Method and apparatus for treating an arterial lesion
One disclosed embodiment comprises a method for treating lesions in the carotid artery of a mammalian body. The method comprises transcervical access and blocking of blood flow through the common carotid artery (with or without blocking of blood flow through the external carotid artery), shunting blood from the internal carotid artery and treating the lesion in the carotid artery.
1. A method of treating a lesion in an artery of a patient, comprising:
forming an arterial access location in a common carotid artery;
positioning at least a portion of the arterial access device into the common carotid artery via the arterial access location;
causing blood to flow from the carotid artery to a return location via the arterial access device and a shunt connected to the arterial access device by at least one of:
(1) actively pumping blood from the carotid artery to the return location via the arterial access device and the shunt connected to the arterial access device; and
(2) occluding blood flow in at least a portion of the carotid artery to form a pressure gradient that establishes retrograde blood flow through the carotid artery such that blood flows into the arterial access device and the shunt connected to the arterial access device;
wherein the arterial access device comprises an elongate member defining an internal lumen that extends from a distal opening at a distal region of the arterial access device to a proximal opening at a proximal region of the arterial access device, wherein the internal lumen receives blood flow through the distal opening from the common carotid artery, and wherein the shunt comprises a shunt lumen connected to the arterial access device at a location between the distal and proximal openings of the arterial access device, and wherein the shunt provides a pathway for blood to flow out of the internal lumen of the arterial access device at a location between the distal and proximal openings of the arterial access device; and
treating the lesion by deploying a stent on the lesion.
2. The method of claim 1 , wherein forming an arterial access location in the common carotid artery comprises making a transcervical incision to expose a region of a common carotid artery.
3. The method of claim 1 , wherein forming an arterial access location in the common carotid artery comprises percutaneously accessing the common carotid artery.
4. The method of claim 1 , wherein actively pumping blood comprises using a syringe fluidly connected to the arterial access device to aspirate the blood from the arterial access device.
5. The method of claim 1 , wherein actively pumping blood comprises using a pump fluidly connected to the arterial access device.
6. The method of claim 1 , wherein the return location is a vein.
7. The method of claim 1 , wherein the return location is an external container.
8. The method of claim 7 , wherein the external container is a syringe.
9. The method of claim 1 , further comprising filtering the blood.
10. The method of claim 1 , further comprising sensing the flow of blood being pumped from the common carotid artery to the return location using a flow sensor.
11. The method of claim 1 , wherein positioning an arterial access device further comprises making an arterial puncture directly into the common carotid artery through a transcervical incision to position an arterial access device.
12. The method of claim 11 , further comprising removing the arterial access device from the common carotid artery and repairing the arterial puncture.
13. The method of claim 1 , further comprising coupling an arterial closure element to the arterial access location.
14. The method of claim 13 , wherein the closure element is a suture.
15. A method of treating a lesion in an artery of a patient, comprising:
forming an arterial access location in a common carotid artery;
positioning at least a portion of the arterial access device into the common carotid artery via the arterial access location;
causing blood to flow from the carotid artery to a return location via the arterial access device and a shunt connected to the arterial access device by at least one of:
(1) actively pumping blood from the carotid artery to the return location via the arterial access device and the shunt connected to the arterial access device; and
(2) occluding blood flow in at least a portion of the carotid artery to form a pressure gradient that establishes retrograde blood flow through the carotid artery such that blood flows into the arterial access device and the shunt connected to the arterial access device;
wherein the arterial access device comprises an elongate member defining an internal lumen that extends from a distal opening at a distal region of the arterial access device to a proximal opening at a proximal region of the arterial access device, wherein the internal lumen receives blood flow through the distal opening from the common carotid artery, and wherein the shunt comprises a shunt lumen connected to the arterial access device at a location between the distal and proximal openings of the arterial access device, and wherein the shunt provides a pathway for blood to flow out of the internal lumen of the arterial access device at a location between the distal and proximal openings of the arterial access device; and
treating the lesion by deploying an angioplasty balloon on the lesion.
16. The method of claim 15 , wherein forming an arterial access location in the common carotid artery comprises making a transcervical incision to expose a region of a common carotid artery.
17. The method of claim 15 , wherein forming an arterial access location in the common carotid artery comprises percutaneously accessing the common carotid artery.
18. The method of claim 15 , wherein actively pumping blood comprises using a syringe fluidly connected to the arterial access device to aspirate the blood from the arterial access device.
19. The method of claim 15 , wherein actively pumping blood comprises using a pump fluidly connected to the arterial access device.
20. The method of claim 15 , wherein the return location is a vein.
21. The method of claim 15 , wherein the return location is an external container.
22. The method of claim 21 , wherein the external container is a syringe.
23. The method of claim 15 , further comprising filtering the blood.
24. The method of claim 15 , further comprising sensing the flow of blood being pumped from the common carotid artery to the return location using a flow sensor.
25. The method of claim 15 , wherein positioning an arterial access device further comprises making an arterial puncture directly into the common carotid artery through a transcervical incision to position an arterial access device.
26. The method of claim 25 , further comprising removing the arterial access device from the common carotid artery and repairing the arterial puncture.
27. The method of claim 15 , further comprising coupling an arterial closure element to the arterial access location.
28. The method of claim 16 , wherein the closure element is a suture.
29. The method of claim 15 , wherein the lesion is a source of embolic material.
30. The method of claim 1 , wherein the lesion is a source of embolic material.