A - Absorption of sugars: A person is given sugar D Kylizoloz (D-xylose), a sugar absorbed from the small intestine and then calibrated after 2 hours in the blood or after 5 hours in the urine.
If we compare this substance in the blood or urine after a period of oral administration and we found that the amount of natural, this indicates the absorption of good, but if the amount is incomplete, this indicates the absorption of bad.
Disadvantages of this test: If there are some bacteria in the small intestine, these bacteria will digest the D-xylose so that there is no more D-xylose to absorb and detect in the blood or urine, so the test in such a situation gives us that there is malabsorption despite Of non-existence. This test is therefore outdated and practically unhelpful.
B - absorption of fat: are given 200 g (oz) fat a day and then calibrated fat in the feces complex within 3 days.
All of the above is not useful or practical and is no longer used because when we want to diagnose a specific disease we are looking for something specific to him, for example celiac disease has had certain blood tests without resorting to all of the above.
In practice: the time of the protrombin indicates absorption.
- In the case of malabsorption - lack of absorption of vitamin K - Prolong the time of protrombin.
When we suspect bad absorption, we ask for the caliber of the protrombin.
It is also possible to calibrate calcium, if we find it incomplete, this indicates poor absorption.
There is also the Chilly test (vitamin B12 absorption from the end of the ileum) where vitamin B12 is given radically and the test is positive if the vitamin is administered in the urine and not in the stool, but its use is rare.
If we compare this substance in the blood or urine after a period of oral administration and we found that the amount of natural, this indicates the absorption of good, but if the amount is incomplete, this indicates the absorption of bad.
Disadvantages of this test: If there are some bacteria in the small intestine, these bacteria will digest the D-xylose so that there is no more D-xylose to absorb and detect in the blood or urine, so the test in such a situation gives us that there is malabsorption despite Of non-existence. This test is therefore outdated and practically unhelpful.
B - absorption of fat: are given 200 g (oz) fat a day and then calibrated fat in the feces complex within 3 days.
All of the above is not useful or practical and is no longer used because when we want to diagnose a specific disease we are looking for something specific to him, for example celiac disease has had certain blood tests without resorting to all of the above.
In practice: the time of the protrombin indicates absorption.
- In the case of malabsorption - lack of absorption of vitamin K - Prolong the time of protrombin.
When we suspect bad absorption, we ask for the caliber of the protrombin.
It is also possible to calibrate calcium, if we find it incomplete, this indicates poor absorption.
There is also the Chilly test (vitamin B12 absorption from the end of the ileum) where vitamin B12 is given radically and the test is positive if the vitamin is administered in the urine and not in the stool, but its use is rare.