HPV Inhibition OLV — FRCA Final MCQ

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HardCardiothoracic AnaesthesiaHPV Inhibition OLVFRCA Final

HPV in the non-ventilated lung during OLV is INHIBITED by:

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Correct answer: B — Hypocapnia

HPV is inhibited by volatile agents (dose-dependent, significant >1 MAC), vasodilators, hypothermia, extreme mixed venous PO2. TIVA with propofol does NOT inhibit HPV.

Reference: Lumb – 2022 – Nunn's Physiology; RCOA – 2023 – Cardiothoracic