Can routine perioperative haemodynamic parameters predict postoperative morbidity after major surgery?

Jean-Francois Bonnet; Eleanor Buggy; Barbara Cusack; Aislinn Sherwin; Tom Wall; Maria Fitzgibbon; Donal J Buggy

doi:10.1186/s13741-020-0139-6

Can routine perioperative haemodynamic parameters predict postoperative morbidity after major surgery?

Perioper Med (Lond). 2020 Mar 24:9:9. doi: 10.1186/s13741-020-0139-6. eCollection 2020.

Authors

Jean-Francois Bonnet^#¹, Eleanor Buggy^#¹, Barbara Cusack¹, Aislinn Sherwin¹, Tom Wall¹, Maria Fitzgibbon², Donal J Buggy¹

Affiliations

¹ 1Department of Anaesthesiology & Perioperative Medicine, Mater University Hospital, School of Medicine, University College Dublin, Dublin, Ireland.
² 2Department of Medical Biochemistry, Mater University Hospital, School of Medicine, University College Dublin, Dublin, Ireland.

^# Contributed equally.

Abstract

Background: Postoperative morbidity occurs in 10-15% of patients undergoing major noncardiac surgery. Predicting patients at higher risk of morbidity may help to optimize perioperative prevention. Preoperative haemodynamic parameters, systolic arterial pressure (SAP) < 100 mmHg, pulse pressure (PP) > 62 mmHg or < 53 mmHg, and heart rate (HR) > 87 min^-1 are associated with increased postoperative morbidity. We evaluated the correlation between these and other routine haemodynamic parameters, measured intraoperatively, with postoperative morbidity. Postoperative morbidity was measured using the Comprehensive Complication Index (CCI) and length of stay (LOS). Additionally we correlated CCI with the cardiac risk biomarker, preoperative NT-ProBNP.

Methods: This is a retrospective analysis of patients in MET-REPAIR, a European observational study correlating self-reported physical activity with postoperative morbidity. Patients' electronic anaesthetic records (EARs) including perioperative haemodynamic data were correlated with 30-day postoperative morbidity, CCI and LOS parameters. Statistical analysis to assess for correlation was by Kendall's Correlation Coefficient for tied ranks (Tau-B) or Spearman's Correlation Coefficient. Blood for N-terminal prohormone of brain natriuretic peptide (NT-proBNP) measurement was collected < 31 days before surgery.

Results: Data from n = 50 patients were analysed. When stratified according to age > 70 years and ASA > 3, the duration of MAP < 100 mmHg, < 75 mmHg or < 55 mmHg were associated with a higher CCI (tau = 0.57, p = 0.001) and duration < 75 mmHg was associated with prolonged LOS (tau = 0.39, p = 0.02). The intraoperative duration of PP > 62 mmHg was associated with LOS (tau = 0.317, p = 0.007). There was no correlation between preoperative NT-proBNP and either CCI or LOS.

Conclusions: In older and higher risk patients, duration of intraoperative hypotension by a variety of definitions, or PP > 62 mmHg, are associated with increased postoperative CCI and LOS. These findings warrant confirmation in larger databases with evaluation of whether real-time intraoperative intervention could reduce postoperative morbidity.

Keywords: Complications; Haemodynamic parameters; Hypotension; Intraoperative; Morbidity; NT-ProBNP; Predictor; Pulse pressure.