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Table 3 Effects of respiratory maneuvers on airway blood flow (Q̇ aw )

From: Effect of airway acidosis and alkalosis on airway vascular smooth muscle responsiveness to albuterol

   Pre-maneuver Q̇aw awduring steady state aw15 min post albuterol
Quiet breathing Mean ± SE 38.1 ± 1.4 37.2 ± 1.5 53.7 ± 2.1*
Median 37.7 35.7 54.3
25% quartile 33.8 34.1 46.9
75%quartile 42.1 41.9 58.7
Eucapnic hyperventilation Mean ± SE 41.8 ± 4.3 42.6 ± 4.3 56.4 ± 4.0*
Median 40.7 42.7 49.7
25% quartile 34.8 34.8 46.7
75% quartile 48.8 48.8 61.7
Hypocapnic hyperventilation Mean ± SE 42.9 ± 2.8 45.2 ± 3.4 45.1 ± 2.9
Median 40.1 42.2 43.7
25% quartile 37.2 35.0 38.8
75% quartile 49.1 49.7 54.1
Hypercapnic hyperventilation Mean ± SE 42.1 ± 2.4 44.8 ± 3.8 46.7 ± 4.0
Median 37.5 44.7 43.7
25% quartile 35.5 34.1 38.4
75% quartile 46.2 57.1 52.2
  1. aw is expressed in μl.min-1.mL-1 . * p < 0.05 vs. steady state.