Correct and spurious calibration of the Oxicom oximeter.

Catheterization and cardiovascular diagnosis

PubMedID: 7874723

Russell EL. Correct and spurious calibration of the Oxicom oximeter. Cathet Cardiovasc Diagn. 1994;33(3):264-6.
Oxicom oximeters are widely used in cardiac catheterization laboratories. To calibrate the Oxicom oximeter, samples of oxygenated and deoxygenated whole blood are first analyzed on a CO-Oximeter, and then the Oxicom is adjusted to agree with the CO-Oximeter's readings. Subsequently, the Oxicom's calibration is confirmed at frequent intervals by taking readings from a white plastic stick that is inserted into the instrument to simulate a blood sample. The data in this report demonstrate that the readings from the white plastic "test simulator" failed to detect an out-of-calibration condition. By contrast, when the Oxicom was carefully adjusted to agree with a CO-Oximeter's readings on arterial and venous blood, a linear calibration curve resulted, and the Oxicom achieved its specified accuracy (2. 5%). The precautions necessary to calibrate the Oxicom correctly are enumerated in the text.