Page 186 - 2026 SMOG

HEMORRHAGE CLASSIFICATION (ATLS)
Class 1 Class 2 Class 3 Class 4
Estimated Blood <750 750–1500 1500–2000 >2000
Loss (mL) 15% 15–30% 30–40% >40%
Heart Rate (min) Normal to Mild Tachycardia Tachycardia Tachycardia
slightly elevated >100–119 120–140 >140
Respiratory Rate Normal Mild Tachypnea Tachypnea Tachypnea
(min) 12–20 20–24 24–40 >40
Blood Pressure Normal or SBP with mild SBP decreased* SBP decreased
(from baseline) slightly elevated decline (<90mmHg)
Urine Output Normal Slight decrease Decreased Negligible
(mL/hr) >30 20–30 5–15 <5
Capillary Refill 1–2 seconds 2 seconds >2 seconds >3 seconds
Mental Status Normal or Mildly anxious, Anxious, Confused,
and Skin slightly anxious skin may become confused, skin lethargic, skin
(color/texture) cool, clammy cool, clammy will be cool/
cold, pale
*Revised/reviewed March 2025 IAW current published JTS TC3 CPG guidelines.

178 • PROCEDURES