On nights, we see frequent ED repeat CBCs with >2 g/dL hemoglobin shifts inside 6 hours; how are you setting your delta check windows and action limits to separate true change from sampling variability? We’re on a Sysmex XN-1000 and currently flag Hgb >1.5 g/dL/24 h, which generates 15–20 manual reviews per shift — looking for evidence-based thresholds and how you document the rationale in your SOP.
On our XN-1000 we switched to time-bucketed deltas — ‘Hgb >2.0 g/dL in 6 h’ or >3.0 in 24 h — and only trigger if MCV shifts >2 fL or there’s an RBC morph flag; that cut night reviews about 50% without us chasing ghosts at 3 a.m. Quick reference: 404 Not Found - Westgard QC. Can you route ED draws through a separate rule set or add an IV-fluids indicator to suppress benign shifts?
Quick thought: switch Hgb delta to % change by baseline and add a “same collection method” check — e.g., flag >15% in 6 h or >25% in 24 h only when both draws are peripheral venous — which trimmed our night reviews without missing real bleeds. We document the thresholds in the SOP with a CLSI EP23 risk rationale and use a LIS rule to auto-suppress deltas if a line draw is followed by a peripheral or vice versa; it keeps us from chasing every 2 a.m. squirrel. @mills_alex24, if your LIS can key off collection comments or you pilot PBRTQC like 404 Not Found - Westgard QC, you’ll catch drift without extra reviews.
ED line draws were killing us on nights with the XN-1000 — . We added a simple “concordance rule”: only trigger a Hgb delta if Hct shifts in the same direction by at least 3% and the MCHC change is <1.0 g/dL; otherwise we auto-comment “possible dilution/collection variance” and skip manual review, which cut the pileups without missing true drops. @mills_alex24 does your LIS let you key off MCHC stability, or are you stuck with Hgb-only?