Vascular medical device, system and method
The present application discloses a covered stent and a method for navigating the covered stent to a branch vessel, the covered stent including a main body and at least one lateral side branch connected to the main body. A system of covered stents and a method for implanting, including interconnecting the covered stents is also disclosed.
1. A delivery catheter for delivery of a second covered stent to be connected to a first covered stent comprising:
a delivery lumen with a distal orifice configured for delivery and deployment of said second covered stent through said lumen at a target site of a side branch of said first covered stent, wherein a distal end of said delivery lumen is pre-bent to conform to a shape of said side branch of said first covered stent, wherein said first covered stent comprises a guiding element, and said guiding element is distally attached to a connection point at said side branch;
a longitudinal recess forming a slit in a wall of said delivery lumen; said longitudinal recess being configured to catch the guiding element into the longitudinal recess such that said distal end of said delivery lumen extends distally beyond said connection point when said guiding element is positioned through said delivery lumen and said longitudinal recess; and
a guiding mate through which said guiding element is configured to be further positioned, such that said catheter is configured to slide along said guiding element to an orifice of said side branch, wherein said guiding mate has a distal end positioned proximally at a distance from said distal orifice of said delivery lumen such that said delivery lumen extends beyond said connection point when said distal end of said guiding mate is positioned adjacent to said connection point,
wherein said connection point limits said guiding mate from further distal advancement beyond said connection point while allowing said delivery lumen of said catheter to extend beyond said connection point with said pre-bent distal end of said delivery lumen to extend into said side branch beyond said connection point during a delivery procedure of said second covered stent through said lumen.
2. The catheter according to claim 1 , wherein the catheter is a multi-lumen catheter and said guiding mate is a first lumen different from said delivery lumen of said catheter for delivery of said second covered stent, and said first lumen has a distal opening which is arranged at the catheter at a distance proximal of a distal opening of said delivery lumen.
3. The catheter of claim 2 , wherein a sheath surrounding said delivery lumen of said catheter is bent at least along a portion of said distance.
4. The catheter of claim 2 with said guiding element arranged through said guiding mate for delivery of said second stent graft through said delivery catheter to said target site of said branch, said second stent graft preferably being an extension stent graft.