Adventitial fabric reinforced porous prosthetic graft
First Claim
Patent Images
1. A vascular graft prosthesis having a bi-layer wall structure configured to optimize mechanical compliance to a host vessel, comprising:
- an inner material shaped as a tube structure which allows uninterrupted cellular growth; and
an outer adventitial material connected to the inner tube which allows for cellular in-growth, said adventitial material being characterized by a non-linear elastic response.
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Accused Products
Abstract
A vascular prosthesis is constructed of an inner porous tube which allows uninterrupted cellular growth and which is connected to an adventitial sock surrounding the porous tube. The adventitial sock produces a non-linear elastic response to stress-strain on the prosthesis to optimize compliance and prevent over dilatation.
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Citations
104 Claims
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1. A vascular graft prosthesis having a bi-layer wall structure configured to optimize mechanical compliance to a host vessel, comprising:
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an inner material shaped as a tube structure which allows uninterrupted cellular growth; and
an outer adventitial material connected to the inner tube which allows for cellular in-growth, said adventitial material being characterized by a non-linear elastic response. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A vascular graft prosthesis having a wall structure configured to optimize mechanical compliance, diameter, non-linear stiffening characteristics and wall compression to a host vessel, comprising:
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an inner material shaped as a tubular structure which allows cellular growth; and
an outer adventitial material positioned around the inner material, said adventitial material being characterized by a non-linear elastic response. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
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51. A vascular graft prosthesis having a bi-layer wall structure configured to optimize mechanical compliance to a host vessel, comprising:
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an inner porous tube comprising a polymer structure having a circumferential wall; and
interconnecting generally uniformly shaped pores in the tube wall;
wherein porosity is optimized to maximize uninterrupted cellular growth; and
an outer adventitial material connected to the inner porous tube, said adventitial material being characterized by a non-linear elastic response. - View Dependent Claims (52, 53, 54)
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55. A vascular graft prosthesis having a bi-layer wall structure configured to optimize compliance to a host vessel, comprising:
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an inner tubular shaped material structurally configured to promote uninterrupted cellular growth; and
an outer adventitial material contiguous to the inner material, said adventitial material comprising a fabric-reinforcing sock having properties that increase stiffness with strain and being characterized by a non-linear elastic response.
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56. A vascular graft prosthesis having a bi-layer wall structure configured to optimize mechanical compliance to a host vessel, comprising:
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an inner porous tube which allows uninterrupted cellular growth; and
an outer material connected to the inner porous tube, said adventitial material comprising a non-linear anisotropic fabric-reinforcing sock having properties that increase stiffness with strain and being characterized by a non-linear elastic response. - View Dependent Claims (57, 58)
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59. A vascular graft prosthesis having a wall structure configured to optimize mechanical compliance, diameter, non-linear stiffening characteristics and wall compression to a host vessel, comprising:
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an inner material configured to allow cellular ingrowth; and
an outer adventitial material positioned around the inner material, said adventitial material being characterized by a non-linear elastic response, so that the graft prosthesis matches the compliance values of the host vessel.
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60. A vascular graft prosthesis having a wall structure configured to optimize mechanical compliance, diameter, non-linear stiffening characteristics and wall compression to a host vessel, comprising:
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an inner material configured to facilitate cellular ingrowth; and
an outer adventitial material positioned around the inner material, said adventitial material being characterized by a non-linear elastic response and a structure to allow uninterrupted tissue ingrowth into said inner material, so that the graft prosthesis matches the compliance values of the host vessel.
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61. A vascular graft prosthesis having a wall structure configured to optimize mechanical compliance, diameter, non-linear stiffening characteristics and wall compression to a host vessel, comprising:
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an inner material configured to facilitate cellular ingrowth; and
an outer adventitial material positioned around the inner material, said adventitial material being characterized by a configurable non-linear elastic response and a structure to allow uninterrupted tissue ingrowth into said inner material so that the graft prosthesis provides compliance values, which match those of the host vessel at the graft location.
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62. A vascular graft prosthesis having a wall structure configured to approximate the natural compliance in a host vessel wall, comprising:
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an inner material configured to facilitate cellular ingrowth; and
a fabric reinforcing material in contact with the inner material, said fabric reinforcing material having a structure which allows virtually uninterrupted tissue ingrowth into said inner material and which has a non-linear elastic response to stress which approximates the natural compliance values of the host vessel.
