title: Increased Bolus Volume Effect on Delayed Pharyngeal Swallowing Response in Post-stroke Oropharyngeal Dysphagia: A Pilot Study.
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.
  
  
  CONCLUSIONS
  The increased fluid bolus volume reduced the pharyngeal delay time, but did not affect the penetration and aspiration status.
authors.affiliation: Department of Physical Medicine and Rehabilitation, Dongguk University Ilsan Hospital, Goyang, Korea.
authors.forename: Jin-Woo
authors.identifier: 0000-0003-4989-2575
authors.initials: JW
authors.lastname: Park
authors.affiliation: Department of Physical Medicine and Rehabilitation, Dongguk University Ilsan Hospital, Goyang, Korea.
authors.forename: Gyu-Jeong
authors.identifier: 0000-0003-4083-4934
authors.initials: GJ
authors.lastname: Sim
authors.affiliation: Department of Physical Medicine and Rehabilitation, Dongguk University Ilsan Hospital, Goyang, Korea.
authors.forename: Dong-Chan
authors.identifier: 0000-0001-7733-4066
authors.initials: DC
authors.lastname: Yang
authors.affiliation: Department of Physical Medicine and Rehabilitation, Dongguk University Ilsan Hospital, Goyang, Korea.
authors.forename: Kyoung-Hwan
authors.identifier: 0000-0002-8720-3315
authors.initials: KH
authors.lastname: Lee
authors.affiliation: Department of Physical Medicine and Rehabilitation, Dongguk University Ilsan Hospital, Goyang, Korea.
authors.forename: Ji-Hea
authors.identifier: 0000-0003-0115-0492
authors.initials: JH
authors.lastname: Chang
authors.affiliation: Department of Physical Medicine and Rehabilitation, Dongguk University Ilsan Hospital, Goyang, Korea.
authors.forename: Ki-Yeun
authors.identifier: 0000-0001-6932-6541
authors.initials: KY
authors.lastname: Nam
authors.affiliation: Department of Physical Medicine and Rehabilitation, Dongguk University Ilsan Hospital, Goyang, Korea.
authors.forename: Ho-Jun
authors.identifier: 0000-0002-1997-2593
authors.initials: HJ
authors.lastname: Lee
authors.affiliation: Department of Physical Medicine and Rehabilitation, Dongguk University Ilsan Hospital, Goyang, Korea.
authors.forename: Bum-Sun
authors.identifier: 0000-0001-7755-435X
authors.initials: BS
authors.lastname: Kwon
keywords: Deglutition disorders; Fluoroscopy; Reaction time; Respiratory aspiration; Stroke