Which of the following tube has high pressure - low volume cuff-

Laser tube needs to create high pressure seal so that oxygen rich gas does not leak from lower to upper airway. Thus provided with high pressure low volume cuff. The most frequent laser related complication is airway fire. Laser Resistant ETTs are used to prevent airway fires during laser surgery of the airway. Initially, fires are located on surface of ETT and cause thermal injury to tissues. If the fire burns through to interior of ETT, O2 and positive pressure ventilation create a blow torch effect, blowing heat and toxic products down into lung. Cuff puncture allowing O2 enriched atmosphere can also increase chance of fire after laser burst. the cuff of Laser tube is special low volume high pressure.