[Urinary alcohol content/blood alcohol content quotient with reference to bladder filling]

The blood alcohol concentration, the urinary alcohol content and the urinary volume were determined in 245 autopsy cases. Irrespective of the bladder filling, a large variation of the UAC/BAC ratios could be detected in BAC values of up to about 1 g/kg. The ratios were very much more stable at higher blood alcohol concentrations, but showed a certain dependence on the degree of bladder filling. With the increase of urinary volumes, the mean ratio rose. Provided that blood alcohol concentrations were in excess of 1 g/kg, the UAC/BAC ratio was 1.3 at a volume of less than 5 ml, about 1.4 at up to 100 ml, between 1.4 and 1.5 up to 200 ml and about 1.5 with a volume in excess of 200 ml. The differences can be explained by the real-life conditions with regard to drinking behavior and micturition. Accordingly, the urinary volume is also to be taken into consideration for practical purposes.