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

If a patient’s inspiratory capacity (IC) is measured at 4000 mL and their tidal volume (TV) is 500 mL, what is their inspiratory reserve volume (IRV)?

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

Accepted Answer

IRV = 3500 mL

Question 3

A spirographic record is used to assess lung function. 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 4

A male patient has a measured inspiratory reserve volume (IRV) of 3100 mL. If his tidal volume (TV) is 500 mL, what is his inspiratory capacity (IC)?

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

Accepted Answer

IC = 3600 mL

Question 5

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 6

A spirographic record shows the following values for a male: inspiratory capacity (IC) = 4000 mL, inspiratory reserve volume (IRV) = 3100 mL. If the patient’s tidal volume (TV) increases to 700 mL due to exercise, what is the new inspiratory capacity (IC)?

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

Accepted Answer

Question 7

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 in assessing pulmonary function.

Question 8

A patient’s inspiratory capacity (IC) is 4000 mL, and their inspiratory reserve volume (IRV) is 3100 mL. If the patient’s tidal volume (TV) decreases to 300 mL due to shallow breathing, what is the new inspiratory capacity (IC)?

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

Accepted Answer

IC = 3400 mL

Question 9

Which of the following statements about spirographic records is correct?

Accepted Answer

They provide quantitative measurements of lung volumes such as tidal volume and inspiratory reserve volume.

Question 10

A healthy male has a tidal volume (TV) of 500 mL and an inspiratory reserve volume (IRV) of 3100 mL. If his inspiratory capacity (IC) is measured at 4000 mL, what would be the effect on IC if his tidal volume increases to 700 mL, assuming IRV remains constant?

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

Accepted Answer

Question 11

Which of the following best describes the relationship between inspiratory capacity (IC), tidal volume (TV), and inspiratory reserve volume (IRV)?

Accepted Answer

$$ IC = TV + IRV $$

Question 12

A patient’s spirographic record shows a decrease in inspiratory capacity (IC) over time. Which of the following conditions could most likely explain this finding?

Accepted Answer

Progressive restrictive lung disease reducing lung compliance.

Question 13

If a patient’s inspiratory reserve volume (IRV) is 3100 mL and their inspiratory capacity (IC) is 4000 mL, what percentage of the IC does the IRV represent?

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

Accepted Answer

77.5%

Question 14

A patient with a normal inspiratory reserve volume (IRV) suddenly experiences a decrease in tidal volume (TV) due to shallow breathing. What is the most likely effect on their inspiratory capacity (IC)?

Accepted Answer

IC will decrease.

Question 15

Which of the following best describes the clinical significance of measuring inspiratory reserve volume (IRV) in a patient with suspected pulmonary disease?

Accepted Answer

It helps assess the patient’s ability to increase ventilation during physical activity.

Respiratory Volumes and Spirography: Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards