PHTY300 Lecture 3: PHTY 300 Wk 3 Lectures
Document Summary
Effects of intubation and ppv on the cardiorespiratory system. Discuss the issues and complications of intubation and mechanical ventilation on gas movement, secretion movement, respiratory muscle function and respiratory mechanics. On inspiration = increased load (for spontaneous breaths) Increased dead space issue for spontaneous breaths. Implications for physiotherapy: minimize the effects of secretions. Careful handling of et tube/head & neck movement. Positive pressure ventilation: pulmonary effects of ppv lung volumes, decreased compliance of the lungs. Decreased frc: decreased frc due to. This causes less air to the dependent regions: pulmonary effects of ppv distribution of ventilation, ventilation to non-dependant regions. Airway resistance is less in these regions: strategies peep: Decreased alveolar emptying thus increased alveola size / number (increased frc) This inceases the surface area especially in dependant / well perfused areas. May increase spontaneous vt / sigh which promotes stretch / surfactant production.
