Journal of cardiothoracic and vascular anesthesia
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J. Cardiothorac. Vasc. Anesth. · Apr 1998
Comparative StudyThe interaction between applied PEEP and auto-PEEP during one-lung ventilation.
To investigate the relationship between applied external positive end-expiratory pressure (PEEP) and auto-PEEP and the resultant total PEEP experienced by the patient during one-lung ventilation (OLV). ⋯ The change in end-expiratory pressure experienced by the ventilated lung during OLV when external PEEP is applied depends on the preexisting level of auto-PEER This may explain some of the inconsistencies in the clinical results of application of external PEEP during OLV. The total PEEP delivered to the patient should be measured whenever external PEEP is applied during OLV.
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J. Cardiothorac. Vasc. Anesth. · Apr 1998
Respiratory mechanics and gas exchange during one-lung ventilation for thoracic surgery: the effects of end-inspiratory pause in stable COPD patients.
To examine the effects of end-inspiratory pause (EIP) of different durations on pulmonary mechanics and gas exchange during one-lung ventilation (OLV) for thoracic surgery. ⋯ During the period of OLV in the lateral position of patients with preexisting pulmonary hyperinflation, the magnitude of PEEPi increased and oxygenation decreased significantly, whereas the efficacy of ventilation was not changed by the addition of an end-inspiratory pause to the ventilatory pattern. Because arterial oxygenation is affected by the presence of pulmonary hyperinflation, the method of ventilation should take into account the magnitude of preoperative pulmonary hyperinflation.
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J. Cardiothorac. Vasc. Anesth. · Apr 1998
Effects of inhaled nitric oxide on respiratory system mechanics, hemodynamics, and gas exchange after cardiac surgery.
To evaluate the hemodynamic and respiratory effects of inhaled nitric oxide (NO) in postoperative cardiac patients. ⋯ The effects of NO as a powerful and useful vasodilator agent were confirmed. However, it is important to be aware that the effects observed on respiratory mechanics may interfere with the final response of the respiratory system to NO.