I just found this pulse oximeter that apparently has bluetooth ... but won't be buying it:
I sent them an email asking if they have their bluetooth protocol documented:
"We do not allow direct access to our devices, so unfortunately we will not be providing you the bluetooth protocols. In addition, due to FDA regulations for our pulse oximeter, it is not allowed for 3rd party applications to communicate with our devices."
If the FDA doesn't allow this then publishing it via bluetooth is probably a bad idea.
But maybe it's not bluetooth LE and it's sending data over another proprietary protocol and just using bluetooth as the transport.
Why do all these devices suck? Either they don't have an open API or they send data to a somewhat full featured website but don't have a streaming API...
Fitbit is better, but you can't access their devices over bluetooth (no dox). But at least they have an API now. Basis is dead in the water.