No specific preparation is needed before esophageal manometry, although the child will be asked to refrain from eating four or more hours prior. The thin flexible plastic catheter will be placed while your child is awake with the use of numbing medicine (spray or gel) in the nostril. A small amount of gagging and discomfort is normal during insertion of the catheter. Alternately, the catheter can be placed while asleep if your child is undergoing another procedure that requires anesthesia. The test is typically performed with a series of swallows that may include thin liquids (such as water or Gatorade), thick liquids (applesauce) and solids (such as bread, marshmallows or specific foods your child has difficulty swallowing). A technician, nurse or doctor will guide the child through the different swallows and the test is typically complete in 45-60 minutes.