Regional lung ventilation in XXXX .

@entity1 @entity82 @entity2003 @entity1009 @entity1691 @entity358
@entity1 with @entity1691 ( @entity1691 ) sometimes develop @entity82 and cavitation. It has been suggested that one causative factor is reduced apical ventilation due to @entity2003 of the thoracic cage. We measured regional ventilation in 27 @entity1 with @entity1691 and 18 normal volunteers. Twelve @entity1 (Group A) had chest expansion greater than 2 cm, twelve (Group B) had chest expansion of 2 cm or less and three (Group C) had @entity358 on chest radiographs; @entity1 in Groups A and B had no radiographic lung lesions. Ventilation per unit volume (VE/VA @entity1009 ) was calculated from 81Krm washout curves. The ratio of upper zone to lower zone ventilation (VR) was calculated. VR in Group A (0.74 +/- 0.11) and group B (0.75 +/- 0.12) was not significantly different from VR in controls (0.76 +/- 0.08). There was no significant correlation between VR and FVC, FEV1 or maximal chest expansion. In @entity1 with apical @entity82 only the radiographically abnormal areas had reduced ventilation. @entity1 with @entity1691 do not underventilate the upper zones of the lungs except in the presence of radiographically visible @entity82 .
