Cellulosic membrane for blood dialysis

Details Cellulosic membrane for blood dialysis Cellulosic membrane for blood dialysis

1978-02-07

1981-06-30

Spear, Jr., Frank A.

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

2105002, B01D 3100, B01D 1300

Patent

active

042761727

ABSTRACT:
A multilayer cellulosic membrane for blood dialysis and a method for the production of said membrane by regeneration from separately extruded cuprammonium cellulose solutions brought together to form two or more permanently adhered layers, each layer forming a seal against blood penetration through the leakage points of an adjacent layer, the resulting multilayer membrane thus being substantially free of blood leakage over the total thickness of the membrane. Especially preferred membranes for blood dialysis are those in which the layer arranged on the blood side of the diaphragm contains a modified cellulose chemically bound with an antithrombogenic substance.

REFERENCES:
patent: 3276996 (1966-10-01), Lazare
patent: 3600487 (1971-08-01), Zavasnik
patent: 3673612 (1972-07-01), Merrill et al.
patent: 3888771 (1975-06-01), Isuge et al.
patent: 4061461 (1977-12-01), Hessenthaler
patent: 4071590 (1978-01-01), Strathmann
patent: 4127625 (1978-11-01), Arisaka et al.
Merrill, et al., "Antithrombogenic Cellulose Membranes for Blood Dialysis," from vol. XII, Trans. Amer. Soc. Artif. Int. Organs, 1966, pp. 139-150.

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