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Late Signs of Shock: Recognizing Imminent Cardiovascular Collapse

Late (decompensated) shock indicates failure of compensatory mechanisms. Immediate, aggressive intervention is lifesaving.

Critical Signs

  1. Altered mental status: Confusion, agitation, obtundation, coma (cerebral hypoperfusion).
  2. Hemodynamic collapse: Systolic BP <90 mmHg unresponsive to fluids; thready/absent peripheral pulses; tachycardia (may be absent if on β‑blockers or in late stage).
  3. Respiratory failure: Tachypnea → shallow, irregular, gasping; hypoxemia refractory to O₂.
  4. Skin changes: Cold, clammy, mottled (livedo reticularis); cyanosis.
  5. Renal failure: Oliguria (<0.5 mL/kg/hr) → anuria.
  6. Coagulopathy: DIC—bleeding from IV sites, petechiae, elevated D‑dimer, low fibrinogen.
  7. Metabolic acidosis: Lactate >4 mmol/L (often >8); low pH, base deficit.
  8. Multi‑organ dysfunction: Elevated transaminases, creatinine, bilirubin; ARDS.

Immediate Management (ABCs)

  • Airway/breathing: Intubate if GCS ≤8 or respiratory failure.
  • Circulation: Large‑bore IV/IO access; 30 mL/kg crystalloid bolus; norepinephrine first‑line vasopressor; add vasopressin/epinephrine as needed.
  • Source control: Antibiotics (sepsis), blood products (hemorrhage), pericardiocentesis (tamponade), etc.
  • Monitor: Arterial line, CVC, lactate clearance, urine output, ScvO₂.

Early recognition of early shock (compensated) prevents progression. “Time is tissue.”

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