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Table 4
Error distribution of the calculated in-line PaCO2 and the correlation coefficient (R) between the error in mmHg and patient weight.
| Error distributions (mmHg) | 1st gas (%) | 2nd gas (%) | 3rd gas (%) | 4th gas (%) | 5th gas (%) | 4th + 5th (%) |
|---|---|---|---|---|---|---|
| Error ≤ 0 | 75.3 | 44.1 | 26.8 | 18.2 | 66.0 | 28.0 |
| 0 < Error ≤ 5 | 18.5 | 42.6 | 73.2 | 46.8 | 28.0 | 40.0 |
| 5 < Error ≤ 10 | 2.5 | 13.2 | 0 | 23.4 | 6.0 | 16.0 |
| 10 < Error ≤ 15 | 2.5 | 0 | 0 | 5.2 | 0 | 6.0 |
| 15 < Error ≤ 20 | 1.2 | 0 | 0 | 5.2 | 0 | 8.0 |
| 20 < Error ≤ 25 | 0 | 0 | 0 | 1.3 | 0 | 2.0 |
| R (error vs. weight)$ | 0.22 | 0.17 | −0.10 | −0.24 | −0.14 | −0.21 |
%: percentage of patients, see Table 3 to find total patient numbers for each blood gas series; $: R value of the linear correlation analysis between the error in mmHg and patient weight.
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