ETCO2

Question 1

Uses?

Answer 1

Confirm intubation
Prognosticate
RR
First sign of ROSC

Question 2

Value for poor outcome?

Answer 2

< 1.33

Question 3

Value for good outcome

Answer 3

> 2

Question 4

What does it mean?

Answer 4

Ventilators and circulatory components
Cells use o2 and glucose to make energy, releases co2 into blood stream, amount of co2 depends on circulation/perfusion

In CA ultimate shock state, no co2 production unless effective chest compression performed

Question 5

Phase 1

Answer 5

Inspiration baseline inspired has no co2

Question 6

Phase 2

Answer 6

Inspiratory upstroke, transition between dead space and lung emptying

Question 7

Phase 3

Answer 7

Alveolar plateau, last alveolar gas sampled

Question 8

Phase 0

Answer 8

Inspiration downstroke

Question 9

Bronchospasm etco2

Answer 9

Curved top phase 2

Question 10

High etco2

Answer 10

Fever, increased CO or BP, hypoventilation, bronchial intubation, partial obstruction, rebreathing, leak in vent, inadequate gas flow, malfuntion

Question 11

Low etco2

Answer 11

Hypothermia, apnoea, total obstruction, extraction, circuit disconnect, reduced CO, hypotension/volaemia, PE, CA