Medical apparatus and instruments; apparatus for blood and blood plasma analysis, apparatus for blood extraction and blood analysis; diagnostics and analysis apparatus for medic al purposes, in particular blood glucose meters, devices for measuring glycaemia; medical apparatus for introducing pharmaceutical preparations into the body, in particular apparatus for introducing insulin and/or glucagon; pumps for medical purposes; insulin and glucagon pumps; belts for medical purposes; injection devices for medical purposes; insulin and glucagon injection pens; medical test kits for diabetes monitoring for home or clinical use