erie county ems shock exam

what is perfusion?

the circulation of blood through an organ or tissue in sufficient amounts to meet the needs of the cells

hypoperfusion

inadequate blood flow to tissues and cells

hypovolemic shock

inadequate circulating volume

cardiogenic shock

heart cannot pump effectively enough to maintain perfusion

obstructive shock

something physically prevents effective circulationi

important causes of obstructive shock

tension pneumothorax, cardiac tamponade, massive pulmonary embolism

pulmonary edema

developed from cardiogenic shock when blood backs up into the pulmonary circulation

distributive shock

vascular system dilates abnormally and becomes excessively permeable, creating inadequate effective circulation

what are the three types of distributive shock?

anaphylatic, neurogenic, and septic

septic shock

severe infection produces systemic circulatory abnormalities

anaphylactic shock

a severe allergic reaction can produce vasodilation, increased vascular permeability, and potentially life-threatening airway and respiratory problems

neurogenic shock

loss of sympathetic vascular tone, often associated with spinal cord injury, causes widespread vasodilation