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Virchow Triad — NDEB AFK MCQ

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HardBiomedical SciencesVirchow TriadNDEB AFK

Which component of the triad of Virchow is most relevant to the risk of deep vein thrombosis in a dental patient positioned in a supine dental chair for a prolonged procedure?

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Correct answer: B — Venous stasis (blood flow stagnation)

Virchow's triad (endothelial injury, venous stasis, hypercoagulability) describes the three factors predisposing to thrombosis. For dental patients, prolonged supine positioning during lengthy procedures contributes to venous stasis in the lower extremities, increasing DVT risk — particularly in patients with additional risk factors (obesity, oral contraceptive use, recent surgery, cancer, immobility). Encouraging leg movement and periodic position changes can mitigate this risk.

Reference: Kumar – Robbins & Cotran Pathologic Basis of Disease, 10th ed., 2021