Usefulness of measures of Svo2, Spo2, vital signs, and derived dual oximetry parameters as indicators of arterial blood gas variables during weaning of cardiac surgery patients from mechanical ventilation

Central venous saturation is a predictor of reintubation in difficult-to-wean patients*

“…Jubran et al (11) demonstrated that SvO 2 decreased in weaning failure patients, probably due to increased respiratory muscles O 2 ER. Noll and Byes (27) showed correlation of SvO 2 , vital signs, and arterial blood gases in 30 consecutive postoperative coronary artery bypass graft cases, but only SpO 2 and respiratory rate correlated with weaning failure. Cason et al (28), in ten postoperative coronary artery bypass graft patients, evaluated SvO 2 and SpO 2 during SBT and showed that weaning failure occurred when SvO 2 was Ͻ60%.…”

Cardiopulmonary Predicators of Dysfunctional Ventilator Weaning Response after Coronary Artery Bypass Graft

“…However, there was a significant difference between cases and controls in mean SPO 2 at fourth hour (p = 0.01), fifth hour (p = 0.01), and sixth hour (p = 0.05). This finding is consistent with the past literature which reported that differences in SPO 2 were associated with PMV (59,86). There was a significant decline in the controls noted after the fourth hour, which may be due to the weaning process and extubation in controls, whereas cases continued to receive ventilator support to maintain the oxygenation.…”

“…There is no standard time limit found in the literature for DVWR. Several researchers reported that the majority of the NVWR occurred at 4 to 8 hours after CABG surgery (51,53,54,59,66). Findings from some recent studies reveal that the rate of weaning failure is higher among early weaning trials, which may indicate an association between premature weaning trials and weaning failures (58,73,74).…”

How I Learned My ABCs: Action, Back to Basics, Collaboration, Discovery

“…were better indicators of oxygen and ventilation status during the weaning process than were SvO 2 and other oxygenation parameters. 12,13 The study was groundbreaking for nursing research at the facility. We received small grants to conduct the study and put forth the first-ever nursing study without a physician co-investigator through the hospital's institutional review board.…”