controlling HemoDialysis machine using Arduino

hi, Im using arduino DUE to read several sensors, I want to ask about noise signal that affect the reading? How I can eliminate this noise signal ? Do I have to use filters?

OR can I connect these sensors directly to the analog pins?

please Help

Sensors is such a vague term The answer is. it depends.

What sensors, what noise?

Mark

You know these devices are not certified for medical instruments, don't you?