Question 1

A spirographic record for a healthy adult male shows an inspiratory reserve volume (IRV) of 3100 mL and an inspiratory capacity (IC) of 4000 mL. What is the tidal volume (TV) for this individual?

Use the formula: 
$$ IC = TV + IRV $$

Accepted Answer

TV = 900 mL

Question 2

Which of the following best describes the inspiratory reserve volume (IRV)?

Accepted Answer

The maximum volume of air that can be inhaled after a normal tidal inspiration.

Question 3

If a patient has an inspiratory capacity (IC) of 3500 mL and a tidal volume (TV) of 500 mL, what is their inspiratory reserve volume (IRV)?

Use the formula: 
$$ IC = TV + IRV $$

Accepted Answer

IRV = 3000 mL

Question 4

A spirographic record is used to measure various lung volumes. Which of the following volumes cannot be measured directly by spirometry?

Accepted Answer

Residual volume (RV)

Question 5

A male patient has the following lung volumes: tidal volume (TV) = 500 mL, inspiratory reserve volume (IRV) = 3100 mL, and expiratory reserve volume (ERV) = 1200 mL. What is his vital capacity (VC)?

Use the formula: 
$$ VC = TV + IRV + ERV $$

Accepted Answer

VC = 4800 mL

Question 6

Which of the following best explains why inspiratory capacity (IC) is clinically important?

Accepted Answer

It reflects the maximum amount of air a person can inhale after a normal exhalation, which is useful for assessing pulmonary function.

Question 7

A patient’s inspiratory capacity (IC) is measured at 4000 mL, and their inspiratory reserve volume (IRV) is 3100 mL. If their tidal volume (TV) decreases to 400 mL due to restrictive lung disease, what is their new inspiratory capacity (IC)?

Use the formula: 
$$ IC = TV + IRV $$

Accepted Answer

IC = 3500 mL

Question 8

Which of the following scenarios would most likely result in a decreased inspiratory reserve volume (IRV)?

Accepted Answer

A patient with restrictive lung disease, such as pulmonary fibrosis

Question 9

If a male’s inspiratory capacity (IC) is 4000 mL and his tidal volume (TV) is 500 mL, what percentage of his inspiratory capacity is made up by the inspiratory reserve volume (IRV)?

Use the formula: 
$$ IRV = IC - TV $$ 
$$ 	ext{Percentage} = \frac{IRV}{IC} 	imes 100 $$

Accepted Answer

87.5%

Question 10

A spirographic record is being interpreted. Which of the following would be the best indicator of a patient’s ability to take a deep breath after a normal exhalation?

Accepted Answer

Inspiratory capacity (IC)

Question 11

A patient’s inspiratory reserve volume (IRV) is 2500 mL and their tidal volume (TV) is 600 mL. What is their inspiratory capacity (IC)?

Use the formula: 
$$ IC = TV + IRV $$

Accepted Answer

IC = 3100 mL

Question 12

Which of the following best describes the difference between inspiratory capacity (IC) and inspiratory reserve volume (IRV)?

Accepted Answer

IC includes both the tidal volume and the inspiratory reserve volume, while IRV is only the additional air that can be inhaled after a normal inspiration.

Question 13

A patient with a normal tidal volume (TV) but a reduced inspiratory reserve volume (IRV) is most likely experiencing which of the following?

Accepted Answer

A restrictive pulmonary disorder

Question 14

If a healthy male’s inspiratory capacity (IC) is 4000 mL and his inspiratory reserve volume (IRV) is 3100 mL, what is his tidal volume (TV)?

Use the formula: 
$$ TV = IC - IRV $$

Accepted Answer

TV = 900 mL

Question 15

Which of the following would NOT be a plausible cause for a decreased inspiratory capacity (IC)?

Accepted Answer

Increased lung compliance

Respiratory Volumes and Spirography: Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards