Validity of accuracy and trending ability of non-invasive continuous total hemoglobin measurement in complex spine surgery: a prospective cohort study.

摘要: Patients undergoing complex spine surgery present with multilevel spinal involvement, advanced age, and multiple comorbidities. Surgery is associated significant blood loss remarkable hemodynamic changes. The study aimed to investigate the accuracy trending ability of a non-invasive continuous method monitor hemoglobin (SpHb) concentrations using Radical-7™ Pulse CO-Oximeter in surgery. Forty-nine patients who underwent were enrolled this prospective observational study. Multiple time points established for data collection throughout operation. Simultaneous SpHb–total (tHb) paired recorded analyses. Linear regression analysis, Bland–Altman plot, four-quadrant Critchley polar plot used assess monitor. A total 272 pairs SpHb-tHb available divided into two groups based on perfusion index (PI): PI values ≥1.0 (n = 200) < 1.0 (n = 72). correction coefficients (r) between SpHb tHb 0.6946 0.6861 and < 1.0, respectively (P < 0000.1). In group, mean bias was − 0.21 g/dL percentage error (PE) 15.85%, whereas − 0.04 g/dL PE 17.42%. Four-quadrant revealed concordance rate 85.11%, showed 67.21%. demonstrates acceptable even low PI. However, limited unsatisfactory.