Ventricular cuff
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.
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; and
a 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, and
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.
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/cm 2 /min and 650 ml/cm 2 /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; and
a 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, and
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.
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; and
a 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, and
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.