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NewYork-Presbyterian/Weill Cornell Medical Center - Center for Advanced Digestive Care

Click on a letter of the alphabet below to view a list of procedures:



Defecography is an x-ray of the anorectal area that evaluates completeness of stool elimination, identifies anorectal abnormalities, and evaluates rectal muscle contractions and relaxation. During the examination, the patient's rectum is filled with a soft paste that is the same consistency as stool. The patient then sits on the toilet positioned inside an x-ray machine, and squeezes and relaxes the anus to expel the solution. The physician studies the x-rays to determine if anorectal problems occurred while the patient was emptying the paste from the rectum.

Dilation Procedure

When strictures (narrowing of the esophagus) are present, caused when the damaged lining of the esophagus becomes thick and hardened, a procedure called dilation is used. During dilation, an instrument gently stretches the strictures and expands the opening of the esophagus.

Duodenal Switch

Duodenal Switch is a variation of biliopancreatic diversion (BPD). More of the stomach is retained, including the valve that controls the release of food into the small intestine. Surgeons then divide the lower intestine further downstream with the gastric bypass, resulting in more of the intestine being bypassed and producing reliable, long-term weight loss. Trials have demonstrated this procedure enables most patients to lose 60-80% of their excess body weight over about 2 years.