Balloon dilatation catheter having dual sealing plugs
First Claim
1. A catheter comprising:
- a tube having a through passage extending from a proximal end to a distal end;
a guiding member having a proximal end and a distal end, with the guiding member extending distally beyond the distal end of the tube;
an inflatable balloon member extending around a section of the guiding member and having an interior in fluid communication with the through passage of the tube, the balloon member including a proximal end sealably connected to the distal end of the tube and a distal end extending coaxially about a portion of the guiding member so as to allow rotational movement of the guiding member relative to the balloon member; and
a sealing means associated with the guiding member and cooperable with the distal end of the balloon member to substantially restrict the flow of fluid through the distal end of the balloon member, the sealing means including a first sealing plug secured tot he guiding member immediately, proximally of the distal end of the balloon member, and a second sealing plug secured to the guiding member immediately, distally of the distal end of the balloon member.
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Accused Products
Abstract
A non-over-the-wire catheter for use in angioplasty including a core wire which extends distally beyond a distal end of a tubular member. The tubular member defines an interior passage which is in fluid communication with a distal interior passage of a waist tube that extends about the core wire. An inflatable balloon member extends about the core wire and is in fluid communication with the distal interior passage of the waist tube. A distal end of the balloon member extends coaxially about a portion of the core wire so as to allow rotational movement of the core wire relative to the balloon member. First and second sealing plugs are secured to the core wire proximal to and distal of, respectively, the distal end of the balloon member. The sealing plugs provide resistance to flow of pressurized balloon fluid to minimize leakage through the distal end of the balloon member. The first and second sealing plugs also prevent the waist tube and balloon member from being displaced axially relative to the core wire.
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Citations
16 Claims
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1. A catheter comprising:
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a tube having a through passage extending from a proximal end to a distal end; a guiding member having a proximal end and a distal end, with the guiding member extending distally beyond the distal end of the tube; an inflatable balloon member extending around a section of the guiding member and having an interior in fluid communication with the through passage of the tube, the balloon member including a proximal end sealably connected to the distal end of the tube and a distal end extending coaxially about a portion of the guiding member so as to allow rotational movement of the guiding member relative to the balloon member; and a sealing means associated with the guiding member and cooperable with the distal end of the balloon member to substantially restrict the flow of fluid through the distal end of the balloon member, the sealing means including a first sealing plug secured tot he guiding member immediately, proximally of the distal end of the balloon member, and a second sealing plug secured to the guiding member immediately, distally of the distal end of the balloon member. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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3. The catheter of claim wherein an inside diameter of the distal end of the balloon member is greater than the diameter of the portion of the guiding member to define a minimal cylindrical gap between the portion of the guiding member and the distal end of the balloon member, the cylindrical gap allowing rotational movement of the guiding member relative to the balloon member while providing resistance to flow of pressurized balloon fluid to minimize leakage of balloon fluid through the distal end of the balloon member.
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15. A non-over-the-wire angioplasty catheter which is adapted to be inserted into a patient'"'"'s vascular system, the catheter comprising:
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an elongate flexible tubular member having an interior passage extending form a proximal end to a distal end; a core wire having a smaller diameter than the tubular member and having a proximal end and a distal end, the core wire having its proximal end secured tot he tubular member adjacent to the distal end thereof, with the core wire extending distally beyond the distal end of the tubular member; a flexible waist tube having a proximal end and a distal end, the waist tube having its proximal end sealably connected to the tubular member adjacent to the distal end thereof, the waist tube extending distally beyond the distal end of the tubular member about the core wire to define a distal interior passage in fluid communication with the interior passage of the tubular member, with the distal end of the waist tube terminating proximally of the distal end of the core wire; an inflatable balloon member extending around a section of the core wire and having an interior in fluid communication with the distal interior passage of the waist tube, the balloon member including a proximal end sealably connected to the distal end of the waist tube and a distal end extending coaxially about a portion of the core wire so as to allow rotational movement of the core wire relative to the balloon member and thereby prevent twisting of the balloon member as the catheter is maneuvered through a vascular system of a patient; and a first sealing plug secured to the guiding member immediately, proximally of the distal end of the balloon member, the first sealing plug defining a first stop that prevents the balloon member and waist tube from being displaced proximally along the core wire as the catheter is being maneuvered through a vascular system of a patient; and a second sealing plug secured to the guiding member immediately, distally of the distal end of the balloon member, the second sealing plug defining a second stop that prevents the balloon member and waist tube form being displaced distally along the core wire as the catheter is being maneuvered through a vascular system of a patient. - View Dependent Claims (16)
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Specification