主に生体組織からなり、しかもバルサルバ洞に相当する張り出し部位によって、逆流防止効果及び弁の開口率が向上した、人工弁付きの人工血管を提供すること。 To provide an artificial blood vessel with an artificial valve which mainly consists of a living tissue, and moreover has a back flow preventing effect and improved opening rate of a valve which are improved by an overhang part corresponding to a Valsalva sinus. - 特許庁