MSFinals-3696
A 68-year-old woman with a history of stage III endometrial cancer and mucinous pancreatic cancer presents to the Emergency Department with severe abdominal pain. The pain has been ongoing for the last four weeks but has worsened in the last three days as she has run out of her analgesia. She denies nausea or vomiting and she has been opening her bowels regularly. She has not been able to get an appointment with the general practitioner so that the pain medication could be prescribed. She was admitted to a hospice last week for end-of-life care.
Examination reveals a distended abdomen. There is shifting dullness present. Bowel sounds are present. The abdomen is mildly tender to touch. Her legs are also oedematous.
Which of the following is the most appropriate step in management?