Test Limitations A sample with a Carbon Dioxide concentration exceeding the linearity limit should be diluted with 0.9% saline and reassayed incorporating the dilution factor in the calculation of the value.
Refernce intervals 22-29 mmol/L (22-29 mEq/L) These values are suggested guidelines. It is recommended that each laboratory establish the normal range for the area in which it is located.
Performance characteristics Data presented was collected on Hitachi® 717 analyzer unless otherwise stated. Results Carbon Dioxide concentration is reported as mmol/L (mEq/L). Reportable Range The linearity of the procedure described is 50.0 mmol/L (mEq/L). The lower limit of detection of the procedure described is 1.0 mmol/L (mEq/L). This data results in a reportable range of 1.0-50.0 mmol/L (1.0-50.0 mEq/L).
Precision studies Precision estimates for serum were obtained using two concentrations of control sera. Plasma based precision materials were prepared in-house and spiked to appropriate levels. Total precision was collected on two concentrations of control samples in 40 runs conducted over 20 days.