Term
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Definition
| physiologic state characterized by systemic reduction in tissue perfusion, resulting in decreased tissue oxygen delivery |
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Term
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Definition
| a condition, in which circulation fails to meet the metabolic need of the tissue & at the same time fails to remove the metabolic waste products |
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Term
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Definition
| Inadequate tissue perfusion to meet tissue demands |
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Term
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Definition
| Result of inadequate blood flow and/or oxygen delivery |
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Term
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Definition
| Inadequate peripheral perfusion leading to failure of tissue oxygenation |
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Term
| Effects of Shock on Organ |
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Definition
Heart – ↓ CO / hypotension / myocardial depressants
Lung - ↓gas exchange / tachypnoea / pulmonary edema
Endocrine – ADH → ↑ reabsorption of water
CNS – perfusion ↓ – drowsy
Blood - Coagulation abnormalities – DIC
Renal - ↓ GFR - ↓ urine output
GIT – mucosal ischaemia – bleeding & hepatic - ↑ enzyme levels |
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Term
| Hypovolemic Shock Etiology |
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Definition
* Blood loss.
- hemorrhage
* Plasma / body water loss.
* Electrolytes imbalance.
- Vomiting.
- Diarrhea.
- Dehydration. |
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Term
| Cardiogenic Shock Etiology |
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Definition
* Valvular heart disease
* Myocardial infarction
* Cardiac arrhythmias
* Cardiomyopathy |
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Term
| Neurogenic Shock Etiology |
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Definition
* Paraplegia.
* Quadriplegia.
* Trauma to spinal cord.
* Spinal anesthesia. |
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Term
| Anaphylactic Shock Etiology |
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Definition
* Injections - Penicillins.
* Anaesthetics
* Stings.
* Shelfish |
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Term
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Definition
* Gram +
* Gram -
* Fungi / Virus
* Protozoa |
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Term
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Definition
* Hypo & Hyperthyroidism.
* Adrenal insufficiency. |
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Term
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Definition
- Collapse of subcutaneous veins of extremities esp. the feet, which become pale and cool
- Sweat on forehead, hand and feet
- Urine output normal.
- Pulse rate normal.
- Blood pressure normal.
- Patient feels thirsty and cold. |
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Term
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Definition
- Mild shock features +
drowsy & confused
- Oliguria
- Pulse rate increased usually less then 100/min.
- Blood pressure normal initially then falls in later stage. |
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Term
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Definition
- Unconscious.
- Gasping respiration.
- Anuria.
- Rapid pulse.
Profound hypotension |
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Term
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Definition
- Initial
- Non progressive (compensated stage)
- Progressive (decompensated stage)
- Refractory |
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Term
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Definition
| The cells become leaky and switch to anaerobic metabolism |
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Term
| Non progressive/ Compensated Stage |
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Definition
| Attempt to correct the metabolic upset of shock. |
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Term
| Progressive/ Decompensated Stage |
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Definition
| Eventually the compensation will begin to fail. |
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Term
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Definition
| Organs fail and the shock can no longer be reversed. |
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