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With electrical safety and electromagnetic compatibility labelling, teams always attempt to disagree with the standard requirement claiming patients won't understand this type of labelling. In 11608-4:2007, the standard even had the following:
12.2.2 It is not in the line of IEC 60601-1 to place a symbol for either type B, or type BF or type CF on a peninjector, as this symbol could confuse the private user of the pen-injector (the user does not need to know about the IEC 60601-1 standard). It is probably in line with IEC 60601-1 to classify a pen-injector in its documentation as "internally powered" (no symbol for this on the pen-injector).
If the pen-injector is part of a system, the relevant symbol (B, BF or CF) shall be placed on the pen-injector according to IEC 60601-1-1. In this situation, the importance of the IEC 60601-1-1 compensates for the disadvantage that the private user gets confused by a symbol.
However, I notice that the 2022 version of this standard (ISO 11608-4:2022) has no mention of this language. Nowhere that I can find (in the BS editio). Was it removed? Does anyone know why?