Numerous studies have suggested that the clinical evaluation of swallowing fails to adequately identify those patients who aspirate or do not aspirate on a videofluoroscopic swallowing examination. These conclusions, however, are based on comparisons between swallowed materials that were not rheologically matched. The present study used a battery of rheologically matched test materials, involving thin and thick liquids and cohesive and adhesive semisolids. Using these test items, results from a clinical swallow evaluation were compared to the results of a videofluorographic evaluation using identical test materials. Results suggest that the use of three test materials, including thin and thick liquids given in volumes of 5 and 10 ml, demonstrated the strongest associations between cough on the clinical examination and aspiration on the videofluoroscopic examination.
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The authors thank Amy Harju, M.A., R.D., for her help in providing test stimuli from the sensory panels and dietitians in the greater Minneapolis area; Don Tymchuck of Med-Diet Laboratories, Inc., for his inspiration and guidance to begin this work; and Cynthia DuBose, M.A., for her assistance in data collection. This study was supported by a grant from the Sota-Tec Foundation.
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Groher, M.E., Crary, M.A., Carnaby (Mann), G. et al. The Impact of Rheologically Controlled Materials on the Identification of Airway Compromise on the Clinical and Videofluoroscopic Swallowing Examinations. Dysphagia 21, 218–225 (2006). https://doi.org/10.1007/s00455-006-9046-3
- Clinical swallowing examination
- Videofluoroscopic examination
- Deglutition disorders