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Protocol

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

The patient should be fasted overnight and should empty their bladder before the test.

At t=0:

  • give 5 g xylose orally, dissolved in water
  • collect all urine for the next 5 hr
  • patient should drink 500 ml of water over the next 2 hr

At t=1 hr:

  • draw blood and determine concentration of xylose

At t=5 hr:

  • finish urine collection
  • analyse urine for xylose

Normal results are:

  • serum xylose concentration at 1 hr in excess of 1.3 mM
  • urinary xylose excretion in excess of 7.0 mmol/5 hr

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