The effects of bolus flow on vertical pharyngeal pressure measurement in the pharyngoesophageal segment: clinical significance.
Measurement of pressures in the pharyngeal esophageal segment (P-E segment) is complicated by the vertical motion and by the rapidly changing pressures in the segment. The sensors move superiorly and inferiorly with respect to the P-E segment during the swallow. This study examines the validity of manofluorographic measurements taken in the P-E segment by using a catheter with sensors spaced at 1 cm intervals. Seven normal volunteers were tested. Measurements were similar using one sensor and using an average of five sensors. During the time of bolus passage, the P-E segment is open and the bolus itself equalizes pressures measured within the bolus.
McConnel
F M
FM
Department of Surgery, Emory University School of Medicine, Atlanta, GA.
Guffin
T N
TN
Cerenko
D
D
Ko
A S
AS
D003679:Deglutition / Q000502:physiology*; D004947:Esophagus / Q000502:physiology*; D005471:Fluoroscopy; D006801:Humans; D008365:Manometry; D010614:Pharynx / Q000502:physiology*; D011312:Pressure