Low friction delivery tool for a cardiac support device
A delivery device for efficiently delivering a cardiac support device of the type having a jacket. The device includes a body, a deployment mechanism and an actuating mechanism. The deployment mechanism is for releasable connection to a cardiac support device and movable within the jacket between retracted and extended states to drive the jacket between collapsed and open configurations. At least portions of the deployment mechanism within the jacket have a lubricious surface to substantially reduce friction between the jacket and a heart onto which the jacket is being positioned. The actuating mechanism moves the deployment mechanism between the retracted and extended states.
1. An assembly including a cardiac support device and delivery device, the assembly comprising:
a delivery device including:
a body,
a deployment mechanism movable between retracted and extended states with respect to the body, and
an actuating mechanism for moving the deployment mechanism between the retracted and extended states;
a cardiac support device releasably attached to the deployment mechanism, including a jacket having an inside surface, open base portion and an apex portion;
one or more lubricious elements releasably secured with respect to the inside surface of the jacket to reduce friction between the jacket and a heart when the cardiac support device is being positioned on the heart; and
removal structure operatively connected to the lubricious elements to enable removal of at least portions of the one or more lubricious elements from between the jacket and the heart after the cardiac support device is positioned, without removing the cardiac support device from the heart.
2. The assembly of claim 1 wherein the one or more lubricious elements includes a plurality of lubricious elements at spaced locations around the inside of the jacket.
3. The assembly of claim 2 wherein the one or more lubricious elements are releasably secured to the jacket at the base portion.
4. The assembly of claim 1 wherein the one or more lubricious elements includes a single unitary lubricious element.
5. The assembly of claim 1 wherein:
the one or more lubricious elements includes a plurality of lubricious elements at spaced locations around the inside of the jacket; and
the removal structure further includes one or more pull members connected to the lubricious elements.
6. The assembly of claim 5 wherein the pull members are formed from lubricious material.
7. The assembly of claim 5 wherein the pull members are releasably connected to the actuating mechanism of the delivery device.
8. The assembly of claim 1 wherein:
the jacket has an open apex; and
the deployment mechanism extends through the open apex.
9. The assembly of claim 8 wherein:
the one or more lubricious elements includes a plurality of lubricious elements at spaced locations around the inside of the jacket; and
the removal structure further includes one or more pull members connected to the lubricious elements and extending through the open apex of the jacket.
10. The assembly of claim 9 wherein the pull members are formed from lubricious material.
11. The assembly of claim 9 wherein portions of the pull members are connected to the actuating mechanism of the delivery device.
12. The assembly of claim 1 wherein at least portions of the deployment mechanism within the jacket have a lubricious surface.
13. The assembly of claim 1 wherein the removal structure includes one or more pull members connected to the one or more lubricious elements.
14. The assembly of claim 13 wherein:
the removal structure includes a weakened structure on the one or more lubricious elements; and
the pull members are connected to the lubricious elements at the weakened structure.
15. The assembly of claim 1 wherein the one or more lubricious elements are releasably secured to the jacket.
16. The assembly of claim 1 wherein the deployment mechanism includes a plurality of spaced-apart support members having a lubricious surface extending from the body,
17. The assembly of claim 16 wherein the support members extend from the body of the delivery device inside the jacket.
18. The assembly of claim 17 wherein the support members have sufficiently large lubricious surfaces to substantially reduce friction between the jacket and a heart onto which the jacket is being positioned to enable the efficient positioning of the jacket onto the heart.
19. The assembly of claim 18 wherein the support members have a width and a thickness, and wherein the width of at least substantial portions of the members is substantially greater than the thickness of the members.