The role of early radiological studies after gastric bariatric surgery

The authors investigated early radiological findings after gastric surgery for morbid obesity to evaluate their usefulness in avoiding complications or facilitating treatment.

413 patients underwent gastric bariatric surgery: 327 had vertical banded gastroplasty (VBG), 55 Roux-en-Y gastric bypass (RYGBP), 22 adjustable silicone gastric banding (ASGB), and 9 biliopancreatic diversion (BPD). A radiological upper gastrointestinal investigation employing water-soluble contrast medium was performed in each patient between the 2nd and 8th postoperative day. Several techniques were employed to assess different radiological findings related to the anatomic modifications after the bariatric surgery.

In VBGs, delayed emptying was found in 10 patients (3%), gastric leak in 3 patients (0.9%), vertical suture breakdown in 1 patients (0.3%), and a wide pouch in 4 patients (1.2%). In RYGBP, a leak was detected in 2 patients (3.6%), delayed emptying in 2 (3.6%), and a wide pouch in 5 (9.1%). ASGB required band enlargement for stomal stenosis in 6 patients (27.2%). Temporary delayed emptying from stomal stenosis was also observed in 2 BPDs (22.2%). Overall complications were 35/413 (8.2%). Two cases of gastric leak after VBG were reoperated. Stomal stenosis after ASGB were treated by percutaneous band deflation; other cases were medically treated until complete healing.

Early radiological study after gastric bariatric surgery is advisable, since it detected postoperative complications (gastric perforation, stomal stenosis, etc.) and modified the clinical approach. As the interpretation of these radiographs is often difficult, involving different projections or patient's positions or other technical managements, surgeons and radiologists must interact and be knowledgable.