Chapter 25 - Venous hemodynamics

Question 1

Transmural pressure

Answer 1

Difference between intraluminal pressure with interstitial pressure

Question 2

Normal venous drainage superficial and deep

Answer 2

1) Calf muscle force blood towards heart
2) calf muscle relax; blood moves superficial to deep
3) at rest; superficial and deep drain to heart

Question 3

Effect of respiration on venous return

Answer 3

Inspiration: increase intraabdominal; decrease intrathoracic
Expiration: decrease intraabdminal; increase intrathoracic

Question 4

Effect of valsalva on venous return

Answer 4

Stops venous return from everywhere
Augmentation occurs after valsalva ends

If valsalva causes flow then it’s incompetent valves