Patent ID: 7033838

Claim:
A method for the diagnosis of Helicobacter pylori infection comprising, on a patient with an empty stomach, the sequential steps of: a) removing a 1 st sample of 0.1 to 0.6 ml of capillary or venous blood from the patient; b) administering exactly 10 to 50 mg of 13 C-urea in aqueous solution having a pH of 2 to 4 to the patient; c) removing a 2 nd sample of capillary or venous blood from the patient 10 to 15 min after the administering step; d) determining the 13 C content of the blood samples in a single measurement of each blood sample by isotope ratio mass spectrometry (IRMS); e) diagnosing Heliobacter pylori infection when a greater 13 C content is measured in the 2 nd sample, compared to the 13 C content measured in the 1 st sample.