[Application of the hydrogen breath test for the evaluation of oro-caecal transit time].

Physiological background and performance of the hydrogen breath test are described. Clinical and research applications of the hydrogen breath test for evaluation of the transport function of the small bowel are pointed out. Several factors affecting the oro-caecal transit time, such as: physiological (age, sex, menstrual cycle), usage of stimulants (coffee, alcohol, cigarette smoking), as well as pathological conditions, are discussed. An in-depth review of drug effects on the oro-caecal transit time is provided.