Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/11

Click to flip

11 Cards in this Set

  • Front
  • Back
Ability of the lungs to perform depends on four general physiological functions
1)Diaphragm and thoracic muscles must be capable of expanding the thorax and lungs to produce a subatmospheric pressure
2)the airways must be unobstructed to allow gas to flow into the lungs and reach the alveoli
3)the cardiovascular system must circulate blood through the lungs
4)oxygen and carbon dioxide must be able to diffuse through the alveolar capillary membrane
Three categories of pulmonary functions testing
1)lung volumes and capcities
2)flow rates
3)the ability of the lungs to diffuse gases
Devices that measure gas volume
1)water sealed spirometers
2)below spirometers
3)dry rolling seal spirometers
Devices that measure gas flow
1)Pneumotachomters
2)turbinometers
3)sonic devices
4)Peak flow meters
Lung volumes
1)Tidal volume
2)IRV
3)ERV
4)RV
Four lung capacities
1)TLC
2)IC
3)FRC
4)VC
Those lung volumes that can be measured directly
1)IC
2)IRV
3)ERV
4)VC
Those lung volumes that need to be measured indirectly
1)RV
2)FRC
3)TLC
VT
Measure the volume exhaled during one minute, and divide by the frequency
Three methods to measure indirectly TLC and RV
1)Helium dilution
2)nitrogen washout
3)body pleysmography
Helium dilution technique
1)uses a closed, nonrebeathing circuit
2)Patient breathes until an equilibrium of gas is established between the spirometer and the lungs