Depends on what reliability / response time / etc. you need. The requirements you list are not very specific. You should also look at what interaction you need and what kind of regulation applies to your device (since it's a medical setting, this may influence your choice).
You can potentially go with bare microprocessors and something like http://femtoos.org/ to just small ARM devices with windows. You can do everything on one chip, or split the device drivers onto separate chips and drive them over I2C where specific timing is crucial.
There are many options - I'd start with listing exactly what you need to support (display, io, inputs, timing, single/multi chip, what timing / other guarantees, hardware watchdogs, failsafe states, etc.) and then choose hardware/software based on that.
If you want to produce many devices, I'd stay away from consumer devices like RPi. Simply because you may get stuck with a supply shortage. You can pretty much always order 1k of popular chips, even if it's a shipment from Asia. You may not be able to do the same for a popular RPi model. Also some RPis will get phased out / discontinued at some point and for a medical device you may need to recertify the new model before release.
Comments
Depends on what reliability / response time / etc. you need. The requirements you list are not very specific. You should also look at what interaction you need and what kind of regulation applies to your device (since it's a medical setting, this may influence your choice).
You can potentially go with bare microprocessors and something like http://femtoos.org/ to just small ARM devices with windows. You can do everything on one chip, or split the device drivers onto separate chips and drive them over I2C where specific timing is crucial.
There are many options - I'd start with listing exactly what you need to support (display, io, inputs, timing, single/multi chip, what timing / other guarantees, hardware watchdogs, failsafe states, etc.) and then choose hardware/software based on that.
If you want to produce many devices, I'd stay away from consumer devices like RPi. Simply because you may get stuck with a supply shortage. You can pretty much always order 1k of popular chips, even if it's a shipment from Asia. You may not be able to do the same for a popular RPi model. Also some RPis will get phased out / discontinued at some point and for a medical device you may need to recertify the new model before release.