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The effects of different ventilator modes on cerebral tissue oxygen saturation in patients with bidirectional superior cavopulmonary connection.
Ann Card Anaesth ; 2014 Jan; 17(1): 10-15
Article in En | IMSEAR | ID: sea-149684
Aims and Objectives: We used near‑infrared spectroscopy to document changes in cerebral tissue oxygen saturation (SctO2) in response to ventilation mode alterations after bidirectional Glenn (BDG; superior cavopulmonary connection) procedure. We also determined whether spontaneous ventilation have a beneficial effect on hemodynamic status, lactate and SctO2 when compared with other ventilation modes. Materials and Methods: 20 consecutive patients undergoing BDG were included. We measured SctO2 during three ventilator modes (intermittent positive‑pressure ventilation [IPPV]; synchronized intermittent mandatory ventilation [SIMV]; and continuous positive airway pressure + pressure support ventilation [CPAP + PSV]). We, also, measured mean airway pressure (AWP), arterial blood gases, lactate and systolic arterial pressures (SAP). Results: There was no change in SctO2 in IPPV and SIMV modes; the SctO2 measured during CPAP + PSV and after extubation increased significantly (60.5 ± 11, 61 ± 10, 65 ± 10, 66 ± 11 respectively) (P < 0.05). The differences in the SAP measured during IPPV and SIMV modes was insignificant; the SAP increased significantly during CPAP + PSV mode and after extubation compared with IPPV and SIMV (109 ± 11, 110 ± 12, 95 ± 17, 99 ± 13 mmHg, respectively) (P < 0.05). Mean AWP did not change during IPPV and SIMV modes, mean AWP decreased significantly during CPAP + PSV mode (14 ± 4, 14 ± 3, 10 ± 1 mmHg, respectively) (P < 0.01). Conclusions: The SctO2 was higher during CPAP + PSV ventilation and after extubation compared to IPPV and SIMV modes of ventilation. The mean AWP was lower during CPAP + PSV ventilation compared to IPPV and SIMV modes of ventilation.
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Full text: 1 Index: IMSEAR Main subject: Oxygen / Oxygen Consumption / Respiration, Artificial / Vascular Surgical Procedures / Brain Chemistry / Female / Humans / Male / Cardiopulmonary Bypass / Ventilators, Mechanical Language: En Journal: Ann Card Anaesth Year: 2014 Type: Article
Full text: 1 Index: IMSEAR Main subject: Oxygen / Oxygen Consumption / Respiration, Artificial / Vascular Surgical Procedures / Brain Chemistry / Female / Humans / Male / Cardiopulmonary Bypass / Ventilators, Mechanical Language: En Journal: Ann Card Anaesth Year: 2014 Type: Article