Adjustably stiffenable convertible catheter assembly
First Claim
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1. A catheter assembly for insertion within a body vessel, said catheter assembly capable of being converted between an “
- over-the-wire”
mode and a “
rapid-exchange-wire”
mode through a common lumen in said catheter assembly, comprising;
an elongated extruded flexible shaft having a proximal end and a distal end, said shaft having a balloon arranged about said distal end and a connector arranged at said proximal end;
a first and a second lumen arranged within said shaft, said second lumen being in fluid communication with the interior of said balloon for the enablement of inflation and deflation thereof; and
a third lumen extending between said proximal and distal ends of said shaft, said third lumen having means therewith to facilitate conversation of said catheter between an “
over-the-wire”
mode and a Vapid-exchange-wire”
mode with a guidewire arrangeable through at least a portion of said third lumen.
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Abstract
A stiffenable balloon catheter assembly capable of being converted from an “over-the-wire” mode with respect to a guidewire extending therethrough to a “rapid-exchange” mode with respect to a guidewire extending therethrough, and vice versa. The catheter has a plurality of lumens, one lumen however, having a side opening with an obstructable galp, the orientation of which, determines the utilization “mode” of the catheter assembly. Stiffening stylets may be adjustably locked into the lumens, depending upon the “mode”, to control the stiffness of the catheter assembly during its utilization within a patient.
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Citations
30 Claims
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1. A catheter assembly for insertion within a body vessel, said catheter assembly capable of being converted between an “
- over-the-wire”
mode and a “
rapid-exchange-wire”
mode through a common lumen in said catheter assembly, comprising;
an elongated extruded flexible shaft having a proximal end and a distal end, said shaft having a balloon arranged about said distal end and a connector arranged at said proximal end;
a first and a second lumen arranged within said shaft, said second lumen being in fluid communication with the interior of said balloon for the enablement of inflation and deflation thereof; and
a third lumen extending between said proximal and distal ends of said shaft, said third lumen having means therewith to facilitate conversation of said catheter between an “
over-the-wire”
mode and a Vapid-exchange-wire”
mode with a guidewire arrangeable through at least a portion of said third lumen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 30)
- over-the-wire”
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11. A dilatation catheter made from a shaft of extrudable flexible material having proximal and distal ends,
said catheter having an expandable elongated balloon disposed about its distal end; -
a first lumen disposed in said shaft, extending from said proximal end of said shaft, and having a closed end near the distal end of said shaft;
a third lumen disposed in said shaft comprising a tubular wall, extending from said proximal end of said shaft, through said balloon, said lumen having a terminal distal end which is open distally of said balloon;
a stiffening means disposed within said first lumen;
an obstructed opening arranged through said wall of said third lumen to provide access for a guidewire through the said lumen distally therepast. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A dilatation catheter from a shaft of extrudable flexible material having a distal and a proximal end, said having an elongated expandable balloon disposed about its distal end;
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a first lumen disposed in said catheter shaft, open at said proximal end, sand closed at said distal end, proximal of said balloon, said first lumen adapted to receive a stiffening mandrel therein;
a second lumen disposed in said catheter shaft, open at said proximal end, and having its distal end in fluid communication with said balloon; and
a third lumen disposed in said catheter shaft, said third lumen having a means for converting said dilatation catheter between an over-the-wire mode an da rapid-exchange-wire mode. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. A method of performing coronary angioplasty dilatation for opening a constriction in an artery of a patient, comprising the steps of:
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providing an elongated guidewire having distal and proximal ends and a dilatation catheter comprising a shaft having a distal and a proximal end, with an elongated expandable balloon disposed about its distal end, a first lumen with a closed distal end arranged therein proximal to said balloon, a second lumen in said shaft open at its proximal end and in fluid communication at its distal end with said balloon, and a third lumen extending the length of said shaft and open at each end thereof, said third lumen having means for converting said catheter between an overthe wire mode and a rapid-exchange mode, said means for converting said catheter comprising an obstructed opening through the side wall of said lumen proximal of said balloon, said first lumen having a stiffening mandrel therein, the distal end of which extends in said first lumen distal of said obstructed opening;
inserting said guidewire into the vessel system of a patient;
positioning said catheter over the proximal end of said guidewire so that said guide wire is in a sliding fit within said third lumen of said shaft;
advancing said guidewire proximally through said third lumen; and
bending said catheter shaft so to as lift said obstruction from said opening in the side of said third lumen to cause the proximal end of said guidewire to exit out the side of said third lumen and extend externally thereof to the proximal end of said catheter, while positioning said balloon within a vessel obstruction. - View Dependent Claims (27, 28)
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29. A balloon dilatation perfusion catheter, comprising:
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a balloon defining a balloon cavity therein;
a multi-lumen tubular member having a proximal end and a distal end extending through the balloon cavity;
a plurality of side openings arranged in the multi-lumen tubular member located both distal and proximal of the balloon and in fluid communication with one another via a first lumen in the multi-lumen tubular member, the first lumen extending from the proximal end of the multi-lumen tubular member through the tubular member to an end hole distal of the balloon;
a guide wire outlet opening in the multi-lumen tubular member proximal of the balloon in communication with the first lumen; and
a second lumen in the multi-lumen tubular member extending from the proximal end of the multi-lumen tubular member to the balloon and in the fluid communication with the balloon cavity wherein the first lumen is provided for receiving a guide wire or a temporary strengthening wire therein and the second lumen is provided for receiving a pressure fluid for inflating the balloon.
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Specification