 Pylorus will be assessed using EndoFLIP at 20, 30, 40 and 50 cc balloon volume distentions. Pressure will be measured by pressure transducer inside the balloon. CSA will be measured using impedance planimetry by Ohms Law. Distensibility will be calculated as minimum CSA divided by pressure at each balloon fill volume. These measurement will be assessed after the balloon inflated at each balloon distension for minimum of 5 seconds. The length of the pylorus will be assessed visually from EndoFLIP images. Once the EndoFLIP measurements completed at rest, Injection hyoscine 10mg intravascular will be administered, and same measurements will be repeated. Thereafter remaining endoscopic exam will be completed. 