Shunts/ Deadspace Part 2

Question 1

Shunt Values

Answer 1

10% Normal
10-20% Intrapulmonary Abnormality
20-30% Significant Intrapulmonary Diseases
30+ Life Threatening

Question 2

Shunt

Answer 2

Perfusion without ventilation
Shunt like disorders have a low V/Q
Shunt like disorders also cause a reduced PaO2

Question 3

Dead Space

Answer 3

Ventilation without Perfusion
Dead space disorders have a High V/Q Ratio
Cause an Increased PaCO2

Question 4

Normal Alveolar Ventilation

Answer 4

4 LPM
V = Minute Alveolar Ventilation
Q = Cardiac Output and Perfusion

Question 5

% Shunt Equation

Answer 5

CcO2 - CaO2/ CcO2 - CvO2