OBJECTIVES: To evaluate the timing of the swallowing process and the effect of bolus viscosity on swallowing. DESIGN: Prospective observational study. SETTING: General teaching hospital, rehabilitation unit. PARTICIPANTS: We enrolled patients with dysphagia (n=82) in a videofluoroscopic swallowing study (VFSS) from January 13, 2009, to October 22, 2009. Based on VFSS results, we classified patients as "thin-fluid aspirators" (n=40) or as "nonaspirators" (n=42). INTERVENTIONS: Swallowing of a 5-mL thick bolus and a 5-mL thin bolus in all patients. MAIN OUTCOME MEASURES: Kinematic analysis of various variables during the swallowing process (pharyngeal phase), including epiglottis contact with the bolus, laryngeal elevation, pharyngeal constriction, and upper esophageal sphincter opening. RESULTS: In both groups, the thin bolus arrived at the vallecular pouch earlier than the thick bolus. During swallowing of the thick bolus, the thin-fluid aspirators had a delayed latency of upper esophageal sphincter opening, delayed laryngeal elevation to peak level, and significantly longer rise time of laryngeal elevation. CONCLUSIONS: Our results indicate clear differences in the degree of adaptation to bolus viscosity between patients classified as thin-fluid aspirators and as nonaspirators. These differences were mainly in activities of laryngeal elevators rather than pharyngeal constrictors.
OBJECTIVES: To evaluate the timing of the swallowing process and the effect of bolus viscosity on swallowing. DESIGN: Prospective observational study. SETTING: General teaching hospital, rehabilitation unit. PARTICIPANTS: We enrolled patients with dysphagia (n=82) in a videofluoroscopic swallowing study (VFSS) from January 13, 2009, to October 22, 2009. Based on VFSS results, we classified patients as "thin-fluid aspirators" (n=40) or as "nonaspirators" (n=42). INTERVENTIONS: Swallowing of a 5-mL thick bolus and a 5-mL thin bolus in all patients. MAIN OUTCOME MEASURES: Kinematic analysis of various variables during the swallowing process (pharyngeal phase), including epiglottis contact with the bolus, laryngeal elevation, pharyngeal constriction, and upper esophageal sphincter opening. RESULTS: In both groups, the thin bolus arrived at the vallecular pouch earlier than the thick bolus. During swallowing of the thick bolus, the thin-fluid aspirators had a delayed latency of upper esophageal sphincter opening, delayed laryngeal elevation to peak level, and significantly longer rise time of laryngeal elevation. CONCLUSIONS: Our results indicate clear differences in the degree of adaptation to bolus viscosity between patients classified as thin-fluid aspirators and as nonaspirators. These differences were mainly in activities of laryngeal elevators rather than pharyngeal constrictors.
Authors: Jun Chang Lee; Kyoung Won Nam; Dong Pyo Jang; Nam Jong Paik; Ju Seok Ryu; In Young Kim Journal: Dysphagia Date: 2016-11-17 Impact factor: 3.438
Authors: Rodolfo E Peña-Chávez; Nicole E Schaen-Heacock; Mary E Hitchcock; Atsuko Kurosu; Ryo Suzuki; Richard W Hartel; Michelle R Ciucci; Nicole M Rogus-Pulia Journal: Dysphagia Date: 2022-10-20 Impact factor: 2.733
Authors: Shaina Devi Holman; Danielle R Waranch; Regina Campbell-Malone; Peng Ding; Estela M Gierbolini-Norat; Stacey L Lukasik; Rebecca Z German Journal: J Neurophysiol Date: 2013-05-01 Impact factor: 2.714