Integrated embolic protection devices
Embolic protection elements are integrated with a catheter or access sheath for any catheter. A catheter with an integrated embolic protection element comprises a catheter shaft, an embolic filter slidably mounted on a distal portion of the shaft, a proximal stop for limiting the proximal movement of the embolic filter, and a distal stop for limiting the distal movement of the embolic filter. The filter comprises a porous mesh material defining a collection chamber for captured emboli and has a collapsed and a deployed configuration. The filter may be collapsed by an access sheath used with the catheter. An access sheath may comprise a tubular main body and an embolic filter mounted on the distal portion of the tubular main body. The embolic filter may evert into the central lumen of the sheath or may be constrained on the exterior of the sheath with a larger diameter outer tube.
1. A method for delivering a replacement valve to a patient's aortic valve, said method comprising:
advancing a delivery sheath over the patient's aortic arch, wherein the delivery sheath comprises a catheter shaft which carries the replacement valve and an embolic filter therein;
advancing the catheter shaft from the delivery sheath to position the replacement valve proximate the patient's aortic valve while the embolic filter remains collapsed in the delivery sheath;
advancing the catheter shaft from the delivery sheath to position the embolic filter in the aorta;
expanding the embolic filter in the aorta to prevent emboli from entering the brachiocephalic artery, the left carotid artery and, the left subclavian artery;
deploying the replacement valve in the aortic valve after the embolic filter has been expanded in the aortic arch to prevent emboli from entering the brachiocephalic artery, the left carotid artery and, the left subclavian artery;
retracting the embolic filter and the catheter shaft back into the delivery sheath; and
removing the delivery sheath from the patient.
2. The method of claim 1 , wherein the replacement valve is disposed on a distal portion of the catheter shaft and wherein the embolic filter is slidably disposed proximally of the replacement valve on the distal portion of the catheter shaft.
3. The method of claim 2 , further comprising sliding the catheter shaft and the replacement valve relative to the embolic filter.