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Flashcards in Shock Deck (13):
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Shock

State of hypofusion of tissues with blood

1

Three possible mechanisms of shock

1 pump failure of heart
2 loss of circulating fluid
3 loss of peripheral vascular tone

2

Shock results in

Tissue anoxia
Multi-organ failure
Cardio respiratory failure

3

Types of shock

1. Cardiogenic
2. Hypovolemic
3. Hypotonic

4

Events of shock

Hypovolemia and vasodilation can lead to Heart Failure
--> decreased cardiac output --> hypofusion of tissue --> anoxia --> Shock

Shock can lead to renal failure, GI lesions, ARDS and death

Anoxia can lead to DIC which leads to both hypovolemia and heart failure

Anoxia also releases cytokines, causes acidosis, and increases vasodilation.

5

ARDS

Acute Respiratory Distress Syndrome
"Shock lung"

Low BP --> stagnation --> pulmonary edema

Alveolar-capillary units break down --> anoxia --> release of TNF and IL-1

6

Three stages of shock

Early/compensated
Decompensated
Irreversible

7

Compensated shock

Adaptive characteristics compensate, including:
Tachycardia
Peripheral artery vasoconstriction
Reduced urine production

Normal BP, no serious ischemia

8

Decompensated shock

Early compensatory mechanisms failing.

Hypotension
Tachypnea
Oliguria
Acidosis

9

Tachypnea

Rapid respiration, SOB

10

Oliguria

Decreases renal fluid output

11

Irreversible shock

Circulatory collapse
Hypofusion of vital organs
Loss of vital functions

12

DIC

Disseminated intravascular collapse
Widespread clot formation due to Hypercoagulability of blood, fluid loss and hemoconcentration.