Hi
I travel frequently with an insulin pump and for long haul flights always do a temporary basal increase of 20-30% for the duration of the journey (including time sitting at the airport which is often several hours). I find this helps to give better glycaemic control.
Also many diabetics find insulin requirements are higher in colder climates, I assume Germany is much colder than Brazil at present?
Have you done a cannula change in case of problems there?
Regards