Table 1.

Relative error of CDI estimates with and without gas calibration.

		With Gas Calibration	Without Gas Calibration
Before ABL calibration	pH	.1 ± .2%	9.0 ± 2.6%*
	pCO2	−2.9 ± 5.2%	−26.5 ± 8.8%*
	pO2	.3 ± 4.5%	−37.8 ± 5.6%*
After ABL calibration	pH	.2 ± .2%	.1 ± .2%
	pCO2	−1.0 ± 2.0%	−1.1 ± 2.2%
	pO2	−.9 ± 7.8%	−.5 ± 8.1%

Values are mean ± SD.

^*Mean values are significantly different from zero (p < .05).