Lec 3 - 5 - Pulmonary Mechanics Flashcards Preview

Dental Physiology > Lec 3 - 5 - Pulmonary Mechanics > Flashcards

Flashcards in Lec 3 - 5 - Pulmonary Mechanics Deck (21):
1

PL is the blank

distending pressure

2

Pel is the blank

pressure collapsing the lung

3

Pel and blank are equal and opposite pressures

Pcw pressure of the chest wall

4

pneumothorax causes blank due to increased pressure from air getting inside chest wall

lung collapse

5

lung compliance formula

delta v / delta p

6

low compliance leads to decreased blank

vital capacity

7

high levels of compliance leads to blank vital capacity such as emphysema

increased

8

ability of the lung to recoil to resting volume

elastance

9

increased volume in the lung blank compliance

decreases

10

surfactant is mostly made of blank

phospholipids

11

surfactant function by the law of laplace ... formula

P = 2T/r

T = surface tension
r = radius

12

without surfactant, the lung volumes would require a greater blank pressure to keep the lung expanded

transmural

13

fibrosis results in blank recoil

increased

14

emphysema results in blank recoil

decreased

15

airway resistance poiseuille's law formula

R = Ln / r^4

L = length
n = viscosity
r = radius

16

upper airway resistance is in blank

series r = r+r+r...

17

lower airways resistance is blank

parallel = r = 1/r + 1/r....

18

laminar flow in small airways is blank unlike upper large airways

silent

19

reynolds number formula which predicts the type of flow that predominates (laminar vs turbulent)

Re = 2rvd / n

r= radius
v = velocity of airflow
d = air density
n = air viscosity

20

reynolds number greater than 2000 is blank but less than is blank

turbulent flow, laminar flow

21

flow limitation / equal pressure point?

ok

Decks in Dental Physiology Class (60):