EHS 350 Lecture Notes - Lecture 16: Lung Volumes, Intrinsic Viscosity, Pleurisy
19 Jun 2017
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Terms expansion and contraction of rib cage certain amount of work to overcome intrinsic viscosity of lung surface tension airway resistance (air friction along pathway) 5 to 10% daily expenditure is breathing goes up to 30% in people w/ asthma and emphysema pneumothorax. When lung collapses as result of allowing air in pleural cavity happens when pleural cavity is punctured hemothorax. When blood allowed to get into negative cavity atelectasis collapsed/ partially collapsed lung pnea breath or breathing eupnea normal breathing apnea no breathing dyspnea difficult breathing ex. asthma hyperpnea rapid breathing pleurisy inflammation of pleura. Minimal - 500 ml, air left after pneumothorax. 1) less space for air and vital capacity decreases. **** part of respiratory pathway in which gas exchange does not take place (conducting zone) two kinds: anatomical dead space (ads) space in respiratory tract physiological dead space (pds)/ total dead space (tds) Ads + volume of any non- functioning alveoli ( = tds )
