Before you put the Penfill cartridge into the insulin delivery system, move it up and down between positions a and b and back (see the picture) so that the glass ball moves from one end of the cartridge to the other at least 20 times.
Preden vložek Penfill vstavite v sistem za dajanje insulina, ga premikajte gor in dol med položajema a in b (glejte sliko), tako da se steklena kroglica premika z enega konca vložka na drugega.