Drift of the Po2 electrode
| O2 fraction . | 0% O2 . | . | 21% O2 . | . | 100% O2 . | . | |||
|---|---|---|---|---|---|---|---|---|---|
| . | Po2,calc (mmHg) . | % Drift . | Po2,calc (mmHg) . | % Drift . | Po2,calc (mmHg) . | % Drift . | |||
| Hour 0 | 0 | — | 143±4 | — | 648±37 | — | |||
| Hour 24 | 0 | 0 | 132±7 | 7.3±5.1 | 449±63 | 30.8±7.3 | |||
| Hour 48 | 0 | 0 | 128±8 | 10.5±5.8 | 419±68 | 35.6±7.7 | |||
| O2 fraction . | 0% O2 . | . | 21% O2 . | . | 100% O2 . | . | |||
|---|---|---|---|---|---|---|---|---|---|
| . | Po2,calc (mmHg) . | % Drift . | Po2,calc (mmHg) . | % Drift . | Po2,calc (mmHg) . | % Drift . | |||
| Hour 0 | 0 | — | 143±4 | — | 648±37 | — | |||
| Hour 24 | 0 | 0 | 132±7 | 7.3±5.1 | 449±63 | 30.8±7.3 | |||
| Hour 48 | 0 | 0 | 128±8 | 10.5±5.8 | 419±68 | 35.6±7.7 | |||
Data are from four electrodes (means ± s.d.)and are expressed in mmHg (1 mmHg=0.133 kPa). Po2,calc =Po2 calculated with the electrode output from a given time and with the hour 0 regression equation (generated from the 0 and 21%calibration points). % Drift = [(electrode outputhour 0 —electrode outputhour n)/electrode outputhour 0] ×100.