A 28-year-old woman presents to the emergency department with severe right lower abdominal pain and vaginal bleeding for 2 days. She reports a missed period of 6 weeks. On examination, she is pale, tachycardic (HR 110/min), and has a positive cervical motion tenderness with right adnexal mass. Serum β-hCG is 8,500 mIU/mL. Transvaginal ultrasound shows no intrauterine gestational sac, free fluid in the pelvis, and a 3 cm mass in the right fallopian tube. What is the most appropriate immediate management?

Explanation

## Clinical Assessment This patient presents with a **ruptured ectopic pregnancy** with hemodynamic instability and clinical signs of intra-abdominal hemorrhage. ### Key Diagnostic Features - **Positive predictive findings:** Absent intrauterine gestational sac + adnexal mass on ultrasound + free pelvic fluid - **Hemodynamic instability:** Tachycardia (HR 110), pallor, and severe pain indicate rupture with active bleeding - **β-hCG level:** 8,500 mIU/mL is consistent with ectopic pregnancy (lower than expected for intrauterine pregnancy at 6 weeks) ## Management Algorithm ```mermaid flowchart TD A[Confirmed ectopic pregnancy]:::outcome --> B{Hemodynamically stable?}:::decision B -->|No - Rupture/shock| C[Emergency surgery]:::urgent B -->|Yes - Unruptured| D{β-hCG level & patient factors?}:::decision D -->|High β-hCG or contraindications| E[Surgical management]:::action D -->|Low β-hCG, reliable patient| F[Medical or expectant]:::action C --> G[Salpingectomy ± repair]:::action E --> G F --> H[Methotrexate or monitoring]:::action ``` ### Why Surgery Is Indicated Here **Key Point:** Ruptured ectopic pregnancy is a **surgical emergency**. Signs of rupture include hemodynamic instability, severe pain, free fluid on ultrasound, and tachycardia. **Clinical Pearl:** The presence of a **3 cm mass** in the fallopian tube with **free pelvic fluid** and **hemodynamic changes** (tachycardia, pallor) indicates active hemorrhage and imminent or actual rupture. **High-Yield:** Methotrexate is contraindicated in ruptured ectopic pregnancy because: - It requires 4–7 days to work; the patient cannot wait - Ongoing hemorrhage demands immediate hemostasis - Medical management is reserved for **unruptured, hemodynamically stable** cases ## Surgical Approach **Salpingectomy** is the standard for: - Ruptured tubes - Recurrent ectopic in same tube - Severely damaged tube **Salpingostomy** (tube-sparing) may be considered in unruptured cases with hemodynamic stability and desire for future fertility, but is NOT appropriate in rupture. [cite:Jeffcoate's Principles of Gynaecology 8e Ch 8]