Derivation of Outcome-Based Pediatric Critical Values

Area of Science:

• Clinical Biochemistry
• Pediatric Laboratory Medicine

Background:

• Critical value reporting in pediatrics lacks a standardized, outcomes-based definition.
• This heterogeneity leads to inconsistent laboratory practices for pediatric critical values.

Purpose of the Study:

• To establish contemporary, outcomes-based critical value thresholds for pediatric serum analytes.
• To address the lack of standardized critical value reporting in pediatric laboratory medicine.

Main Methods:

• Utilized anonymized laboratory data for 10 biochemistry tests.
• Calculated the probability of intensive care unit admission for each laboratory concentration.
• Defined critical value thresholds using a polynomial function and the 90% probability trend line.

Main Results:

• Established critical value thresholds for sodium, potassium, bicarbonate, chloride, urea, creatinine, glucose, total calcium, magnesium, and phosphate.
• Provided specific numerical thresholds for each tested serum analyte.

Conclusions:

• Developed a novel approach for deriving pediatric critical value thresholds.
• This method provides a foundation for more consistent and clinically relevant critical value reporting in pediatrics.