Apparatus and system for removing an obstruction from a lumen
First Claim
1. An apparatus for removing an obstruction from inside of a lumen, comprising:
- a catheter defining a first fluid pathway and a second fluid pathway, wherein at least a portion of said catheter is adapted for insertion into the lumen, said first pathway accommodates an inlet fluid flow path from a proximal portion of the catheter towards a distal end of the catheter for providing pressurized fluid into the lumen, and said second pathway accommodates a return fluid flow path from said distal end of said catheter towards said proximal end;
wherein the first fluid pathway consists of a first channel and the second fluid pathway consists of a second channel;
a guidewire longitudinally extending through said catheter and having a tip portion extending beyond said distal end of said catheter for dislodging the obstruction upon rotation;
means for rotating said guidewire to cause said tip portion to dislodge the obstruction; and
a nozzle formed at the distal end of said first channel for extending into said lumen and configured to direct pressurized fluid to said lumen and said return fluid flow path.
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Accused Products
Abstract
An apparatus and system for removing an obstruction from a body lumen simultaneously mechanically dislodges the obstruction, macerates the obstruction, and aspirates the effluent caused thereby. The maceration is effected by directing pressurized fluid to the obstruction, while the obstruction is dislodged by a tip portion formed on the end of a guidewire. The apparatus includes a flexible catheter having at least two channels individually accommodating fluid flow paths towards and away from the obstruction. The guidewire may be disposed in either of the channels or a third channel formed in the flexible catheter. The apparatus also includes a drive unit for rotating the guidewire. The drive unit may be an external drive unit, such as an electrical motor, or may include drive elements formed on the guidewire within a drive chamber, across which the fluid flows and imparts energy against the drive elements to cause rotation of the guidewire.
200 Citations
14 Claims
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1. An apparatus for removing an obstruction from inside of a lumen, comprising:
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a catheter defining a first fluid pathway and a second fluid pathway, wherein at least a portion of said catheter is adapted for insertion into the lumen, said first pathway accommodates an inlet fluid flow path from a proximal portion of the catheter towards a distal end of the catheter for providing pressurized fluid into the lumen, and said second pathway accommodates a return fluid flow path from said distal end of said catheter towards said proximal end; wherein the first fluid pathway consists of a first channel and the second fluid pathway consists of a second channel; a guidewire longitudinally extending through said catheter and having a tip portion extending beyond said distal end of said catheter for dislodging the obstruction upon rotation; means for rotating said guidewire to cause said tip portion to dislodge the obstruction; and a nozzle formed at the distal end of said first channel for extending into said lumen and configured to direct pressurized fluid to said lumen and said return fluid flow path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification