Ann Rehabil Med.  2016 Dec;40(6):1018-1023. 10.5535/arm.2016.40.6.1018.

Increased Bolus Volume Effect on Delayed Pharyngeal Swallowing Response in Post-stroke Oropharyngeal Dysphagia: A Pilot Study

• Park JW
• Sim GJ
• Yang DC
• Lee KH
• Chang JH
• Nam KY
• Lee HJ
• Kwon BS

• KMID: 2371333
• DOI: http://doi.org/10.5535/arm.2016.40.6.1018

Abstract

OBJECTIVE
To confirm a relationship between the pharyngeal response and bolus volume, and examine whether increasing the fluid bolus volume can improve penetration and aspiration for stroke dysphagic patients.
METHODS
Ten stroke patients with a delayed pharyngeal response problem confirmed by a videofluoroscopic swallowing study (VFSS) were enrolled. Each subject completed two swallows each of 2 mL, 5 mL, and 10 mL of barium liquid thinned with water. The pharyngeal delay time (PDT) and penetration-aspiration scale (PAS) were measured and the changes among the different volumes were analyzed.
RESULTS
PDTs were shortened significantly when 5 mL and 10 mL of thin barium were swallowed compared to 2 mL. However, there was no significant difference in PAS as the bolus volume increased.
CONCLUSION
The increased fluid bolus volume reduced the pharyngeal delay time, but did not affect the penetration and aspiration status.

Keyword

Deglutition disorders; Stroke; Reaction time; Respiratory aspiration; Fluoroscopy

MeSH Terms

Barium
Deglutition Disorders*
Deglutition*
Fluoroscopy
Humans
Pilot Projects*
Reaction Time
Respiratory Aspiration
Stroke
Swallows
Water
Barium
Water

Figure

• 

  Fig. 1 The graph shows changes in pharyngeal delay time (PDT) according to bolus volume changes. PDTs are shortened significantly when 5 mL or 10 mL thin barium are swallowed, as compared to 2 mL.

• 

  Fig. 2 The graph shows changes in the penetration-aspiration scale (PAS) according to bolus volume changes. There is no significant relationship between PAS and bolus volume.

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