Low intermittent suction to J tube

Hello everyone.
I had a patient today who is s/p j tube placement 2 days ago. He has been getting tube feedings at 40 ml/hr.
When I came in to work today. His stomach was distended and full of air. Doctor ordered dulcolax suppository and two hours after that, no result, just a few gas passing. Surgeon who placed j tube said to put in NG tube to decompress his stomach but patient refused because of multiple mass he has in his esophagus. I was a little hesitant too to insert the tube since his INR is 4.0. Anyway, the surgeon then ordered j tube to low intermittent suction. Has anyone heard of this?