Would you increase the delivered dose to more than 25 ml/kg/hr in a patient on CKRT if a prolonged interruption for a procedure is planned for the day?  

Randomized trials have not demonstrated a benefit of high dose CKRT vs lower dose CKRT (20-25ml/kg/hr). I typically prescribe a dose of 25-30ml/kg/hr to give some cushion so that the delivered dose is at least 20-25ml/kg/hr in the event of interruptions due to radiology studies, filter clotting, etc...