Urea-creatinine quotient
The urea–creatinine quotient is the quotient of the blood serum-urea concentration and the blood serum-creatinine concentration and should be in the range between 20 and 35. Creatinine is a breakdown product of the muscles and is also excreted via the kidneys. Since creatinine is produced very regularly and evenly and is excreted almost exclusively via the kidneys, it is very suitable for determining kidney filtration function and is an indicator of good kidney function.
Urea breath test
The urea breath test or 13C-breath test is a method for the detection of the bacterial species Helicobacter pylori in the stomach. These bacteria produce the enzyme “urease”, which splits urea into carbon dioxide and ammonia. In the test, the patient is given urea, which contains “marked” carbon atoms (C atoms).
If the patient is colonized with the bacteria, a “labeled” carbon dioxide gas would thus be produced. This gas would be breathed out by the patient and can be measured in a device and its quantity determined.
