Porous shaped article of regenerated cellulose adapted for medic

Details Porous shaped article of regenerated cellulose adapted for medic Porous shaped article of regenerated cellulose adapted for medic

1978-02-16

1980-04-22

Michell, Robert W.

Surgery

Truss

Pad

128296, 106168, A61B 1711

Patent

active

041989686

ABSTRACT:
A porous shaped article adapted for medicinal use is disclosed which comprises a porous regenerated cellulose the entire surface of which is covered with a coating comprising a hydrophilizingly effective amount of at least one wetting agent and a substantially water insoluble chemically modified cellulose ether which is crosslinked carboxymethylcellulose or a reaction product of a partially etherified cellulose and a chemical modifying agent which is capable of reacting with the free hydroxy groups of the etherified cellulose.
The articles are coated by first impregnating same with a cellulose ether solution and then treating the impregnated article with a solution of the modifying agent. The wetting agent may be added to either of these steps.
The coated articles retain a high absorption capacity for liquids, yet do not release any substantial amounts of turbidifying impurities into a surrounding liquid and therefore are especially suited for medical uses.

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patent: 2996409 (1961-08-01), Lavely
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patent: 3618607 (1971-11-01), Ells et al.
patent: 3847636 (1974-11-01), Smith
patent: 3961629 (1976-06-01), Richter et al.

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