Lecture 9 - Lung Volumes

Question 1

Identify the numbered portions

Answer 1

Question 2

Identify the numbered portions

Answer 2

Question 3

How do you calculate VC (vital capacity)

Answer 3

IRV (inspiratory reserve volume) + V_T (tidal volume) + ERV (expiratory reserve volume)

Question 4

How do you calculate vital capacity (VC)

Answer 4

ERV (expiratory reserve volume) + IC (inspiratory capacity)

Question 5

How do you calculate IC (inspiratory capacity)

Answer 5

IRV (inspiratory reserve volume) + V_T (tidal volume)

Question 6

How do you calculate TLC (total lung capacity)

Answer 6

1. VC (vital capacity) + RV (residual volume)
2. IC (inspiratory capacity) + FRC (functional residual capacity)

Question 7

How do you calculate FRC (fucntional residual capacity)

Answer 7

ERV (expiratory reserve volume) + RV (residual volume)

Question 8

During pregnancy what lung volume would likely not decrease

Answer 8

residual volume

Question 9

What is FEV_1

Answer 9

forced expiratory volume in one second; 80% is normal

Question 10

What are obstructive v. restrictive diseases

Answer 10

obstructive

• reduced airflow
• difficulty exhaling

restrictive

• reduced lung volume
• difficulty inhaling

Question 11

what are the symptoms of obstructive lung disease

Answer 11

FEV_1 reduced (80 is normal and Slocum said 70)

and

FEV1/FVC ratio decreased

Question 12

What are the symptoms of restrictive lung disease

Answer 12

both FEV_1 and FVC are reduced

but

FEV_1/FVC ratio is unchanged or elevated

Question 13

What is anatomic dead space?

Answer 13

conduction zone

Question 14

How can you calculate anatomical dead space

Answer 14

roughly equal to their weight

Question 15

How do you calculate physiological dead space

Answer 15

typically zero but there is a formula that sucks