Expected Values

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Note! Good laboratory practice recommends that each laboratory establishes its own expected range of values.
 
A study with 126 apparently healthy children and adults (61 males and 65 females) without evidence of mast cell stimulation was performed. The age range was 12-59 for males and 13-61 for females* (Fig. 1)
 
The following results was obtained:
  • Geometric mean 3.8 µg/l
  • 95 upper percentile 11.4 µg/l


Fig. 1

Interpretation of Results
Normal values studied in healthy adults and children show a geometric mean of 3.8 µg/l and a 95th percentile of 11.4 µg/l*.  Values over 11.4 µg/l should be considered elevated for both children (> 4 years) and adults.

All studies were performed by Phadia AB. Internal basic product documentation.

References:

    1. Schwartz LB, Bradford TR, Rouse C, Irani A- M, Van der Zwan JK, Van der Linden P-W G. Development of a new, more sensitive immunoassay for human tryptase: use in systematic anaphylaxis. J Allergy Clin Immunol 1994;14(3):190-204.