Fig. 1
From: Effects of lubrication on air-sealing performance of a pediatric cuffed tracheal tube
Experimental setup for the in vitro assessment of air leakage
A tracheal model was intubated with a pediatric cuffed endotracheal tube that was connected to a test lung. An anesthesia machine was connected to the endotracheal tube to ventilate the test lung. We placed a gas sampling tube just above the cuff to confirm air leakage by detecting an increase in oxygen concentration after changing the inspiratory gas from air to oxygen.