LUNG COMPLIANCE Flashcards
1
Q
COMPLIANCE
A
- 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
Q
lung of a 1 y/o has a
A
- greater elasticity (recoil) new lung
- elastin, alpha 1 antitrypsin
3
Q
lung of a 60 y/o has a
A
- greater compliance
4
Q
recoil
A
- surface tension force
- La Place law
5
Q
emphysema
A
- deficiency in alpha 1 anti trypsin
- problem in the elastin fiber in the lung
6
Q
surface tension force
A
- liquid air interface
- collapsing force
7
Q
La place Law
A
- 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
Q
2-3 weeks before birth
A
- type II pneumocytes synthesized surfactant
- DEFICIENCY respiratory distress syndrome
- dx L:S ratio
9
Q
SURFACTANT
A
- surfactant decreases surface tension force
- surfactant increase compliance
- surfactant opposes La Place law
- surfactant decreases capillary filtration force
10
Q
sigmoid graph
A
Left to right
11
Q
to the LEFT
A
- increases the slope/compliance
12
Q
to the RIGHT
A
- decreases the slope/compliance
13
Q
normal aging
A
- losing elasticity
- compliance increase
- to the LEFT
14
Q
emphysema
A
- lost in elasticity
- increase in compliance
- to the LEFT
15
Q
RDS
A
- loss of surfactant
- increase in surface tension force
- loss compliance
- to the RIGHT
