Experience of Using High-Frequency Lung Ventilation during Cardiopulmonary Bypass in Cardiac Surgery

Abstract

The incidence of various postoperative complications including pulmonary ones is at a high level in a cardiac surgery. The objective: to evaluate the effectiveness of hig h-f requency lung ventilation during cardiopulmonary bypass as a preventive measure for postoperative pulmonary complications compared to lo w-v olume lung ventilation. Subjects and Methods. 60 patients undergoing cradiac surgery were included in the study. In HF Group ( HF ventilation with airway pressure control at the frequency of 30 0/m in, the ratio of duration of inhalation and exhalation is 1:2, mean airway pressure is 8 mbar) and VC Group (lung ventilation during CPB with parameters: tidal volume is 3 m l/k g, respiratory rate is 6/m in, and positive en d-e xpiratory pressure is +5 cm H 2 O). Results. No significant difference in the analysis of the oxygenation index were observed between groups. Frequency of pulmonary atelectasis on chest radiology in postoperative period made 3 (9%) in VC Group and 4 (12%) HF Group ( p = 0.71). The frequency of intraoperative recruiting lung maneuvers was 5 (16%) in VС Group and 6 in HF Group (18%) ( p = 0,75). The duration of postoperative ventilation did not differ between the groups. Conclusion. HF mechanical ventilation during CPB has no significant advantage over lo w-v olume mechanical ventilation. HF mechanical ventilation and lo w-v olume mechanical ventilation has the same protective effect on the oxygenating function of the lungs after CPB .