A surgical vascular introducer sheath comprising first and second members and a retainer. The first member has a lumen for receiving a surgical instrument therethrough and a first side opening in an outer wall in fluid communication with the first lumen. The second member has a lumen and a side opening...http://www.google.es/patents/US6589214?utm_source=gb-gplus-sharePatente US6589214 - Vascular introducer sheath with retainer
