To ensure that the output of a blood gas analyzer is both accurate and linear across the range of measured values, a calibration procedure must measure what?
a. Two different parameters at the same time
b. Parameters with known input values at one point
c. Two different parameters at different times
d. Parameters with known input values at two points
ANS: D
Calibration is performed to ensure that the output of the analyzer is both accurate and linear across the range of measured values. Parameters must be measured with known input values rep-resenting at least two points, usually a low and a high values.
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