[Drinking trials for back calculation in long elapsed time intervals]

By evaluating 100 drinking experiments the formula put forward by Zink and Reinhardt for calculating the BAC at the time of the incident (maximum BAC = BAC at the time of blood sampling + 0.2/1000 per hour + 0.2/1000 added value for the first hour) was tested for its validity in cases when long time spans have to be taken into consideration. This evaluation showed that in cases of high BACs the elimination rate of ethanol during 8 or 9 was even higher than expected when the formula was applied. Even when increasing the additional value for the first hour to 0.3/1000, the calculated maximum BAC did not match the actual BAC measured in all cases.