Device for controlling blood circulation for a single needle...

Liquid purification or separation – Serially connected distinct treating with or without storage... – With pump – gas pressure or vacuum source

Reexamination Certificate

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Details

C210S085000, C210S086000, C210S087000, C210S090000, C210S096100, C210S097000, C210S102000, C210S103000, C210S104000, C210S252000, C210S257200, C210S321600, C210S645000, C210S646000, C210S650000, C604S005010, C604S065000, C604S067000

Reexamination Certificate

active

07540958

ABSTRACT:
Device for extracorporeal treatment of blood1intended to operate in a mode with a single needle2, comprising:a treatment unit3having a first compartment4and a second compartment5, which are separated by a semipermeable membrane6,an extracorporeal blood circuit comprising a single needle2, an intake line7in fluid communication with the first compartment4of the treatment unit3, the first compartment4, and a return line8in fluid communication with the first compartment4of the treatment unit3,a purge line9at the outlet of the second compartment5,a closure means (10, 11) acting on at least the intake line7and the return line8in order to generate the alternate sequence of blood intake and return,at least a first chamber12which is in fluid communication with the extracorporeal blood circuit and defines a first additional blood volume, the first chamber12having a variable total content;the first chamber4being rigid and including at least one wall capable of being moved,the device including a means19acting on the chamber12in order to modify the volume of the chamber12, making it possible to store blood during the arterial phase and release blood during the venous phase.

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International Preliminary Report on Patentability of International Application No. PCT/IB2005/000468.

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