DrSemmlow_Lecture

DrSemmlow_Lecture - Fowlers method for measuring the dead...

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Simulation of the Airway tree
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Flow = flow velocity * A Flow velocity = Const/A Flow velocity → 0 as A → ∞ Branching: Pharynx, Larynx, trachea, primary bronchi, secondary bronchi, …. ., bronchioles…., alveoli Atrachea ≈ ΣApri bronchi Σ Asec bronchi ≈….≈ 2.5 cm2
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Lung Volumes: spirometer
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Electrical Analog and “Lumped-parameter” Mechanical Analog model of the Lung mechanics
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Unformatted text preview: Fowlers method for measuring the dead zone. Subject initially inhales pure nitrogen, then exhales. No N2 in inspired air Dead space washout Dead zone, no N2 in expired air. Now plot N2 conc. against expired vol. Dead zone vol. Control: System Model of Respiratory Control involved in sleep apnea. Model Responses normal Normal Sleep apnea Model Responses: sleep apnea...
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This document was uploaded on 02/09/2012.

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DrSemmlow_Lecture - Fowlers method for measuring the dead...

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