Assessing outcomes of intravenous insulin therapy in non-intensive care patients

The aim of this study was to compare outcomes of using intravenous insulin infusion (IVII) therapy for managing hyperglycemia in a non-intensive care unit (ICU) versus an ICU setting.

We conducted a retrospective analysis on patients who received IVII for hyperglycemia. The analysis compared variables associated with hypoglycemic events while on IVII, and point-of-care blood glucose control and insulin regimens at discharge. Insulin administration errors occurring on IVII were determined.

Between November 2020 and August 2022, 881 patients received 1,106 IVIIs (780 in ICU and 326 non-ICU). A cumulative 468 days were spent on IVII in the non-ICU setting and 1564 in the ICU (total 2,032 days). The frequency of hypoglycemia on IVII was higher when provided in the non-ICU vs ICU (1.4% vs 0.7%), p < 0.01). Non-ICU patients had significantly higher average blood glucose during the last 24 h of the hospital stay (185 mg/dL vs 160 mg/dL, non-ICU vs. ICU, Pp < 0.01) and were more likely discharged with basal-bolus insulin therapy (p < 0.01). After adjusting for other variables, the probability of having hypoglycemia (OR 2.35; 95% CI 1.62-3.42; p < 0.001) was higher for the non-ICU cohort. In addition, patients who received IVII in the non-ICU settings had mean glucose levels nearly 26 mg/dL higher (95% CI 19.40-32.9, p < 0.001) at discharge vs. ICU. Seven cases of insulin errors were reported while on IVII in the non-ICU settings, compared to one in the ICU.

A large number (468) of ICU days were avoided by providing IVII in the non-ICU setting. Of the more than 400 days of IVII therapy provided in the non-ICU, only 7 medication errors occurred. Further studies are needed to optimize IVII strategy for non-ICU patients.