Application of B+M-Mode Ultrasonography in Assessing Deglutitive Tongue Movements in Healthy Adults

Li, Changtian; Li, Junlai; Cao, Xiaolin; Li, Nan; Song, Danfei; Yu, Ting

doi:10.12659/msm.893591

Cited by 14 publications

(1 citation statement)

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“…B-mode (2D) ultrasound has also been used to assess lingual propulsion during oral bolus transport. However it has been more common for M-mode traces, which can represent sequential movements of the tongue dorsum during swallowing as display of linear distance against time, from which quantitative measurements could be made [6]. Peng et al [7] divided the swallowing process into five phases based on specific inflection points identified on M-mode traces.…”

Section: Introductionmentioning

confidence: 99%

Tongue Shape Dynamics in Swallowing Using Sagittal Ultrasound

Ohkubo

Scobbie

2018

Dysphagia

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Ultrasound imaging is simple, repeatable, gives real-time feedback, and its dynamic soft tissue imaging may make it superior to other modalities for swallowing research. We tested this hypothesis and measured certain spatial and dynamic aspects of the swallowing to investigate its efficacy. Eleven healthy adults wearing a headset to stabilize the probe participated in the study. Both thickened and thin liquids were used, and liquid bolus volumes of 10 and 25 ml were administered to the subjects by using a cup. The tongue's surface was traced as a spline superimposed on a fan-shaped measurement space for every image from the time at which the tongue blade started moving up toward the palate at the start of swallowing to the time when the entire tongue was in contact with the palate. To measure depression depth, the distance (in mm) was measured along each radial fan line from the location at which the tongue's surface spline intersected the fan line to the point where the hard palate intersected the fan line at each timepoint. There were differences between individual participants in the imageability of the swallow, and so we defined quantitatively "measureable" and "unmeasurable" types. The most common type was measureable, in which we could find a clear bolus depression in the cupped tongue's surface. Indeed, with 10 ml of thin liquids, we were able to find and measure the depression depth for all participants. The average maximum radial distance from the palate to the tongue's surface was 20.9 mm (median) (IQR: 4.3 mm) for swallowing 10 ml of thin liquid compared to 24.6 mm (IQR: 3.3 mm) for 25 ml of thin liquid swallow (p < 0.001). We conclude that it is possible to use ultrasound imaging of the tongue to capture spatial aspects of swallowing.

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Section: Introductionmentioning

confidence: 99%