Block 2b Pulmonary Circulation Flashcards
1
Q
Where do lymphatics empty?
A
into right thoracic lymph duct –> subclavian vein –> SVC
2
Q
What is systolic/diastolic pressure of the pulmonary artery?
A
25/8
3
Q
What percentage of blood volume is held by the pulmonary circulation?
A
10%
4
Q
What pressures in the pulmonary artery promote edema?
A
> 30 mmHg
5
Q
What conditions promote pulmonary edema
A
left heart failure (increases left-atrial pressure)
6
Q
Describe characteristics of Zone 1?
A
no flow (abnormal)
7
Q
What conditions can cause lung tissue to be in Zone 1?
A
hemorrhage, continuous positive pressure in the alveoli
8
Q
Describe characteristics of Zone 2?
A
intermittent flow (common in upper lung)
9
Q
Describe characteristics of Zone 3?
A
continuous flow
10
Q
How is it that pulmonary circulation is low pressure, but high flow?
A
compliant vasculature
