The invention provides a device having two components: a needle advancing apparatus slidable longitudinally along a catheter to advance needles into a tissue membrane, such as a blood vessel wall, around an opening in the membrane; and, a suture retrieval assembly insertable through the catheter beyond...http://www.google.se/patents/US7670349?utm_source=gb-gplus-sharePatent US7670349 - Apparatus and method for positive closure of an internal tissue membrane opening
