In one general aspect, a cuff for attachment to a heart includes an attachment component configured to engage a blood pump to attach the cuff to the blood pump and a sewing ring for attachment to the heart. The sewing ring is coupled to the attachment component, and the attachment component and the
In one general aspect, a cuff for attachment to a heart includes an attachment component configured to engage a blood pump to attach the cuff to the blood pump and a sewing ring for attachment to the heart. The sewing ring is coupled to the attachment component, and the attachment component and the sewing ring each define a central opening configured to admit an inflow cannula of a blood pump. The sewing ring comprises a member that provides rigidity to flatten a portion of a myocardium of the heart when the cuff is attached to the heart.
대표청구항▼
1. A cuff for attachment to a heart, the cuff comprising: an attachment component configured to engage a blood pump to attach the cuff to the blood pump; anda sewing ring for attachment to the heart, the sewing ring being coupled to the attachment component, the attachment component and the sewing r
1. A cuff for attachment to a heart, the cuff comprising: an attachment component configured to engage a blood pump to attach the cuff to the blood pump; anda sewing ring for attachment to the heart, the sewing ring being coupled to the attachment component, the attachment component and the sewing ring each defining a central opening configured to admit an inflow cannula of a blood pump, wherein: the sewing ring comprises two or more disc-shaped layers of fabric,the sewing ring comprises an insert disposed between the disc-shaped layers, the insert being more rigid than the disc-shaped layers,the insert has an inner perimeter, an outer perimeter, and a plurality of extensions that extend radially inward between the outer perimeter and the inner perimeter, andthe sewing ring comprises a member that provides rigidity to flatten a portion of a myocardium of the heart when the cuff is attached to the heart. 2. The cuff of claim 1, wherein the two or more disc-shaped layers are formed of a felt, a mesh, or a woven material. 3. The cuff of claim 1, wherein the two or more disc-shaped layers are formed of polytetrafluoroethylene, polyester, or polyethylene terephthalate. 4. The cuff of claim 1, wherein the two or more disc-shaped layers are formed of polytetrafluoroethylene felt. 5. The cuff of claim 1, wherein the two or more disc-shaped layers are attached to each other by sutures or an adhesive. 6. The cuff of claim 1, wherein each of the two or more disc-shaped layers has a thickness between approximately 1.3 millimeters and 2.3 millimeters, and a maximum water permeability of between approximately 450 ml/cm2/min and 650 ml/cm2/min. 7. The cuff of claim 1, wherein the insert is formed of polyether ether ketone, titanium, a titanium alloy, a cobalt chromium alloy, or a shape-memory polymer. 8. The cuff of claim 1, wherein the insert is covered in silicone. 9. The cuff of claim 1, wherein the insert is a lattice or web that defines a central opening of the insert that admits the inflow cannula of the blood pump. 10. The cuff of claim 1, wherein the insert is formed of a resilient material. 11. The cuff of claim 1, wherein the insert is formed of a nickel-titanium alloy. 12. A cuff for attachment to a heart, the cuff comprising: an attachment component configured to engage a blood pump to attach the cuff to the blood pump; anda sewing ring for attachment to the heart, the sewing ring being coupled to the attachment component, the attachment component and the sewing ring each defining a central opening configured to admit an inflow cannula of a blood pump, wherein: the sewing ring comprises two or more disc-shaped layers of fabric,the sewing ring comprises an insert disposed between the disc-shaped layers, the insert being more rigid than the disc-shaped layers,the insert is formed of a nickel-titanium alloy, andthe sewing ring comprises a member that provides rigidity to flatten a portion of a myocardium of the heart when the cuff is attached to the heart. 13. A cuff for attachment to a heart, the cuff comprising: an attachment component configured to engage a blood pump to attach the cuff to the blood pump; anda sewing ring for attachment to the heart, the sewing ring being coupled to the attachment component, the attachment component and the sewing ring each defining a central opening configured to admit an inflow cannula of a blood pump, wherein: the sewing ring comprises two or more disc-shaped layers of fabric,the sewing ring comprises an insert disposed between the disc-shaped layers, the insert being more rigid than the disc-shaped layers,the insert defines a plurality of windows that define areas configured to receive sutures such that the sutures extend through the insert without penetrating material that forms the insert, andthe sewing ring comprises a member that provides rigidity to flatten a portion of a myocardium of the heart when the cuff is attached to the heart.
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