الفهرس 
The physiology of respirationOnly 14 pages are availabe for public view
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Abstract
Acute respiratory failure (ARF) may be defined as inadequate oxygenation resulting in systemic arterial hypoxemia.or as inadequate ventilation resulting in systemic arterial hypercarbia(1). ARF most commonly result from impaired control of ventilation, intrinsic pulmonary disease and upper or lower airway obstruction.(l). Patients with ARF need ventilatory support with one or other mode of mechanical ventilation.Comparative data about hemodynamic, oxygen transport, ventilatory and lung mechanics parameters with PC, ACV, SIMV and PS modes are scanty and incomplete especially so in the pediatric population.The present work aimed to study these different parameters in various modes of mechanical ventilation in. children with ARF.The present study was carried out on 20 children, 12 boys and 8 girls aged 6 months to 5 years, with acute respiratory failure. In 18 cases ARF was caused by bronchopulmonary diseases, while in the other 2cases it was due to central nervous system causes. The study was carried out in the Chest Care Unit, Pediatric Department, Tanta University Hospital.