CritCare

Question 1

What are classes of blood loss and their respective volumes/% loss?
What’s first sign of blood loss?

Answer 1

Class I: <750 mL/15%
Class II: 750-1500/15-30
Class III: 1500-2000/30-40
Class IV: >2000
Narrowed pulse pressure with class II

Question 2

How does HR correlate with blood loss?

Answer 2

> 100 w class II, >120 w class III, >140 w class IV

Question 3

How does BP correlate with blood loss?

Answer 3

Class II: minimal decrease w narrowed pulse pressure
Class III: <90 w narrowed pulse pressure
Class IV: Significant hypotension w unobtainable pulse pressure?

Question 4

How does urine output correlate with blood loss?

Answer 4

Class II: <0.5
Class III: <0.5
Class IV: None

Question 5

How does base deficit correlate w blood loss?

Answer 5

II: -2~6
III: -6~10
IV: -10 or lower