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Flashcards in LUNG COMPLIANCE Deck (22):
1

COMPLIANCE

- change in volume/ change in pressure
- proportional to change in volume
- is inverse to elasticity (recoil when stretched)
- EQUAL to the slope of the curve

2

lung of a 1 y/o has a

- greater elasticity (recoil) new lung
- elastin, alpha 1 antitrypsin

3

lung of a 60 y/o has a

- greater compliance

4

recoil

- surface tension force
- La Place law

5

emphysema

- deficiency in alpha 1 anti trypsin
- problem in the elastin fiber in the lung

6

surface tension force

- liquid air interface
- collapsing force

7

La place Law

- pressure is inverse to radius
- decrease radius increase pressure VIA
- air will move from high pressure to low pressure causing collapse small alveoli
- increasing surface tension
natural lung is in the state of collapse

8

2-3 weeks before birth

- type II pneumocytes synthesized surfactant
- DEFICIENCY respiratory distress syndrome
- dx L:S ratio

9

SURFACTANT

- surfactant decreases surface tension force
- surfactant increase compliance
- surfactant opposes La Place law
- surfactant decreases capillary filtration force

10

sigmoid graph

Left to right

11

to the LEFT

- increases the slope/compliance

12

to the RIGHT

- decreases the slope/compliance

13

normal aging

- losing elasticity
- compliance increase
- to the LEFT

14

emphysema

- lost in elasticity
- increase in compliance
- to the LEFT

15

RDS

- loss of surfactant
- increase in surface tension force
- loss compliance
- to the RIGHT

16

ATELECTASIS end stage of RDS

- curve more to the RIGHT
- end stage of collapse

17

airway resistance

flow is inverse to resistance is inverse to radius

18

parasympathetic nerve stimulation

- bronchoconstriction

19

cathecholamines

- bronchodilation

20

airway resistance decreases during

- inspiration
- increase flow

21

more negative the intracellular pressure

- the lower the resistance of the airways

22

short force burst blow

- emptying the conductive zone (dead space)
- (+) reflex narrowing of the bronchus, decreasing the radius of the airways (dynamic compression of the airways)
- the flow rate is independent of effort and dependent totally in radius
- longer time underwater