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11 Cards in this Set
- Front
- Back
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Define Shock
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Shock results from inadequate perfusion of the body's cells with oxygenated blood.Shock can damage any and all tissues and organ sytems in the body
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What are the three stages of shock?
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Compensation
Progression Irreversibility |
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Explain the compensatory stage of shock
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in this stage the body activates several compensatory mechanisms in an attempt to overcome the increasing consequences of anearobic metabolism and to maintain homeostasis
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what are the clinical signs of shock in the the compensatory stage
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decreased BP and increased HR
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Can the body recover from the compensatory stage of shock? explain why?
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Yes. At this stage the body can compensate for the changes in tissue perfusion. if the cause of the shock is corrected then the pt can recover with few or no long term side effects.
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What happens if the body dosnt recover from the compensatory stage of shock?
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If the cause of the shock is not resolved then the pt enters the progressive stage of shock
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What are the comensatory mechanisms?
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Baroreceptors and chemoreceptors in the carotid and aortic bodies immediatly respond by activating the autonomic nervous system. This stimulates vasoconstriction and the release of adrenalione and noradrenaline.
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Explain an increased heart rate due to shock
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Shock decreases the volume of blood pumped from the heart and the blood flow to the brain. this will acticvate the baroreceptors in the carotid bodies to increase the HR as it trys to supply enough blood to the vital organs.
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Why do patients with shock go pale?
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This is a result of vasoconstriction of the peripheral vessels, because the skin is the least priority tissue for blood flow.
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why do patients with shock get cold and clammy skin
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this is a result of vasoconstriction. shock decreases the skin surface temperature as a result of vasodilation, which increases the internal body temperature
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What dose vasoconstriction do?
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It maintains bloodflow to essential organs such as the brain, lungs and heart. but restricts or diverts blood from non-essential organs such as the GI tract and the reproductive organs.
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