in the aqueous solution in accordance with the invention is desirably in the range of between 10 and 100 g l preferably in the range of between 25 and 60 g l particularly preferably in the range of between 30 and 55 g l depending on the respective purpose of use involved the aqueous solutions of gelatin which are used in accordance with the invention may contain conventional further constituents and can be sterilised and packaged in a sterile condition additional additives are for example agents for preventing blood coagulation such as citrate heparin and heparin derivatives glucose in particular in an amount of between 2 5 and 7 5 mmol l and electrolytes they include in particular sodium preferably in a concentration of between 130 and 150 mmol l potassium preferably in a concentration of between 3 and 5 mmol l calcium preferably in a concentration of between 1 and 3 mmol l and magnesium preferably in a concentration of between 0 5 and 1 5 mmol l in the aqueous gelatin solution aqueous solutions of four different commercially available gelatin types according to the invention as well as commercially available additives and dextrans and hydroxyethyl starch which are suitable for infusion solutions and finally physiological.