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Table 3 Experimental Rohrer’s constants for ETT, and lung airways

From: The effects of pressure- versus volume-controlled ventilation on ventilator work of breathing

 

ETT [35]

Lung airways

Normal [36]

COPD [37]

K1 (cmH2O.L−1.s)

0.85

1.85

5.03

K2 (cmH2O.L−2.s2)

6.35

0.43

2.69