Northfield Laboratories, Inc.

Illinois Institute of Technology

Norhtfield Laboratories, Inc.

Lakshman R Sehgal

Arthur L Rosen

Gerald Moss

Steven A Gould

Richard E De Woskin

Hansa Sehgal

Richard L Beissinger

Darsh T Wasan

Shuming Zheng

An acellular red blood cell substitute which comprises an essentially tetramer-free, substantially stroma-free, cross-linked, polymerized, pyridoxylated hemoglobin and a nontoxic, pharmaceutically acceptable carrier, its use and a process for preparing said acellular red blood cell substitute.

Acellular red blood cell substitute

A process is disclosed for the preparation of an essentially tetramer-free, essentially stroma-free, cross-linked, polymerized, pyridoxylated hemoglobin which comprises separating red blood cell stroma from blood by means of heat treating step to remove stromal contaminants and filtration or centrifugation or both, pyridoxylating, polymerizing, and removing essentially all of the remaining unmodified tetramer.

A process is provided wherein hemoglobin, a fragile material, is formulated into high hemoglobin content water-in-oil-in-water multiple emulsion while maintaining high yields and high oxygen exchange activity. A multiple emulsion of aqueous oxygen carrying material in oil in outer aqueous phase is suitable for provision of oxygen for oxygen transfer processes. A hemoglobin multiple emulsion in physiologically compatible oil in an outer aqueous saline solution is provided in sufficiently small droplet size to provide oxygen flow through blood vessels to desired body tissues or organs thereby providing a blood substitute.

Oxygen carrying multiple emulsions

Process for preparation of hemoglobin multiple emulsions

An acellular red blood cell substitute which comprises an essentially tetramer-free, substantially stroma-free, cross-linked, polymerized, pyridoxylated hemoglobin and a nontoxic, pharmaceutically acceptable carrier, its uses and a process for preparing said acellular red blood cell substitute.

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Flossmoor, IL, United States of America

Lakshman R Sehgal