Soru

An 82-year-old male resident of a skilled nursing facility is transported to the emergency department after experiencing progressive abdominal distention, nausea, and an inability to pass flatus or stool for the past 48 hours. He has a past medical history of advanced Parkinson disease, chronic constipation, and hypertension. Current vital signs include a temperature of 37.1°C (98.8°F), blood pressure of 135/85 mmHg, pulse of 88/min, and respirations of 16/min. Physical examination reveals a massively distended and tympanitic abdomen. There is mild diffuse discomfort to palpation, but no guarding, rigidity, or rebound tenderness is appreciated. A plain upright abdominal radiograph is obtained and demonstrates a markedly dilated loop of large bowel forming a characteristic 'coffee bean' appearance extending from the pelvis toward the upper abdomen, without pneumoperitoneum. Which of the following is the most appropriate next step in the procedural management of this patient?