Week 2 - Lesson 1 (Part 2) Flashcards Preview

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Flashcards in Week 2 - Lesson 1 (Part 2) Deck (29)
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1
Q

What do valves do? (3)

A
  1. Prevent back flow
  2. Storage for the blood
  3. Helps blood get back to the heart
2
Q

What kind of diameter is there when valves are locked?

A

Wider diameters

3
Q

When should the valves be locked into place?

A

When you are not moving

- sitting or standing

4
Q

When should the valves be open?

A

As you move the muscles will contract and the blood gushes

- opening the valves

5
Q

When is back flow prevented?

A

During diastole

6
Q

What forces the valves to open?

A

Momentum during systole

- muscle contraction

7
Q

When do valves close?

A

When momentum decreases

- at rest

8
Q

What happens to the thoracic pressure when blood moves forward into the right atrium?

A

It decreases

9
Q

With spectral doppler, what does it look like when you have a more venous pulsatile flow?

A

More defined peaks and troughs

10
Q

Where do you get more venous pulsatile flow?

A

When you are closer to the heart

11
Q

What is an example of venous pulsatile flow?

A

Hepatic veins

12
Q

What are examples of venous flow that is slightly further away from the heart? (2)

A
  1. Common femoral veins

2. Common iliac veins

13
Q

What is an example of venous flow that is distal?

A

Popliteal vein

14
Q

What does distal venous flow look like?

A

Relatively flat with few smooth bumps, continuous flow

15
Q

Why does arterial flow differ?

A

Because it depends on the vascular bed being supplied

16
Q

What is an example of low arterial resistance flow?

A

In the brain

17
Q

What does low arterial flow look like on a spectral doppler?

A

Lower peaks

18
Q

What kind of vascular bed do brains have?

A

Low

19
Q

What is an example of high arterial resistance flow?

A

Femoral artery

20
Q

Why is the femoral artery an example of high arterial resistance flow?

A

Because it doesn’t need blood flow continuously

- exercise is the exception

21
Q

Why is the brain an example of low arterial resistance flow?

A

Because it is always is working and always needs blood flow

22
Q

What does high arterial flow look like on a spectral doppler?

A

Higher peaks

- more pulsatile

23
Q

What kind of vascular bed does the femoral artery have?

A

High

24
Q

What do veins do?

A

Carry blood to the heart

25
Q

Do veins have a pulse?

A

No

26
Q

Where are veins located?

A

Near the surface of the skin

27
Q

What do arteries do?

A

Carry blood away from the heart

28
Q

Do arteries have a pulse?

A

Yes

29
Q

Where are arteries located?

A

Deeper under the skin