Ventilation-Perfusion Relationships PDF
Document Details
Uploaded by ErrFreeKazoo
Tamethia Perkins
Tags
Summary
This presentation details ventilation-perfusion relationships, focusing on how the V/Q ratio varies throughout the lung, particularly in the upright position. It explains the differences in ventilation and perfusion at the apices and bases, including how these affect alveolar oxygen and carbon dioxide pressures.
Full Transcript
VENTILATION-PERFUSION RELATIONSHIPS Tamethia Perkins MS, RRT-NPS, RRT-ACCS RT 3005/6005 V/Q Ratio Ideally, each alveolus should receive the same amount of ventilation and blood flow. Alveolar ventilation= 4L/min. Pulmonary blood flow= 5L/min. V/Q ratio = 0.8 V/Q Ratio V/Q...
VENTILATION-PERFUSION RELATIONSHIPS Tamethia Perkins MS, RRT-NPS, RRT-ACCS RT 3005/6005 V/Q Ratio Ideally, each alveolus should receive the same amount of ventilation and blood flow. Alveolar ventilation= 4L/min. Pulmonary blood flow= 5L/min. V/Q ratio = 0.8 V/Q Ratio V/Q ratio varies throughout the lung. UPRIGHT: Apices : more ventilation than perfusion = V/Q>0.8. PAO2 rises and PACO2 falls. Bases: more perfusion than ventilation = V/Q
