Folding patterns and loading funnel for improved transcatheter valve loading forces
A loading assembly for crimping and loading a prosthetic heart valve into a delivery device includes a loading base, a base funnel, and a compression member. The loading base has a support and a body extending from the support with a recess defined within the body. The recess is configured to receive a substantial portion of the annulus section of the heart valve in an at least partially collapsed condition. The base funnel is configured to be coupled to the loading base and to at least partially collapse the annulus section of the heart valve as it is inserted into the recess in the loading base. The compression member is configured to be coupled to the loading base with the heart valve inserted in the recess for further collapsing the heart valve and loading it into the delivery device.
1. A method for loading a prosthetic heart valve into a delivery device, the method comprising:
positioning a first compression member having an orifice against a loading base;
inserting an annulus section of the prosthetic heart valve through the first compression member and through the orifice so as to at least partially collapse the annulus section of the prosthetic valve;
positioning the at least partially collapsed annulus section in the loading base;
at least partially collapsing an aortic section of the prosthetic heart valve while the at least partially collapsed annulus section is in the loading base; and
loading the prosthetic heart valve into the delivery device by loading the at least partially collapsed aortic section into the delivery device without passing the prosthetic heart valve through the loading base.
2. The method according to claim 1 , further comprising further collapsing the partially collapsed aortic section prior to loading the prosthetic heart valve into the delivery device.
3. The method according to claim 1 , further comprising moving the first compression member away from the loading base after positioning the at least partially collapsed annulus section in the loading base.
4. The method according to claim 1 , wherein the step of at least partially collapsing the aortic section includes positioning a second compression member against the loading base and over the partially collapsed aortic section so as to pass the at least partially collapsed aortic section through the second compression member.
5. The method according to claim 4 , wherein the loading step includes loading the prosthetic heart valve into the delivery device through the second compression member.
6. The method according to claim 1 , further comprising removing the first compression member before at least partially collapsing an aortic section of the prosthetic heart valve.
7. The method according to claim 1 , wherein the first compression member includes a plurality of ridges configured to urge fabrics of an inner cuff of the prosthetic heart valve to fold radially inward when the annulus section of the prosthetic heart valve is inserted through the first compression member.
8. The method according to claim 1 , wherein the first compression member includes a plurality of springlike fingers configured to urge fabrics of an inner cuff of the prosthetic heart valve to fold radially inward when the annulus section of the prosthetic heart valve is inserted through the first compression member.