Table 1.

Bolus residue scale (BRS) scores according to the number of structures affected by residue.

BRS score	Indication of residue
1	No residue
2	Residue in valleculae
3	Residue in posterior pharyngeal wall or piriform sinus
4	Residue in valleculae and posterior pharyngeal wall or piriform sinus
5	Residue in posterior pharyngeal wall and piriform sinus
6	Residue in valleculae and posterior pharyngeal wall and piriform sinus