Division 2.3 Rule 7
United Kingdom
All surgically invasive devices intended for short-term use are in Class IIa unless they are intended:
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F1either 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,
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or specifically for use in direct contact with the central nervous system, in which case they are in Class III,
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or to supply energy in the form of ionizing radiation in which case they are in Class IIb,
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or to have a biological effect or to be wholly or mainly absorbed in which case they are in Class III,
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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.