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WHAT IS SHOCK?
Shock results from poor tissue perfusion and tissue hypoxia from inadequate circulatory compensations needed to sustain acutely increased body metabolism.
Blood volume Pump Peripheral resistance
5ቤተ መጻሕፍቲ ባይዱ
Causes of Shock
• Severe or sudden blood loss
• Large drop in body fluids
• Major infections
• High spinal injuries
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Development of the concept of shock
• A history of the 200 years to recognize shock:
“shake”, “attack” From superficial syndrome to microcirculatory level , cellular level, molecular level
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Compensatory mechanisms (early shock)
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Compensatory mechanisms
precapillary resistance vessel to contract, to decrease capilary hydrostatic pressure.
• Circulatory level: blood pressure • Microcirculatory level: inadequate tissue perfusion • Cellular level and molecular level: