Expandable cardiac access catheter
First Claim
1. An access catheter for crossing the wall of a tubular member of the body comprising;
- A. an elongated outer shaft having an outer shaft distal end, said outer shaft extending to a proximal region of said access catheter,B. an elongated inner shaft that extends within a lumen of said outer shaft, said inner shaft extending distally beyond said outer shaft distal end to an inner shaft distal end, said inner shaft extending proximally to said proximal region of said access catheter,C. an expandable open mesh structure positioned along a distal region of said access catheter, said expandable open mesh structure being attached to said outer shaft distal end at a first end of said expandable open mesh structure, and attached to said inner shaft distal end at a second end of said expandable open mesh structure,D. said expandable open mesh structure having an unexpanded configuration with a first diameter located midway between said first end and said second end of said expandable open mesh structure with said inner shaft positioned in a distal position relative to said outer shaft, said expandable open mesh structure having an expanded configuration with a second diameter larger than said first diameter, said second diameter being least three times larger than a diameter of said outer shaft, said second diameter having said inner shaft in a position with respect to said outer shaft that is more proximal than said distal position,E. a delivery tube that extends from said proximal region of said access catheter to said distal region of said access catheter, said delivery tube having a distal end that is bonded to said expandable open mesh structure to form an attachment along a perimeter of said expandable open mesh structure substantially midway between said first end and said second end of said expandable open mesh structure, wherein said distal end of said delivery tube is configured to form said attachment to said expandable open mesh structure in said expanded configuration and said nonexpanded configuration,F. said delivery tube having a delivery tube lumen that extends from said proximal region of said access catheter to said distal end of said delivery tube, said distal end of said delivery tube having a distal delivery opening that is directed radially outward away from a central axis of said access catheter with said expanded structure in said expanded configuration, wherein said delivery tube is configured to carry a dilator tube through said delivery tube lumen and extend out of said distal end of said delivery tube and into the tubular member of the body.
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Accused Products
Abstract
An access catheter provides access for a large bore stiff therapeutic catheter across the atrial septum from above via the superior vena cava. The access catheter has an expandable member that direct a delivery tube outwards in a radial direction to place a delivery tube opening into direct contact with the fossa ovalis. The braided expandable member allows blood flow to pass when it is expanded; the expandable member provides support against the opposite wall of the right atrium. A hollow dilator tube enters the delivery tube to form a tenting shape to the fossa and a guidewire is passed across the fossa ovalis. Standard procedure allows delivery of the therapeutic catheter over the guidewire.
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Citations
11 Claims
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1. An access catheter for crossing the wall of a tubular member of the body comprising;
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A. an elongated outer shaft having an outer shaft distal end, said outer shaft extending to a proximal region of said access catheter, B. an elongated inner shaft that extends within a lumen of said outer shaft, said inner shaft extending distally beyond said outer shaft distal end to an inner shaft distal end, said inner shaft extending proximally to said proximal region of said access catheter, C. an expandable open mesh structure positioned along a distal region of said access catheter, said expandable open mesh structure being attached to said outer shaft distal end at a first end of said expandable open mesh structure, and attached to said inner shaft distal end at a second end of said expandable open mesh structure, D. said expandable open mesh structure having an unexpanded configuration with a first diameter located midway between said first end and said second end of said expandable open mesh structure with said inner shaft positioned in a distal position relative to said outer shaft, said expandable open mesh structure having an expanded configuration with a second diameter larger than said first diameter, said second diameter being least three times larger than a diameter of said outer shaft, said second diameter having said inner shaft in a position with respect to said outer shaft that is more proximal than said distal position, E. a delivery tube that extends from said proximal region of said access catheter to said distal region of said access catheter, said delivery tube having a distal end that is bonded to said expandable open mesh structure to form an attachment along a perimeter of said expandable open mesh structure substantially midway between said first end and said second end of said expandable open mesh structure, wherein said distal end of said delivery tube is configured to form said attachment to said expandable open mesh structure in said expanded configuration and said nonexpanded configuration, F. said delivery tube having a delivery tube lumen that extends from said proximal region of said access catheter to said distal end of said delivery tube, said distal end of said delivery tube having a distal delivery opening that is directed radially outward away from a central axis of said access catheter with said expanded structure in said expanded configuration, wherein said delivery tube is configured to carry a dilator tube through said delivery tube lumen and extend out of said distal end of said delivery tube and into the tubular member of the body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An access catheter for crossing the wall of a tubular member of the body comprising;
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A. an elongated outer shaft having an outer shaft distal end, said outer shaft extending to a proximal region of said access catheter, B. an elongated inner shaft that extends within a lumen of said outer shaft, said inner shaft extending distally beyond said outer shaft distal end to an inner shaft distal end, said inner shaft extending from said inner distal shaft distal end to said proximal region of said access catheter, C. an expandable open mesh structure positioned along a distal region of said access catheter, said expandable open mesh structure being attached to said outer shaft distal end at a first end of said expandable open mesh structure, and said expandable member being attached to said inner shaft distal end at a second end of said expandable open mesh structure, D. said expandable open mesh structure having an expanded configuration with an expanded large diameter that is larger than a diameter of said outer shaft, said expanded large diameter being generated from movement of said inner shaft in a proximal direction with respect to said outer shaft, E. a delivery tube that extends from said proximal region of said access catheter to a distal end of said delivery tube, said distal end of said delivery tube being bonded to a said expandable open mesh structure to form an attachment located substantially midway between said first end and said second end of said expandable open mesh structure, said delivery tube having a distal delivery opening that is directed radially outward away from a central axis of said access catheter with said expandable open mesh structure in said expanded configuration, wherein said delivery tube is configured to carry a catheter through a lumen of said delivery tube and extend out of said distal end of said delivery tube and into the tubular member of the body.
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11. An access catheter for crossing the wall of a tubular member of the body comprising;
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A. an elongated outer shaft having an outer shaft distal end, said outer shaft extending to a proximal region of said access catheter, B. an elongated inner shaft that extends within a lumen of said outer shaft, said inner shaft extending distally beyond said outer shaft distal end to an inner shaft distal end, said inner shaft extending from said inner distal shaft distal end to said proximal region of said access catheter, C. an expandable open mesh structure positioned along a distal region of said access catheter, said expandable open mesh structure being attached to said outer shaft distal end at a first end of said expandable open mesh structure, and said expandable member being attached to said inner shaft distal end at a second end of said expandable open mesh structure, D. said expandable open mesh structure having an expanded configuration with an expanded diameter that is larger than an unexpanded diameter of an unexpanded configuration of said expandable open mesh structure, said expanded diameter being generated from movement of said inner shaft in a proximal direction with respect to said outer shaft, E. a delivery tube that extends from said proximal region of said access catheter to a distal end of said delivery tube, said distal end of said delivery tube being bonded to a said expandable open mesh structure at an attachment site located between said first end and said second end of said expandable open mesh structure, said delivery tube having a distal delivery opening that is directed radially outward away from a central axis of said access catheter in said expanded configuration wherein said distal end of said delivery tube is configured to be bonded to said expandable open mesh structure in said expanded configuration and in said unexpanded configuration wherein said delivery tube is configured to carry a catheter through a lumen of said delivery tube and extend out of said distal end of said delivery tube and into the tubular member of the body.
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Specification