Roche Diagnostics
52 Instructions for Use · Version 10.0
4 Theoretical foundation 9180 Electrolyte Analyzer
Reference and critical values
Critical ranges
Normal values depend, amongst other factors, on the patient, age, gender, lifestyle
habits (e.g. smoking), underlying disease (e.g. asthma), therapy (e.g. state after an
infusion). This especially applies to critical ranges, as these are based on the normal
values. Therefore, critical ranges can only be approximately defined and need special
attention if used for therapy decision. By default, critical values are not contained in
the default setting. Laboratories have to adjust the critical ranges to fulfill their own
requirements.
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