Table 2.

Differences in tidal volumes (V_T) measured by turbine driven ventilator and lung simulator at different levels of leak flow.

Simulated Condition	(TDV-LS) LF 30 L/min	(TDV-LS) LF 50 L/min	(TDV-LS) LF 80 L/min	P value
Normal	31(4)+	31(3)+	24(4)*°	<0.001

Data are expressed in ml and reported as mean (±SD).

LF: leak flow (expressed in liters per minute); TDV: turbine driven ventilator; LS: lung simulator; (TDV-LS): difference between V_T measurements by turbine driven ventilator and lung simulator.

*Different from 30; ^°Different from 50; ⁺Different from 80.