THROMBUS ASPIRATION CATHETER AND METHOD OF USING THE SAME

摘要

A thrombus aspiration catheter is disclosed which can shear a thrombus and efficiently aspirate the thrombus. When the pressure of the inside of an inner tube is made negative, an outer tube is rotated around an axis relative to the inner tube, and an inner opening portion and an outer opening portion are positioned at an open position at which the inner opening portion and the outer opening portion overlap each other, a thrombus enters the inside of the inner tube through the inner opening portion and the outer opening portion. When the outer tube is further rotated up to a closed position at which the whole outer opening portion does not overlap the inner opening portion, the thrombus is sheared by an edge portion of the inner opening portion and an edge portion of the outer opening portion and into the inside of the inner tube.

主权项

1. A thrombus aspiration catheter for aspirating a thrombus by being inserted into a blood vessel and cutting the thrombus, comprising:
an inner tube in which an inner opening portion is formed in a distal portion of the inner tube; and an outer tube in which an outer opening portion is formed in a distal portion of the outer tube and which is positioned outside the inner tube so as to cover the inner tube so as to be rotatable relative to the inner tube between an open position at which at least a part of the outer opening portion overlaps the inner opening portion and a closed position at which a whole outer opening portion does not overlap the inner opening portion, wherein when the outer tube is at the open position, the thrombus enters an inside of the inner tube through the outer opening portion and the inner opening portion, the thrombus which has entered the inside of the inner tube is sheared by both edge portions of the outer opening portion and the inner opening portion by relatively moving the outer tube to the closed position, and the thrombus is aspirated through the inside of the inner tube.