Steerable balloon catheter
First Claim
Patent Images
1. A steerable balloon catheter having a deflectable tip which comprises:
- an inner elongated flexible hollow tubing having proximal and distal portions;
a flexible helical coil having proximal and distal ends, the proximal end of said helical coil is attached to the distal portion of the inner elongated flexible hollow tubing;
an elongated deflection member having proximal and distal portions and being slidably disposed within said inner elongated flexible hollow tubing and within said helical coil, the distal portion of said deflection member being flattened to form a deflection ribbon which extends in a plane;
a retaining ribbon having proximal and distal ends, the proximal end of the retaining ribbon is attached to the distal portion of the inner elongated flexible hollow tubing and the retaining ribbon is oriented to extend in a plane which is generally parallel to the plane of the deflection ribbon;
an attachment member engaging the distal end of the helical coil, the distal portion of the deflection member, and the distal end of the retaining ribbon so that longitudinal movement of the deflection member in a distal direction causes the distal end of the helical coil to be deflected in one direction and longitudinal movement of the deflection member in a proximal direction causes the distal end of the helical coil to deflect in another opposite direction;
the attachment member takes the form of a rounded bead which contacts the distal end of the helical coil to define a curved surface at the distal end of the coil;
the deflection ribbon engages the rounded bead at a location offset from the center of the curved surface of the rounded bead;
the distal end of the retaining ribbon engages the rounded bead at a location offset from the center of the curved surface of the rounded bead;
said deflection ribbon and said retaining ribbon being joined together to form a generally U-shaped configuration;
an outer elongated flexible tubing surrounding the inner elongated hollow tubing so as to define a passageway between the outer tubing and the inner elongated flexible hollow tubing; and
an inflatable balloon mounted on the outer flexible tubing and communicating with the passageway between the outer tubing and the inner hollow tubing.
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Accused Products
Abstract
A steerable balloon catheter including a balloon catheter supported by a steerable guidewire having a deflectable distal tip. The guidewire comprises a longitudinal hypotube and a spring coil attached to the distal end of the hypotube and includes a longitudinally movable deflection member which is attached to the distal end of the spring coil and a tip retaining member which extends from the distal end of the hypotube to the distal end of the spring coil for providing very precise deflection of the distal tip of the balloon catheter.
93 Citations
30 Claims
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1. A steerable balloon catheter having a deflectable tip which comprises:
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an inner elongated flexible hollow tubing having proximal and distal portions; a flexible helical coil having proximal and distal ends, the proximal end of said helical coil is attached to the distal portion of the inner elongated flexible hollow tubing; an elongated deflection member having proximal and distal portions and being slidably disposed within said inner elongated flexible hollow tubing and within said helical coil, the distal portion of said deflection member being flattened to form a deflection ribbon which extends in a plane; a retaining ribbon having proximal and distal ends, the proximal end of the retaining ribbon is attached to the distal portion of the inner elongated flexible hollow tubing and the retaining ribbon is oriented to extend in a plane which is generally parallel to the plane of the deflection ribbon; an attachment member engaging the distal end of the helical coil, the distal portion of the deflection member, and the distal end of the retaining ribbon so that longitudinal movement of the deflection member in a distal direction causes the distal end of the helical coil to be deflected in one direction and longitudinal movement of the deflection member in a proximal direction causes the distal end of the helical coil to deflect in another opposite direction; the attachment member takes the form of a rounded bead which contacts the distal end of the helical coil to define a curved surface at the distal end of the coil; the deflection ribbon engages the rounded bead at a location offset from the center of the curved surface of the rounded bead; the distal end of the retaining ribbon engages the rounded bead at a location offset from the center of the curved surface of the rounded bead; said deflection ribbon and said retaining ribbon being joined together to form a generally U-shaped configuration; an outer elongated flexible tubing surrounding the inner elongated hollow tubing so as to define a passageway between the outer tubing and the inner elongated flexible hollow tubing; and an inflatable balloon mounted on the outer flexible tubing and communicating with the passageway between the outer tubing and the inner hollow tubing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A steerable balloon catheter having a deflectable tip which comprises:
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an inner elongated flexible hollow tubing having proximal and distal portions; a flexible helical coil having proximal and distal ends, the proximal end of said helical coil is attached to the distal portion of the inner elongated flexible hollow tubing; an elongated deflection member having proximal and distal portions and being slidably disposed within said hollow tubing and within said helical coil, the distal portion of said deflection member being tapered; an elongated retaining member having proximal and distal ends, the proximal end of the retaining member is attached to the distal portion of the flexible hollow tubing; an attachment member engaging the distal end of the helical coil, the deflection member, and the distal end of the retaining member so that longitudinal movement of the deflection member in a distal direction causes the distal end of the helical coil to be deflected in one direction and longitudinal movement of the deflection member in a proximal direction causes the distal end of the helical coil to deflect in an opposite direction; said retaining member being preshaped into an arcuate configuration to thereby cause the flexible helical coil to be normally biased into a curved shape; an outer elongated flexible tubing surrounding the inner elongated hollow tubing so as to define a passageway between the outer elongated flexible tubing and the inner elongated hollow tubing; and
,an inflatable balloon mounted on the outer elongated tubing and the communicating with the passageway between the outer tubing and the inner tubing. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. A steerable balloon catheter having a deflectable tip which comprises:
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a first elongated flexible hollow tubing having proximal and distal portions; a flexible helical coil having proximal and distal ends, the proximal end of said helical coil is attached to the distal portion of the first elongated flexible hollow tubing; an elongated deflection member comprised of proximal and distal portions and being slidably disposed within said hollow tubing and within said helical coil, the proximal portion of the deflection member being of a cylindrical cross section and the distal portion of said deflection member takes the form a deflection ribbon which extends in a plane; a retaining ribbon having proximal and distal ends, the proximal end of the retaining ribbon is attached to the distal portion of the first elongated flexible hollow tubing and the retaining ribbon is oriented to extend in a plane which is generally parallel to the plane of the deflection ribbon; an attachment member engaging the distal end of the helical coil, the distal portion of the deflection member, and the distal end of the retaining ribbon so that longitudinal movement of the deflection member in a distal direction causes the distal end of the helical coil to be deflected in one direction and longitudinal movement of the deflection member in a proximal direction causes the distal end of the helical coil to deflect in another opposite direction; wherein the attachment member takes the form of a rounded bead which contacts the distal end of the helical coil to define a curved surface at the distal end of the coil, and the deflection ribbon engages the rounded bead at a location offset from the center of the rounded surface of the rounded bead; and wherein the distal end of the retaining ribbon engages the rounded bead at a location offset from the center of the rounded surface of the rounded bead, said retaining ribbon being offset from the center of the rounded surface in an opposite direction from the offset location of the deflection ribbon;
said deflection ribbon and retaining ribbon being joined to each other within the rounded bead;a second elongated flexible tubing attached to and supported by said first elongated flexible hollow tubing, said second tubing having an inflation lumen; and
an inflatable balloon mounted on said second elongated flexible tubing and communicating with the lumen of said second elongated tubing. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
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Specification