Dialysis Catheter
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0 Petitions
Accused Products
Abstract
A dialysis catheter comprising a catheter body having a proximal portion, a distal portion, a first longitudinally extending central lumen configured to deliver blood, and at least three longitudinally extending lumens positioned radially of the central lumen and configured to withdraw blood from a patient. At least one blood delivery opening is formed in the distal portion of the catheter body and in fluid communication with the first lumen and configured for passage of blood therethrough. At least three blood withdrawal openings are formed in the outer wall of the catheter body, wherein each of the openings is in fluid communication with one of the at least three lumens and is configured for passage of blood from a patient
113 Citations
47 Claims
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1-30. -30. (canceled)
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31. A system for placement of a catheter comprising:
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a) a catheter having a first lumen configured for blood delivery to a patient and having a first opening communicating with the first lumen, second and third independent lumens configured for blood withdrawal from the patient and a second opening communicating with the second lumen and a third opening communicating with the third lumen, the second and third openings positioned proximal of the first opening, at least a portion of the catheter having an outer diameter configured for insertion through a subcutaneous tissue tunnel, the catheter configured to receive a guidewire therethrough having a length with a distal end adapted and configured to extend into a right atrium, the catheter having a reduced diameter distal region; and b) a stiffening member received in the catheter such that the catheter with the stiffening member positioned therein is inserted into the patient, at least a portion of the stiffening member configured to pass through the subcutaneous tissue tunnel, the stiffening member having a proximal end opening and a distal end opening, the stiffening member received in the first lumen of the catheter and attached to the catheter at an attachment region such that the catheter with the stiffening member positioned therein is inserted into the patient, at least a portion of the stiffening member configured to pass through the subcutaneous tissue tunnel to extend for a distance under the skin, and a lumen extending along a length of the stiffener from the proximal end opening to the distal end opening and dimensioned to receive a the guidewire therein such that the catheter receives the guidewire as the guidewire extends through the stiffening member received in the catheter; and c) a trocar having a distal tip and connecting structure at a proximal end, the connecting structure removably connectable to the distal end of the catheter, the trocar being removable from the catheter prior to positioning of the stiffening member in the catheter. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38)
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39. A system for placement of a catheter comprising:
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a) a catheter having a first lumen configured for blood delivery to a patient and having a first opening communicating with the first lumen, a second independent lumen configured for blood withdrawal from the patient and having a second opening communicating with the second lumen, the second opening positioned proximal of the first opening, and a spacer positioned between the first and second openings and forming a raised surface between the first and second openings and extending from an outer surface of the catheter to contact a wall of a vessel lumen, wherein a transverse dimension of the catheter at the region of the spacer exceeds a transverse dimension of the catheter at the region at the first opening, at least a portion of the catheter having an outer diameter configured for insertion through a subcutaneous tissue tunnel, the catheter configured to receive a guidewire having a length with a distal end adapted and configured to extend into a right atrium and a proximal end which passes through the subcutaneous tissue tunnel, the catheter having a reduced diameter distal end; and b) a stiffening member received in the catheter such that the catheter with the stiffening member positioned therein is inserted into the patient, the stiffening member having a proximal end opening adjacent a region of attachment of the stiffener to the catheter and a distal end opening, the stiffening member received in the first lumen of the catheter and removably attached to the catheter at the attachment region such that the catheter with the stiffening member positioned therein is inserted into the patient, at least a portion of the stiffening member configured to pass through the subcutaneous tissue tunnel to extend for the distance under the skin, and a lumen extending along a length of the stiffener from the proximal end opening to the distal end opening and dimensioned to receive a guidewire therein. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47)
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Specification