STENT DELIVERY SYSTEM AND METHOD

摘要

A braided stent (10) includes coiled distal and proximal anchors adapted to be disposed in the kidney and bladed, respectively. The stent is threaded onto an elongate member (30) which is advanced distally to position the stent through the ureter. The stent may be releasably coupled to a guidewire (34) and advanced distally by a tubular positioner (30) threaded over the guidewire. Retracting the guidewire into the positioner releases the stent and completes deployment. The stent may include a distal nosepiece which may be inserted through a side port and into a first lumen of a dual lumen tube. A rod in the first lumen is advanced forward to engage the nosepiece and thus move the stent distally. Retraction of the rod disengages the stent and thus completes deployment. A second lumen in the tube receives a guidewire which may be moved independently of the rod and stent.