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 structure positioned along a distal region of said access catheter, said expandable member being attached to said outer shaft distal end at a first end of said expandable structure, and attached to said inner shaft distal end at a second end of said expandable structure,D. said expandable structure having an unexpanded configuration with a first diameter located midway between said first end and said second end of said expandable structure with said inner shaft positioned in a distal position relative to said outer shaft, said expandable 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 proximal position with respect to said outer shaft,D. 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 attached to an attachment site located along a perimeter of said expandable structure, said attachment site being substantially midway between said first end and said second end of said expandable structure, 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.
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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
18 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 structure positioned along a distal region of said access catheter, said expandable member being attached to said outer shaft distal end at a first end of said expandable structure, and attached to said inner shaft distal end at a second end of said expandable structure, D. said expandable structure having an unexpanded configuration with a first diameter located midway between said first end and said second end of said expandable structure with said inner shaft positioned in a distal position relative to said outer shaft, said expandable 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 proximal position with respect to said outer shaft, D. 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 attached to an attachment site located along a perimeter of said expandable structure, said attachment site being substantially midway between said first end and said second end of said expandable structure, 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. 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 structure positioned along a distal region of said access catheter, said expandable member being attached to said outer shaft distal end at a first end of said expandable structure, and said expandable member being attached to said inner shaft distal end at a second end of said expandable structure, D. said expandable structure having an expanded configuration with an expanded diameter that is at least three times 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 attached to a said expandable structure at an attachment site located substantially midway between said first end and said second end of said expandable structure, said delivery tube having a distal delivery opening that is directed radially outward away from a central axis of said access catheter in an expanded configuration.
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13. The method of use for an access catheter for crossing the atrial septum from the right atrium into the left atrium for placing a therapeutic device across the mitral annulus comprising the steps,
A. providing an access catheter having an expandable structure attached at a distal end of said access catheter, said expandable structure having a first diameter in a nonexpanded configuration, B. positioning said expandable structure such that a central region located midway between a distal end and a proximal end of said expandable structure is able to be located within a right atrium, said expandable structure having a delivery tube attached to an attachment site located along a perimeter of said central region, said delivery tube having a distal delivery opening, said distal delivery opening being directed outward in a radial direction, C. activating said expandable structure to expand said expandable structure to a second diameter larger than said first diameter thereby able to place said distal delivery opening into contact with an atrial septum and able to place an opposite side of said expandable member located 180 degrees around said perimeter of said central region opposed to a wall of the right atrium.
Specification