Esophageal Manometry:  It may also be helpful for excluding generalized gastrointestinal (GI) tract disease such as scleroderma. A small catheter, about 5mm in diameter, which is a pressure transducer, is gently placed into the nose and passed into the stomach after local anesthetic is applied to the nasal passage of the throat. The esophageal function will then be evaluated while the patient swallows a small amount of water. 

Rectal Manometry: Rectal manometry is a test used to measure and assess pressure, reflexes and sensation in the rectum. The test also evaluates the efficiency of the anal sphincter. The procedure will help the physician evaluate the cause and determine the correct treatment of fecal incontinence or constipation.