Valved Hemodialysis Catheter
First Claim
1. A medical catheter assembly, which comprises:
- an elongated catheter member defining a longitudinal axis and at least one lumen for passage of fluid, and having proximal and distal end regions; and
a valve disposed adjacent the distal end region of the catheter member, the valve adapted to move from a closed position to an open position in response to a predetermined vacuum pressure level within the at least one lumen to permit flow of the fluid through the valve and into the at least one lumen.
3 Assignments
0 Petitions
Accused Products
Abstract
A dialysis catheter includes an elongate catheter member having an outer wall member defining proximal and distal end regions and a longitudinal axis, and defining first and second longitudinal lumens. The outer member includes first and second ports in respective fluid communication with the first and second longitudinal lumens. The first opening and the first lumen define an inflow passage for removal of blood under vacuum for circulation within a hemodialysis machine. The second opening and the second longitudinal lumen define an outflow passage for return of the blood from the hemodialysis machine. A valve is disposed relative to the outer member proximal of the first port. The valve is adapted to move from a closed position to an open position in response to a predetermined vacuum pressure level realized within the first longitudinal lumen to permit flow of blood through the valve and into the first longitudinal lumen. The valve may be adapted to move to the open position in the event of an at least partial luminal occlusion within the first longitudinal lumen at locations distal of the valve.
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Citations
18 Claims
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1. A medical catheter assembly, which comprises:
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an elongated catheter member defining a longitudinal axis and at least one lumen for passage of fluid, and having proximal and distal end regions; and a valve disposed adjacent the distal end region of the catheter member, the valve adapted to move from a closed position to an open position in response to a predetermined vacuum pressure level within the at least one lumen to permit flow of the fluid through the valve and into the at least one lumen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A dialysis catheter, which comprises:
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an elongate catheter member including an outer wall member defining proximal and distal end regions and a longitudinal axis, and having first and second longitudinal lumens, the outer member including first and second ports in respective fluid communication with the first and second longitudinal lumens, the first port and the first lumen defining an inflow passage for removal of blood under vacuum for circulation within a hemodialysis machine, the second port and the second longitudinal lumen defining an outflow passage for return of the blood from the hemodialysis machine; and a valve disposed relative to the outer wall member proximal of the first port, the valve adapted to move from a closed position to an open position in response to a predetermined vacuum pressure level realized within the first longitudinal lumen to permit flow of blood through the valve and into the first longitudinal lumen. - View Dependent Claims (15, 16, 17, 18)
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Specification