Medical Fetish question

Me and my OH have been looking at the Medical Fetish toys and have been wondering about the speculums and how they work really.

For example when using a vagainal speculum can other things be insterted? if so what?

We're always willing to try new things together, or him telling me we are doing new things but this is an area wher we're not too sure, althought I know we're plannin on getting a pinwheel at some piont.