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Purulent or suppurative exudate consists of plasma with both active and dead neutrophils, fibrinogen, and necrotic parenchymal cells. This kind of exudate is consistent with more severe infections, and is commonly referred to as pus. Fibrinous exudate is composed mainly of fibrinogen and fibrin.
Hydrocolloid dressings are used to treat uninfected wounds. [6] Dressings may be used, under medical supervision, even where aerobic infection is present; the infection should be treated appropriately. [citation needed] The dressing is applied to a cleaned wound. Hydrocolloid patches are sometimes used on the face for acne.
Granulation tissue is composed of tissue matrix supporting a variety of cell types, [3] most of which can be associated with one of the following functions: formation of extracellular matrix; operation of the immune system; vascularisation; An excess of granulation tissue (caro luxurians) is informally referred to as "proud flesh". [4]
The 3D polymeric network of hydrogels is highly hydrated with 90-99% water w/w; it is capable of binding many times more water molecules when assembled than in the uncross-linked state. [2] [3] Hydrogel dressings can absorb up to 600 times their initial amount of water, including fluid-based wound exudates.
A wound is any disruption of or damage to living tissue, such as skin, mucous membranes, or organs. [1] [2] Wounds can either be the sudden result of direct trauma (mechanical, thermal, chemical), or can develop slowly over time due to underlying disease processes such as diabetes mellitus, venous/arterial insufficiency, or immunologic disease. [3]
Purulent sputum [5] contains pus, composed of white blood cells, cellular debris, dead tissue, serous fluid, and viscous liquid . Purulent sputum is typically yellow or green. It is seen in cases of pneumonia, bronchiectasis, lung abscess, or an advanced stage of bronchitis. [6]
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A seroma contains serous fluid. [1] This is composed of blood plasma that has seeped out of ruptured small blood vessels and the inflammatory fluid produced by injured and dying cells. [ citation needed ] Seromas are different from hematomas , which contain red blood cells , and abscesses , which contain pus and result from an infection .