Feedback loop design

I'm wondering if you can recommend the hardware we need for this project
I need to understand what hardware I would need to buy in order to build a feedback loop where the blood pressure (measured from a rat) would be ‘outputted’ and able to control a motor that either sucked air out or pushed air into a sealed box that has half of the rodent inside. We have a simple version of this box designed where I can use a vacuum to suck air out of the box which ‘pulls’ the blood into the lower half of the rat (this is what the sealed box allows). The blood pressure is then reduced. I would like to now advance this by being able to say “I want to reduce blood pressure by exactly 10mmHg” – so the blood pressure would then precisely control how strong the motor is turned on….