Microtaper needle and method of use
First Claim
1. A medical device comprising:
- a tapered guide wire comprising a first length and a second length, wherein said first length has a diameter and said second length has a diameter that is larger than said diameter of said first length; and
a medical needle adapted to access the interior of a patient'"'"'s vessel by insertion of the medical needle therein and facilitate insertion of said tapered guide wire into the interior of the patient'"'"'s vessel, the medical needle comprising a substantially rigid tapered tube portion having a first end, a second end, and a channel extending therethrough between said first end and said second end, said channel having a first diameter at said first end of said substantially rigid tapered tube portion, wherein said first diameter of said channel allows for at least a portion of said first length of said tapered guide wire to be passed through said channel while substantially maintaining said first diameter of said channel, said substantially rigid tapered tube portion comprising;
a sharpened distal end portion disposed at said first end of said substantially rigid tapered tube portion, said sharpened distal end portion defining a cutting surface adapted to create an incision in a vessel wall of a subject to facilitate insertion of said sharpened distal end portion into the interior of a patient'"'"'s vessel, wherein said channel extends through said sharpened distal end portion to define an opening therein, wherein at least a portion of said first length of said tapered guide wire can be passed through said channel, through said opening in said sharpened distal end portion, and introduced into the interior of the patient'"'"'s vessel while said channel substantially maintains said first diameter at said first end;
one or more slots adapted to facilitate radial expansion of said channel from said first diameter of said channel to at least said diameter of said second length of said tapered guide wire to enable advancement of at least a portion of said second length of said tapered guide wire through said channel, through said opening in said sharpened distal end portion, and into the interior of the patient'"'"'s vessel without using a separate introducer or dilator.
4 Assignments
0 Petitions
Accused Products
Abstract
The present invention relates to medical needles used in connection with guide wires. A needle of the present invention includes a substantially cylindrical tube formed along a central longitudinal axis. A tapered tube is connected to one end of the tube and has a sharpened end. A channel extends through the cylindrical tube and the tapered tube, and is aligned with the longitudinal axis. In some embodiments, the tapered portion is radially expandable. For instance, radial expansion may result when a guide wire is selectively inserted through the channel. The radial expansion may be facilitated by a relief on the tapered tube portion. Optionally, the relief includes a plurality of slots which expand as a guide wire is inserted through the channel and tapered portion, thereby also causing the internal and outer diameters of the tapered portion to expand.
306 Citations
24 Claims
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1. A medical device comprising:
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a tapered guide wire comprising a first length and a second length, wherein said first length has a diameter and said second length has a diameter that is larger than said diameter of said first length; and a medical needle adapted to access the interior of a patient'"'"'s vessel by insertion of the medical needle therein and facilitate insertion of said tapered guide wire into the interior of the patient'"'"'s vessel, the medical needle comprising a substantially rigid tapered tube portion having a first end, a second end, and a channel extending therethrough between said first end and said second end, said channel having a first diameter at said first end of said substantially rigid tapered tube portion, wherein said first diameter of said channel allows for at least a portion of said first length of said tapered guide wire to be passed through said channel while substantially maintaining said first diameter of said channel, said substantially rigid tapered tube portion comprising; a sharpened distal end portion disposed at said first end of said substantially rigid tapered tube portion, said sharpened distal end portion defining a cutting surface adapted to create an incision in a vessel wall of a subject to facilitate insertion of said sharpened distal end portion into the interior of a patient'"'"'s vessel, wherein said channel extends through said sharpened distal end portion to define an opening therein, wherein at least a portion of said first length of said tapered guide wire can be passed through said channel, through said opening in said sharpened distal end portion, and introduced into the interior of the patient'"'"'s vessel while said channel substantially maintains said first diameter at said first end; one or more slots adapted to facilitate radial expansion of said channel from said first diameter of said channel to at least said diameter of said second length of said tapered guide wire to enable advancement of at least a portion of said second length of said tapered guide wire through said channel, through said opening in said sharpened distal end portion, and into the interior of the patient'"'"'s vessel without using a separate introducer or dilator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A medical device comprising:
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a tapered guide wire comprising a first diameter along a first portion and a second diameter along a second portion, wherein said second diameter is larger than said first diameter; and a medical needle adapted to (i) secure and confirm access to the interior of a vessel, (ii) enable passage of at least a portion of said first portion of said tapered guide wire through said medical needle and into the interior of the vessel to facilitate selective positioning of said first portion of said tapered guide wire within the interior of the vessel, and (iii) radially expand to allow for advancement of at least a portion of said second portion of said tapered guide wire through said medical needle and into the interior of the vessel, said medical needle comprising; a substantially rigid tapered tube having a channel extending therethrough from a first end to a second end, said first end of said tapered tube comprising a sharpened distal portion adapted to create an incision in a wall of the vessel and be inserted into the interior of the vessel, said channel extending through said sharpened distal portion to define an opening in said sharpened distal portion, said channel having a diameter at said opening to enable at least a portion of said first portion of said tapered guide wire to pass through said channel, out of said opening, and be introduced into the interior of the vessel to facilitate selective positioning of said first portion of said tapered guide wire within the vessel; and a first slot and one or more secondary slots that facilitate radial expansion of said tapered tube to allow for advancement of at least a portion of said second portion of said tapered guide wire through said channel and into the vessel, wherein; said first slot extends along a length of a substantial portion of said tapered tube, said first slot having a first end that intersects said sharpened distal portion before said tapered tube radially expands to allow for advancement of said second portion of said tapered guide wire through said channel; and said one or more secondary slots extend along a length of a substantial portion of said tapered tube, said one or more secondary slots being angularly offset from said first slot, at least one slot of said one or more secondary slots having a first end adjacent to and linearly offset from said sharpened distal portion before said tapered tube radially expands to allow for advancement of said second portion of said tapered guide wire through said channel, wherein said first slot and said one or more secondary slots comprise a coating adapted to inhibit blood or air leakage through said first slot and said one or more secondary slots when said sharpened distal portion is inserted into the vessel, and wherein said medical needle is adapted to facilitate insertion of at least a portion of each of said first and second portions of said tapered guide wire into the vessel of a subject while said sharpened distal portion is positioned within the vessel of the subject. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification