Labortary1-Pulmonary Function-Physiology II.docx

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York University
Kinesiology & Health Science
KINE 2011
Gillian Wu

Lab#1 Pulmonary Function (Human Physiology II) Labortary#1 Physiology II Notes Spirometery= refers to the measurement of lung volumes and lung capacities FORCED Total Lung Vital Capacity Inspiratory Expiratory Residual Vol Capacity (VC) Reserve Vol Reserve Vol (RV) (TLC) (IRV) (ERV) RV= VC*0.25 TLC= VC +RV VC=IRV+ERV+V T vol of air in the max vol of air that Max vol of air Max vol of air Vol of air lungs after can be exhaled that can be that can be remaining in maximal after forced forcefully forcefully the lungs (forced) inhalation inhaled after exhaled after aftera maximal inhalation. normal normal exhalation. inhalation. exhalation. UNFORCED Inspiratory Expiratory Tidal Vol (VT or Functional Residual Capacity (IC): Capacity (EC): Vt) Capacity (FRC) IC= VT + IRV EC=VT+ ERV VT FRC= ERV + RV max vol of air that max vol of air vol of air inspired Vol of air remaining in can be inhaled that can be or expired during lungs after a normal after normal exhaled after a each normal (unforced exhalation) (unforced) normal (unforced) exhalation. (unforced) ventilation cycle. exhalation. Eupnea or Eupenic breathing = unforced ventilation ; normal, quiet breathing; the amount of air inhaled and exhaled in this manner is called tidal volume (VT). Lab#1 Pulmonary Function (Human Physiology II) -Breathing can become difficult due to normal elasticity condition occurs in obstructive and restrictive pulmonary dieasess. -Laboured breathing is called dyspnea ( the person in this case relies on muscles not used in normal ventilation called scalene muscles, sternomastoids, and pectoralis major) -People use those above muscles accelerated respiration or exercise known as hyperpnea. - The amount of air exhaled in this process, excluding the normal tidal vol, is the expiratory reserve volume (ERV) - Even after a max forced exhalation, there is still some air left in the lungs, this is called residual volume(RV) which makes it easier to inflate the lungs during the next inhalation. Breathing frequency f = breath/min Tidal Vol = VT L/breath Forced Vital Capacity(FVC) = FVC -> L Forced Expiratory Volume in 1 sec (FEV ) -> 1 FEV /1FVC x 100 -> % Lab#1 Pulmonary Function (Human Physiology II) Chronic Pulmonary Diseases can be divided into two general categories: obstructive & restrictive Obstructive Restrictive Difficulty exhaling all the air from the Difficult in moving air into the lungs. lungs. Because of damage to the lungs or Restrictive lung disease most often results narrowing of the airways inside the lungs, from a condition causing stiffness in the exhaled air comes out more slowly than lungs themselves normal. due to chronic inhalation of foreign particles , accumulation in the lungs this
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