Videofluoroscopic Swallowing Study (VFSS)
An x-ray-based method of evaluating a person’s swallowing ability. The videofluoroscopic swallowing study (VFSS) is also sometimes called the modified barium swallow, or the “cookie swallow.”
In a radiology suite under fluoroscopy (which creates moving rather than still x-ray images), the patient is asked to swallow barium in thin liquid and paste consistencies, and then in paste on a cookie or cracker. The barium bolus is followed radiographically through the mouth, throat, and into the esophagus. Both lateral and anterior–posterior views are recorded and, depending on the facility, a simple screening sequence of the subsequent movement down the esophagus is also recorded.