| 摘要 |
<p num="1"><br/><br/><br/>A medical implant made from multiple layers of non-synthetic, natural tissues <br/>is provided. The medical device includes openings that extend radially through <br/>the wall of the medical implant. One advantage of the medical implant is that <br/>a synthetic support structure is not needed. As a result, problems associated <br/>with implanting a foreign material into a body may be avoided.<br/>
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