Postural and Thermal Effects on Pulmonary Diffusing Capacity at Rest

Effect of lung inflation on pulmonary diffusing capacity at rest and exercise.

Steady state measurements of the diffusing capacity of the lung are made at operational lung volume, whereas measurements by the breath-holding method are customarily made at full inspiration. The effect of lung inflation on diffusing capacity must be taken into account before the steady state and breath-holding methods can be validly compared. At rest the single breath diffusing capacity of th...

Diffusing capacity and pulmonary capillary blood flow at hyperbaric pressures.

Postural variations of pulmonary diffusing capacity in insulin-dependent diabetes mellitus.

STUDY OBJECTIVE To assess whether posture-related changes of diffusing capacity could be considered as an early sensitive marker of pulmonary abnormalities in patients with insulin-dependent diabetes mellitus (IDDM) and whether the postural variations of pulmonary capillary blood volume (Vc) could reflect the lung capillary damage that characterizes the diabetic microangiopathy. DESIGN Carbon...

Intrabreath diffusing capacity of the lung in healthy individuals at rest and during exercise.

BACKGROUND Traditional approaches to measuring the diffusing capacity of the lung for carbon monoxide (DLCO) treat the lung as a single, well-mixed compartment and produce a single value for DLCO to represent an average diffusing capacity of the lung (DL). Because DL distribution in the lung is inhomogeneous, and changes in the DL in diseased lungs may be regional, measuring regional DL, especi...

Effects of body position and age on membrane diffusing capacity and pulmonary capillary blood volume.

The effects of body position and age on the membrane diffusing capacity (Dm), pulmonary capillary blood volume (Vc), and the single breath carbon monoxide diffusing capacity (Dco) were evaluated in the erect (sitting) and supine positions in 16 normal young men (under 40 years old, younger group) and in 13 older men (over 40 years old, older group). Dm and Vc were estimated by several measureme...