A model experiment to understand the oral phase of swallowing of Newtonian liquids.
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| Title: | A model experiment to understand the oral phase of swallowing of Newtonian liquids. |
|---|---|
| Authors: | Hayoun, P.1, Engmann, J.1, Mowlavi, S.1, Le Reverend, B.1, Burbidge, A.1, Ramaioli, M.1,2 m.ramaioli@surrey.ac.uk |
| Source: | Journal of Biomechanics. Nov2015, Vol. 48 Issue 14, p3922-3928. 7p. |
| Subjects: | Newtonian fluids, Deglutition, Bolus (Digestion), Clinical trials, Fluid mechanics, Viscosity |
| Abstract: | A model experiment to understand the oral phase of swallowing is presented and used to explain some of the mechanisms controlling the swallowing of Newtonian liquids. The extent to which the flow is slowed down by increasing the viscosity of the liquid or the volume is quantitatively studied. The effect of the force used to swallow and of the gap between the palate and the roller used to represent the contracted tongue are also quantified. The residual mass of liquid left after the model swallow rises strongly when increasing the gap and is independent of bolus volume and applied force. An excessively high viscosity results in higher residues, besides succeeding in slowing down the bolus flow. A realistic theory is developed and used to interpret the experimental observations, highlighting the existence of an initial transient regime, at constant acceleration, that can be followed by a steady viscous regime, at constant velocity. The effect of the liquid viscosity on the total oral transit time is lower when the constant acceleration regime dominates bolus flow. Our theory suggests also that tongue inertia is the cause of the higher pressure observed at the back of the tongue in previous studies. The approach presented in this study paves the way toward a mechanical model of human swallowing that would facilitate the design of novel, physically sound, dysphagia treatments and their preliminary screening before in vivo evaluations and clinical trials. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Biomechanics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 111057275 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: A model experiment to understand the oral phase of swallowing of Newtonian liquids. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Hayoun%2C+P%2E%22">Hayoun, P.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Engmann%2C+J%2E%22">Engmann, J.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Mowlavi%2C+S%2E%22">Mowlavi, S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Le+Reverend%2C+B%2E%22">Le Reverend, B.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Burbidge%2C+A%2E%22">Burbidge, A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Ramaioli%2C+M%2E%22">Ramaioli, M.</searchLink><relatesTo>1,2</relatesTo><i> m.ramaioli@surrey.ac.uk</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Biomechanics%22">Journal of Biomechanics</searchLink>. Nov2015, Vol. 48 Issue 14, p3922-3928. 7p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Newtonian+fluids%22">Newtonian fluids</searchLink><br /><searchLink fieldCode="DE" term="%22Deglutition%22">Deglutition</searchLink><br /><searchLink fieldCode="DE" term="%22Bolus+%28Digestion%29%22">Bolus (Digestion)</searchLink><br /><searchLink fieldCode="DE" term="%22Clinical+trials%22">Clinical trials</searchLink><br /><searchLink fieldCode="DE" term="%22Fluid+mechanics%22">Fluid mechanics</searchLink><br /><searchLink fieldCode="DE" term="%22Viscosity%22">Viscosity</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: A model experiment to understand the oral phase of swallowing is presented and used to explain some of the mechanisms controlling the swallowing of Newtonian liquids. The extent to which the flow is slowed down by increasing the viscosity of the liquid or the volume is quantitatively studied. The effect of the force used to swallow and of the gap between the palate and the roller used to represent the contracted tongue are also quantified. The residual mass of liquid left after the model swallow rises strongly when increasing the gap and is independent of bolus volume and applied force. An excessively high viscosity results in higher residues, besides succeeding in slowing down the bolus flow. A realistic theory is developed and used to interpret the experimental observations, highlighting the existence of an initial transient regime, at constant acceleration, that can be followed by a steady viscous regime, at constant velocity. The effect of the liquid viscosity on the total oral transit time is lower when the constant acceleration regime dominates bolus flow. Our theory suggests also that tongue inertia is the cause of the higher pressure observed at the back of the tongue in previous studies. The approach presented in this study paves the way toward a mechanical model of human swallowing that would facilitate the design of novel, physically sound, dysphagia treatments and their preliminary screening before in vivo evaluations and clinical trials. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Biomechanics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.jbiomech.2015.09.022 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 7 StartPage: 3922 Subjects: – SubjectFull: Newtonian fluids Type: general – SubjectFull: Deglutition Type: general – SubjectFull: Bolus (Digestion) Type: general – SubjectFull: Clinical trials Type: general – SubjectFull: Fluid mechanics Type: general – SubjectFull: Viscosity Type: general Titles: – TitleFull: A model experiment to understand the oral phase of swallowing of Newtonian liquids. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Hayoun, P. – PersonEntity: Name: NameFull: Engmann, J. – PersonEntity: Name: NameFull: Mowlavi, S. – PersonEntity: Name: NameFull: Le Reverend, B. – PersonEntity: Name: NameFull: Burbidge, A. – PersonEntity: Name: NameFull: Ramaioli, M. IsPartOfRelationships: – BibEntity: Dates: – D: 05 M: 11 Text: Nov2015 Type: published Y: 2015 Identifiers: – Type: issn-print Value: 00219290 Numbering: – Type: volume Value: 48 – Type: issue Value: 14 Titles: – TitleFull: Journal of Biomechanics Type: main |
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