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Cardiac support device with low friction delivery structuresCardiac support device with low friction delivery structures description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20080097146, Cardiac support device with low friction delivery structures. Brief Patent Description - Full Patent Description - Patent Application Claims
FIELD OF THE INVENTION [0001]The invention is a cardiac support device having low friction delivery-enhancing structures. BACKGROUND OF THE INVENTION [0002]Cardiac support devices are structures, sometimes referred to as jackets, that surround all or portions of a diseased heart. These devices are intended to treat chronic heart failure or other cardiac disease, which may be associated valvular dysfunction, by constraining expansion of the heart. They can be delivered and implanted using conventional cardiothoracic surgical techniques or minimally invasive surgical procedures. Devices of these types and associated delivery tools and methods are shown, for example, in the following U.S. patents, all of which are incorporated herein by reference in their entirety. TABLE-US-00001 Inventor Name Patent/Publication No. Alferness 5,702,343 Alferness et al. 6,123,662 Vanden Hoek et al. 6,293,906 Alferness et al. 6,482,146 Lau et al. 6,702,732 Cox et al. 6,730,016 Walsh et al. 6,902,522 Girard et al. 6,951,534 [0003]During the delivery procedures portions of the cardiac support devices sometimes encounter frictional resistance on the heart surface during placement. There is, therefore, a continuing need for improved methods and associated devices for use during the delivery of cardiac support devices. An invention of this type that can enhance the efficiency of the delivery procedure would be especially desirable. SUMMARY OF THE INVENTION [0004]The present invention is an improved cardiac support device that can be efficiently implanted within a patient. One embodiment of the invention includes a jacket for constraining cardiac expansion and one or more lubricious elements releasably secured with respect to an inside surface of the jacket. In another embodiment of the invention the lubricious elements include a plurality of strips of lubricious material releasably secured to a base portion of the jacket. BRIEF DESCRIPTION OF THE DRAWINGS [0005]FIG. 1 is an isometric side view of a cardiac support device in accordance with one embodiment of the present invention, with portions thereof broken away to illustrate the lubricious element assemblies. [0006]FIG. 2 is an isometric side view of the cardiac support device shown in FIG. 1, illustrating the side of the device opposite that shown in FIG. 1. [0007]FIGS. 3A and 3B are detailed illustrations of the opposite sides of the lubricious element assemblies shown in FIGS. 1 and 2, in an unreleased state. [0008]FIGS. 4A and 4B are illustrations of the opposite sides of the lubricious element assemblies shown in FIGS. 3A and 3B, in a partially released state. [0009]FIGS. 5A and 5B are illustrations of the opposite sides of the lubricious element assemblies shown in FIGS. 3A and 3B, in a fully released state. [0010]FIG. 6 is an isometric view of a delivery device in accordance with one embodiment of the invention, shown in a retracted state, that can be used to position the cardiac support device shown in FIG. 1 on a patient's heart. [0011]FIG. 7 is an isometric view of the delivery device shown in FIG. 6, shown in an extended state. [0012]FIG. 8 is an isometric view of the delivery device shown in FIGS. 6 and 7, shown in the retracted state with the cardiac support device shown in FIGS. 1 and 2 loaded thereon. [0013]FIG. 9 is an isometric view of the delivery device and loaded cardiac support device shown in FIG. 8, shown in the extended state. [0014]FIGS. 10A and 10B are detailed illustrations of the opposite sides of a portion of the delivery device and loaded cardiac support device shown in FIGS. 8 and 9, showing the distal end of the delivery device support member extending into a pocket in an upper section of a lubricious member. [0015]FIG. 11 is a detailed illustration of a portion of the delivery device and loaded cardiac support device shown in FIGS. 8 and 9, showing the handle of the delivery device and the lubricious members of the lubricious element assemblies releasably attached thereto. [0016]FIG. 12 is an isometric side view of a cardiac support device in accordance with a second embodiment of the invention. [0017]FIG. 13 is an isometric side view, with portions thereof broken away, of a cardiac support device in accordance with a third embodiment of the invention. [0018]FIG. 14 is an isometric view of a delivery device in accordance with another embodiment of the invention, shown in an extended state. 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