# Council Directive 93/42/EEC of 14 June 1993 concerning medical devices, Division 2.3: Rule 7

Extent: E+W+S+N.I.

All surgically invasive devices intended for short-term use are in Class IIa unless they are intended:
either specifically to control, diagnose, monitor or correct a defect of the heart or of the central circulatory system through direct contact with these parts of the body, in which case they are in Class III,
or specifically for use in direct contact with the central nervous system, in which case they are in Class III,
or to supply energy in the form of ionizing radiation in which case they are in Class IIb,
or to have a biological effect or to be wholly or mainly absorbed in which case they are in Class III,
or to undergo chemical change in the body, except if the devices are placed in the teeth, or to administer medicines, in which case they are in Class IIb.

---
Source: https://www.legislation.gov.uk/eudr/1993/42/annex/IX/division/III/division/2/division/2.3 (the official version)
Page: https://openlegislation.uk/eu-directive-1993-42/annex-IX/division-III/division-2/division-2.3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.