Dialysis catheter
First Claim
1. A dialysis catheter comprising a first portion having a first diameter, an elongated distal portion having a second diameter smaller than the first diameter, and a transition region between the first portion and distal portion, a first longitudinally extending central lumen having an outer wall forming its periphery and configured to deliver blood and terminating in an opening in the distal portion, and at least two independent longitudinally extending lumens positioned radially of the first lumen, the at least two lumens positioned between the central lumen outer wall and an inner wall of the catheter such that the central lumen outer wall is spaced radially inwardly from the inner wall of the catheter, the at least two lumens configured to withdraw blood from a patient and each terminating in a longitudinally directed opening in the transition region.
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Accused Products
Abstract
A dialysis catheter comprising a first portion having a first diameter, an elongated distal portion having a second diameter smaller than the first diameter, and a transition region between the first portion and distal portion. A first longitudinally extending central lumen configured to deliver blood terminates in an opening in the distal portion. At least two independent longitudinally extending lumens are positioned radially of the first lumen, configured to withdraw blood from a patient, and terminate in a longitudinally directed opening in the transition portion.
261 Citations
26 Claims
- 1. A dialysis catheter comprising a first portion having a first diameter, an elongated distal portion having a second diameter smaller than the first diameter, and a transition region between the first portion and distal portion, a first longitudinally extending central lumen having an outer wall forming its periphery and configured to deliver blood and terminating in an opening in the distal portion, and at least two independent longitudinally extending lumens positioned radially of the first lumen, the at least two lumens positioned between the central lumen outer wall and an inner wall of the catheter such that the central lumen outer wall is spaced radially inwardly from the inner wall of the catheter, the at least two lumens configured to withdraw blood from a patient and each terminating in a longitudinally directed opening in the transition region.
- 10. A dialysis catheter comprising a first portion having a first diameter, an elongated distal portion having a second diameter smaller than the first diameter, and a transition region between the first portion and distal portion, a first longitudinally extending central lumen configured to deliver blood terminating in an opening in the distal portion, and at least two independent longitudinally extending lumens positioned radially of the first lumen, the at least two lumens configured to withdraw blood from a patient and each terminating in a longitudinally directed opening in the transition region and a stiffening member removably mountable within one of the catheter lumens.
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16. A catheter for delivering and withdrawing blood from a patient'"'"'s body, the catheter comprising:
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a catheter body having an outer wall, an elongated distal tip portion of reduced diameter, a transition region proximal of the distal tip portion, a first return lumen extending from a proximal portion of the catheter body through the distal tip portion and dimensioned so a guidewire can extend therethrough, and first and second longitudinally extending intake lumens independent of the first lumen and each terminating in an opening in the transition region; and a stiffening insert positioned in the distal tip portion, the stiffening insert having a first stiffness greater than a second stiffness of the distal tip portion, the stiffening insert having a lumen therethrough communicating with the first return lumen. - View Dependent Claims (17, 18)
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- 19. An apparatus for creating a subcutaneous tissue tunnel to enable subsequent insertion of a dialysis catheter through the tunnel, the apparatus comprising a handle and an elongated body extending from the handle and having a distal portion and a proximal portion, the distal portion having a distal tip configured to dilate tissue, the proximal portion having a connection structure removably connectable to the handle and further subsequently removably connectable to the dialysis catheter after detachment from the handle and removal of the handle, wherein after separation of the elongated body from the handle after insertion of the apparatus through the tissue tunnel, the connection structure is then attached to the dialysis catheter for passage of the dialysis catheter through the tissue tunnel.
- 23. An apparatus for creating a subcutaneous tissue tunnel to enable subsequent insertion of a dialysis catheter through the tunnel, the apparatus comprising a handle and an elongated body extending from the handle and having a distal portion and a proximal portion, the distal portion having a distal tip configured to dilate tissue, the proximal portion having a first type of connection structure removably connectable to the handle and a second different type of connection structure removably connectable to the dialysis catheter after detachment and removal of the handle, wherein after separation of the first connection structure from the handle to separate the elongated body from the handle and removal of the handle after insertion of the apparatus through the tissue tunnel, the second connection structure is attached to the dialysis catheter for passage of the dialysis catheter through the tissue tunnel.
Specification