If the fluoro (X-ray) machine fails during a procedure, you can either bring in a portable C-arm, or move the patient (mid-procedure) to a different procedure room with working equipment.
If the power goes out and the backup generator fails during a procedure, people take out their cell phones and use the flashlight. If the patient is intubated, you can manually ventilate the patient.
If the equipment you need for an emergency procedure is not working, there is often an older, lower tech method to do the same procedure, or at least stabilize the patient.
If the electronic medical record system goes down, you can use pen and paper. Those records are then scanned in or entered into the EMR when it's back up.
Unexpected things happen a lot in medicine, so it's good to always have contingency plans.
If the power goes out and the backup generator fails during a procedure, people take out their cell phones and use the flashlight. If the patient is intubated, you can manually ventilate the patient.
If the equipment you need for an emergency procedure is not working, there is often an older, lower tech method to do the same procedure, or at least stabilize the patient.
If the electronic medical record system goes down, you can use pen and paper. Those records are then scanned in or entered into the EMR when it's back up.
Unexpected things happen a lot in medicine, so it's good to always have contingency plans.
Source: I'm an interventional radiologist.