Emboli protection devices and related methods of use

Abstract

An embolic protection system for treating a lesion in a blood vessel is provided. The embolic protection system includes a guide catheter, an evacuation sheath, a guidewire, and an infusion catheter. The guide catheter has a guidewire lumen. The evacuation sheath has an evacuation lumen and a sealing surface and is configured to move within the lumen of the guide catheter. The guidewire is configured to move within the lumen of the guide catheter and the evacuation lumen. The infusion catheter has an infusion lumen, at least one infusion port, and a guidewire lumen configured to accept the guidewire, the infusion catheter guidewire lumen being shorter than the guide catheter guidewire lumen. Furthermore, the infusion catheter is configured to move within the lumen of the guide catheter and the evacuation lumen over the guidewire. The system may further comprise a dilation catheter having a dilation balloon and a guidewire lumen.

1 . An embolic protection system for treating a lesion in a blood vessel, comprising:
 a guide catheter having a guidewire lumen;   an evacuation sheath configured to move within the lumen of the guide catheter and having an evacuation lumen and a sealing surface;   a guidewire configured to move within the lumen of the guide catheter and the evacuation lumen; and   an infusion catheter having an infusion lumen, at least one infusion port, and a guidewire lumen configured to accept the guidewire, the infusion catheter being configured to move within the lumen of the guide catheter and the evacuation lumen and over the guidewire, wherein the infusion catheter guidewire lumen is shorter than the guide catheter lumen.   
   
   
       2 . The embolic protection system of  claim 1 , wherein the sealing surface is configured to form a seal with the guide catheter. 
   
   
       3 . The embolic protection system of  claim 1 , further comprising a dilation catheter having a dilation balloon at a distal end and a guidewire lumen, wherein the guidewire lumen of the dilation catheter has a first cross-sectional dimension, and the infusion catheter has a second cross-sectional dimension larger that the first dimension. 
   
   
       4 . The embolic protection system of  claim 1 , wherein the infusion lumen has a first length and the guidewire lumen of the infusion catheter has a second length shorter than the first length. 
   
   
       5 . The embolic protection system of  claim 1 , wherein the infusion catheter guidewire lumen has first and second open ends, and wherein the guidewire lumen is sized such that when a first end of the guidewire lumen is positioned distal to a distal end of the guide catheter, the second end of the guidewire lumen is positioned within the guide catheter. 
   
   
       6 . An embolic protection system for treating a lesion in a blood vessel, comprising:
 an evacuation sheath having an evacuation lumen and a scaling surface;   a guidewire configured to move within the evacuation lumen; and   an infusion catheter having an infusion lumen, at least one infusion port, and a guidewire lumen configured to accept the guidewire, the infusion catheter being configured to move within the evacuation lumen and over the guidewire, wherein the infusion lumen has a first length and the infusion catheter guidewire lumen has a second length substantially shorter than the first length.   
   
   
       7 . The embolic protection system of  claim 6 , further comprising a guide catheter having a guide lumen, wherein the infusion catheter guidewire lumen is shorter than the guide lumen. 
   
   
       8 . The embolic protection system of  claim 6  further comprising a guide catheter, wherein the infusion catheter guidewire lumen has first and second open ends, and wherein the guidewire lumen is sized such that when the first end of the guidewire lumen is positioned distal to a distal end of the guide catheter, the second end of the guidewire lumen is positioned within the guide catheter.