High-Frequency Ventilation A Review
1986; Wiley; Volume: 15; Issue: 5 Linguagem: Inglês
10.1111/j.1532-950x.1986.tb00252.x
ISSN1532-950X
Autores Tópico(s)Cardiac Arrest and Resuscitation
ResumoHigh‐frequency ventilation (HFV) is a form of artificial ventilation that uses higher rates and smaller tidal volumes than those used with conventional mechanical ventilation (intermittent positive pressure ventilation [1PPV]). HFV is divided into three categories based on the rate and type of equipment used: 1) high‐frequency positive pressure ventilation administered through a system with low internal compliance having an expiratory valve to maintain positive airway pressure during expiration and rates of 60 to 120/minute; 2) high‐frequency jet ventilation delivered through an open system or a system with an expiratory valve at rates of 120 to 400/minute; and 3) high‐frequency oscillation using open systems and rates of 400 to 2400/minute. All forms of HFV provide adequate ventilation in normal animals at lower peak and mean airway pressures, resulting in less cardiovascular depression than that associated with 1PPV. HFV provides adequate ventilation with less cardiovascular depression and risk of barotrauma than 1PPV in the presence of pulmonary disease. The exact mechanism of gas exchange during HFV is not clearly understood, but enhanced diffusion as a result of turbulent gas flow appears to be a major factor.
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