GI bleeding management

GI bleeding management

GI bleeding management

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Initial Rx - Stabilize First!

Vascular Access: IV, Venous Cutdown, and IO

  • ABCs: Assess & secure Airway, Breathing, Circulation. Intubate for altered mental status or hematemesis.
  • IV Access: Place 2 large-bore (≥18G) peripheral IV catheters for rapid infusion.
  • Resuscitation: Begin aggressive IV fluid resuscitation with crystalloids (NS or LR).
  • Transfusion Trigger: Transfuse packed RBCs (pRBCs) for Hemoglobin <7 g/dL.
  • Key Labs: Type & crossmatch, CBC, coagulation studies (PT/INR, PTT), LFTs, BUN/Cr.
  • Medication: Start a high-dose IV Proton Pump Inhibitor (PPI) drip (e.g., pantoprazole).

⭐ In patients with known Coronary Artery Disease (CAD), the transfusion threshold is higher; maintain Hb >9 g/dL to ensure adequate myocardial oxygen delivery.

Localize the Bleed - Up or Down?

  • Upper GI Bleed (UGIB): Proximal to Ligament of Treitz.

    • Presentation: Hematemesis (vomiting blood/coffee grounds), melena (black, tarry stool).
    • Key Lab: ↑ BUN/Cr ratio > 20.
  • Lower GI Bleed (LGIB): Distal to Ligament of Treitz.

    • Presentation: Hematochezia (bright red blood per rectum).
    • Melena can indicate a slow-bleed, right-sided LGIB.

⭐ A BUN/Cr ratio > 20 strongly suggests an upper GI source. This is due to the digestion of blood proteins in the upper gut, leading to increased urea absorption.

Upper GI Bleed - Variceal vs. Ulcer

  • Initial Steps (All UGIB): Assess ABCs. Secure 2 large-bore IVs. Transfuse if Hb <7 g/dL (or <9 in CAD). Start high-dose IV PPI. Consult GI for urgent endoscopy (<24h).

  • Variceal Bleed (from Portal HTN):

    • Acute Rx: Octreotide (reduces splanchnic flow), prophylactic ceftriaxone, and endoscopic variceal ligation (banding).
    • Refractory: Balloon tamponade (Sengstaken-Blakemore) or TIPS for persistent bleeding.
  • Peptic Ulcer Bleed (H. pylori/NSAIDs):

    • Acute Rx: Endoscopic therapy (clips, thermal coagulation, epinephrine injection) combined with high-dose IV PPI.
    • Test and treat for H. pylori after the acute bleed resolves.

⭐ In cirrhotic patients with variceal bleeding, prophylactic antibiotics (e.g., ceftriaxone) are crucial as they significantly reduce the risk of bacterial infections like SBP and improve overall survival.

Lower GI Bleed - Colon Carnage

  • Etiology: Common causes include diverticulosis, angiodysplasia, ischemic colitis, and malignancy.

    • Diverticulosis: Most common cause of massive LGIB. Abrupt, painless, large-volume hematochezia. Usually stops spontaneously (>80%).
    • Angiodysplasia: Dilated, tortuous submucosal vessels. Painless, recurrent, low-grade bleeding. Associated with CKD and aortic stenosis.
    • Ischemic Colitis: "Watershed" areas (splenic flexure). Abdominal pain followed by bloody diarrhea, often post-hypotension.
  • Diagnosis & Management:

    • Initial step: Hemodynamic resuscitation (ABCs, 2 large-bore IVs).
    • Colonoscopy is the primary diagnostic and therapeutic tool.
    • If bleeding is massive/obscures view: CTA or tagged RBC scan.
    • Treatment: Endoscopic therapy (clipping, cautery), angiography with embolization, or surgery for refractory cases.

Heyde's Syndrome: A classic association between aortic stenosis and bleeding from angiodysplasia due to acquired von Willebrand factor deficiency.

High‑Yield Points - ⚡ Biggest Takeaways

  • Initial management requires two large-bore IV lines for resuscitation before any diagnostic steps.
  • For suspected variceal bleeding, immediately administer octreotide and prophylactic ceftriaxone.
  • All patients with upper GI bleeding should receive IV proton pump inhibitors (PPIs).
  • Endoscopy (EGD) is the cornerstone for both diagnosis and therapy in upper GI bleeds.
  • Transfuse packed RBCs for hemoglobin <7 g/dL in most patients (<9 g/dL in cardiovascular disease).
  • Colonoscopy is the procedure of choice for evaluating hemodynamically stable lower GI bleeds.
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Practice Questions: GI bleeding management

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A 57-year-old man is brought to the emergency department by his family because of several episodes of vomiting of blood in the past 24 hours. He has a history of alcoholic cirrhosis and is being treated for ascites with diuretics and for encephalopathy with lactulose. His vital signs include a temperature of 36.9°C (98.4°F), pulse of 85/min, and blood pressure of 80/52 mm Hg. On examination, he is confused and unable to give a complete history. He is noted to have jaundice, splenomegaly, and multiple spider angiomas over his chest. Which of the following is the best initial management of this patient?

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