Apparatus and method for cannula insertion into vascular access grafts

The guidance device and method for cannula insertion in vascular access grafts, utilizing magnetic materials and applicator devices, addresses the challenge of inaccurate punctures by ensuring precise needle placement, thereby reducing complications and extending graft life.

JP7863222B2Active Publication Date: 2026-05-20INNAVASC MEDICAL INC
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Patent Information

Application Number
JP2025026702
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2017-03-31
Filing Date
2025-02-21
Publication Date
2026-05-20
Estimated Expiration
2038-03-30

AI Technical Summary

Technical Problem

Existing methods for cannula insertion in vascular access grafts, such as arteriovenous fistulas and grafts, are prone to inaccuracies, leading to complications like rupture, hematoma formation, pseudoaneurysm, and graft failure due to the difficulty in accurately locating the puncture site, which is often several centimeters below the skin surface and cannot be visually identified.

Method used

A guidance device and method using a flexible conduit with a cannula insertion chamber, combined with magnetic or paramagnetic materials, applicator devices, and adhesive stickers, to accurately locate and guide needle insertion into vascular access grafts, ensuring precise cannula placement.

Benefits of technology

The solution significantly reduces incorrect punctures, minimizes damage to the graft, delays pseudoaneurysm formation, and enhances the longevity of vascular access grafts by providing accurate and reproducible needle insertion, thus reducing complications and maintaining graft patency.

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Abstract

To provide an excellent apparatus.SOLUTION: There is provided an apparatus for guiding cannulation with a dialysis needle of an arteriovenous dialysis access graft subcutaneously implanted in a body of a subject. The guiding apparatus comprises an elongated body member comprising a base portion terminating in longitudinal edges, a distance between the longitudinal edges of the base portion being substantially equal to a lateral dimension of the aces graft, and an elongated tubular sleeve defining a pocket having a longitudinal dimension and a lateral dimension configured to receive the body member. The body member is adapted to be received in the pocket of the sleeve for securing adjacent the subcutaneous access graft such that the inner surface of the base portion is aligned with a cannulation point of the graft for guiding location of a needle insertion.SELECTED DRAWING: Figure 1
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