The group of medical electrical devices .... MORE ... is very comprehensive:

• hospital beds,
• blood pressure transducers,
• respirators,
• electrocardiographs,
• surgical lasers,
• electrical muscle and nerve stimulators,
• aspirators,
• diagnostic devices,
• magnetic stimulators, etc.

Even battery thermometers are included in this group.

Technical requirements ...MORE... referring to electrical medical devices are, in some respects, stricter than the requirements for other electrical devices. 

Basically, they are defined in the IEC/EN 60601 standard series, and the majority of devices are defined in more detail by either sub-standards or standards from other groups.

In order to acquire CE marking for medical devices, risk assessment is also important. It could be prepared according to the EN ISO 14971 standard.