Marked pericardial inhomogeneity of specific ventilation at total lung capacity and beyond.

摘要: We measured regional ventilation at 1 liter above functional residual capacity (FRC+1L) and total lung (TLC) in three normal subjects four elite breath-hold divers, TLC after glossopharyngeal insufflation (TLC+GI) the divers. Hyperpolarized 3He MRI was used to map local per unit volume over entire lung. At above, there markedly increased of lungs pericardial region compared with relatively uniform throughout rest The distribution fractional regionally FRC+1L, a small non-gravitational cephalocaudal gradient specific supine posture. Our observations high volumes are consistent effect pleural tension concave region, which promotes expansion subjacent lung, leading higher effective compliance ventilation.