1. Endothelial damage
  • Thermal injury – Red blood cells suffer thermal damage from severe burns, seen in the blood as fragmented red blood cells and microspherocytes.
  • Shear stress damage occurs in mechanical heart valves due to high flow via defective valves or periprosthetic leaks through the suture ring, keeping a valve in place.
  • Microangiopathic hemolytic anemia – Capillary fibrin deposition can significantly impair red blood cells.
  1. Infection
  • Clostridium perfringens sepsis, typically in ascending cholangitis or necrotizing fasciitis, may induce severe intravascular hemolysis with significant spherocytosis.
  • Intravascular hemolysis may be due to Plasmodium falciparum malaria.
  1. Toxins or medications

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