Impact of an electronic health record on follow-up time for markedly elevated serum potassium results

Follow-up of abnormal ambulatory laboratory results is often suboptimal. The impact of an ambulatory electronic health record (EHR) on follow-up of markedly elevated blood potassium (K ⁺) results was investigated via a retrospective medical record review-before and after EHR implementation-of patients at an adult primary care practice who had a nonhemolyzed K ⁺ ≥ 6.0 mEq/L. In all, 188 patients in the pre-EHR group and 30 in the EHR group satisfied inclusion criteria. The mean K ⁺ for the 2 groups was 6.3 mEq/L. The EHR group had 4.5 times the odds (95% confidence interval = 1.3-15.8) of having their episodes of hyperkalemia followed up within 4 days. Patients in the EHR group were also more likely to have their blood K+ rechecked within 4 days (63.3% vs 43.6% P = .044). An ambulatory EHR with a results management system improves documentation and time to follow-up for patients with markedly abnormal lab results.