Dialysis catheter
First Claim
Patent Images
1. A dialysis catheter comprising:
- a catheter body having a proximal portion, a distal portion, a reduced diameter distal tip, a first longitudinally extending lumen configured to deliver blood to a patient, and a second longitudinally extending lumens configured to withdraw blood from a patient;
a first blood delivery opening formed in the distal portion of the catheter body, the blood delivery opening being in fluid communication with the first lumen and configured for passage of blood therethrough;
a second blood withdrawal opening formed in the distal portion of the catheter body, the blood withdrawal opening being in fluid communication with the second lumen and configured for passage of blood from a patient, wherein the second opening is positioned proximally of the first opening;
a spacer extending from the catheter body to reduce contact of the catheter body with a vessel wall, wherein the spacer has a distal end and a proximal end, the distal end is positioned to terminate proximal of the reduced diameter distal tip of the catheter body and proximal of the first opening; and
a stiffening member removably positionable within the catheter;
wherein a proximal portion of the stiffening member has a series of threads for mounting the stiffening member to the catheter.
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Accused Products
Abstract
A dialysis catheter comprising a first portion having a first dianeter, 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.
233 Citations
12 Claims
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1. A dialysis catheter comprising:
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a catheter body having a proximal portion, a distal portion, a reduced diameter distal tip, a first longitudinally extending lumen configured to deliver blood to a patient, and a second longitudinally extending lumens configured to withdraw blood from a patient; a first blood delivery opening formed in the distal portion of the catheter body, the blood delivery opening being in fluid communication with the first lumen and configured for passage of blood therethrough; a second blood withdrawal opening formed in the distal portion of the catheter body, the blood withdrawal opening being in fluid communication with the second lumen and configured for passage of blood from a patient, wherein the second opening is positioned proximally of the first opening; a spacer extending from the catheter body to reduce contact of the catheter body with a vessel wall, wherein the spacer has a distal end and a proximal end, the distal end is positioned to terminate proximal of the reduced diameter distal tip of the catheter body and proximal of the first opening; and a stiffening member removably positionable within the catheter;
wherein a proximal portion of the stiffening member has a series of threads for mounting the stiffening member to the catheter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A dialysis catheter comprising:
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a catheter body having a proximal portion, a distal portion, a reduced diameter distal tip, a first longitudinally extending lumen configured to deliver blood to a patient, and a second longitudinally extending lumens configured to withdraw blood from a patient; a first blood delivery opening formed in the distal portion of the catheter body, the blood delivery opening being in fluid communication with the first lumen and configured for passage of blood therethrough; a second blood withdrawal opening formed in the distal portion of the catheter body, the blood withdrawal opening being in fluid communication with the second lumen and configured for passage of blood from a patient, wherein the second opening is positioned proximally of the first opening; a spacer extending from the catheter body to reduce contact of the catheter body with a vessel wall, wherein the spacer has a distal end and a proximal end, the distal end is positioned to terminate proximal of the reduced diameter distal tip of the catheter body and proximal of the first opening; and a stiffening member removably positionable within the catheter, wherein the stiffening member stretches the body and moves the spacer to a straightened position for insertion.
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12. A dialysis catheter comprising:
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a catheter body having a proximal portion, a distal portion, a reduced diameter distal tip, a first longitudinally extending lumen configured to deliver blood to a patient, and a second longitudinally extending lumens configured to withdraw blood from a patient; a first blood delivery opening formed in the distal portion of the catheter body, the blood delivery opening being in fluid communication with the first lumen and configured for passage of blood therethrough; a second blood withdrawal opening formed in the distal portion of the catheter body, the blood withdrawal opening being in fluid communication with the second lumen and configured for passage of blood from a patient, wherein the second opening is positioned proximally of the first opening; a spacer extending from the catheter body to reduce contact of the catheter body with a vessel wall, wherein the spacer has a distal end and a proximal end, the distal end is positioned to terminate proximal of the reduced diameter distal tip of the catheter body and proximal of the first opening; and a stiffening member removably positionable within the catheter, wherein the distal tip portion of the catheter includes a shoulder adapted to abut the stiffening member inserted through the first lumen.
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Specification