Pre-Endoscopy Triage: Anticoagulation and Fasting Guidelines

Clinical Bottom Line

Pre-Procedural Factor	Standard Metric	High-Risk Variance
Strict Fasting (NPO)	Clear liquids up to 2 hours prior; Solids 8 hours prior.	Gastroparesis or Achalasia requires a prolonged 24-48 hour liquid diet.
Aspirin / NSAIDs	Continue (Do not hold).	Endoscopic mucosal resection (EMR) may require situational holding.
DOACs (e.g., Eliquis)	Hold 24-48 hours prior to high-risk therapeutic procedures.	Ensure bridge therapy (Lovenox) is NOT typically required for DOACs.

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Optimizing the Endoscopic Substrate

A "smooth" procedure is entirely dictated by pre-procedural triage. The two most critical vectors are the adequacy of mucosal lavage and the management of peri-procedural antithrombotic therapy.

The Anesthetic Airway Risk

Standard ASA fasting guidelines are paramount to prevent catastrophic pulmonary aspiration under sedation. However, endoscopists must aggressively screen for motility disorders (e.g., severe diabetic gastroparesis). A standard 8-hour fast is insufficient for a paralyzed stomach; these patients frequently present with a stomach locked full of retained food, rendering the procedure non-diagnostic and forcing an emergent intubation to protect the airway.

Anticoagulation for Therapeutic Resection

While diagnostic endoscopies with standard mucosal biopsies are safe to perform on fully therapeutically anticoagulated patients (e.g., on Warfarin or DOACs), advanced procedures like large polypectomy, EMR, or ESD carry an unacceptable delayed hemorrhage risk. The precise calculation of when to hold a Direct Oral Anticoagulant (DOAC) relies on the drug's specific pharmacokinetics and the patient's individual renal clearance (CrCl).

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Clinical guidelines summarized by the Gastroscholar Research Team. Last updated: 2026. This article is intended for physicians.