Superior and Anterior Hyoid Displacement During Swallowing in Non-Dysphagic Individuals

AbstractThe Dynamic Swallow Study (DSS) is a methodology used to objectively and quantitatively assess swallowing kinematics during Videofluoroscopic Swallow Studies (VFSS). No DSS normative data exist delineating superior and anterior hyoid displacement (Hsup andHant, respectively), nor the ratio betweenHsup andHant (SAratio). The aims of this study were to (1) establish normative data forHsup,Hant, and SAratio and (2) assess the effects of age, sex, and bolus size on these measures in non-dysphagic patients, within the context of DSS. VFSSs were reviewed for consecutive elderly ( ≥ 65 years) and non-elderly (<  65 years) male and female non-dysphagic patients. Measurements ofHsup,Hant, and SAratio were made using a novel measurement methodology within the context of the Dynamic Swallow Study (DSS) protocol. Statistical analysis was performed to establish interaction effects and main effects of age, sex, and bolus size onHsup,Hant, and SAratio. Descriptive statistics (mean  ± standard deviations) are outlined forHsup,Hant, and SAratio.Hsup was significantly effected by bolus size and age. Additionally, a significant three-way interaction of age, sex, and bolus size was observed.Hant was significantly effected by bolus size and sex, but no two- or three-way interactions were present. Neither bolus size, age, nor sex significantly effected SAratio. Age, sex, and bolus size normative data were established forHsup,Hant, and SAratio for VFSS kinematic analysis. By out...
Source: Dysphagia - Category: Speech-Language Pathology Source Type: research