Fig. 6

Effect on \( the\ {\dot{V}}_{\mathrm{SWEEP}} \) required to maintain P_aCO₂ at 40 mmHg, of \( {\dot{Q}}_{EC} \) and \( \frac{{\dot{Q}}_S}{{\dot{Q}}_T} \). As \( {\dot{Q}}_{EC} \) is reduced, the required \( {\dot{V}}_{\mathrm{SWEEP}} \) rises, though the rise is small until \( {\dot{Q}}_{EC} \) is < 2 l/min. The required \( {\dot{V}}_{\mathrm{SWEEP}} \) rises as \( \frac{{\dot{Q}}_S}{{\dot{Q}}_T} \) rises