The subject of the present invention is a method for monitoring the oxygenation of a graft, comprising: a) mixing an organ preservation solution with at least one oxygen transporter, preferably chosen from annelid extracellular haemoglobin, the globins thereof and the globin protomers thereof, in order to obtain a c...

The present invention relates to a composition comprising, in a physiologically acceptable aqueous medium: - at least one molecule chosen from an annelid globin, an annelid globin protomer and an annelid extracellular haemoglobin, - at least one hydrophilic thickening polymer chosen from polymers of natural origin, ...