Exchange method for emboli containment
First Claim
1. A catheter exchange method, comprising the steps of:
- introducing a guidewire having a proximal and a distal end into the vasculature of a patient until the distal end is near to a treatment site;
delivering a first catheter comprising an elongate catheter shaft having a proximal end, a distal end, and at least one lumen extending therethrough, over the proximal end of the guidewire until the distal end of the first catheter is near to the treatment site;
removing the first catheter from the guidewire;
delivering a second catheter comprising an elongate catheter shaft having a proximal end, a distal end, and at least one lumen extending therethrough, over the proximal end of the guidewire until the distal end of the second catheter is near to the treatment site.
3 Assignments
0 Petitions
Accused Products
Abstract
The present invention provides a method for exchanging catheters while containing emboli within a blood vessel such as a saphenous vein graft, coronary artery, carotid artery, or other similar vessels. A guidewire is inserted through the vasculature of a patient until it reaches a desired treatment site. A therapy catheter is then inserted over the guidewire until the distal end of the therapy catheter reaches the treatment site. The guidewire has a distally mounted balloon which is inflated to occlude the blood vessel. Then, the therapy catheter provides means for treating the vessel at the treatment site. After treatment, the therapy catheter is removed from the guidewire and exchanged with an aspiration catheter which rides over the guidewire until the distal end of the aspiration catheter reaches the treatment site. The aspiration catheter applies negative pressure to remove any emboli formed by the treatment procedure.
-
Citations
28 Claims
-
1. A catheter exchange method, comprising the steps of:
-
introducing a guidewire having a proximal and a distal end into the vasculature of a patient until the distal end is near to a treatment site;
delivering a first catheter comprising an elongate catheter shaft having a proximal end, a distal end, and at least one lumen extending therethrough, over the proximal end of the guidewire until the distal end of the first catheter is near to the treatment site;
removing the first catheter from the guidewire;
delivering a second catheter comprising an elongate catheter shaft having a proximal end, a distal end, and at least one lumen extending therethrough, over the proximal end of the guidewire until the distal end of the second catheter is near to the treatment site. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 21, 22, 24, 25, 26, 27, 28)
-
-
19. A method for exchanging catheters while isolating emboli to a working area in a blood vessel, comprising the steps of:
-
delivering a guidewire having a proximal and a distal end into the blood vessel, the distal end having an occlusive device mounted thereon, wherein the occlusive device is positioned at a point distal to a desired working area;
advancing a therapy catheter having a proximal and a distal end over the guidewire such that the distal end of the therapy catheter is located within the desired working area;
actuating the occlusive device such that the device contacts the walls of the vessel to at least partially obstruct blood flow through the vessel and isolate emboli to the working area;
performing treatment to the blood vessel using therapy means located at the distal end of the therapy catheter, said treatment creating emboli within the blood vessel;
removing the therapy catheter from the guidewire;
advancing an aspiration catheter having a proximal and a distal end over the guidewire such that the distal end of the aspiration catheter is located within the working area; and
applying negative pressure to the aspiration catheter to remove emboli isolated within the working area.
-
-
23. A method of containing emboli within a working area of a blood vessel, comprising the steps of:
-
delivering a guidewire having an occlusive device mounted on a distal end of the guidewire;
deploying the occlusive device at a position downstream from a desired working area such that blood flow is at least partially occluded by the occlusive device;
creating emboli within the working area of the blood vessel; and
advancing an aspiration catheter over the guidewire for removing the emboli from the blood vessel.
-
Specification