Difficulties in establishing reference intervals for special fluids: the example of 5-hydroxyindoleacetic acid and homovanillic acid in cerebrospinal fluid.

Abstract:

:Biochemical measurements in "special fluids" are complicated with the problem of reference intervals. Reference intervals are difficult to establish for these types of samples since they are usually only collected in patients with clinical suspicion of disease. Determination of neurotransmitter metabolites in cerebrospinal fluid illustrates this difficulty. This paper will review the factors and circumstances that have been identified or are suspected to modify the concentration of 5-hydroxyindoleacetic acid (5-HIAA) and homovanillic acid (HVA) in cerebrospinal fluid. In addition to obvious parameters such as age-related variation that can affect the concentration of 5-HIAA and HVA in cerebrospinal fluid, a variety of other factors can explain the wide range of "control" group sizes reported in the literature. Reference intervals must take into account the purpose of cerebrospinal fluid examinations, whether they be prospective studies to explore physio-pathologic relationships or for diagnostic purposes. In the latter case, certain neurological disorders cannot be excluded if a single measured value is within the reference interval.

journal_name

Clin Chem Lab Med

authors

Dhondt JL

doi

10.1515/CCLM.2004.137

keywords:

subject

Has Abstract

pub_date

2004-01-01 00:00:00

pages

833-41

issue

7

eissn

1434-6621

issn

1437-4331

journal_volume

42

pub_type

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