REPETITIVE ENTRY CONDUIT FOR BLOOD VESSELS
First Claim
1. A subcutaneous conduit for implanting in a patient to allow repeated access to a blood vessel, comprising:
- a tapered guide segment for guiding a needle through subcutaneous tissue to the blood vessel;
a proximal opening for receiving the needle into the guide segment; and
a distal opening for passing a tip of the needle out of the guide segment into the blood vessel, the distal opening sized and configured to be attached directly to a surface of the blood vessel,wherein the proximal opening is wider than the distal opening such that a width of the guide segment tapers from the proximal opening to the distal opening.
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Accused Products
Abstract
A subcutaneous needle conduit attaches directly to a blood vessel or other biological boundary structure. The subcutaneous needle conduit is tapered such that a proximal end is wider than a distal end. A body of the subcutaneous needle conduit guides the tip of a needle or other canula from the proximal end to the distal end. The subcutaneous needle conduit may be funnel-shaped. An elongated funnel shape may be used to selectively provide access to a plurality of desired access sites along an axis of a blood vessel. Other shapes, such as sluice-shaped, may also be used. The subcutaneous needle conduit may be located beneath the skin surface using, for example, tactile sensation, magnetism, metal detection, detection of a signal emitted from a minute transponder, detection of light emission, or through other detection methods.
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Citations
34 Claims
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1. A subcutaneous conduit for implanting in a patient to allow repeated access to a blood vessel, comprising:
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a tapered guide segment for guiding a needle through subcutaneous tissue to the blood vessel; a proximal opening for receiving the needle into the guide segment; and a distal opening for passing a tip of the needle out of the guide segment into the blood vessel, the distal opening sized and configured to be attached directly to a surface of the blood vessel, wherein the proximal opening is wider than the distal opening such that a width of the guide segment tapers from the proximal opening to the distal opening. - 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 method for repeatedly accessing a blood vessel, comprising:
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making an incision in a patient'"'"'s skin at an incision location; at the incision location, excising a pouch in subcutaneous tissue for receiving a funnel-shaped conduit including a proximal opening, a distal opening, and a tapered guide segment extending between the proximal opening and the distal opening; inserting the funnel-shaped conduit into the pouch; securing the distal opening of the funnel-shaped conduit directly to a surface of the blood vessel; securing the proximal opening to the subcutaneous tissue; repairing the incision; and after a healing period, inserting a needle through the patient'"'"'s skin so as to enter the guide segment through the proximal opening and advance a tip of the needle through the distal opening into the blood vessel. - View Dependent Claims (20, 21)
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22. A subcutaneous conduit comprising:
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an eyelet segment adapted to engage against the surface of a biological boundary structure; a guide segment, including a puncture-resistant surface shaped to narrow such that a needle can first engage a larger segment and be guided by a shaped, narrowing surface towards the eyelet segment; and tabs, located near the eyelet segment, adapted to engage a ligating mechanism for attaching the needle conduit to the biological boundary structure. - View Dependent Claims (23, 24, 25)
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26. A subcutaneous conduit comprising:
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an eyelet segment adapted to engage against the surface of a biological boundary structure; a guide segment, including means for guiding the needle towards the eyelet segment; and means, located near the eyelet segment, adapted to engage a ligating mechanism for attaching the needle conduit to the biological boundary structure. - View Dependent Claims (27, 28, 29)
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30. A system for accessing a biological boundary structure at a desired entry site within a mammalian body, the system comprising:
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one or more metal detector coils within a coil housing, the one or more metal detector coils configured to detect a metallic implant within the mammalian body; and a guide canula attached to the coil housing at an angle such that placement of the one or more metal detector coils over the metallic implant aligns an opening through the guide canula with desired entry site. - View Dependent Claims (31, 32, 33, 34)
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Specification