Step 3 CCS: GI Bleeding

GI bleeding CCS cases test your ability to resuscitate aggressively, risk-stratify using validated scores, and coordinate endoscopy timing. You must distinguish upper from lower GI bleeding, manage variceal bleeding differently from ulcer bleeding, and know when to transfuse. Delayed endoscopy or missed variceal bleeding protocol are common point-losing errors.

Clinical Approach — What Attendings Do First

The First Minute

  • Two large-bore (16-18 gauge) peripheral IVs — do not accept a single 20-gauge line
  • Type and crossmatch 4 units pRBCs, CBC, BMP, PT/INR, hepatic function panel, lactate
  • Normal saline 1 L bolus if tachycardic or hypotensive
  • NPO — endoscopy is coming
  • Foley catheter for urine output monitoring (target >0.5 mL/kg/hr)

Key Orders

  • IV pantoprazole 80 mg bolus then 8 mg/hr continuous infusion (for suspected upper GI bleed)
  • If cirrhosis/varices suspected: octreotide 50 mcg IV bolus → 50 mcg/hr AND ceftriaxone 1g IV daily
  • Transfuse pRBCs if Hgb <7 (or <8 with active CAD) — restrictive strategy improves outcomes
  • GI consult for urgent EGD
  • NG lavage if upper vs lower source uncertain (grossly bloody = upper; bile without blood = likely lower)
  • Hold anticoagulants and antiplatelets; reverse warfarin with vitamin K 10 mg IV + FFP if INR >1.5 with active bleed
  • Rectal exam and stool guaiac (melena vs hematochezia helps localize)

Time-Sensitive Actions

  • Transfuse immediately if hemodynamically unstable — do not wait for crossmatch (use O-negative)
  • EGD within 12 hours for high-risk upper GI bleed, within 24 hours for stable patients
  • Start antibiotics (ceftriaxone) in ANY cirrhotic with GI bleed — reduces mortality, even without confirmed infection
  • If bleeding not controlled after endoscopy: interventional radiology consult for angiographic embolization

Common CCS Pitfalls

  • Ordering PPI alone for suspected variceal bleed — octreotide + antibiotics are the variceal protocol
  • Over-transfusing in cirrhotic patients (raises portal pressure, worsens bleeding) — target Hgb 7-8
  • Forgetting ceftriaxone prophylaxis in cirrhotic GI bleed — this is a mortality benefit
  • Not ordering type and crossmatch early — delays blood availability when you need it urgently
  • Failing to advance clock to endoscopy — CCS expects you to move to definitive diagnosis/treatment

Frequently Asked Questions

What should I order in the first 5 minutes of a CCS GI bleeding case?

Two large-bore IVs (16-18 gauge), type and crossmatch for 4 units pRBCs, CBC, BMP, PT/INR, lactate, hepatic function panel. Start normal saline 1 L bolus. If hemodynamically unstable (HR >100, SBP <90), transfuse pRBCs immediately without waiting for crossmatch (use O-negative). Place a Foley catheter for urine output monitoring. NPO status for anticipated endoscopy.

How do I manage suspected variceal bleeding on CCS?

Start octreotide 50 mcg IV bolus then 50 mcg/hr infusion AND ceftriaxone 1g IV q24h (antibiotic prophylaxis reduces mortality in cirrhotic GI bleed). IV PPI is NOT the primary therapy for variceal bleeding — octreotide is. Urgent GI consult for endoscopic band ligation within 12 hours. If massive hemorrhage, consider Blakemore tube as bridge to endoscopy. Avoid over-transfusing — target Hgb 7-8 in cirrhotics.

When do I order endoscopy in a CCS GI bleed case?

Upper GI bleed: EGD within 24 hours of presentation for most patients, within 12 hours for high-risk (Glasgow-Blatchford score ≥12, hemodynamic instability, suspected variceal bleeding). Lower GI bleed: colonoscopy within 24 hours after adequate bowel prep. If massive lower GI bleed with instability, consider CT angiography or tagged RBC scan to localize, then angiographic embolization or surgery.

Related Organ System Topics

Gastroenterology

Gastroenterology is heavily tested on USMLE Step 3, covering GI bleeding, inflammatory bowel disease, liver disease, pancreatitis, and colorectal cancer screening.

Emergency Medicine

Emergency medicine on USMLE Step 3 covers the initial evaluation and stabilization of critically ill and injured patients.

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