Table 3.
Pattern of breathing and arterial blood gases of the 25 ESKD patients before and after dialysis.
| Before dialysis n = 25 |
After dialysis n = 25 |
P value | |
|---|---|---|---|
| V T (lt) | 0.7 ± 0.2 | 0.6 ± 0.2 | NS |
| T E (sec) | 1.8 ± 0.5 | 1.7 ± 0.5 | NS |
| T I (sec) | 1.5 ± 0.3 | 1.4 ± 0.3 | NS |
| V T/T I (lt/sec) | 0.5 ± 0.2 | 0.4 ± 0.2 | NS |
| T I/T TOT (sec) | 0.4 ± 0.04 | 0.5 ± 0.03 | NS |
| V E (lt/min) | 13.0 ± 4.0 | 12.0 ± 5.0 | NS |
| RR (breaths/min) | 19.0 ± 5.0 | 20.0 ± 4.0 | NS |
| P 0.1 (cm H2O) | 3.0 ± 0.3 | 0.7 ± 0.2 | <0.001 |
| P 0.1/V T% VC pred., acc | 0.2 ± 0.1 | 0.05 ± 0.02 | <0.001 |
| pH | 7.4 ± 0.1 | 7.5 ± 0.1 | <0.001 |
| PaO2 (mm Hg) | 98.0 ± 11.0 | 97.0 ± 14.0 | NS |
| PaCO2 (mm Hg) | 31.0 ± 4.0 | 33.0 ± 5.0 | 0.02 |
| HCO3 (mmol) | 20.0 ± 4.0 | 25.0 ± 3.0 | <0.001 |
Values are mean ± SD obtained in the seated position. Unless otherwise specified, values are expressed as % predicted. Statistical significance tested with Student's paired t-test before and after dialysis. V T: tidal volume; V E: minute ventilation; T E: duration of expiration; T I: duration of inspiration; T TOT: total cycle duration; V T/T I: mean inspiratory flow; T I/T TOT: duty cycle; f: frequency of breathing; P 0.1: mouth occlusion pressure; % pred. VC: vital capacity % predicted; PaO2: arterial pressure tension of oxygen; PaCO2: arterial pressure tension of carbon dioxide; HCO3: bicarbonate anion.