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Extravasation is the leakage of a fluid out of its contained space into the surrounding area, especially blood or blood cells from vessels. In the case of inflammation , it refers to the movement of white blood cells through the capillary wall , into the surrounding tissues.
Extravasation is the leakage of intravenously (IV) infused, and potentially damaging, medications into the extravascular tissue around the site of infusion. The leakage can occur through brittle veins in the elderly, through previous venipuncture access, or through direct leakage from wrongly positioned venous access devices.
Neutrophils extravasate from blood vessels to the site of tissue injury or infection during the innate immune response.. In immunology, leukocyte extravasation (also commonly known as leukocyte adhesion cascade or diapedesis – the passage of cells through the intact vessel wall) is the movement of leukocytes (white blood cells) out of the circulatory system (extravasation) and towards the ...
Oral mucocele (also mucous extravasation cyst, mucous cyst of the oral mucosa, [1] and mucous retention and extravasation phenomena) is a condition caused by two related phenomena - mucus extravasation phenomenon and mucous retention cyst. Mucous extravasation phenomenon is a swelling of connective tissue consisting of a collection of fluid ...
Angiopellosis allows for the extravasation of multiple cells during a single event. The blood vessel will actively remodel around a cluster/group of cells and allow the cells to exit in a single event. Diapedesis only allows for a single white blood cell to migrate across the blood vessel wall at a given time.
An injury to the urethra leaving Buck's fascia intact results in a collection of urine (extravasation) limited to the penis, deep to Buck's fascia. If the injury to the bulb of the penis results in urethral injury accompanying a tear of Buck's fascia, then extravasated blood and urine accumulates in the superficial perineal space, passing into the penis (outer to Buck's fascia) as well as the ...
Vitreous hemorrhage is the extravasation, or leakage, of blood into the areas in and around the vitreous humor of the eye. [1] The vitreous humor is the clear gel that fills the space between the lens and the retina of the eye.
Enhanced permeability and retention (EPR) effect and passive targeting. The enhanced permeability and retention (EPR) effect is a controversial concept [1] [2] by which molecules of certain sizes (typically liposomes, nanoparticles, and macromolecular drugs) tend to accumulate in tumor tissue much more than they do in normal tissues.