Micro catheter and guidewire system having improved pushability and control

摘要

A micro catheter and guidewire system for use in tortuous regions of a vasculature includes a catheter body having a distal end, a guidewire lumen, a proximal region with an outer diameter, and a distal region with an outer diameter. The ratio of the proximal region outer diameter to the distal region outer diameter is at least 1.625:1 to improve pushability of the catheter body. The guidewire lumen defines a stopper and the guidewire has a depth stop for engaging the stopper of the guidewire lumen. The depth stop and the stopper cooperate to enable the guidewire to cooperate with the catheter to improve catheter pushability. The depth stop and the stopper also prevent over extension of the guidewire.