Tubular prosthesis for vascular reconstructive surgery and process for preparing same
First Claim
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1. A process for producing a tubular prosthesis for vascular reconstructive surgery from a selected blood vessel of the human umbilical cord, wherein said umbilical cord comprises blood vessels and umbilical cord tissue, said blood vessels comprising a vein and two arteries, the process comprising the steps of:
- a. cleansing the umbilical cord;
b. separating the two arteries and vein from the umbilical cord tissue and from one another;
c. removing umbilical cord tissue from the outer surface of said selected blood vessel;
d. establishing and maintaining a minimum bore dimension of said selected blood vessel by inserting within the bore of said selected blood vessel a mandrel having an outer diameter essentially equal to said minimum bore dimension of said selected blood vessel and a length substantially equal to the length of said selected blood vessel, said selected blood vessel being open at least at one end; and
e. treating said selected blood vessel by applying tanning agent under cyclic pressure to the outer surface of said selected blood vessel such that said selected blood vessel contracts down to said outer diameter of said mandrel.
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Accused Products
Abstract
Arteries and veins of umbilical cords are treated by processes described, fitted with a biodegradable mesh support and used as tubular prosthesis for vascular reconstructive surgery.
116 Citations
20 Claims
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1. A process for producing a tubular prosthesis for vascular reconstructive surgery from a selected blood vessel of the human umbilical cord, wherein said umbilical cord comprises blood vessels and umbilical cord tissue, said blood vessels comprising a vein and two arteries, the process comprising the steps of:
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a. cleansing the umbilical cord; b. separating the two arteries and vein from the umbilical cord tissue and from one another; c. removing umbilical cord tissue from the outer surface of said selected blood vessel; d. establishing and maintaining a minimum bore dimension of said selected blood vessel by inserting within the bore of said selected blood vessel a mandrel having an outer diameter essentially equal to said minimum bore dimension of said selected blood vessel and a length substantially equal to the length of said selected blood vessel, said selected blood vessel being open at least at one end; and e. treating said selected blood vessel by applying tanning agent under cyclic pressure to the outer surface of said selected blood vessel such that said selected blood vessel contracts down to said outer diameter of said mandrel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A process for producing a tubular prosthesis for vascular reconstructive surgery from a selected blood vessel of the human umbilical cord, wherein said umbilical cord comprises blood vessels and umbilical cord tissue, said blood vessels comprising a vein and two arteries, the process comprising the steps of:
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a. cleansing the umbilical cord; b. separating the two arteries and vein from the umbilical cord tissue and from one another; c. removing umbilical cord tissue from the outer surface of said selected blood vessel; d. establishing and maintaining a minimum bore dimension of said selected blood vessel by inserting within the bore of said selected blood vessel a mandrel having an outer diameter essentially equal to said minimum bore dimension of said selected blood vessel; e. positioning and maintaining tanning fluid around the selected blood vessel to be tanned; and f. treating said selected blood vessel by applying tanning agent under cyclic pressure to the outer surface of said selected blood vessel such that said selected blood vessel contracts down to said outer diameter of said mandrel.
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14. A process for producing a tubular prosthesis for vascular reconstructive surgery from a selected blood vessel of the human umbilical cord, wherein said umbilical cord comprises blood vessels and umbilical cord tissue, said blood vessels comprising a vein and two arteries, the process comprising the steps of:
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a. cleansing the umbilical cord; b. separating the two arteries and vein from the umbilical cord tissue and from one another; c. removing umbilical cord tissue from the outer surface of said selected blood vessel; d. establishing and maintaining a predetermined inner diameter of said selected blood vessel along its entire circumferential inner surface; and e. maintaining said predetermined inner diameter while applying tanning agent under cyclic pressure to the outer surface of said selected blood vessel such that said selected blood vessel contracts down to said outer diameter of said mandrel. - View Dependent Claims (15)
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16. A process for tanning the outer surface of a selected blood vessel of an umbilical cord under cyclic pressure, said tanned vessel having utility as a prosthesis for vascular reconstructive surgery, comprising the steps of:
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a. establishing and maintaining a predetermined inner dimension of said selected blood vessel along its entire circumference; and b. treating said selected blood vessel by applying tanning agent under cyclic pressure to the outer surface of said selected blood vessel.
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17. A process for producing a tubular prosthesis for vascular reconstructive surgery from a selected blood vessel of the human umbilical cord, wherein said umbilical cord comprises blood vessels and umbilical cord tissue, said blood vessels comprising a vein and two arteries, the process comprising the steps of:
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a. cleansing the umbilical cord; b. separating the two arteries and vein from the umbilical cord tissue and from one another; c. removing umbilical cord tissue from the outer surface of said selected blood vessel; d. establishing and maintaining a minimum bore dimension of said selected blood vessel by inserting within the bore of said selected blood vessel a mandrel having an outer diameter essentially equal to said minimum bore dimension of said selected blood vessel and a length substantially equal to the length of said selected blood vessel, said selected blood vessel being open at both ends; and e. treating said selected blood vessel by applying tanning agent under cyclic pressure to the outer surface of said selected blood vessel such that said selected blood vessel contracts down to said outer diameter of said mandrel.
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18. A process for producing a tubular prosthesis for vascular reconstructive surgery form a selected blood vessel of the human umbilical cord, wherein said umbilical cord comprises blood vessels and umbilical cord tissue, said blood vessels comprising a vein and two arteries, the process comprising the steps of:
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a. cleansing the umbilical cord; b. separating the two arteries and vein from the umbilical cord tissue and from one another; c. removing umbilical cord tissue from the outer surface of said selected blood vessel; d. establishing and maintaining a minimum bore dimension of said selected blood vessel by inserting within the bore of said selected blood vessel a mandrel having an outer diameter essentially equal to said minimum bore dimension of said selected blood vessel and a length substantially equal to the length of said selected blood vessel, said selected blood vessel being open at least at one end; and e. treating said selected blood vessel by applying tanning agent under cyclic pressure to the outer surface of said selected blood vessel such that said selected blood vessel contracts down to said outer diameter of said mandrel, wherein said cyclic pressure to which said selected blood vessel is subjected is greater than the physiologic range when said selected blood vessel is implanted. - View Dependent Claims (19)
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20. A process for producing a tubular prosthesis for vascular reconstructive surgery from a selected blood vessel of the human umbilical cord, wherein said umbilical cord comprises blood vessels and umbilical cord tissue, said blood vessels comprising a vein and two arteries, the process comprising the steps of:
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a. cleansing the umbilical cord; b. separating the two arteries and vein from the umbilical cord tissue and from one another; c. removing umbilical cord tissue from the outer surface of said selected blood vessel; d. establishing and maintaining a minimum bore dimension of said selected blood vessel by inserting within the bore of said selected blood vessel a mandrel having an outer diameter essentially equal to said minimum bore dimension of said selected blood vessel and a length substantially equal to the length of said selected blood vessel, said selected blood vessel being open at both ends; and e. treating said selected blood vessel by applying tanning agent under cyclic pressure to the outer surface of said selected blood vessel such that said selected blood vessel contracts down to said outer diameter of said mandrel, wherein said cyclic pressure to which said selected blood vessel is subjected is greater than the physiologic range when said selected blood vessel is implanted.
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Specification