:** Ruptured ectopic pregnancy is a surgical emergency. The constellation of hemodynamic instability (tachycardia, pallor), acute severe pain, hemoconcentration (Hb drop of 3.5 g/dL), free intra-abdominal fluid, and adnexal mass with positive β-hCG is pathognomonic. ## Why Laparoscopy with Salpingectomy is Correct **High-Yield:** In a hemodynamically unstable patient with a ruptured ectopic pregnancy (evidenced by free fluid, adnexal mass, and acute anemia), **emergency surgical intervention is the standard of care**. Laparoscopy (or laparotomy if unstable) with salpingectomy is the definitive treatment. **Clinical Pearl:** The decision tree for ectopic pregnancy management hinges on hemodynamic stability: - **Stable + unruptured + β-hCG <5,000:** Medical (methotrexate) or expectant - **Stable + unruptured + β-hCG >5,000:** Laparoscopic salpingostomy or salpingectomy - **Unstable or ruptured:** Emergency laparoscopy/laparotomy with salpingectomy This patient meets criteria for emergency surgery: tachycardia, severe pain, free fluid, and acute anemia. ## Why Other Options Are Wrong | Option | Reason | |--------|--------| | Methotrexate | Medical management is contraindicated in hemodynamically unstable patients and those with rupture. Methotrexate requires 7–14 days to work and will not arrest active hemorrhage. | | Expectant management | Expectant management (observation with serial β-hCG) is only appropriate in stable patients with unruptured ectopic and declining β-hCG. This patient is unstable with rupture. | | Mifepristone + misoprostol | Medical abortion agents are not indicated for ectopic pregnancy and will not address intra-abdominal hemorrhage. | ## Management Algorithm ```mermaid flowchart TD A[Suspected Ectopic Pregnancy]:::outcome --> B{Hemodynamically Stable?}:::decision B -->|No - Rupture/Shock| C[Emergency Laparoscopy/Laparotomy]:::urgent C --> D[Salpingectomy or Salpingostomy]:::action B -->|Yes - Unruptured| E{β-hCG Level?}:::decision E -->|< 1000| F[Expectant or Medical Mgmt]:::action E -->|1000-5000| G[Laparoscopic Salpingostomy]:::action E -->|> 5000| H[Laparoscopic Salpingectomy]:::action D --> I[Restore Hemodynamics]:::action ``` **Key Point:** Salpingectomy (vs. salpingostomy) is preferred when the tube is ruptured, severely damaged, or when there is hemodynamic instability, as it is faster and definitive.