| 摘要 |
An elongate device (19), arcuate in cross-section, for placement around a vessel (4), comprises an essentially non-porous outer layer and a biodegradable inner layer. An alternative device comprises a tubular portion (3) for placement around a graft and a portion (2), arcuate in cross-section that can straddle a native vessel, at the site of an end-to-side anastomosis.
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