primary shock

primary shock,

a state of physical collapse comparable to fainting. It may be the result of slight pain, such as that produced by venipuncture, or may be caused by fright. Primary shock is usually mild, self-limited, and of short duration. Severe injury may prolong and merge primary shock with secondary shock. Compare hemorrhagic shock.

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shock,

n 1. a state of collapse of the body after injury or trauma. Shock may be either primary or secondary. The principal effects of shock are slowing of the peripheral blood flow and reduction in cardiac output.
2. a circulatory insufficiency caused by a disparity between circulating blood volume and vascular capacity.

shock, galvanic,

n pain produced as a result of galvanic currents caused by similar or dissimilar metallic restorations.

shock, hemorrhagic,

n an ineffectual circulating volume of blood resulting from loss of whole blood.

shock, insulin,

n a coma resulting from too much insulin or an inadequate intake of food. Symptoms include wet or moist skin, hypersalivation or drooling, normal blood pressure, tremors, dilated pupils, normal or bounding pulse, and firm eyeballs. Sugar and acetoacetic acid may be present in bladder urine but are absent in the second specimen. The blood sugar is low (hypoglycemia). See also coma, diabetic.

shock, neurogenic,

n shock caused by loss of nervous control of peripheral vessels, resulting in an increase in the vascular capacity. Onset is usually sudden but is quickly reversible if the cause is removed and treatment is instituted immediately.

shock, primary,

n shock that has a neurogenic basis in which pain and psychic factors affect the vascular system. Occurs immediately after an injury.

shock, secondary,

n shock that occurs some time after the injury (6 to 24 hours later). It is associated with changes in capillary permeability and subsequent loss of plasma into the tissue spaces. Changes in capillary permeability are probably related to histamine release associated with tissue injury.

shock, traumatic,

n a shock produced by trauma, whether psychic or physical. In general usage, this term refers to shock following physical trauma, with hemorrhage, peripheral blood vessel dilation, and changes in capillary permeability.