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63. A vascular graft prosthesis having a wall structure configured to substantially match the natural compliance values to a host vessel, comprising:
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an inner material configured to facilitate cellular ingrowth; and
an outer adventitial material positioned around the inner material and having a thickness of between about 0.020-1.0 mm, said adventitial material having a fabric-like structure which allows substantially uninterrupted tissue ingrowth into said inner material and which has an increased stiffness with strain which regulates the prosthesis shape so as to substantially match the compliance values of the host vessel.
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64. A vascular graft prosthesis having a wall structure configurable to desired compliance values appropriate for a host vessel, comprising:
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an inner material configured to facilitate cellular ingrowth; and
an outer adventitial material positioned around the inner material and having a thickness of between about 0.020-1.0 mm, said adventitial material having a fabric-like structure which forms pores having an average diameter in a range of about 100 μ
m-3 mm and which allows uninterrupted tissue ingrowth into said inner material;
the adventitial material further having a characteristic of increased stiffness with strain which allows for configuring the compliance values of the graft prosthesis to those which are appropriate for a host vessel.
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65. A vascular graft prosthesis having a bi-layer wall structure configured to optimize mechanical compliance to a host vessel, comprising:
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an inner porous tube comprising a polymer structure having a circumferential wall; and
interconnecting uniformly shaped pores in the tube wall;
wherein porosity is optimized to maximize uninterrupted cellular growth; and
an adventitial material connected to the inner porous tube, said adventitial material comprising a non-linear anisotropic fabric-reinforcing sock having properties that increase stiffness with strain and being characterized by a non-linear elastic response. - View Dependent Claims (66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90)
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91. A computer implemented method of designing a vascular graft prosthesis having desired mechanical characteristics, which mimic the characteristics of natural vessels, comprising the steps of:
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entering parameters of fabric graft material and graft data into an encoding processor;
implementing a plurality of computer implemented optimization algorithms which implement a numerical composite graft model analysis and numerical composite circumferential and longitudinal tensile model analyses on a number of parameters; and
forming new data generations using the optimization algorithms performing iterations until desired mechanical characteristics are achieved.
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92. A method of manufacturing a vascular graft prosthesis having a bi-layer wall structure configured to optimize mechanical compliance to a host vessel, comprising the steps of:
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forming an inner graft structure of a first material; and
attaching an adventitial material to the inner graft structure, wherein the adventitial material is more elastic and less stiff than the first material of the inner graft structure and is characterized by a non-linear elastic response. - View Dependent Claims (93)
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94. A method of manufacturing a vascular graft prosthesis having a bi-layer wall structure configured to optimize mechanical compliance to a host vessel, comprising the steps of:
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performing computer implemented steps of designing a vascular graft prosthesis including entering parameters of fabric material and graft data into an encoding processor, executing a plurality of computer implemented calculations and models on a plurality of parameters, and forming new data generations using the calculations performing iterations until a desired characteristic is met;
using the outcome of the design steps to form an inner material structure which allows uninterrupted cellular growth; and
thensurrounding the inner material structure in contacting relation with an outer adventitial material, wherein the outer adventitial material is characterized by a non-linear elastic response to achieve specific compliance values.
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95. A method of designing a vascular graft prosthesis having a bi-layer wall structure configured to optimize mechanical compliance to a host vessel, comprising the steps of:
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performing computer implemented steps using entering parameters of fabric material and graft data in an encoding processor, executing a plurality of computer implemented calculations and models on a plurality of parameters, and forming new data generations using the calculations performing iterations until a desired compliance value characteristic is met for an outer adventitial portion of a graft prosthesis; and
using the outcome of the computer implemented steps to form an inner material structure of the graft which allows uninterrupted cellular growth and which when formed used inside of the outer adventitial portion provides a graft prosthesis which demonstrates desired characteristics of mechanical compliance for use in a specific host vessel.
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96. A method of designing an inner layer of a vascular graft prosthesis having a bi-layer wall structure configured to optimize mechanical compliance to a host vessel, comprising the steps of:
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performing computer implemented steps using entering parameters of fabric material and graft data in an encoding processor, executing a plurality of computer implemented calculations and models on a plurality of parameters, and forming new data generations using the calculations performing iterations until a desired compliance value characteristic is met for an outer adventitial portion of a graft prosthesis; and
using the outcome of the computer implemented steps to form an inner material structure of the graft which allows uninterrupted cellular growth and which when formed used inside of the outer adventitial portion provides a graft prosthesis which demonstrates desired characteristics of mechanical compliance for use in a specific host vessel.
