Patent ID: 11957573
Assignee: BOSTON SCIENTIFIC MEDICAL DEVICE LIMITED
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A stent-valve for transcatheter implantation to replace a cardiac valve, the stent-valve being compressible to a compressed state for delivery, and expandable to an operative state for implantation, the stent-valve comprising a stent, a plurality of leaflets for defining a prosthetic valve, a paravalve seal for sealing against surrounding tissue, and a seal support, wherein the paravalve seal comprises a skirt, the skirt including an inner skirt disposed on an interior of the stent and an outer skirt disposed on an exterior of the stent, the inner skirt and outer skirt together defining a one or more pocket, wherein the outer skirt or portions thereof is biased radially outwardly to distend away from the body of the stent such that each pocket defines an open mouth facing towards an outlet end of the stent, and an end of the pocket opposite the mouth is closed, wherein the seal support comprises a plurality of cantilever elements fixed directly to the stent and biased radially outward from the stent and holding the mouth of the pocket open and radially outward away from the body of the stent, wherein the seal is configured such that blood flow in a reverse direction biases the seal pocket in an open state to obstruct such flow.