You are the NP on the neurosurgical team. You are rounding on a 58-year-old patient who has undergone a TPH (trans sphenoidal hypophysectomy) for pituitary removal. You have concerns for diabetes insipidus (DI). Discuss DI in relation to a postoperative neurosurgical patient. What are the signs and symptoms leading to your concerns? How would you manage the patient? What further complications could be caused from DI?