Hemodialysis access device
First Claim
Patent Images
1. A vascular access device for hemodialysis, comprising:
- a pair of similar, generally conical, hollow shells, each shell having an entrance end and a smaller exit end defining a smoothly converging flow passage therebetween, and an axis extending between said ends;
means for connecting said pair of shells together along a common line of tangency, each of said shells being disposed with said axis at an acute angle relative to said common line of tangency;
a pair of self-sealing septa closing said entrance ends of said pair of shells; and
a pair of outlet tubes having corresponding first ends respectively extending from said exit ends of said pair of shells, said first ends of said pair of outlet tubes being spaced apart and disposed parallel to said line of tangency, such that when blood flows through each of said shells it follows said smoothly converging flow passage along said axis between said entrance end and said exit end of said shell, and undergoes a change in direction equal to said acute angle as it passes into said respective outlet tube.
5 Assignments
0 Petitions
Accused Products
Abstract
A vascular access device for hemodialysis comprises a pair of similar, generally conical, hollow shells, each shell having a relatively large entrance end and a relatively small exit end and an axis extending between the ends, the shells being connected together along a line of tangency. A pair of self-sealing septa close the entrance ends of the shells, and a pair of integral outlet tubes extend from the exit ends of the pair of shells, the distal ends of the outlet tubes being spaced apart and disposed parallel to the line of tangency.
-
Citations
19 Claims
-
1. A vascular access device for hemodialysis, comprising:
-
a pair of similar, generally conical, hollow shells, each shell having an entrance end and a smaller exit end defining a smoothly converging flow passage therebetween, and an axis extending between said ends; means for connecting said pair of shells together along a common line of tangency, each of said shells being disposed with said axis at an acute angle relative to said common line of tangency; a pair of self-sealing septa closing said entrance ends of said pair of shells; and a pair of outlet tubes having corresponding first ends respectively extending from said exit ends of said pair of shells, said first ends of said pair of outlet tubes being spaced apart and disposed parallel to said line of tangency, such that when blood flows through each of said shells it follows said smoothly converging flow passage along said axis between said entrance end and said exit end of said shell, and undergoes a change in direction equal to said acute angle as it passes into said respective outlet tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A vascular access device for hemodialysis comprising
a pair of similar generally conical hollow shells each shell having an entrance end and a smaller exit end; -
means for connecting the pair of shells together; a pair of self-sealing septa closing the entrance ends of said pair of shells; a pair of outlet tubes having corresponding first ends extending from the exit ends of said pair of shells, and thromboresistant covers covering the internal surfaces of said pair of shells and said pair of outlet tubes. - View Dependent Claims (15, 17, 18)
-
-
16. A vascular device, comprising:
-
a pair of similar generally conical, hollow shells, each shell having an entrance end and a smaller exit end defining a smoothly converging flow passage therebetween, and an axis extending between said entrance end and said exit end; means for connecting said pair of shells together along a common line of tangency, each of said shells being disposed with said axis at an acute angle relative to said common line of tangency; each shell having a self-sealing septum closing said shell entrance, said septum being composed of at least two layers of different durometer rubber-like materials; and a pair of outlet tubes having corresponding first ends respectively extending from said exit ends of said pair of shells said first ends of said pair of outlet tubes being spaced apart and disposed parallel to said line of tangency, such that when blood flows through each of said shells it follows said smoothly converging flow passage along said axis between said entrance end and said exit end of said shell, and undergoes a change in direction equal to said acute angle as it passes into said respective outlet tube. - View Dependent Claims (19)
-
Specification