Modelling of swallowing organs and its validation using Swallow Vision<sup>®</sup>, a numerical swallowing simulator

Michiwaki, Yukihiro; Kamiya, Tetsu; Kikuchi, Toru; Toyama, Yoshio; Hanyuu, Keigo; Takai, Megumi; Koshizuka, Seiichi

doi:10.1080/21681163.2018.1466198

Cited by 9 publications

(6 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They also observed that postural strategies can prevent aspiration by diverting the swallowed particles from the midsagittal plane at the laryngeal entry level (Kikuchi et al 2017). Michiwaki et al (2019) obtained the first realistic model of organs, based on CT scan and VFSS images synchronization. They included anatomical boundaries of soft-tissue organs (tongue, soft palate, pharynx, epiglottis, larynx, oesophagus and trachea) and they used a mesh-free moving particle method to simulate bolus flow (Michiwaki et al 2019).…”

Section: Summary Of Biomedical Simulation On Dysphagiamentioning

confidence: 99%

“…Michiwaki et al (2019) obtained the first realistic model of organs, based on CT scan and VFSS images synchronization. They included anatomical boundaries of soft-tissue organs (tongue, soft palate, pharynx, epiglottis, larynx, oesophagus and trachea) and they used a mesh-free moving particle method to simulate bolus flow (Michiwaki et al 2019). This simulation showed that pathological model had a more pronounced upward movement of hyoid bone and larynx.…”

Section: Summary Of Biomedical Simulation On Dysphagiamentioning

confidence: 99%

“…Tongue base had more movement and occurred earlier whereas the closure of the glottis happened later. The pathological model also presented aspiration, a more spread bolus with a faster flow rate and higher quantity of pharyngeal residues (Michiwaki et al 2019).…”

Section: Summary Of Biomedical Simulation On Dysphagiamentioning

confidence: 99%

See 2 more Smart Citations

Review of Research Studies on Biomechanics of Swallowing and Dysphagia

Almeida¹,

Jorge²

2019

UPjeng

View full text Add to dashboard Cite

Dysphagia is a prevalent condition characterised by the dysfunction/ incoordination of the anatomical structures involved in the swallowing biomechanics. Dysphagia can have serious clinical consequences such as pneumonia, malnutrition, dehydration and even death. It implies a high negative impact on patients quality of life and may also represent increased financial costs in order to treat associated complications. It is essential to correctly identify and evaluate patients with this problem. However, the gold standard diagnostic exams present risk of aspiration, they are uncomfortable and invasive, and still present other inherent disadvantages/risks related with the technique itself. The simulation area may contribute to a more detailed knowledge of the swallowing biomechanics and, when applied to pathologic scenarios (i.e. dysphagia), to identify higher risk patients and manage the treatment in a more adequate and specific way. It will also seems to be able to reduce the use of invasive techniques, excessive radiation and associated economical costs. The aim of this paper is to review the existing research studies on biomechanical mechanisms of swallowing and dysphagia. Computer simulation seems to be a solution to better understand these mechanisms and even to reduce clinical disadvantages when compared with the available diagnostic methods used with these patients.

show abstract

Section: Summary Of Biomedical Simulation On Dysphagiamentioning

confidence: 99%

Section: Summary Of Biomedical Simulation On Dysphagiamentioning

confidence: 99%

See 1 more Smart Citation

Review of Research Studies on Biomechanics of Swallowing and Dysphagia

Almeida¹,

Jorge²

2019

UPjeng

View full text Add to dashboard Cite

show abstract

“…No single instrument is so far capable of collecting high-resolution spatial and temporal information about swallowing (Steele 2015). Computer simulation, which is based on data derived from medical images, seems to provide a promising alternative (Kamiya et al 2019;Kikuchi et al 2015Kikuchi et al , 2017Michiwaki et al 2019Michiwaki et al , 2020a. Both the organs and bolus flows can be modeled, and the flow behavior of the bolus is analyzed using fluid simulation and modeling.…”

Section: Introductionmentioning

confidence: 99%

Current Perspectives on Food Oral Processing

Wang

Chen

2022

Annu. Rev. Food Sci. Technol.

View full text Add to dashboard Cite

Food oral processing (FOP) is a fast-emerging research area in the food science discipline. Since its first introduction about a decade ago, a large amount of literature has been published in this area, forming new frontiers and leading to new research opportunities. This review aims to summarize FOP research progress from current perspectives. Food texture, food flavor (aroma and taste), bolus swallowing, and eating behavior are covered in this review. The discussion of each topic is organized into three parts: a short background introduction, reflections on current research findings and achievements, and future directions and implications on food design. Physical, physiological, and psychological principles are the main concerns of discussion for each topic. The last part of the review shares views on the research challenges and outlooks of future FOP research. It is hoped that the review not only helps readers comprehend what has been achieved in the past decade but also, more importantly, identify where the knowledge gaps are and in which direction the FOP research will go.

show abstract

“…The validity of the analyses was confirmed by comparing the motion data obtained by the proposed method with the VF image data. Furthermore, using Swallow Vision, Michiwaki et al (2019) investigated the difference between the movements of the bolus in a healthy male volunteer and a male patient with mild dysphagia. In addition, Swallow Vision has been used to visualize choking on toys in a child (Michiwaki et al, 2020b) and to estimate the behavior of foods with various properties during swallowing in a healthy male volunteer and an elderly patient with aspiration (Michiwaki et al, 2020a).…”

Section: Introductionmentioning

confidence: 99%

Identification of muscle activity in tongue motion during swallowing through medical image data

Azegami

Ono

Takeuchi

et al. 2022

JBSE

Self Cite

View full text Add to dashboard Cite

This paper presents a formulation to identify muscle activities from the variation in shapes of organs during swallowing. We assume that each organ consists of a three-dimensional hyperelastic body, and the contraction movement of the muscle is caused by a contractive inelastic stress in the organ. A function distributed in the organ domain to control the magnitude of the inelastic stress is chosen as a design variable in the same manner as the density in the topology optimization problem of density variation type. The identification problem is formulated as a problem of determining the design variable that minimizes an objective cost function defined by the squared L 2 norm of the reaction force in the normal direction on the boundary when an enforced displacement to fit the varied boundary of the organ and the inelastic stress modeling the muscle activity are applied. The finite deformation problem of the hyperelastic body is analyzed using the finite element method. The direction of the muscle fiber is assumed to be the direction of the minimum principal stress obtained as the solution to the finite deformation problem. The solution to the identification problem is presented based on a scheme using the H 1 gradient method for the topology optimization problem of density variation type. A numerical example using a previously developed model of the tongue is introduced to demonstrate the effectiveness of the proposed approach.

show abstract

Modelling of swallowing organs and its validation using Swallow Vision^®, a numerical swallowing simulator

Cited by 9 publications

References 13 publications

Review of Research Studies on Biomechanics of Swallowing and Dysphagia

Review of Research Studies on Biomechanics of Swallowing and Dysphagia

Current Perspectives on Food Oral Processing

Identification of muscle activity in tongue motion during swallowing through medical image data

Contact Info

Product

Resources

About

Modelling of swallowing organs and its validation using Swallow Vision®, a numerical swallowing simulator

Cited by 9 publications

References 13 publications

Review of Research Studies on Biomechanics of Swallowing and Dysphagia

Review of Research Studies on Biomechanics of Swallowing and Dysphagia

Current Perspectives on Food Oral Processing

Identification of muscle activity in tongue motion during swallowing through medical image data

Contact Info

Product

Resources

About

Modelling of swallowing organs and its validation using Swallow Vision^®, a numerical swallowing simulator