SI units in clinical pathology.

By now, most doctors in Australia will have had some experience with the new SI units which are being used for pathology test results, especially chemical pathology. While the usage of SI units has spread rapidly through public hospitals in Australia, spread in the non-hospital sector has been slower. However, the change will occur, and so the following is presented to assist general practitioners to understand the reasons for the change, and to interpret results expressed in the new system.