Table 1 Properties of Everolimus eluting Xience stents versus Sirolimus eluting Treat stents
Xience stent (Xience V, Xience Prime LL) [3] | Treat stent [4] | |
|---|---|---|
Drug eluted | Everolimus eluting | Sirolimus eluting |
Terminal half-life of drug eluted | 26–30 h | 46–72 h |
Generation stent | 2nd generation | 2nd generation |
Stent thickness | 81µ | 65µ |
Stent material | L605 cobalt–chromium alloy | L605 cobalt–chromium alloy |
Biocompatibility of stent material | Contains 9–11% nickel, chromium. Can occasionally cause metal allergy | Contains 9–11% nickel, chromium. Can occasionally cause metal allergy |
Drug carrier/polymer | Primer layer of PBMA (Poly N Butyl Methacrylate) and a drug reservoir made of poly-vinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) | Biocompatible lactide and glycolide family of biodegradable polymer |
Biocompatibility of drug carrier/polymer | Primer Methacrylate known to cause hypersensitivity reaction and aneurysm formation Reservoir PVDF-HFP is bio compatible | Biocompatible |