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14 Cards in this Set
- Front
- Back
Shock |
inadequate tissue perfusion & cellular oxygenation affecting multiple organ systems |
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Adequate Tissue Perfusion requires |
1. Blood volume. 2. Cardiac Output. 3. Vascular Bed Size |
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Formula for BP |
BP= CO x SVR |
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Cardiac output formula |
CO = SV x HR |
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Components of stroke volume |
1. Preload. 2. Afterload. 3. Contractility. |
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Components of oxygen content |
Partial pressure of oxygen, concentration of hemoglobin |
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Factors that increase O2 demand |
1. Increased BMR. 2. Infection/fever. 3. Increased work of organs. 4. Agitation/pain
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Cellular alteration in shock |
Impaired O2 delivery results in shift from Aerobic respiration to Anaerobic respiration, ATP is used more quickly and cell begins to run down |
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Cycle of shock |
Inadequate bloodflow to organs leads to tissue Hypoxia, causing the cell to switch over to Anaerobic respiration. This causes tissue Hypoxia, which leads to an accumulation of lactic acid and a fall in pH. Causing metabolic acidosis, which leads to cardiac depression & lessens bloodflow to organs. |
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Body responses to shock |
1. Initial stage: no visible symptoms yet 2. Compensatory stage: neural, hormonal and chemical responses 3. Progressive stage: multi-organ failure 4. Refractory stage: permanent damage, death is inevitable |
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Cardiogenic shock |
Due to heart failure, like a heart attack. Have inability of heart to contract, leading to reduced stroke volume or heart rate and ultimately lowered cardiac output |
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Causes of Cardiogenic Shock
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1. Acute Myocardial Infarction. 2. Severe Congestive Heart Failure 3. Cardiomyopathy. 4. Valvular Dysfunction. 5. Cardiac Tamponade. 6. P.E. 7. O.D. |
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Signs & Symptoms
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2. Crackles, Decreased U.O. 3. Nausea, Anxiety. 4. Sense of Impending Doom. 5. Hypotension. Oliguria. Cyanosis. 6. Cool Extremities, Reduced L.O.C. 7. Sinus Tach., J.V. Distension . |
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Cardiogenic Shock Hemodynamics
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2. CVP is high. 3. PCWP is high. 4. C.O. is low 5. SVR is high. |