Parenteral nutrition is a well-established technique for feeding patients with intestinal failure and other conditions which render enteral feeding impossible. Biochemical tests are required in the initial assessment of these patients, for monitoring their response to treatment and for the detection and management of complications. The use of these tests is discussed critically and guidelines are provided for the frequency with which they should be performed. Chemical pathologists and clinical biochemists have an important role in the provision of parenteral nutrition as members of multi-disciplinary nutrition teams.
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