Learning Objectives
- Discuss the unique features of the pulmonary circulation (as compared to the systemic circulation)
- Define V/Q ratio and discuss the origins and consequences of both high and low V/Q ratios
- Discuss the regional differences in pulmonary blood flow in terms of the 3 zone model
- Describe the effects of gravity and exercise on pulmonary perfusion, ventilation, V/Q, and gas exchange
- Discuss how fluid balance is maintained in the lung, define the 4 starlings forces and discuss the differences compared to renal and systemic capillaries
- Discuss the cause and impact of pulmonary oedema, pulmonary shunts, and pulmonary embolisms
- Resources
- how does pulmonary circulation differ to systemic circulation?
- what is the average pulmonary blood volume?
- what are features of zone 1 blood flow?
- what are features of zone 2 blood flow?
- what are features of zone 3 blood flow?
Ventilation-Perfusion Ratio (V/Q)