What is the purpose of performing a single-point calibration between each blood gas sample?

Performing a single-point calibration between each blood gas sample is essential for correcting electrode and instrument drift. During the operation of any analytical instrument, drift can occur due to various factors such as temperature changes, wear and tear of the electrodes, or other environmental influences. By conducting a calibration check regularly, operators ensure that the measurements obtained are accurate and reliable.

This process involves using a known reference sample to compare against the instrument’s readings. If there is any deviation, adjustments can be made to the instrument's settings or calculations to account for these discrepancies. This is crucial for blood gas analysis, where even minor inaccuracies can significantly impact patient diagnosis and treatment. Ensuring the accuracy of electrode measurements is vital for patient safety and effective clinical decision-making.