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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 or veins

References

1. Nikam N et al. Advances in stent technologies and their effect on clinical efficacy and safety. Med Devices (Auckl). 2014 Jun 3;7:165-78. PMID 24940085 PMC 4051714
2. Park JS, Jeong S, Lee DH. Recent Advances in Gastrointestinal Stent Development. Clin Endosc. 2015 May; 48(3): 209–215. PMID 26064820 PMC 4461664
3. Palmerini T et al. Long-Term Safety of Drug-Eluting and Bare-Metal Stents: Evidence From a Comprehensive Network Meta-Analysis. J Am Coll Cardiol. 2015 Jun 16;65(23):2496-507. PMID 26065988. Lay summary
4. ^ Jorge C, Dubois C Clinical utility of platinum chromium bare-metal stents in coronary heart disease. Med Devices (Auckl). 2015 Aug 27;8:359-67. PMID 26345228 PMC 4556305

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