Syncope

SYNCOPE

  • Circulatory failure
  • Acute and progressive failure of the peripheral circulation is known as shock.
  • Shock is “stagnant hypoxia”.
  • Haemorrhagic shock
    • Common cause of shock in animals. Upto 20% blood loss animal can tolerate.
    • Hypovalemic before reinfusion
    • Normovalemic – after reinfusion
  • Traumatic shock
    • Depressed state of vital function that results from severe traumatic injury.
    • Two kinds of traumatic shock
      • Primary or immediate
      • Secondary or delayed – due to loss of plasma occurred few hours after injury.
        • Primary shock
          • Overwhelming of vital centres in the medulla by nerve impulse originating in the injured area and conveyed to CNS.
          • Death with in few minutes from vasomotor collapse in primary shock.
  • Septic shock
    • Fatal infection by pyogenic organisms following an injury if animal survives immediate complication of shock and haemorrhage.
    • Suppurative pathogenic bacteria.
      • Rupture of intestines
      • Injury to gastro intestinal tract
    • Reticulo endothelial system of a shocked animal – not having capability of detoxifying the bacterial toxins.
    • Endotoxin produces peripheral circulatory failure (exact mechanism in not known).
  • Thermal shock
    • Exposure to extreme degree of heat or cold,
    • It is are characterized by progressive hypovalemia,
    • Haemoconcentration and
    • Circulatory failure.
  • Anaphylactic shock
    • Is an immunologic phenomenon.
    • Occurred between sensitized body cells and specific antigens.
Last modified: Tuesday, 5 June 2012, 10:04 AM