Valvuloplasty device with satellite expansion means
First Claim
1. A balloon catheter for valvuloplasty comprising:
- a catheter portion having a plurality of flow passages therein;
primary expandable means coupled to a source of pressurized liquid;
auxiliary expandable means coupled to a source of pressurized liquid;
said auxiliary expandable means mounted circumferentially adjacent said primary expandable means with the axis of said primary and auxiliary expandable being displaced and capable of being expanded under control of said liquid supply separately and independently of the expansion of said primary expandable means and in substantially parallel relation to the primary expandable means said auxiliary expandable means being displaced laterally from the axis of said primary expandable means upon expansion of said primary expandable means.
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Abstract
The present invention provides a valvuloplasty device having a plurality of expandable chambers for valvuloplasty such that the arrangements and disposition of the expandable chambers conforms to the anatomy of the valve to be treated, thereby increasing the likelihood that inflation of the balloons will restore the valve more closely to its original anatomy and function. The expandable chambers can be expanded in various combinations or sequences in order to provide improved results from the treatment. The present invention also provides a method of performing valvuloplasty in which a plurality of expandable chambers having a fixed geometric relationship to each other are positioned within the valve to be treated and the expandable chambers are expanded in combination and/or in sequence to provide improved anatomical structure and function of the valve treated by the method.
1018 Citations
24 Claims
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1. A balloon catheter for valvuloplasty comprising:
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a catheter portion having a plurality of flow passages therein; primary expandable means coupled to a source of pressurized liquid; auxiliary expandable means coupled to a source of pressurized liquid; said auxiliary expandable means mounted circumferentially adjacent said primary expandable means with the axis of said primary and auxiliary expandable being displaced and capable of being expanded under control of said liquid supply separately and independently of the expansion of said primary expandable means and in substantially parallel relation to the primary expandable means said auxiliary expandable means being displaced laterally from the axis of said primary expandable means upon expansion of said primary expandable means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 15)
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12. A balloon catheter valvuloplasty device comprising:
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a central catheter portion; a plurality of liquid glow paths in said central section; a guide passage in said central catheter portion; first expandable means connected to said central catheter portion and communicating with one of said liquid flow paths to expand upon introduction of pressurized liquid therein; auxiliary expandable means comprising a plurality of separately expandable chambers mounted circumferentially adjacent to and in substantially parallel relation to the primary expandable means; each of said separately expandable chambers communicating with a separate fluid path in said central section; said first expandable means including an enlarged end section adapted to expand larger than the area of a valve to be treated to position and anchor the device during a valvuloplasty proceeding; at least one of said separately expandable chambers comprising a plurality of partition means; said partition means shaping said separately expandable chamber to produce a relatively narrow rounded edge thereof; and guide means extending through said central means and through said first expandable means for housing a guide wire for positioning of said catheter.
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13. A balloon catheter valvuloplasty device comprising:
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a primary expandable chamber; at least one satellite expandable chamber circumferentially adjacent and in substantially parallel relation to the primary expandable means with the axis of said primry and auxiliary expandable means being displaced; a central catheter portion having flow passage means therein; said flow passage means communication with a source of pressurized fluid for expanding said primary and satellite expandable chambers; said primary and satellite expandable chambers communicating with said flow passage means; said primary and satellite expandable means in fixed position with relation to each other; and said auxiliary expandable means being displaced laterally from the axis of said primary expandable means upon expansion of said primary expandable means. - View Dependent Claims (14)
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16. A method of performing valvuloplasty on a valve associated with the heart comprising the steps of:
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placing a valvuloplasty device adjacent a valve to be treated by valvuloplasty said valvuloplasty device having a primary expandable chamber and at least one auxiliary expandable chamber mounted circumferentially adjacent to said primary expandable chamber and adapted to expand parallel to the primary expandable chamber; a positoning the valvuloplasty device across the plane of the valve; expanding expandable chamber and at least one auxiliary expandable chamber associated with said valvuloplasty device of flex or open the segments of the valve to be treated; contracting the expandable chambers; and removing the valvuloplasty device from the valve. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. A method of performing valvuloplasty on a valve associated with the heart comprising the steps of:
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placing a valvuloplasty device adjacent a valve to be treated by valvuloplasty by guiding the valvuloplasty device along a guide passing through the valve to be treated said valvuloplasty device having a plurality expandable chamber and at least one auxiliary expandable chamber mounted circumferentially adjacent said primary expandable chamber and adapted to expand parallel to the primary expandable chamber; axially positioning the valvuloplasty device across the plane of the valve by means of inflating an enlarged forward section of the primary expansion chamber; rotationally positioning the valvuloplasty device within the plane of the valve by at least partially expanding an auxiliary expandable chamber before inflating the primary expandable chamber; and expanding the primary and auxiliary expandable chamber in sequence to flex or open the segments of the valve to be treated by sequentially expanding one of the auxiliary expandable chambers or the primary chamber prior to the other chamber to drive the auxiliary expandable chamber into the commissures or narrow portions of the valve to be expanded when both primary and auxiliary balloons are expanded.
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Specification