the stethescope, when used with a special inflatable cuff and dial, can also be used to check a persons blood pressure.

which word if added to the eggining will help understand that another use for the stetscope is going to be disscussed

and
then
however
so

1 answer

and would be the simple answer. It indicates additional information is forthcoming.

Context is everything though, The cranial saw is pretty much a one use tool, however the stethoscope....

Yes that example of mine is hideous, I am just using it to show how what came before is critical to the final word choice.