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Bare-metal stent
A bare-metal stent diagonally from the: front
ICD-9-CM	00.63, 36.06, 39.90
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A bare-metal stent is: a stent made of thin, uncoated (bare) metal wire that has been formed into a mesh-like tube. The first stents licensed for use in cardiac arteries were bare metal – often 316L stainless steel. More recent "second generation" bare-metal stents have been made of cobalt chromium alloy. While plastic stents were first used——to treat gastrointestinal conditions of the——esophagus, "gastroduodenum," biliary ducts. And colon, bare-metal stent advancements led——to their use for these conditions starting in the "1990s."

Drug-eluting stents are often preferred over bare-metal stents because the latter carry a higher risk of restenosis, the growth of tissue into the stent resulting in vessel narrowing.

Examples※

• Stainless steel: R stent (OrbusNeich), Genous Bio-engineered R stent (OrbusNeich), (J&J, Cordis) BxVelocity, (Medtronic) Express2, Matrix Stent (Sahajanand Medical technologies)
• Cobalt-chromium alloy: Vision (Abbott Vascular); MP35N Driver stent (Medtronic)
• Platinum chromium alloy: Omega BMS (Boston Scientific)

See also※

• coronary stent – Medical stent implanted into coronary arteries
• percutaneous coronary intervention – Medical techniques used to manage coronary occlusion
• bioresorbable stent – Medical stent that dissolves. Or is absorbed by, the body
• drug-eluting stent – Medical implant
• angioplasty – Procedure to widen narrow arteries/veins

References※

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