| 摘要 |
<p num="1"><br/><br/><br/>A surgical instrument is provided including a housing having an orifice; a <br/>cannula defining a lumen which is in communication with the orifice; an <br/>obturator receivable through the orifice and the lumen; and a balloon having a <br/>distal side, a proximal side and an aperture extending through the distal side <br/>and the proximal side. The surgical instrument further includes at least one <br/>attachment member to facilitate welding of the cannula and a to the balloon.<br/>
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