Blood 3

Question 1

What are the 4 classes of haemorrhages?

Answer 1

• Class I
• Class II
• Class III
• Class IV

Question 2

What is a class I haemorrhage?

Answer 2

Up to 15% blood volume

• Medical intervention not req
• Blood donor sessions typically remove 8-10% blood vol

Question 3

What is a class II haemorrhage?

Answer 3

15-30% blood vol

• Rapid HR, systolic & diastolic blood pressure variance decreases, body compensates with peripheral vasoconstriction, skin pale and cool
• Treat by inc volume - saline solution

Question 4

What is a class III haemorrhage?

Answer 4

30-40% blood vol

• Blood pressure drops, HR inc, brain function dec
• Treat by inc volume - saline solution and blood transfusion

Question 5

What is a class IV haemorrhage?

Answer 5

> 40% blood vol

• Body can no longer compensate - aggressive resuscitation req

Question 6

What is an Embolus?

Answer 6

A blood clot that has broken loose & travels in the circulation

Question 7

What are the 3 steps in haemostasis? (stopping a bleed/cut in a blood vessel)

Answer 7

• Vascular spasm
• Formation of a platelet plug (thrombus)
• Formation of a blood clot

Question 8

Watch back the video on vascular spasm - slide doesn’t make sense alone

Answer 8

:)

Question 9

What is the other name for platelets?

Answer 9

Thrombocytes

Question 10

What are thrombocytes?

Answer 10

Colourless cell fragments that break off from Magakaryocytes

Smaller than erythrocytes

Question 11

What do thrombocytes contain?

Answer 11

• Mitochondria
• SER
• Cytoplasmic granules
• Have no nucleus

Question 12

How many thrombocytes are there per ml?

Answer 12

100,000 to 500,000

Question 13

Finish from platelet plugs

Answer 13

thank u