<prompt> Operation theatre fire is most commonly due to?Argon beam coagulatorsLaserFiber optic illuminationElectrosurgical equipment  <response>: ANSWER: D Electrosurgical equipmentREF: British Journal of Anesthesia Volume 50, Issue 7 p. 659-664, Current Opinion in Anaesthesiology: December 2008 Volume 21 Issue 6 p. 790-795The two most common source of operation theatre fire is electrosurgical unit ESU and lasers.Other equipments that can produces fire are, but not limited to, fiber optic light cables, light source box, drills, saws burrs, handheld cautery, argon beam coagulators and defibrillators.ECRIs analysis of case reports showT that the most common ignition sources are electrosurgical instruments 68 and lasers 13; and the most common fire location is the airway 34, head or face 28, and elsewhere on or inside the patient 38, An oxygen-enriched atmosphere wTas a contributing factor in 74 of all cases. 