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Ectopic Pregnancy - CCS Case Guide

Key Takeaway: Ectopic pregnancy occurs when a fertilized ovum implants outside the uterine cavity, most commonly in the fallopian tube. It is a leading cause of first-trimester maternal mortality.

Ectopic pregnancy occurs when a fertilized ovum implants outside the uterine cavity, most commonly in the fallopian tube. It is a leading cause of first-trimester maternal mortality. Early diagnosis with beta-hCG and transvaginal ultrasound is critical to prevent rupture.

Recognizing the Ectopic Pregnancy Presentation

  • History: Amenorrhea or missed period, unilateral pelvic or lower abdominal pain, vaginal bleeding; risk factors include prior ectopic, PID, IUD use, tubal surgery, or assisted reproduction
  • Physical Exam: Unilateral adnexal tenderness, possible adnexal mass, cervical motion tenderness, uterus slightly enlarged but smaller than expected for dates; peritoneal signs if ruptured
  • Vital Signs: May be normal in unruptured; tachycardia and hypotension indicate rupture with hemorrhage

Immediate Actions (First 5 Minutes)

These orders should be placed immediately — timing is scored:

Critical First Orders

  • ✓ IV access
  • ✓ Stat quantitative beta-hCG
  • ✓ Type and screen (Rh status)
  • ✓ Transvaginal ultrasound
  • ✓ CBC and BMP
  • ✓ If hemodynamically unstable: large-bore IVs, crystalloid bolus, emergent OB/GYN consult for OR

Complete Workup

After initial stabilization, complete the diagnostic workup:

  • Quantitative beta-hCG level
  • Serial beta-hCG (48 hours apart if diagnosis uncertain)
  • Transvaginal ultrasound (no intrauterine pregnancy with beta-hCG > discriminatory zone ~1500-2000)
  • CBC (baseline hemoglobin)
  • BMP
  • Type and screen with Rh status
  • Liver and renal function tests (if methotrexate candidate)
  • Blood group and antibody screen

Treatment

Medical (Methotrexate)

  • Single dose methotrexate 50 mg/m2 IM
  • Criteria: hemodynamically stable, unruptured, mass < 3.5 cm, no fetal cardiac activity, beta-hCG < 5000
  • Monitor beta-hCG on days 4 and 7 (expect > 15% decline between days 4-7)
  • Repeat dose if inadequate decline; switch to surgery if failure
  • Avoid NSAIDs, folic acid supplements, alcohol, and intercourse during treatment

Surgical

  • Laparoscopic salpingectomy (preferred for ruptured or failed medical management)
  • Salpingostomy if desire for future fertility and contralateral tube absent
  • Emergent laparotomy if hemodynamically unstable

Supportive

  • IV fluid resuscitation if hemorrhage
  • Transfuse pRBCs if significant blood loss
  • RhoGAM (anti-D immunoglobulin) if Rh-negative
  • Pain management
  • Emotional support and counseling

Common Pitfalls

Scoring Tip: These are the most commonly missed actions for Ectopic Pregnancy cases.

  • Not considering ectopic in any reproductive-age woman with abdominal pain or vaginal bleeding
  • Relying on a single beta-hCG without serial monitoring or ultrasound
  • Giving methotrexate when contraindicated (unstable, ruptured, fetal cardiac activity)
  • Forgetting RhoGAM for Rh-negative patients
  • Not obtaining hepatic and renal function before methotrexate
  • Assuming an IUD prevents ectopic pregnancy

Disposition

  • Emergent OR if ruptured or hemodynamically unstable
  • Observation and serial beta-hCG if pregnancy of unknown location and stable
  • Outpatient management possible after methotrexate if reliable follow-up
  • Serial beta-hCG until undetectable to confirm resolution
  • OB/GYN follow-up within 1 week

Key Orders Checklist

  • ☐ Quantitative beta-hCG
  • ☐ Transvaginal ultrasound
  • ☐ Type and screen with Rh status
  • ☐ CBC
  • ☐ Hepatic and renal panel (pre-methotrexate)
  • ☐ RhoGAM if Rh-negative
  • ☐ OB/GYN consult

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