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Briot N, Chagnon G, Connesson N, Payan Y. In vivo measurement of breast tissues stiffness using a light aspiration device. Clin Biomech (Bristol, Avon) 2022; 99:105743. [PMID: 36099706 DOI: 10.1016/j.clinbiomech.2022.105743] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 08/12/2022] [Indexed: 02/07/2023]
Abstract
BACKGROUND This paper addresses the question of the in vivo measurement of breast tissue stiffness, which has been poorly adressed until now, except for elastography imaging which has shown promising results but which is still difficult for clinicians to use on a day-to-day basis. Estimating subject-specific tissue stiffness is indeed a critical area of research due to the development of a large number of Finite Element (FE) breast models for various medical applications. METHODS This paper proposes to use an original aspiration device, put into contact with breast surface, and to estimate tissue stiffness using an inverse analysis of the aspiration experiment. The method assumes that breast tissue is composed of a bilayered structure made of fatty and fribroglandular tissues (lower layer) superimposed with the skin (upper layer). Young moduli of both layers are therefore estimated based on repeating low intensity suction tests (<40 mbar) of breast tissues using cups of 7 different diameters. FINDINGS Seven volunteers were involved in this pilot study with average Young moduli of 56.3 kPa ± 16.4 and 3.04 kPa ± 1.17 respectively for the skin and the fatty and fibroglandular tissue. The measurements were carried out in a reasonable time scale (<60 min in total) without any discomfort perceived by the participants. These encouraging results should be confirmed in a clinical study that will include a much larger number of volunteers and patients.
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Affiliation(s)
- N Briot
- Univ. Grenoble Alpes, CNRS, UMR 5525, VetAgro Sup, Grenoble INP, TIMC, 38000 Grenoble, France.
| | - G Chagnon
- Univ. Grenoble Alpes, CNRS, UMR 5525, VetAgro Sup, Grenoble INP, TIMC, 38000 Grenoble, France
| | - N Connesson
- Univ. Grenoble Alpes, CNRS, UMR 5525, VetAgro Sup, Grenoble INP, TIMC, 38000 Grenoble, France
| | - Y Payan
- Univ. Grenoble Alpes, CNRS, UMR 5525, VetAgro Sup, Grenoble INP, TIMC, 38000 Grenoble, France
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2
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Hérault J, Gérard A, Carnicer A, Aloi D, Peyrichon ML, Barnel C, Vidal M, Angellier G, Fayaud D, Grini JC, Giusto A, Armando C, Donadey G, Cabannes M, Dumas S, Payan Y, Di Carlo JF, Salicis C, Bergerot JM, Rolion M, Trimaud R, Hofverberg P, Mandrillon P, Sauerwein W, Thariat J. 30 years of ocular proton therapy, the Nice view. Cancer Radiother 2022; 26:1016-1026. [PMID: 35803860 DOI: 10.1016/j.canrad.2022.03.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 03/15/2022] [Indexed: 11/08/2022]
Abstract
PURPOSE Radiotherapy with protons (PT) is a standard treatment of ocular tumors. It achieves excellent tumor control, limited toxicities, and the preservation of important functional outcomes, such as vision. Although PT may appear as one homogenous technique, it can be performed using dedicated ocular passive scattering PT or, increasingly, Pencil Beam Scanning (PBS), both with various degrees of patient-oriented customization. MATERAIAL AND METHODS MEDICYC PT facility of Nice are detailed with respect to their technical, dosimetric, microdosimetric and radiobiological, patient and tumor-customization process of PT planning and delivery that are key. 6684 patients have been treated for ocular tumors (1991-2020). Machine characteristics (accelerator, beam line, beam monitoring) allow efficient proton extraction, high dose rate, sharp lateral and distal penumbrae, and limited stray radiation in comparison to beam energy reduction and subsequent straggling with high-energy PBS PT. Patient preparation before PT includes customized setup and image-guidance, CT-based planning, and ocular PT software modelling of the patient eye with integration of beam modifiers. Clinical reports have shown excellent tumor control rates (∼95%), vision preservation and limited toxicity rates (papillopathy, retinopathy, neovascular glaucoma, dry eye, madarosis, cataract). RESULTS Although demanding, dedicated ocular PT has proven its efficiency in achieving excellent tumor control, OAR sparing and patient radioprotection. It is therefore worth adaptations of the equipments and practice. CONCLUSIONS Some of these adaptations can be transferred to other PT centers and should be acknowledeged when using non-PT options.
