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Bolus Residue Scale (BRS) scores on Videofluoroscopic Swallowing Study (VFSS), BRS: 1 = no residue; 2 = residue in valleculae; 3 = residue on posterior pharyngeal wall or piriform fossae; 4 = residue in valleculae and posterior pharyngeal wall or piriform fossae; 5 = residue in posterior pharyngeal wall and piriform fossae; 6 = residue in the valleculae and posterior pharyngeal wall and piriform sinus.40
