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Bolus rheology of texture-modified food - effect of degree of modification.
RISE Research Institutes of Sweden, Bioekonomi och hälsa, Jordbruk och livsmedel. Chalmers University of Technology, Sweden.ORCID-id: 0000-0003-0310-4465
2021 (Engelska)Ingår i: Journal of texture studies, ISSN 0022-4901, E-ISSN 1745-4603, Vol. 52, nr 5-6, s. 540-551Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Swallowing disorders, or dysphagia, require an intake of texture-modified foods progressively softer, smoother and moister depending on the severity of the disorder. Bolus rheology was determined for five healthy subjects for a set of such solid foods regularly given to dysphagia patients. The softest class was gel food, then a smooth timbale which both were compared to the corresponding regular, un-modified food. The foods investigated were bread, cheese, tomato and the combination as a sandwich, all for the respective texture class: gel, timbale and regular food. The subjects chewed until ready to swallow and the expectorated bolus was immediately measured for complex shear modulus and viscosity, and moisture and saliva content were determined. Rheology show that texture-modification influenced bolus rheology with decreased viscosity and modulus for increased degree of modification. Also saliva content as well as chews-to-swallow decreased with degree of modification. Overall, the bolus saliva content was lower for the combination (sandwich) than for the individual components. Saliva content was fairly constant irrespective of food moisture content. The phase angle for all boluses was also relatively constant, indicating a similar bolus structure. All boluses of the texture-modified foods showed high extensional viscosity, which is important for bolus cohesiveness. Bolus rheology rather than food texture determines if a food is safe to swallow and the results show that the intended texture-modification is reflected in the flow properties of the respective boluses. 

Ort, förlag, år, upplaga, sidor
2021. Vol. 52, nr 5-6, s. 540-551
Nyckelord [en]
Bolus, dysphagia, rheology, saliva, solid food, texture-modification
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Livsmedelsvetenskap
Identifikatorer
URN: urn:nbn:se:ri:diva-52642DOI: 10.1111/jtxs.12598PubMedID: 33760231Scopus ID: 2-s2.0-85104319263OAI: oai:DiVA.org:ri-52642DiVA, id: diva2:1548348
Tillgänglig från: 2021-04-30 Skapad: 2021-04-30 Senast uppdaterad: 2023-05-25Bibliografiskt granskad

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