Overnight salivary caffeine clearance: A liver function test suitable for routine use
Gerhard Jost, Axel Wahlländer, Ursula Von Mandach, Rudolf Preisig – 1 March 1987 – The feasibility of measuring caffeine clearance from saliva (SCI) was assessed in ambulatory patients with liver disease and in a control group, and the results were compared with quantitative liver function tests. For this purpose, the subjects were given 280 mg caffeine p.o. in decaffeinated coffee powder between noon and 4 p.m., and caffeine concentrations were measured in saliva (using an enzyme immunoassay) before bedtime and upon arising. In the cirrhotics (n = 29), SCI was 0.58 ± S.D.