Fig. 1.

Representative tracings obtained during a venous compliance trial. Thigh-collecting cuff pressure was increased from 0 to 60 mmHg after a 1-min baseline period (point A) and maintained at this level for 8 min (minutes 1–9). After this period collecting cuff pressure was reduced to 0 mmHg over the course of 60 s (starting at point B). Changes in calf volume were measured using strain-gauge plethysmography. Calf venous compliance is determined from pressure and volume data obtained between minutes 8 and 9.