A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 1/14 (2006.01) A61M 1/30 (2006.01) A61M 5/158 (2006.01) A61M 5/32 (2006.01)
Patent
CA 2550069
A needle disengagement sensing mechanism includes a fistula needle that is adapted to carry fluid. An electronic sensing system is operatively connected to the needle. The sensing system is capable of detecting partial or full disengagement of the needle from a position where it is engaged with the fluid. Disengagement detection is a result of i) a comparative analysis of complex impedance measurements of the needle when in and at least partially out of the fluid engaged position and/or ii) a comparative analysis of optical spectroscopic measurements taken through an area of the mechanism adapted to carry the fluid, the measurements being taken when the needle is in and at least partially out of the fluid engaged position. An alarm control conduit operatively connects the sensing system to a hemodialysis machine and/or an electronic device. The alarm control conduit generates an alarm upon detecting at least partial disengagement of the needle.
Lovejoy David A.
Sevrain Christophe
Voto Andrew M.
Youngblood James H.
Delphi Technologies Inc.
Gowling Lafleur Henderson Llp
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