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Flashcards in Respiratory Failure Deck (15):
1

ARDS

Neutrophilic inflammation

Fluid accumulates

Can't remove edema

Reduced surfactant

2

Phases of ARDS

Exudative
Fibroprilerative phase - Pulm HTN

Recorvery phase

3

Causes of hypoxemia/hypercapnea

Low PP of inhaled O2
Alveolar hypoventilation
Diffusion impairment
R-L shunt (V/Q = INfinity)
VQ mismatch

4

V/Q = 0
vs.
V/Q = infinity

0 - alveoli equilibrates with venous blood...think atelectasis...lower O2

Infinity - alveoli equilibrates with atmosphere...think PE...higher O2

5

Regional V/Q

V/Q higher at the top vs. the bottom

6

INcreasing RR

Would fix if diffuse alveolar hypoventilation

Changes made will only affect the good lung

7

Vasodilator effects

Lung already attempts to divert blood by selective vasoconstriction

8

Transusing blood

No impact on hypoxemia

9

CO poisoning

All burns/explosions

Common in house fires

High CO affinuty for Hb

will bind 1 of 4 sites and become carboxyHb

Increase O2 affinty at 3 reminaing sites

Shifts cruve to the left

Cherry-red lips

10

Alveolar ventilation

(TV-dead)*RR

Normally the dead is about 150 mL

Do the math to figure out best option

11

Endocarditis

Fevers, IV drug use, cardiac murumr, spinter hemorrhages

Think about septic emboli to lungs causing pneumonia and ARDS

12

If pt pregnant

Low chest wall and lung compliance

13

WHat to look for in venous return compromise

Hypotenson and hypoxia

Poorly compliant lungs

Elevated airwya pressures

Decreased breath sonds

JVP

14

INcreased intreathoracic pressure differential

Excessive ventilatory pressures can reduce

More commonly seen in excessive ventilation without sufficient time to exhale...this can lead to air trappign and over distension of the lungs...common cause of cardiac arrest following intubation for COPD/asthma

Can lead to pneumothorax

15

Cardiac tamponade diff

Low arterial pressure
Distended neck veins
Muffled heart sounds