drug coated stent!

drug coated stent

Comprehensive Analysis

1) "Drug" -- As to drug coated stent 1drug Pronunciation: 'dr&g Function: noun Etymology: Middle English drogge 1 a obsolete : a substance used in dyeing or chemical operations b : a substance used as a medication or in the preparation of medication c according to the Food, Drug, and Cosmetic Act (1) : a substance recognized in an official pharmacopoeia or formulary (2) : a substance intended for use in the diagnosis, cure, mitigation, treatment, or prevention of disease (3) : a substance other than food intended to affect the structure or function of the body (4) : a substance intended for use as a component of a medicine but not a device or a component, part, or accessory of a device 2 : a commodity that is not salable or for which there is no demand -- used in the phrase drug on the market 3 : something and often an illegal substance that causes addiction, habituation, or a marked change in consciousness - drug·gy also drug·gie /'dr&-gE/ adjective Pronunciation Symbols For other meanings, see Drug (disambiguation). Oral medication Caffeine is one of the most widely used psychoactive substances in the world. A drug is any biological substance, synthetic or non-synthetic, that is taken primarily for non-dietary needs. It is usually synthesized outside of an organism, but introduced into an organism to produce its action. That is, when taken into the organism's body, it will produce some effects or alter some bodily functions (such as relieving symptoms, curing diseases or used as preventive medicine or any other purposes). To many people the word "drug" primarily means "illegal recreational drugs". Note that natural endogenous biochemicals (such as hormones) can bind to the same receptor in the cell, producing the same effect as a drug. Thus, drug is merely an artificial definition that distinguishes whether that molecule is synthesized within an organism or outside an organism. For instance, insulin is a hormone that is synthesized in the body; it is considered as a hormone when it is synthesized by the pancreas inside the body, but if it is introduced into the body from outside, it is considered as a drug. It is a substance which is not food,[1] and which, when ingested, affects the functioning of the mind, or the body, or both. However, under the philosophy of Chinese medicine, food is also considered a drug as it affects particular parts of body and cures some diseases. Thus, food does satisfy the above definition of drug so long as ingestion of it would alter some bodily functions. 1 Medication 2 Recreational drugs 3 Legal definition of drugs 4 Drugs as status symbols 5 List of drugs 6 Footnotes 7 See also 8 External links A medication ..." 2) "Coated" -- As to drug coated stent 1coat Pronunciation: 'kOt Function: noun Usage: often attributive Etymology: Middle English cote, from Anglo-French, of Germanic origin; akin to Old High German kozza coarse wool mantle 1 a : an outer garment worn on the upper body and varying in length and style according to fashion and use b : something resembling a coat 2 : the external growth on an animal 3 : a layer of one substance covering another <a coat of paint> - coat·ed /'kO-t&d/ adjective - coat·less adjective Pronunciation Symbols ..." 3) "Stent" -- As to drug coated stent stent Pronunciation: 'stent Function: noun Etymology: Charles Thomas Stent died 1885 English dentist : a short narrow metal or plastic tube often in the form of a mesh that is inserted into the lumen of an anatomical vessel (as an artery or a bile duct) especially to keep a previously blocked passageway open Pronunciation Symbols It has been suggested that Stent Graft be merged into this article or section. (Discuss) Endoscopic image of self-expanding metallic stent in esophagus, which was used to palliatively treat esophageal cancer. Endoscopic image of biliary stent seen protruding from ampulla of Vater at the time of duodenoscopy In medicine, a stent is either an expandable wire form or perforated tube (conventionally perforated by means of laser cutting) that is inserted into a natural conduit of the body to prevent or counteract a disease-induced localized flow constriction. 1 Applications 1.1 Problems 2 Etymology 3 See also 4 External links The main purpose of a stent is to counteract significant decreases in vessel or duct diameter. Stents are often used to alleviate diminished blood flow to organs beyond an obstruction in order to maintain an adequate delivery of oxygen. Although the most common use of stents is in coronary arteries, they are widely used in other tubular structures, such as central and peripheral arteries and veins, bile ducts, esophagus, colon, trachea or large bronchi, ureters, and urethra. One of the drawbacks of vascular stents is the potential development of a thick smooth muscle tissue inside the lumen, the so-called neointima. Development of a neointima is variable but can at times be so severe as to re-occlude the vessel lumen (restenosis), especially in the case of smaller diameter vessels, which often results in reintervention. Consequently, current research focuses on the reduction of neointima after stent placement. Considerable improvements have been made, including the use of more bio-compatible materials, anti-inflammatory drug-eluting stents, resorbable stents, and others. Fortunately, even if stents are eventually covered by neointima, the minimally invasive nature of their deployment makes reintervention possible and usually straig..." 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