Additional pressure in front of the membrane when the eNose is connected to the membrane gas outlet
| Membrane# | In-membrane pressure mmHg | Additional pressure cmH2O |
| Maquet | 60 | −0.56 (−2.00–0.33) |
| 120 | −0.18 (−3.00–1.33) | |
| 150 | 0.07 (−1.33–1.00) | |
| Medos | 60 | −0.04 (−0.67–0.33) |
| 120 | −0.02 (−1.00–0.67) | |
| 150 | 0.04 (−0.33–0.33) | |
| Novalung | 60 | −0.11 (−1.33–0.00) |
| 120 | −0.31 (−1.33–0.00) | |
| 150 | −0.04 (−0.67–0.33) | |
| Sorin | 60 | −0.04 (−0.67–0.00) |
| 120 | −0.16 (−1.00–0.33) | |
| 150 | 0.00 (0.00–0.00) |
Data for additional pressure are presented as mean (range). #: see main text for details of membranes.