[Changes in hemodynamics during intermittent high-frequency ventilation of the lungs in patients with acute respiratory insufficiency].

Hemodynamic changes have been studied in 19 patients (30 observations) with acute respiratory failure of various genesis during transition from conventional controlled lung ventilation, performed using PO-6 and Phase-3C devices, to intermittent high-frequency jet ventilation ("Spiron 601"). Impedance plethysmography and rheopulmonography have been used. It has been established that intermittent high-frequency jet ventilation during 1 hour can have both positive and negative effect on systemic and pulmonary hemodynamics in patients with lung damage. It has been demonstrated that the type of reaction depends on the initial values of stroke volume and cardiac output.