Shock Stages

Initial/Early
1. Slight change to MAP (5-10mm Hg)
2. ▼ cardiac output (15%)
3. Slight ▲ HR
4. Switch from aerobic to anaerobic metabolism
5. ▲ lactic acid
Compensatory
1. Activation of compensatory mechanisms
  1. Tachypnea, tachycardia, vasoconstriction
    1. ▼ MAP (10-15mm Hg)
    2. Continued ▼ cardiac output (15-30%)
Progressive
1. Compensatory mechanisms fail
  1. Hypoperfusion
  2. ▼ cardiac output (30-40%)
  3. ▼ cardiac perfusion/contractility
  4. ▲ Ischemia of non-essential organs (kidneys, intestines, skin)
  5. ▲ capillary permeability
  6. ▲ HR, weak/thready pulse
Refractory
1. Irreversible cell/tissue/organ death
  1. MODS
  2. Severe hypoxemia
  3. Renal failure
  4. DIC
  5. Circulatory failure

Resource summary

	Created by mshanrn about 9 years ago