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  • Title: Jugular bulb venous oxygen saturation during one-lung ventilation under sevoflurane- or propofol-based anesthesia for lung surgery.
    Author: Iwata M, Inoue S, Kawaguchi M, Takahama M, Tojo T, Taniguchi S, Furuya H.
    Journal: J Cardiothorac Vasc Anesth; 2008 Feb; 22(1):71-6. PubMed ID: 18249334.
    Abstract:
    OBJECTIVE: During one-lung ventilation (OLV), systemic oxygenation can be compromised. In such a scenario, if anesthetic techniques were used that adversely affected cerebral oxygen balance, the risk for impaired cerebral oxygen balance may be increased. In this study, jugular bulb venous oxygen saturation (SjO(2)) during OLV under sevoflurane- or propofol-based anesthesia for lung surgery was investigated. DESIGN: Prospective clinical study. SETTING: University hospital. PARTICIPANTS: Fifty-two adult patients scheduled for elective thoracic procedures in the lateral position. INTERVENTIONS: Patients were randomly allocated to either the sevoflurane or propofol group (n = 26). General anesthesia was maintained with sevoflurane or propofol combined with epidural anesthesia. MEASUREMENTS AND MAIN RESULTS: Arterial and jugular bulb blood samples were measured before OLV, 15 minutes after OLV, 30 minutes after OLV, and 15 minutes after the termination of OLV. SjO(2) values in both sevoflurane and propofol groups significantly declined during OLV (p < 0.05). SjO(2) values in the sevoflurane group were higher than in the propofol group, although SaO(2) values were similar (p < 0.05). Regarding the incidence of SjO(2) <50% (cerebral oxygen desaturation), there were significant differences between the sevoflurane group and the propofol group during both normally ventilated conditions (0% v 7.7%, p < 0.05, relative risk [RR]: not applicable) and OLV (1.9% v 26.9%, p < 0.05, RR = 14; 95% confidence interval [CI] 1.91-103). Significant increase in the incidence of SjO(2) <50% during OLV was also observed only in the propofol group (from 7.7% to 26.9%, p < 0.05, RR = 3.5; 95% CI 1.29-12.4). CONCLUSION: Cerebral oxygen desaturation was more frequently detected during OLV under propofol- versus sevoflurane-based anesthesia. Cerebral oxygen balance during OLV for lung surgery was less impaired under sevoflurane-based anesthesia compared with propofol; however, the clinical outcome or implications for cognitive function need to be determined.
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