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97. A method of manufacturing a vascular graft prosthesis having a bi-layer wall structure configured to optimize mechanical compliance to a host vessel, comprising the steps of:
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performing computer implemented steps of designing a vascular graft prosthesis including entering parameters of fabric and graft data in an encoding processor, executing a plurality of computer implemented calculations and models on a plurality of parameters, and forming new data generations using the calculations performing iterations until a desired compliance value characteristic is met for an outer adventitial portion of the graft;
using the outcome of the design steps to form an inner material structure which allows uninterrupted cellular growth and;
attaching the outer adventitial portion to the inner material, wherein the adventitial material is characterized by a non-linear elastic response to achieve specific compliance values.
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98. A method of manufacturing a vascular graft prosthesis having a bi-layer wall structure configured to optimize mechanical compliance to a host vessel, comprising the steps of:
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implementing computer implemented steps of designing a vascular graft prosthesis including entering parameters of fabric and graft data into an encoding processor, implementing a plurality of computer implemented optimization algorithms, which implement graft numerical and mathematical model analyses and numerical and mathematical circumferential and longitudinal tensile model analyses on a number of parameters; and
forming new data generations using numerical algorithms performing iterations until desired mechanical compliance characteristics are met;
using the outcome of the design steps to form a tube structure having a circumferential wall with interconnecting pores in the tube wall;
wherein porosity is optimized to maximize uninterrupted cellular growth; and
thenattaching an outer adventitial material to the tube structure, wherein the adventitial material is characterized by a non-linear anisotropic fabric-reinforcing sock having properties that increase stiffness with strain and being characterized by a non-linear elastic response to achieve specific compliance values.
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99. A vascular graft prosthesis having a wall structure configured to optimize mechanical compliance, diameter and wall compression and to prevent over-dilatation of the prosthesis to a host vessel, comprising:
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an inner material shaped as a tubular structure which allows cellular growth; and
an outer adventitial material positioned around the inner material, said adventitial material being characterized by a non-linear elastic response having a β
value, which is matched to the optimal β
value for that portion of the natural host tissue. - View Dependent Claims (100)
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101. A method of manufacturing a vascular graft prosthesis having a bi-layer wall structure configured to optimize mechanical compliance to a host vessel, comprising the steps of:
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forming an inner graft structure;
determining the optimal β
value for the graft at the location of the host vessel;
manufacturing an outer adventitial material having a characteristic non-linear elastic response which allows the graft prosthesis to have a β
value that substantially matches the optimal β
value; and
surrounding the inner graft structure with the outer adventitial material.
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102. A method of manufacturing a vascular graft prosthesis having a bi-layer wall structure configured to optimize mechanical compliance to a host vessel, comprising the steps of:
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determining the optimal β
value for the graft at the location of the host vessel;
manufacturing an outer adventitial material having a characteristic non-linear elastic response, which allows the graft prosthesis to have a β
value that substantially matches the optimal β
value;
forming an inner graft structure; and
surrounding the inner graft structure with the outer adventitial material.
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103. A method of designing a vascular graft prosthesis having a bi-layer wall structure configured to optimize mechanical compliance to a host vessel, comprising the steps of:
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performing computer implemented steps of designing a vascular graft prosthesis including entering parameters of fabric and graft data in an encoding processor which includes time dependent features replicating tissue ingrowth mechanical impact on the fabric, executing a plurality of computer implemented calculations and models on a plurality of parameters, and forming new data generations using the calculations performing iterations until a desired compliance value characteristic is met for an outer adventitial portion of the graft;
using the outcome of the design steps to form an inner material structure which allows uninterrupted cellular growth and;
attaching the outer adventitial portion to the inner material, wherein the adventitial material is characterized by a non-linear elastic response to achieve specific compliance values.
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104. A method of making a vascular graft prosthesis having a multi-layer wall structure configured to optimize mechanical compliance to a host vessel, comprising the steps of:
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performing computer implemented steps of designing a vascular graft prosthesis including entering parameters of fabric and graft data in an encoding processor which includes time dependent features replicating tissue ingrowth mechanical impact on the fabric and degradation of the fabric and graft while tissue ingrowth occurs, executing a plurality of computer implemented calculations and models on a plurality of parameters, and forming new data generations using the calculations performing iterations until a desired compliance value characteristic is met for an adventitial portion of the graft;
using the outcome of the design steps to form an inner material structure which allows uninterrupted cellular growth and;
attaching the adventitial portion to the inner material, wherein the adventitial material is characterized by a non-linear elastic response to achieve specific compliance values.
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Specification