A 42-year-old patient complains of acute spastic abdominal pain, nausea, vomiting with intestinal contents, abdominal distension that decreases alter vomiting, and gas retention.According to the patient's history, the disease onset was 4 hours ago. Objectively, the following is observed: pulse - 110/min, the tongue is dry and coated, the abdomen is asymmetrically distended - enlarged upper half, soft to palpation, painful. Auscultation detects active peristaltic sounds with metallic tinkling. splashing, and gurgling. What is the most likely diagnosis in this case?