Flashcards in Ventilation and compliance 1 Deck (20):

1

## Tidal volume

### total volume of air breathed in and out of lungs in one breath

2

## Inspiratory residue volume

### Maximum volume of air which can be drawn into lungs at the end of normal inspiration

3

## Expiratory residue volume

### Maximum volume of air which can leave the lungs at the end of normal expiration

4

## Residual volume

### Volume of gas in the lungs after maximal expiration

5

## Vital capacity

### TV+ IRV +ERV

6

## Total lung capacity

### Vital capacity + Residual volume

7

## Inspiratory capacity

### Tidal volume + IRV

8

## Functional residual capacity

### ERV + Residual volume

9

## Alveolar capacity vs pulmonary capacity

###
Pulmonary ventilation= total air movement in and out of lungs

Alveolar ventilation= fresh air which reaches the alveoli and therefore can be used for gaseous exchange

10

## Partial pressure

###
Percentage of gas in a mixture multiplied by total pressure of mixture

11

## Pressure of atmosphere/02

###
760mmhg

160mmhg

12

## alveolar ventilation of 02 and CO2

###
normal ventilation

02= 100mmhg

C02= 40mmhg

Hypoventilation

02= 30MMHG

C02=100MMHG

hyperventilation

02=120mmgh

Co2=20mmhg

13

## Anatomical dead space

###
Volume of conducting airways.

Gas inspired is exhaled unchanged.

About 150ml

14

## Law of Laplace?

###
explains the difference in pressure between larger and smaller alveoli

P=2T/r

P is pressure

T is surface tension

r is radius

15

## Law of Laplace in different sized alveoli and how the production of surfactant helps this

###
In alveoli

P will be greater in alveoli with smaller radii due to the law of Laplace

Surfactant helps decrease surface tension in the alveoli

More surfactant produced in smaller alveoli as the cells are closer together

T decrease in smaller alveoli.

16

## Average volume in Tidal volume

### 500ml

17

## Average ERV

### 1200ml

18

## Average IRV

### 3000ml

19

## Average RV

### 1200ml

20