Patent ID: 8394078
Filing Date: 2013-03-12
Classification: A61B

Abstract:
1. An interventional catheter assembly comprising: (a) an elongated tubular catheter for navigation within a patient's body; (b) an operating head mounted at a distal end of the catheter; (c) a guidewire lumen extending through the catheter and the operating head; (d) at least one aspiration port in proximity to the operating head in communication with an aspiration lumen that communicates with a vacuum system during operation of the interventional catheter assembly for withdrawing fluid and obstructive material through the aspiration lumen; and (e) an elongated cylindrical bushing extending proximally through a distal portion of the guidewire lumen, the elongated cylindrical bushing extending from a distal end positioned at a distal region of the operating head proximally through the operating head and having a proximal end terminating at a proximal end of the operating head; wherein an entire inner surface of the elongated cylindrical bushing is smaller than the guidewire lumen, thereby reducing the guidewire clearance along a length between the distal and proximal ends of the elongated cylindrical bushing during operation of the interventional catheter assembly over a guidewire.