Medical supplies for peritoneal dialysis

I will be departing from Shanghai Pudong International airport in July to Europe. I am a kidney dialysis patient, on Peritoneal Dialysis and need to carry in my hand luggage dialysis solution for exchange during my trip. I have coordinated the quantity allowed in hand luggage with Austrian Airlines (4 bags x2000 ml is what they allow on board). What documentation do I need in order to pass Security check at Pudong International Airport.
Thank you,