Coil shaft

摘要

Systems for delivering medical devices, as well as related methods are described.

主权项

1. An implantable medical endoprosthesis delivery system, comprising:
an outer member; and an inner tubular member disposed within the outer member, the inner tubular member defining a guidewire lumen and having a distal tip with a distal opening in fluid communication with the guidewire lumen, the inner tubular member comprising a coil having a proximal coil portion and a distal coil portion, the distal coil portion including windings having a spacing therebetween that differs from a spacing, if any, between windings of the proximal coil portion, wherein:
the spacing between the windings of the distal coil portion is greater than the spacing, if any, between windings of the proximal coil portion;at least some of the windings of the distal coil portion surround the guidewire lumen of the system;the windings of the distal coil portion have an outer diameter that is smaller than an outer diameter of the windings of the proximal coil portion; andan implantable medical endoprosthesis is disposed radially between the outer member and the windings of the distal coil portion.