Which parts /sides of the lung have the maximum perfusion?
A)Bases of the lung in an upright position
B)Apices of the lung in upright position
C)Right side lung in right side lying position
D)Both B and C
E)Both A and C

Question

Quizplus · Accepted Answer

Both A and C (bases of the lung in an upright position and right side lung in right side lying position) will have the maximum perfusion.
Gravity tends to pull blood into the dependent positions of the lung. Therefore, in those areas perfusion is greater than ventilation. The non-dependent areas will have more ventilation. The knowledge of ventilation and perfusion inequalities is important in physical therapy because patients with cardiopulmonary pathology may find it distressful if positioned wrongly during the treatment. Distress caused by a wrong position is due to poor gas exchange in the dependent lung because of ventilation - perfusion inequalities.

Which Parts /Sides of the Lung Have the Maximum Perfusion