View source for Template:Hemorrhagic shock classes

===Classes of [[hemorrhagic shock]]<ref>American College of Surgeons Committee on Trauma. Shock: in Advanced Trauma Life Support: Student Course Manual, ed 10. 2018. Ch 3:62-81</ref>===
{| class="wikitable"
! Class
! I
! II
! III
! IV
|-
| Approximate blood loss
| <15%
| 15-30%
| 30-40%
| >40%
|-
| Heart rate
| ↔
| ↔/↑
| ↑
| ↑↑
|-
| Blood pressure
| ↔
| ↔
| ↔/↓
| ↓
|-
| Pulse Pressure (mmHg)
| ↔
| ↓
| ↓
| ↓
|-
| Respiratory Rate (per min)
| ↔
| ↔
| ↔/↑
| ↑
|-
| Urine Output (mL/hr)
| ↔
| ↔
| ↓
| ↓↓
|-
| Glasgow coma scale score
| ↔
| ↔
| ↓
| ↓
|-
| Base deficit^
| 0 to -2 mEq/L
| -2 to -6 mEq/L
| -6 to -10 mEq/L
| -10 or less mEq/L
|-
| Need for blood products
| Monitor
| Possible
| Yes
| Massive transfusion protocol
|}
^Base excess is the quantity of base (HCO3-, in mEq/L) that is above or below the normal range in the body. A negative number is called a base deficit and indicates metabolic acidosis.