Side-port catheter

A method of using a catheter and an angled wire for re-entry a true lumen of a vessel wherein the catheter comprises a catheter body, the catheter body having, a catheter body wall defining a lumen, and a side-port defined by a side of the catheter body wall in fluid communication with the lumen, the catheter having an outer surface and a longitudinal axis, the catheter body wall defining a vestibule and a side-port wall winch is perpendicular to the longitudinal axis of the catheter, the side-port having a proximal end and a distal end, the side-port wail at the proximal end extending from the lumen to the outer surface of the catheter, the side-port wall at the distal end of the side-port extending perpendicularly from the lumen to the vestibule, the catheter body wall defining the vestibule as extending distally from the distal end of the side-port to the outer surface of the catheter, the method comprising the steps of:

• (a) advancing the angled wire through the lumen of the catheter which has a distal end opening and which is positioned sub-intimally within a wall 3 f the vessel such that a layer of tissue of the vessel contacts the outer surface of the catheter adjacent and surrounding the side-port whereby the layer of tissue covers the side-port and wherein the lumen is in fluid communication with the side-port and the distal end opening:
• (b) positioning a distal tip of the angled wire through the side-port which has a longitudinally elongate opening such that the distal tip contacts the layer of tissue which covers the longitudinally elongate opening of the side-port without contacting a side of the distal end of the side-port, and
• (c) wherein the side of the distal end of the side-port has the vestibule cut into an outer portion of it which is adjacent the outer surface of the body of the catheter to provide for advancing the angled wire through the side-port such that the distal tip of the angled wire slides along the layer of tissue without puncturing the layer of tissue until a side of the angled device is supported by an inner portion of the distal end of the side-port.

A method of using a catheter and an angled wire for re-entry into a true lumen of a vessel wherein the catheter comprises a catheter body, the catheter body having a catheter body wall defining a lumen, and a side-port defined by a side of the catheter body wall in fluid communication with the lumen, the catheter having an outer surface and a longitudinal axis. the catheter body wall defining a vestibule and a side-port wall which is perpendicular to the longitudinal axis of the catheter, the side-port having a proximal end and a distal end, the side-port w all at the proximal end extending from the lumen to the outer surface of the catheter, the side-port wall at the distal end of the side-port extending perpendicularly from the lumen to the vestibule, the catheter body wall defining the vestibule as extending distally from the distal end of the side-port to the outer surface of the catheter, the method comprising the steps of:

• (a) advancing the angled wire through the lumen of the catheter which has a distal end opening and which is positioned sub-intimally within a wall of the vessel such that a layer of tissue of the vessel contacts the outer surface of the catheter body adjacent the side-port whereby the layer of tissue covers the side-port and wherein the lumen is in fluid communication with the side-port and the distal end opening;
• (b) positioning the angled wire through the side-port which has a longitudinally elongate opening such that a distal tip of the angled wire is spaced apart from both a side of the distal end of the side-port as well as the layer of tissue which is covering the longitudinally elongate opening of the side-port, and
• (c) wherein the side of the distal end of the side-port has the vestibule cut into an outer portion of it which is adjacent the outer surface of the body of the catheter, such that further advancing the angled wire causes a side of the angled wire to abut and be supported by an inner portion of the distal end of the side-port which is adjacent the lumen while avoiding contact with the layer of tissue.