Perfusion and Pulmonary Regulation (V/Q) Flashcards
1
Q
what is meant by ventilation/perfusion (V/Q) ratio?
A
the amount of blood flow and exchange of oxygen
2
Q
what is ventilation (V)?
A
movement of air into and out of the lungs
3
Q
what is perfusion (Q)?
A
blood circulation and exchange of gas between lungs and capillaries
4
Q
what is a normal V/Q?
A
0.8
5
Q
what does it mean when we have a high V/Q?
A
low perfusion (Q) – less blood getting to the organs
6
Q
what does it mean when we have a low V/Q?
A
low ventilation (V) – more blood getting to the organs than gas exchange in the lungs
7
Q
where does oxygen bind on the hemoglobin?
A
iron molecules on the heme groups – 4 oxygen per hemoglobin
8
Q
A
