Central Venous Pressure--Nordgren

Question 1

Filling more than 3.5 L in empty circulatory system leads to this type of pressure (no flow)

Answer 1

mean circulatory filling pressure

~7 mmgHg

Question 2

How much is venous pressure affected by movement of blood out of venous compartment?

Answer 2

not much at all

veins are very compliant

50x more compliant than arteries

Question 3

How much is arterial affected by movement of blood out of venous compartment?

Answer 3

signifigantly

arteries are not very compliant

Question 4

Why is central venous pressure an indicator of circulatory status?

Answer 4

cardiac filling has critical influence on CV function

Starling’s Law

Question 5

Central venous compartment components

Answer 5

veins in thorax

right atrium

Question 6

Cardiac Output

vs

Venous Return

Answer 6

CO: blood leaving central venous compartment

–> it’s a series, so same as output from LV

Venous Return: rate ate which blood is coing back to central venous compartment

Question 7

Increased central venous pressure affects

cardiac output

venous return

positively/negatively

Answer 7

CO: positively

VR: negatively

central venous pressure balances these so they are equal

Question 8

Decreasing central venous pressure affects venous return how

Answer 8

increases venous return

Question 9

2 ways to change peripheral venous pressure

Answer 9

change in blood volume

changes in venous tone

Question 10