Device and method for vascular access
First Claim
1. An apparatus for providing needle access to a blood pathway comprising:
- a graft conduit for attachment to an artery;
a catheter conduit for insertion in a vein; and
a self-sealing element, comprising;
a wall structure defining, at least in part, an internal passageway in fluid communication with said graft and catheter conduits so that, in use, said conduits and said passageway can form said blood pathway;
said wall structure being formed of a tubular material that can be punctured by a needle to permit needle access to said passageway and re-seals upon withdrawal of said needle, wherein said self-sealing element is formed a wall of the catheter conduit or located between the graft conduit and catheter conduit.
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Accused Products
Abstract
Vascular access systems for performing hemodialysis are disclosed. The vascular access system contemplates a catheter section adapted for insertion into a vein and a graft section adapted for attachment to an artery. The catheter section may have metal or polymer wall reinforcements that allow the use of thin-walled, small outer diameter conduits for the vascular access system. One or more of the adhered, embedded or bonded conduit reinforcement structures may be removable without significant damage to the conduit sections to facilitate attachment of the sections, or to a connector between the sections. Various self-sealing materials are provided for use in the vascular access system, as well as temporary access sites and flow control/sensor systems.
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Citations
95 Claims
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1. An apparatus for providing needle access to a blood pathway comprising:
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a graft conduit for attachment to an artery;
a catheter conduit for insertion in a vein; and
a self-sealing element, comprising;
a wall structure defining, at least in part, an internal passageway in fluid communication with said graft and catheter conduits so that, in use, said conduits and said passageway can form said blood pathway;
said wall structure being formed of a tubular material that can be punctured by a needle to permit needle access to said passageway and re-seals upon withdrawal of said needle, wherein said self-sealing element is formed a wall of the catheter conduit or located between the graft conduit and catheter conduit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An implantable graft for providing needle access to a blood pathway shortly after implantation, said apparatus comprising:
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an elongate, generally tubular body having a graft portion for attachment to an artery and a catheter portion having an end and being adapted for at least a section of said catheter portion to be inserted into a vein with said end distanced from the vein insertion location;
a zone for repeated needle access formed of a generally tubular material which seals with respect to blood after withdrawal of the needle, said zone being formed in said catheter portion. - View Dependent Claims (13, 14, 15, 16, 17)
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18. An apparatus for providing needle access to a blood pathway comprising:
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a graft conduit for attachment to an artery;
a catheter conduit for insertion in a vein; and
a self-sealing element, comprising;
a flexible wall structure defining, at least in part, a flexible internal passageway with a freely flexible longitudinal axis in fluid communication with said graft and catheter conduits so that, in use, said conduits and said flexible passageway can form said blood pathway;
said wall structure being formed of a material that can be punctured by a needle to permit needle access to said passageway and re-seals upon withdrawal of said needle.
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- 19. An arteriovenous graft comprising a separate graft portion for attachment to an artery and attachable catheter portion for placement in a vein, said graft portion and said catheter portion comprising a tubular structure having an internal passageway for conducting, in use, blood from said artery to said vein, and at least two lumens in fluid communication with said passageway and further comprising a structure for interrupting said fluid communication to provide temporary access to said passageway.
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35. A method for treating a patient, comprising:
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providing a first and second conduit of a vascular access system;
accessing a vein at a first access site;
inserting the first conduit of the vascular access system into the vein;
forming a subcutaneous pathway between the first access site and an intermediate access site;
accessing an artery at a second access site;
attaching the second conduit to an artery through the second access site; and
positioning the first conduit and second conduit of the vascular access system in the subcutaneous pathway. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42)
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43. A method for treating a patient, comprising:
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providing a means for providing a blood pathway between a vein and an artery;
accessing a vein at a first access site;
inserting the means for providing a blood pathway between a vein and an artery into the vein;
forming a subcutaneous pathway between the first access site and a second access site;
attaching the means for providing a blood pathway between a vein and an artery at the second access site; and
positioning the means for providing a blood pathway between a vein and an artery in the subcutaneous pathway.
