PHTY300 Lecture Notes - Lecture 4: Pulmonary Hypertension, Spirometry, Hypercapnia
Document Summary
Phty300 week 4 vc: sleep and respiratory failure. No less important than diet and activity. Sleep loss associated with poorer health outcomes. Risk of cv disease: hypertension, chd stroke. Sleep disordered breathing: obstructive sleep apnoea, central sleep apnoea, nocturnal hypoventilation syndromes. Affects >9% of women and 24% of men<60 yrs. Prevalence increases with increased bmi, increased age, certain ethnic groups. Continuous airway pressure (cpap) increases pressure, providing a splinting pressure t maintain airway patency. A reduction in chest wall movt. and or airflow. Any disorder where the diaphragm is weak or at a mechanical disadvantage. Where the load on the respiratory system exceeds the capacity. Postural muscle hypotonia: upper airway resistance, dependence on the diaphragm. Breathlessness at rest or awakening at night. Acute (on chronic) respiratory failure following chest infection. High le(cid:448)el of clinical suspicion in patients (cid:449)ith (cid:862)at risk(cid:863) diagnoses. Respiratory muscle pressures: inspir and expir outh pressures: snip, peak cough flow.
