Device for removing blood microemboli

Liquid purification or separation – Filter – Within flow line or flow line connected close casing

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Details

210489, 210DIG23, B10D 2500

Patent

active

039351114

ABSTRACT:
A device for removing microemboli including microparticles and aggregates of various types including degenerated blood elements from whole blood or other transfusible materials, such as packed red cells and other blood components. The device has a casing with an interior chamber and is provided with externally-connectable flow inlet and flow outlet ports relative to the interior of the chamber, with a plurality of effective layers of microemboli-removing material positioned in the chamber and sealed to the inner periphery of the casing to require blood flow therethrough in travel of the blood from the flow inlet to the flow outlet. Each of said layers of microemboli-removing material consists of a foamed open cell polyurethane to define tortuous flow passages therethrough and with the layers having progressively smaller effective pore sizes whereby the blood in flowing therethrough has substantially all of the microemboli of a size to block passages in a layer prevented from flowing thereto by adherence to the walls of the tortuous passages in a preceding layer of said material. Two different embodiments are shown, with one embodiment having bypass structure.

REFERENCES:
patent: 2696818 (1954-12-01), Van Loghem
patent: 3276597 (1966-10-01), Mesek et al.
patent: 3448041 (1969-06-01), Swank
patent: 3593854 (1971-07-01), Swank
patent: 3682386 (1972-08-01), Herman
patent: 3747769 (1973-07-01), Brumfield
patent: 3765536 (1973-10-01), Rosenberg

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