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Edema (American English), also spelled oedema (British English), and also known as fluid retention, dropsy and hydropsy, is the build-up of fluid in the body's tissue, [1] a type of swelling. [4] Most commonly, the legs or arms are affected. [1] Symptoms may include skin that feels tight, the area feeling heavy, and joint stiffness. [1]
Peripheral edema is edema (accumulation of fluid causing swelling) in tissues perfused by the peripheral vascular system, usually in the lower limbs. In the most dependent parts of the body (those hanging distally ), it may be called dependent edema.
Nephrotic syndrome edema initially appears in parts of the lower body (such as the legs) and in the eyelids. In the advanced stages it also extends to the pleural cavity and peritoneum (ascites) and can even develop into a generalized anasarca. Hyperlipidaemia in nephrotic syndrome is typically caused by two mechanisms. [12]
Grade 1 (mild edema): Involves the distal parts such as a forearm and hand or a lower leg and foot. The difference in circumference is less than 4 cm (1.6 in) and no other tissue changes are present. Grade 2 (moderate edema): Involves an entire limb or corresponding quadrant of the trunk. Difference in circumference is 4–6 cm (1.6–2.4 in).
[4] Paroxysmal nocturnal dyspnea is a common symptom of several heart conditions such as heart failure with preserved ejection fraction, in addition to asthma, chronic obstructive pulmonary disease, and sleep apnea. [8] Other symptoms that may be seen alongside paroxysmal nocturnal dyspnea are weakness, orthopnea, edema, fatigue, and dyspnea. [9]
Myxedema's characteristic physical sign is non-pitting edema, in contrast to pitting edema. [1] Myxedema can also occur in the lower leg (pretibial myxedema) and behind the eyes (exophthalmos). Severe cases, requiring hospitalization can exhibit signs of hypothermia, hypoglycemia, hypotension, respiratory depression, and coma.
Hypoalbuminemia can be caused through a number of different mechanisms, each with the result of decreasing albumin levels. These include: 1) impaired synthesis within the liver, 2) increased utilization by tissue, 3) distributional issues, and 4) increased excretion or loss. [7]
However, the exact mechanism that causes bone marrow edema is still unknown. It is only known that the presence of bone marrow edema is usually associated with the progression of various diseases such as osteonecrosis. [29] Different pathophysiology mechanisms are established based on the cause of the bone marrow edema.
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