![]() Meliones MD, MS, in Critical Heart Disease in Infants and Children (Third Edition), 2019 Negative Pressure Ventilation. NPV is not routinely used in patients with CHD however, it may be an effective technique in patients with passive pulmonary blood flow such as following Glenn shunt and Fontan procedures. The regulation of respiratory parameters during NPV, including inspiration/ expiration ratios, can be difficult. However, the disadvantage of NPV is that left ventricular afterload may be increased. The advantage of NPV is that intubation is avoided, sedation requirements may be decreased, and systemic venous return may be improved. Such cuirass devices avoid the limitations of body tank devices (iron lung type devices), which are rarely used today. Negative pressure is generated within this cuirass. 64,111,112 Currently, NPV is usually performed using a chest cuirass that covers the patient's chest and abdomen. Negative pressure ventilation (NPV) can be used in patients after surgery for CHD and in pediatric patients with respiratory dysfunction. Wetzel MBBS, MBA, in Critical Heart Disease in Infants and Children (Second Edition), 2006 Negative Pressure Ventilation
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