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1. WO2007010295 - STENT

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CLAIMS
1. An elongate device, actuate in cross-section, for placement around a vessel, comprising an essentially non-porous outer layer and a biodegradable inner layer.

2. A device comprising a tubular portion for placement around a graft and a portion, arcuate in cross-section, that can straddle a native vessel, at the site of an end-to-side anastomosis.
3. A device according to claim 2, wherein the tubular portion has an internal diameter of up to 8 mm.
4. A device according to claim 2 or claim 3, which is substantially Y- or T- shaped. 5. A device according to any of claims 2 to 4, which comprises two layers of material of which the inner layer is biodegradable.
6. A device according to any of claims 2 to 5, wherein the arcuate portion includes an angle of up to 270s.
7. A device according to claim 1 , which is essentially tubular.
8. A device according to claim 7, which includes an elongate slit.
9. A device according to any preceding claim, which includes an active agent.
10. Use of a device according to any preceding claim, in an arteriovenous bypass grafting procedure.