Respiratory Volumes

Question 1

Volume

Answer 1

The amount of air the lungs can hold

Question 2

Capacity

Answer 2

the combination of 1+ volumes

Question 3

Volumes and Capacities are measured how?

Answer 3

In milliliters (ml) or in cubic centimeters (cc). ml and cc mean the same thing

Question 4

How do volumes and capacities vary?

Answer 4

Will vary as a function of body size, gender, age, height, and the presence of disease/disorder, such as CP, PD, MD (muscular dystrophy)

These are all factors that will influence respiratory volume and capacity

Question 5

What are the 4 volumes?

Answer 5

Tidal Volume (TV)

Inspiratory Reserve Volume (IRV)

Expiratory Reserve Volume (ERV)

Residual Volume (RV)

Question 6

Tidal Volume (TV)

Answer 6

volume of air that is exchanged during one cycle of respiration

TV will vary as a function of BODY SIZE, AGE, + PHYSICAL EXERTION

Question 7

Quiet Tidal Volume

Answer 7

TV at rest

Averages about 525 ml for adults, or about 1/4 of a 2-liter soda bottle

You fill up about 3 of these bottles every minute

Question 8

Inspiratory Reserve Volume (IRV)

Answer 8

Volume of air that can be inhaled after 1 tidal inspiration

This is the amount of air you can inhale, above and beyond what you would normally inhale

IRV equals about 2475 cc, or 2 and 1/4 of a 2-liter soda bottle

Question 9

Expiratory Reserve Volume (ERV)

Answer 9

The volume of air that can be exhaled after passive, tidal expiration

This is also called Resting Lung Volume

ERV is the amount of air that can be forced out of your lungs after a normal exhalation

This amount is about 1000ml or about 1/2 of a 2-liter soda bottle

Question 10

Residual Volume (RV)

Answer 10

Amount of air that remains in the lungs after a maximum exhalation

You always have air in your lungs, even after exhalation

The air that remains is the RV

RV stays in your lungs so that they do not completely deflate

This amounts to about 1.1 liters of air

Question 11

Dead Air Space

Answer 11

Anatomic dead space

This is air that remains only within the respiratory tract itself - in the oral and pharyngeal cavities, and trachea

It is not found in the alveoli

It is like RV in that it can’t be exhaled

The amount of dead air space equals about 15 cc, in addition to the amount occupied by RV

Question 12

What does capacity refer to?

Answer 12

The combination of 1+ volumes

4 kinds:

1. Vital Capacity (VC)
2. Functional Residual Capacity (FRC)
3. Total Lung Capacity (TLC)
4. Inspiratory Capacity (IC)

Question 13

Vital Capacity (VC)

Answer 13

Total amount of air that can be inhaled after a maximum exhalation

Inspiratory + Expiratory Reserve Volumes + Tidal Volume

VC represents the capacity of air that is available for speech production

This capacity equals about 4,000 cc in an adult, or about 2, 2 liter soda bottles

Question 14

Functional Residual Capacity (FRC)

Answer 14

The volume of air that is in the body at the end of a passive exhalation

Expiratory Reserve + Residual Volumes

In an adult, FRC equals about 2100 cc, or slightly more than 2, 2-liter bottles of soda

Question 15

Total Lung Capacity (TLC)

Answer 15

The sum of all the volumes discussed so far, except for dead air space

Inspiratory Reserve Volume + Tidal Volume + Expiratory Reserve Volume + Residual Volume

TLC equals about 5100 cc or about 3, 2-liter bottles of soda

Question 16

Inspiratory Capacity (IC)

Answer 16

The maximum inspiratory volume that is possible after tidal expiration

Tidal volume + inspiratory volume

IC is the capacity of the lungs for inspiration only

This amount equals about 3,000 cc in adults, or about 2 1/2, 2-liter bottles of soda