Medical device for modification of left atrial appendage and related systems and methods
Devices, methods and systems are provided for occluding an opening within the tissue of a body, such as a left atrial appendage. In one embodiment, a medical device coupled to a delivery catheter includes a fluid flow path that facilitates contrast fluid to pass through the delivery catheter and the medical device to a distal side thereof to provide imaging information as to the position of the medical device positioned in the opening, such as the left atrial appendage. In another embodiment, a medical device is coupled to a delivery catheter, the medical device including flaps adjacent a hub of the medical device that close-off a bore of the hub upon the catheter being detached from the medical device.
1. A method for modifying a left atrial appendage (“LAA”) of a heart, the method comprising:
positioning a medical device coupled to a distal end of a delivery catheter within the LAA of the heart such that the medical device includes an occluder portion having a substantially non-permeable material that substantially blocks fluid from exiting the LAA;
injecting contrast fluid through the delivery catheter and through a hub of the medical device and into the LAA;
viewing the contrast fluid injected into the LAA with an imaging device; and
determining whether the medical device is properly positioned in the LAA upon viewing the contrast fluid in the LAA with the non-permeable material of the medical device substantially maintaining the contrast fluid in the LAA;
wherein the positioning the medical device comprises deploying the occluder portion of the medical device and, then, upon the occluder portion being in an expanded, deployed position, actuating an anchor portion of the medical device from a retracted position to an anchor deployed position.
2. The method according to claim 1 , further comprising advancing the medical device through a sheath in the vasculature and to the LAA of the heart.
3. The method according to claim 1 , wherein the injecting comprises injecting the contrast fluid through a fluid port in a handle coupled to a proximal end of the delivery catheter such that the contrast fluid flows through a lumen defined within and along a longitudinal length of the delivery catheter.
4. The method according to claim 1 , wherein the positioning comprises engaging the anchor portion of the medical device to tissue in the LAA.
5. The method according to claim 1 , wherein the injecting contrast fluid comprises injecting contrast fluid with an injection member.
6. The method according to claim 1 , wherein the injecting comprises injecting the fluid along a flow path that is defined at least through the hub of the medical device such that the contrast fluid exits a distal side of the hub of the medical device and into the LAA.
7. The method according to claim 1 , wherein the determining comprises determining whether there are gaps between an outer periphery of the medical device and the tissue of the LAA by viewing the contrast fluid.
8. The method according to claim 1 , further comprising re-positioning the medical device in the LAA upon determining contrast fluid is not being substantially maintained within the LAA with the medical device.
9. The method according to claim 1 , wherein the positioning the medical device comprises actuating the anchor portion of the medical device between the retracted position and the anchor deployed position such that a portion of the anchor portion is moveable through the hub of the medical device.
10. The method according to claim 9 , wherein the actuating the anchor portion comprises pivoting the anchor portion at a hinged coupling between the anchor portion and the occluder portion.
11. The method according to claim 9 , wherein the actuating the anchor portion comprises actuating actuator arms of the anchor portion substantially along an axis of the medical device.
12. The method according to claim 1 , wherein the positioning the medical device comprises substantially occluding the LAA such that the non-permeable material of the occluder portion comprises ePTFE.