PHTY300 Lecture Notes - Lecture 2: Hypoventilation, Kyphoscoliosis, Artificial Heart
Document Summary
Pao2 < 60 mmhg and co2 normal or low. Paco2 > 45 mmhg and pao2 lower than normal. Types of respiratory failure: type 1 respiratory failure, hypoxemia, oxygen therapy intubation and mv, b level ventilation, high flow nasal prongs, cpap therapy, type 2 respiratory failure, hypercapnia, venilatory support invasive ventilation, non invasive ventilation. The difference between cpap and b level ventilation: cpap, the delivery of constant single level pressure during both inspiration and expiration, does not actively assist inspiration, provides a distending pressure, increased pressure within the airway or alveoli, physiologically. Reduces the work of breathing: primarily used for hypoxemia acaute cardiogenic pulmonary oedema or obstructive sleep apnea, risk of overinflation and increased alveolar deadspace, bilevel ventilation, provides two levels of airway pressure. Ipap and epap / pressure, support and cpap. Reduce the work of breathing relieve dyspnoea. To improve gas exchange ie decreased paco3 and correct acidosis: goals:
