• Anesthesiology · Feb 2018

    Impact of a Novel Multiparameter Decision Support System on Intraoperative Processes of Care and Postoperative Outcomes.

    • Sachin Kheterpal, Amy Shanks, and Kevin K Tremper.
    • From the Department of Anesthesiology, University of Michigan Medical School, Ann Arbor, Michigan.
    • Anesthesiology. 2018 Feb 1; 128 (2): 272-282.

    BackgroundThe authors hypothesized that a multiparameter intraoperative decision support system with real-time visualizations may improve processes of care and outcomes.MethodsElectronic health record data were retrospectively compared over a 6-yr period across three groups: experimental cases, in which the decision support system was used for 75% or more of the case at sole discretion of the providers; parallel controls (system used 74% or less); and historical controls before system implementation. Inclusion criteria were adults under general anesthesia, advanced medical disease, case duration of 60 min or longer, and length of stay of two days or more. The process measures were avoidance of intraoperative hypotension, ventilator tidal volume greater than 10 ml/kg, and crystalloid administration (ml · kg · h). The secondary outcome measures were myocardial injury, acute kidney injury, mortality, length of hospital stay, and encounter charges.ResultsA total of 26,769 patients were evaluated: 7,954 experimental cases, 10,933 parallel controls, and 7,882 historical controls. Comparing experimental cases to parallel controls with propensity score adjustment, the data demonstrated the following medians, interquartile ranges, and effect sizes: hypotension 1 (0 to 5) versus 1 (0 to 5) min, P < 0.001, beta = -0.19; crystalloid administration 5.88 ml · kg · h (4.18 to 8.18) versus 6.17 (4.32 to 8.79), P < 0.001, beta = -0.03; tidal volume greater than 10 ml/kg 28% versus 37%, P < 0.001, adjusted odds ratio 0.65 (0.53 to 0.80); encounter charges $65,770 ($41,237 to $123,869) versus $69,373 ($42,101 to $132,817), P < 0.001, beta = -0.003. The secondary clinical outcome measures were not significantly affected.ConclusionsThe use of an intraoperative decision support system was associated with improved process measures, but not postoperative clinical outcomes.

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