A [14C]Phenacetin Breath Test to Measure Hepatic Function in Man
Kerry J. Breen, Ross W. Bury, Ian V. Calder, Paul V. Desmond, Marion Peters, M. Laurie Mashford – 1 January 1984 – Phenacetin, a high‐clearance drug, was labeled as [14C‐ethyl]phenacetin and used in a breath test of hepatic function. 14CO2 appeared rapidly in breath such that more than 30% of the administered radioactivity was expired in 2 hr. For all means of expression used to describe the appearance of 14CO2 in breath, normal controls and hospitalized patients without liver disease were clearly separated from cirrhotic subjects with moderate and severe liver damage.