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Week 43 > Airflow & Obstruction > Flashcards

Flashcards in Airflow & Obstruction Deck (4)
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1

Airflow formula

  • Q=dP/R

2

Resistance:

  • primarily property of conducting airways
  • radius is the main determinant of resistance

3

Resistance Formula:

  • R=8nL/3.14r^4
  • radius
    • main determinant of resistance
    • same throughout a generation
    • radius increases, resistance decreases
  • Viscosity (n)
  • Length
    • doesn't change in adults

4

Extrathoracic airways

  • surrounded by tissue
  • 50% of system resistance 
  • all air through one tube=high velocity of airflow and turbulence