title: The effect of asymmetric pharyngoesophageal pressures on manofluorographic measurements.
abstract: The fact that pressures in the pharynx are asymmetric has raised questions about the validity of measurements made using manofluorography. Using a special manometric catheter that measures the pressures in four different directions, manofluorography was performed on seven normal volunteers and the measurements in the four directions were compared. When the bolus was not present the measurements were found to be asymmetrical. When the bolus filled the cavity, the measurements were symmetrical. Therefore, manometric measurements made in the pharynx during bolus flow are not invalidated by variations in the orientation of the catheter.
authors.affiliation: Department of Surgery, Emory University School of Medicine, Atlanta, Ga.
authors.forename: F M
authors.initials: FM
authors.lastname: McConnel
authors.forename: T N
authors.initials: TN
authors.lastname: Guffin
authors.forename: D
authors.initials: D
authors.lastname: Cerenko
mesh_terms: D002404:Catheterization / Q000295:instrumentation; D003679:Deglutition / Q000502:physiology*; D004867:Equipment Design; D004947:Esophagus / Q000033:anatomy & histology / Q000502:physiology*; D005471:Fluoroscopy; D006801:Humans; D007830:Larynx / Q000502:physiology; D008365:Manometry; D010614:Pharynx / Q000033:anatomy & histology / Q000502:physiology*; D011312:Pressure; D013396:Suction; D014059:Tongue / Q000502:physiology