The classification rules should take into account the place where the device performs its action in or on the human body, where it is introduced or applied, and whether a systemic absorption of the substances of which the device is composed, or of the products of metabolism in the human body of those substances occurs.
Ba cheart go gcuirfí san áireamh leis na rialacha aicmithe an áit i gcorp an duine nó ar chorp an duine a bhfeidhmíonn an fheiste, an áit a dtugtar isteach nó a gcuirtear í, agus cibé acu an dtarlaíonn ionsú córasach na substaintí dá bhfuil an fheiste comhdhéanta, nó táirgí meitibilithe na substaintí sin i gcorp an duine.