PSL301H1 Lecture Notes - Lecture 15: Obstructive Sleep Apnea, Vital Capacity, Pulmonary Fibrosis
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PSL301H1 Full Course Notes
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Document Summary
Infant respiratory distress syndrome (irds) aka neonatal respiratory distress syndrome: premature infants, due to insufficient surfactant production (surfactant is a polar molecule) and structural immaturity of lungs, bluish color of skin/mucus membranes, nasal flaring, apnea, grunting, etc. Stretch receptors in lungs sends sgnal to brainstem when they"re at maximum thoracic volume to stop signalling to the dp. Ventilation: volume air carried from the environment to the alveoli per unit of time. V = rate x volume (l/min), we breathe about 6 l/min. Expand lungs = increase volume = decrease pressure. Inter pleural pressure is lowest at maximum inspiration. Inter pleural pressure is highest after expiration. Spirometry: measure volume of air inspired and expired by the lungs - calculate breathes/minute. Before inspiration, palveolar = patm = no air movement. Inspiration = p alveolar = patm - 1mmhg; p intrapleural = -6 mmhg. Tidal volume = volume of air that goes in/out your lungs.