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44. A device for treating a patient, comprising:
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a graft conduit comprising a first end, a second end, a lumen therebetween, an outer wall surface, an outer diameter, a lumen wall surface, and an inner diameter, a catheter conduit comprising a first end, a second end, a lumen therebetween, an outer wall surface, an outer diameter, and a lumen wall surface, an inner diameter, and a filament on or at least partially embedded at the outer wall surface, the filament being peelable from the outer wall surface; and
a conduit connector having a first end, a second end, a lumen therebetween, wherein the first end of the conduit connector is adapted to join the second end of the graft conduit, and the second end of the conduit connector is adapted to joint the first end of the catheter conduit. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55)
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56. A device for treating a patient, comprising:
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a graft conduit comprising a first end, and a second end, wherein the second end comprises an elastic material, a catheter conduit comprising a first end, a second end; and
a conduit connector having a first end, a second end, wherein the first end of the conduit connector is adapted to join the second end of the graft conduit;
wherein said elastic material of the graft conduit provide a snug fit with the first end of the conduit connector. - View Dependent Claims (57, 58)
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- 59. A device for treating a patient, comprising a catheter component with a lumen and at least one radio-opaque marker about a distal end of the catheter component, wherein the at least one radio-opaque marker comprising two or more layers of one or more radio-opaque materials having crush resilience to maintain patency of the lumen at the distal end.
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61. A device for treating a patient, comprising a catheter component with a lumen and at least one multi-layer radio-opaque marker about a distal end of the catheter component, wherein the at least one multi-layer radio-opaque marker exhibits improved crush-resilience compared to a single-layer radio-opaque marker having the same radio-opacity to maintain patency of the lumen at the distal end
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62. An arteriovenous graft, comprising:
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a generally tubular body having an outer wall and comprising;
a graft section adapted for attachment to an artery;
a catheter section adapted to be inserted at least partially into a vein; and
a strain relief element extending around at least a portion of said tubular body and comprising a generally tubular member mounted directly or indirectly to said outer wall and having at least one end formed into two or more flexural sections by two or more slots extending inwardly from said end between said flexural sections. - View Dependent Claims (63, 64, 65, 66)
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- 67. A device for relieving strain on a flexible tube subject to kinking, said device comprising a generally tubular body having a first end and a second end, said second end having a periphery, comprising a plurality of flexible flap elements distributed around said periphery for distributing strain.
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69. A device for delivering a catheter, comprising:
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a shaft comprising a proximal end, distal end and a guidewire lumen therebetween, a distal end outer diameter and a collapsible distal tip, and a catheter section comprising a first end a second end, and a catheter lumen therebetween;
wherein the collapsible distal tip has an expanded configuration comprising tapered surface and a reduced configuration adapted to move within the catheter lumen. - View Dependent Claims (70, 71, 72, 73)
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74. A method for inserting a catheter, comprising:
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providing a catheter insert comprising an insert shaft with a guidewire lumen, and a collapsible distal tapered tip having an expanded configuration and a reduced configuration;
providing a catheter having a first end a second end, and a lumen therebetween;
inserting the catheter insert into the lumen of the catheter;
expanding the collapsible distal tapered tip to its expanded configuration;
passing the distal tapered tip of the catheter insert into a vein;
positioning the catheter and catheter insert into the vein; and
collapsing the collapsible distal tapered tip to its reduced configuration. - View Dependent Claims (75, 76, 77)
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78. A device for treating a patient, comprising:
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an implantable arteriovenous graft, comprising a vein insertion end, an artery attachment end, a tubular wall and a lumen therebetween; and
a flow rate control element for reversibly changing a net cross-sectional surface area of the lumen. - View Dependent Claims (79, 80, 81, 82, 83, 84, 85)
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86. A method for performing dialysis, comprising:
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providing an implantable arteriovenous graft, comprising a vein insertion end, an artery attachment end, a tubular wall, a lumen therebetween, and a flow rate control element for reversibly changing net blood flow rate in the lumen;
increasing the net blood flow rate during at least portion of a dialysis treatment; and
reducing the net blood flow rate between dialysis treatments.
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87. A device for treating a patient, comprising:
an implantable arteriovenous graft conduit, comprising a vein insertion end, an artery attachment end, a tubular wall and a lumen therebetween, and a flow sensor system at least partially embedded within the tubular wall. - View Dependent Claims (88, 89, 90, 91, 92, 93, 94, 95)
Specification