Health and Medicine

Mechanical Ventilation Mechanical ventilation is a device that breathes for someone who is unable to breathe for themselves. Mechanical ventilation is also called positive pressure ventilation. Following an inspiratory trigger , a predetermined mixture of oxygen is forced into the central airways and then flows into the alveoli.  Mechanical ventilators are set to deliver a constant volume , a constant pressure or a combination of both with each breath. Modes of ventilation that maintain a minimum respiratory rates regardless of whether or not the patient initiates a spontaneous breath are referred to as assist control. Because pressures and volumes are directly linked by the pressure volume curve, any given volume will correspond to a specific pressure, and vice versa, regardless of whether the ventilator is pressure or volume cycled. Why is it needed ?  Brain and spinal cord injury or disease :  An injury or disease to the brain can interfere with the signs that control ...