not be possible when the value for TOTAL PSA is in the low normal range. These guidelines are for assays performed using the Roche E170 immunoassay system.(02/2012;v5) TESTOSTERONE, TOT.,S. 296.0 193.0-740.0 ng/dL 112.3 LO 10/27/2015 TESTOSTERONE, BIOAVAIL. 183.8 72.0-460.0 ng/dL 74.6 10/27/2015 SEX HO