Patent ID: 8114031
Filing Date: 2012-02-14
Classification: A61M

Abstract:
1. A method of antegrade insertion of a guidewire via a common femoral artery into a superficial femoral artery of a human patient, the superficial femoral artery branching off from the common femoral artery anteriorly of a deep femoral artery, comprising: piercing a needle into the common femoral artery with a tip of the needle pointing obliquely in antegrade direction relative to the common femoral artery, the needle bounding a lumen oriented in an axial direction of the needle; providing a guidewire having a tip structure at its distal end and a curved deflection section located proximal of the tip structure at a distance of less than 5 mm from a proximal end of the tip structure, inserting a distal end portion of the guidewire into the lumen of the needle and urging the guidewire through the needle such that the distal end portion emerges in an axial direction of the needle from a distal end of the lumen of the needle into the common femoral artery, the guidewire being in a predetermined rotational orientation about a center line of the guidewire such that the curved deflection section springs back from the straightened condition inside the needle, as the guidewire distal end emerges from the needle, in an anterior direction towards its original curved shape, and advancing the guidewire wherein the tip of the guidewire deflects towards the anterior wall of the common femoral artery, contacts the anterior wall of the common femoral artery, contacts the anterior wall of the superficial femoral artery and enters the superficial femoral artery.