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Hypovolaemic shock

Grades of hypovolaemic shock

  • Grade 1
    • 15% blood volume (~750 ml)
    • Mild resting tachycardia
    • Alert
    • Cross-match 2U
  • Grade 2
    • 15 - 30% blood volume (750 - 1500 ml)
    • Moderate tachycardia, fall in pulse pressure, delayed capillary return
    • Anxious / aggressive
    • Cross-match 2U
  • Grade 3
    • 30 - 40% blood volume (1500 - 2000 ml)
    • Hypotension, tachycardia, low urine output
    • Drowsy / aggressive
    • 4U Type-specific blood
  • Grade 4
    • > 40% blood volume (2000 -2500 ml)
    • As above but with profound hypotension
    • Drowsy / unconscious
    • 2U universal blood + 4U type-specific + 6U cross-matched


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