Active therapeutic devices with an integrated or incorporated diagnostic function which significantly determines the patient management by the device, such as closed loop systems or automated external defibrillators, are classified as class III.
Feistí teiripeacha gníomhacha a bhfuil feidhm chorpraithe dhiagnóiseach nó chomhtháite acu, lena gcinntear go mór an bainistiú othar leis an bhfeiste, aicmítear mar aicme III iad, amhail córais uathoibríocha lúbiata nó dífhibrileoirí seachtracha.