Brief Answer:
Standing X-ray abdomen and Enteroclysis 
Detailed Answer:
Hi.
Thanks for a short and specific question. 
Symptoms which you may get :
Pain in abdomen with a character of spasm, comes on suddenly and go away, may coincide with 
nausea and/or 
vomiting. There can be distension of abdomen with gaseous feeling, may be rumbling, gurgling or tinkling sound. Sometimes there can be no passage of gases and/or feces. There can be a history of previous 
abdominal surgery or infection in the past.
I would advise the following investigations in a systematic way: 
First of all; an X-ray of the abdomen in a STANDING position particularly when in pain, distension. This is the easiest, cheapest and best diagnostic tool. 
Yet should be confirmed by: Enteroclysis by an expert 
Radiologist ( every Radiologist may not be doing this) wherein a small Freka tube ( no pain or discomfort) is passed and liquid barium or water-soluble radio-opaques XXXXXXX is pushed under fluoroscopic guidance for real-time passage to be seen in the screen. This gives the perfect diagnosis about the adhesions / cause of 
intestinal obstruction.
Lastly as a Surgeon we do  ''DIAGNOSTIC'' 
Laparoscopy to confirm the diagnosis , ascertain the cause, and is many times a  ''THERAPEUTIC'' procedure at the same time as ''bands '' are the easiest to treat with the most satisfying results. 
I hope I have trued to answer your query.
Please feel free to contact if you want any other information.