An 86-year-old man is being managed postoperatively after a right hemicolectomy for a cecal carcinoma for two days. Preoperatively, he was on antihypertensive medication, which has not been resumed. During the day, his urine output had been poor, with a total of 75 mL produced over the past 8 h. He has taken very little fluid orally during the day. His epidural was removed earlier that afternoon and he has been given NSAIDs for pain relief. Examination The patient is alert and orientated in time, place and person.
He is afebrile, blood pressure is 110/70 mmHg and pulse is 110/min. His chest is clear and heart sounds are normal. His abdomen is tender around the incision, but otherwise soft and non-tender. He has normal bowel sounds and has opened his bowels since the operation. He had postoperative blood tests on day 1, which were normal. What would be your approach to managing this…
