LAB 8 ALT: JUST WHAT SHE WROTE ON BOARD

Question 1

*** TV stands for… ***

Answer 1

Tidal Volume

Question 2

*** ERV stands for… ***

Answer 2

Expiratory Reserve Volume

Question 3

*** VC stands for… ***

Answer 3

Vital Capacity

Question 4

*** Define TV ***

Answer 4

• The amound of air that moves into or out of the lungs in quiet respiration
• about 500mL

Question 5

*** Define ERV ***

Answer 5

The additional amount of air that can be exhaled after quiet expiration.

Question 6

*** Define VC ***

Answer 6

The amount of air in the lungs that can be exhaled after a maximal forced inspiration.

Question 7

*** What is the Formula for Vital Capacity and how is it measured? ***

Answer 7

• VC = TV + IRV + ERV
• Measurement is the difference between forced inhalation and forced exhalation

Question 8

*** How is Expiratory Reserve Volume measured? ***

Answer 8

Measurement is the difference between quiet exhalation & forced exhalation.

Question 9

*** What is the formula to figure out TV when spirometer that is not sensitve enough to take a direct TV reading?

How is this performed ***

Answer 9

• (TV+ERV)-ERV=TV
• Step 1: Take a quiet breath inhale, and at the peak of inhale, perform a forced exhale. Take reading for TV+ERV
• Step 2: Take a quiet breath inhale and at the end of a quiet breathing exhale, perform a forced exhale. Take reading for ERV.
• Subtract reading 2 from reading 1 for TV