Effective today, the University of Iowa Hospitals and Clinics (UIHC) core laboratory will change reference ranges for plasma ammonia.  This will introduce gender-specific reference ranges for this test.

Test	Epic #	Previous range	New Range
AMMONIA, PLASMA	LAB47	7-42 μmol/L	11-51 μmol/L (males) 16-60 μmol/L (females)

Questions should be directed to Matthew Krasowski, MD, PhD, medical director of the Clinical Chemistry laboratory (384-9380, matthew-krasowski@uiowa.edu).