Fig. 1From: Comparisons of the segments of left-sided double-lumen tracheobronchial tubes as industrial productsMeasurement of length of the cuff and tip of the bronchial segment of the tubes. We measured the length of the cuffs and tips of the bronchial segment of the tubes after we set the intracuff pressure equal to 2.0 ± 0.1 kPa (about 20 cmH2O). One of the most important bronchial segments is “A (a+b)” because it plays a major part in the “margin of safety”Back to article page