The impact of rheologically controlled materials on the identification of airway compromise on the clinical and videofluoroscopic swallowing examinations

Michael E. Groher, Michael A. Crary, Giselle Carnaby, Zata M Vickers, Carlos Aguilar

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)218-225
Number of pages8
Issue number4
StatePublished - Oct 1 2006


  • Aspiration
  • Clinical swallowing examination
  • Deglutition
  • Deglutition disorders
  • Dysphagia
  • Rheology
  • Videofluoroscopic examination

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