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Local areas of edema occur in such other conditions as angioedema and urticaria, edematous plaques in dourine and infectious equine anemia, and in purpura hemorrhagica.
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the accumulation of excess fluid in a fluid compartment. Edema may also be classified by location, such as pulmonary edema or brain edema; types found in certain locations have specific names, such as .
This accumulation can occur in the cells (cellular edema), in the intercellular spaces within tissues (interstitial edema), or in potential spaces within the body.
Drug therapy includes an edema characterized by a condition in which a finger pressed into the skin over an accumulation of fluid will result in a temporary depression in the skin.
Normal skin and subcutaneous tissues quickly rebound when the pressure is released. those of dependent body parts like the lower extremities.
Physical exam A term used to describe the indentation caused when fingertip pressure is applied to the skin, forcing fluids into the underlying tissue; PE occurs when there is an ↑ amount of low protein fluid in the interstitial space, associated with disorders caused by high capillary filtration–DVT, chronic venous insufficiency, or venous obstruction, or hypoalbuminemia; pitting is a subjective assessment using the grading scale of 1 for mild and up to 4 for deep pitting. When pressed firmly with a finger, tissues that are swollen with extravascular fluid retain the shape of the depression produced by the finger.
See: illustration Edema can be caused by a variety of factors, including hypoproteinemia, in which a lowered concentration of plasma proteins decreases the osmotic pressure, thereby permitting passage of abnormal amounts of fluid out of the blood vessels and into the tissue spaces.
See also anasarca, ascites, hydrothorax, hydropericardium and anatomically located edemas, e.g.As fluid continues to fill the pulmonary interstitial spaces the dyspnea becomes more acute, respirations increase in rate, and there is audible wheezing.The cough becomes productive of frothy sputum tinged with blood, giving it a pinkish hue.Eventually, if the condition persists, the patient becomes less responsive to stimuli as levels of consciousness decrease.Ventricular arrhythmias develop and breath diminish. In some patients these phases are telescoped as the pulmonary edema develops rapidly and the final stages of respiratory insufficiency are evident in a very short period of time.
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