All active devices intended to administer and/or remove medicinal products, body liquids or other substances to or from the body are classified as class IIa, unless this is done in a manner that is potentially hazardous, taking account of the nature of the substances involved, of the part of the body concerned and of the mode of application in which case they are classified as class IIb.
Is faoi aicme IIa a aicmítear na feistí gníomhacha ar fad a beartaíodh le haghaidh táirgí íocshláinte, leachtanna coirp nó substaintí eile a thabhairt don chorp agus/nó a aistriú chuig an gcorp nó uaidh, ach amháin má dhéantar é sin ar bhealach a d'fhéadfadh a bheith guaiseach, lena gcuirfear san áireamh na substaintí lena mbaineann, an ball coirp atá i gceist agus modh an fhorchuir, agus sa chás sin tá siad aicmithe mar aicme IIb.