Fig. 2.

Hemolysis index (HI) in specimens submitted for DBIL analysis. (A) The bar graph shows total number of specimens with HI values within the specified ranges. The annotation highlights which specimens exceed the manufacturer package insert limits for HI for the three DBIL assays analyzed in this report. (B) Bar graph shows same data as in (A) but broken down into whether specimens were drawn in outpatient clinic (including emergency treatment center and outpatient phlebotomy sites) or inpatient unit. (C) Bar graph shows HI data broken down into three broad age categories (<2 years old, 2–17 years old, and 18 years or older), with the percent of specimens within that age group having HI within the limits. Whereas the majority of specimens for the 2–17 years and 18 years or older groups have HI less than 20, a majority of the specimens for the less than 2 years old group have HI exceeding 30 (limit for the Roche DBIL assay). HI values correspond to an approximate serum hemoglobin concentration in mg/dL.