Biomechanical Analysis of Hyoid Bone Displacement in Videofluoroscopy: A Systematic Review of Intervention Effects

Jolien G. J. van der Kruis, Laura W. J. Baijens, Renée Speyer and Iris Zwijnenberg

Dysphagia, Volume 26, Number 2 (2011), 171-182, DOI: 10.1007/s00455-010-9318-9

Abstract

This systematic review explores studies using biomechanical analysis of hyoid bone displacement in videofluoroscopy of swallowing as a spatial outcome parameter to evaluate intervention effects. Two authors independently carried out the literature search using the electronic databases Embase, PubMed, and Cochrane Library. Differences in their search findings were settled by discussion. The search was limited to publications in the English, German, French, Spanish, or Dutch language. MeSH terms were used, supplemented by free-text words to identify the most recent publications. In addition, reference lists were searched by hand. Only studies using videofluoroscopy to evaluate the biomechanical effects of swallowing interventions in dysphagic subjects were included in the review. While the body of literature on measuring hyoid bone displacement in videofluoroscopy has grown, only 12 studies met the inclusion criteria. Several of the 12 studies had methodological shortcomings. In general, the conclusions could not be compared across the studies because of their heterogeneous designs and outcome measures. Overall, several intervention effect studies reported significant results. In particular, bolus modification and swallowing maneuvers showed a greater range of hyoid bone displacement. In light of this review, further research on hyoid bone displacement as a spatial variable in well-defined patient populations using well-defined videofluoroscopic protocols to measure intervention effects is recommended.

Keywords  Systematic review – Hyoid bone – Biomechanical analysis – Videofluoroscopy – Deglutition – Deglutition disorders

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