2018年Circulatory SHOCK - Unife:循环性休克-查-精选文档-文档资料.ppt
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1、Definition,Inadequate perfusion (oxygen supply) of tissues, resulting in: Organ dysfunction Cellular and organ damage And if not quickly corrected Death,Causes of Shock a quick list:,Heart Attack Anaphylaxis Loss of Circulating Blood Volume (bleeding , burns, dehydration) Venous Dilation (allergy, p
2、ain, drugs, heat stroke, infection) High or Low Body Temperature,Signs of Shock,Pulse: Rapid, weak, thready Tachycardia Why? Compensation for decreased MAP sensed by _ Baroreceptors,Signs of Shock,Respirations Shallow, irregular, labored May be tachypnea (increased respiratory rate.) Why? Compensati
3、on for hypoxia sensed by: Chemoreceptors,Signs of Shock: MAP,Blood Pressure Low, Falling Hypotension is a late finding: why? Compensatory mechanisms work at first to maintain MAP,Signs of Shock,Due to hypoperfusion: Decreased “mentation” - confused, sluggish, anxious Skin cold, mottled,Emergency Tre
4、atment,Evaluate vital signs BP, Respiration Rate, Pulse Oximeter, Temp. Control bleeding Prevent loss of body heat,Causes of Shock: Classification (the real list),Low Output Circulatory Failure Hypovolemic shock (too little volume) Cardiogenic shock (pump failure) Obstructive shock Distributive shoc
5、k: Venous pooling High Output Circulatory Failure Distributive Shock: Sepsis, toxic shock, anaphylaxis:,Hypovolemic Shock,CO reduced due to loss of intravascular VOLUME Reduced venous return Causes Most often, blood loss (hemorrhage) Dehydration Burns Fluid lost into peritoneal cavity w/ pancreatiti
6、s MAP = CO * TPR,Hypovolemic Shock,CO reduced due to loss of intravascular VOLUME Reduced venous return Causes Most often, blood loss (hemorrhage) Dehydration Burns Fluid lost into peritoneal cavity w/ pancreatitis MAP = CO * TPR,Cardiogenic Shock,Myocardial Infarction (most frequent cause) Acute Va
7、lvular Dysfunction e.g. papillary muscle rupture post-MI Arrhythmia e.g., heart block, ventricular tachycardia MAP = CO * TPR,Cardiogenic Shock,Myocardial Infarction (most frequent cause) Acute Valvular Dysfunction e.g. papillary muscle rupture post-MI Arrhythmia e.g., heart block, ventricular tachy
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