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 a distal side of the tissue membrane. The needle
advancing apparatus advances suture through the tissue wall. The suture
retrieval assembly grabs the suture on the distal side of the tissue
membrane for extraction thereof through the opening in the tissue
membrane. A method for suturing a membrane beneath the patient's skin is
also disclosed.