Mr Banks is 77 years old and seen with acute abdominal pain as an emergency GP appointment. He describes sudden colicky abdominal pain earlier today and inability to pass flatus or stool. He is known to have longstanding constipation so was not worried until he noticed how distended his abdomen was. On examination his abdomen is distended and tympanic. Observations are stable. You explain that he needs to be reviewed in hospital.
Based on the likely diagnosis, which one of the following options is most likely to be central to his management?
