Perfusion
Perfusion refers to the flow of ____ to the lungs
Blood
Ventilation refers to the amount of ___ entering and exiting the lungs with each respiratory cycle
Air
What is the ideal ventilation perfusion ratio?
Approximately 0.8-1.0
Name for the air that moves into lungs with each quiet inspiraton.
Tidal Volume
How many zones of perfusion exist in the lungs?
Three
The ___ of the lung is the largest contributor of alveolar dead space
Apex of the lung
Approximately what would the V/Q ratio be at the apex of the lung?
3
What is the typical volume amount for tidal volume
500 mL
What causes uneven blood flow of the lungs in an upright position?
Gravity
What is the name of the total volume of gas entering and exiting the lungs per minute
Minute ventilation
A V/Q ratio of 0.6 would be indicative of wasted ____
Perfusion
What is the name for the maximum volume of gas that can be expired after a maximal inspiration
Vital Capacity
Perfusion is greatest in which area of the lung?
Base
What is the minute ventilation with a tidal volume of 500mL, respiratory rate of 12, and physiologic dead space of 200mL?
6000
What conditions would cause a V/Q ratio equal to infinity?
Blood flow obstruction
What is inspiratory capacity given a insipratory reserve volume of 200 and tidal volume of 500.
IRV + Vt = IC, 700
What would be the expected perfusion amount during a pulmonary embolsim?
Zero
Alveolar ventilation is calculated by (VT-__) x RR
Dead Space or Vd
When there is a V/Q of zero, why does PaO2 not improve with 100% O2?
Airway obstruction
Calculate Vital Capacity with the given:
Inspiratory Capacity: 700
Total Lung Capacity: 1200
Residual volume: 200