Prosthesis with in-wall modulation
First Claim
1. A prosthetic member comprisinga prosthesis wall having at least first, second and third portions along a wall thickness,said first portion including a porous inner portion extending continuously along an axissaid second portion being contiguous to said first portion and forming a barrier impenetrable to cell growth and being permeable with a water entry pressure higher than said first portionsaid third portion lying over said second portion and extending as a continuous body along said axissaid first, second and third portions being coalesced together to form said wall having cellularly penetrable first and third portions and said second portion modulates cellular penetration of said first and third portions.
2 Assignments
0 Petitions
Accused Products
Abstract
The wall of a prosthesis has a region which modulates communication through the porosity of the wall. The prosthesis is unitary, but may be assembled in successive bodies which are coalesced, so that the porous microstructure changes distinctly at stages through the thickness dimension of the wall. One embodiment is formed entirely of fluoropolymer, and has at least one surface adapted to support tissue regeneration and ingrowth. The modulation region is a stratum of high water entry pressure that reduces pulsatile hydraulic pressure transmission, or locally alters fluid-born-distribution of biological material through the wall and allows more natural gradients for tissue regeneration and growth in the outer region of the wall.
87 Citations
11 Claims
-
1. A prosthetic member comprising
a prosthesis wall having at least first, second and third portions along a wall thickness, said first portion including a porous inner portion extending continuously along an axis said second portion being contiguous to said first portion and forming a barrier impenetrable to cell growth and being permeable with a water entry pressure higher than said first portion said third portion lying over said second portion and extending as a continuous body along said axis said first, second and third portions being coalesced together to form said wall having cellularly penetrable first and third portions and said second portion modulates cellular penetration of said first and third portions.
-
10. A prosthetic member comprising
a prosthesis wall formed entirely of fluoropolymer having at least first, second and third portions along a wall thickness, said first portion including a porous inner section extending continuously along an axis said second portion being contiguous to said first portion and forming a stratum which has a permeability effective for modulating hydrostatic pressure said third portion overlying said second portion and including a porous section extending as a continuous body along said axis said first, second and third portions being coalesced together to form said wall such that the wall has a cellularly penetrable surface and said second portion modulates fluid communication through the wall while preventing cellular growth in said second portion.
-
11. A prosthetic member comprising
an implantable body including a prosthetic wall having first, second and third portions said first portion extending over an area and having a penetrable surface conducive to cellular ingrowth said second portion having a low permeability that allows passage of gas and fluid at a controlled rate, and said third portion having a penetrable surface conducive to cellular ingrowth, said first, second and third portions being arranged along a thickness dimension and coalesced together to form said prosthetic wall as an integral structure of said implantable body to control cellular growth in said first and third portions through modulation by said second portion of transport and fluid communication in the wall.
Specification