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Affiliation(s)
- J Hérault
- Institut Méditerranéen de ProtonThérapie, Centre Antoine Lacassagne, 227, avenue de la Lanterne, 06200 Nice, France.
| | - A Gérard
- Institut Méditerranéen de ProtonThérapie, Centre Antoine Lacassagne, 227, avenue de la Lanterne, 06200 Nice, France
| | - A Carnicer
- IDOM Consulting, Engineering, Architecture, Avinguda de la Fama, 11-15, Arboretum Business Park, Arce Building, 08940 Cornellà de Llobregat, Barcelona, Spain
| | - D Aloi
- Institut Méditerranéen de ProtonThérapie, Centre Antoine Lacassagne, 227, avenue de la Lanterne, 06200 Nice, France
| | - M-L Peyrichon
- Institut Méditerranéen de ProtonThérapie, Centre Antoine Lacassagne, 227, avenue de la Lanterne, 06200 Nice, France
| | - C Barnel
- Institut Méditerranéen de ProtonThérapie, Centre Antoine Lacassagne, 227, avenue de la Lanterne, 06200 Nice, France
| | - M Vidal
- Institut Méditerranéen de ProtonThérapie, Centre Antoine Lacassagne, 227, avenue de la Lanterne, 06200 Nice, France
| | - G Angellier
- Institut Méditerranéen de ProtonThérapie, Centre Antoine Lacassagne, 227, avenue de la Lanterne, 06200 Nice, France
| | - D Fayaud
- Institut Méditerranéen de ProtonThérapie, Centre Antoine Lacassagne, 227, avenue de la Lanterne, 06200 Nice, France
| | - J-C Grini
- Institut Méditerranéen de ProtonThérapie, Centre Antoine Lacassagne, 227, avenue de la Lanterne, 06200 Nice, France
| | - A Giusto
- Institut Méditerranéen de ProtonThérapie, Centre Antoine Lacassagne, 227, avenue de la Lanterne, 06200 Nice, France
| | - C Armando
- Institut Méditerranéen de ProtonThérapie, Centre Antoine Lacassagne, 227, avenue de la Lanterne, 06200 Nice, France
| | - G Donadey
- Institut Méditerranéen de ProtonThérapie, Centre Antoine Lacassagne, 227, avenue de la Lanterne, 06200 Nice, France
| | - M Cabannes
- Institut Méditerranéen de ProtonThérapie, Centre Antoine Lacassagne, 227, avenue de la Lanterne, 06200 Nice, France
| | - S Dumas
- Institut Méditerranéen de ProtonThérapie, Centre Antoine Lacassagne, 227, avenue de la Lanterne, 06200 Nice, France
| | - Y Payan
- Institut Méditerranéen de ProtonThérapie, Centre Antoine Lacassagne, 227, avenue de la Lanterne, 06200 Nice, France
| | - J-F Di Carlo
- Institut Méditerranéen de ProtonThérapie, Centre Antoine Lacassagne, 227, avenue de la Lanterne, 06200 Nice, France
| | - C Salicis
- Institut Méditerranéen de ProtonThérapie, Centre Antoine Lacassagne, 227, avenue de la Lanterne, 06200 Nice, France
| | - J-M Bergerot
- Institut Méditerranéen de ProtonThérapie, Centre Antoine Lacassagne, 227, avenue de la Lanterne, 06200 Nice, France
| | - M Rolion
- Institut Méditerranéen de ProtonThérapie, Centre Antoine Lacassagne, 227, avenue de la Lanterne, 06200 Nice, France
| | - R Trimaud
- Institut Méditerranéen de ProtonThérapie, Centre Antoine Lacassagne, 227, avenue de la Lanterne, 06200 Nice, France
| | - P Hofverberg
- Institut Méditerranéen de ProtonThérapie, Centre Antoine Lacassagne, 227, avenue de la Lanterne, 06200 Nice, France
| | - P Mandrillon
- AIMA Development, 227, avenue de la Lanterne, 06200 Nice, France
| | - W Sauerwein
- NCTeam, Strahlenklinik, Universitätsklinikum Essen, Hufelandstraße 55, 45122 Essen, Germany
| | - J Thariat
- Department of Radiation Oncology, Centre François Baclesse, 14000 Caen, France; Laboratoire de Physique Corpusculaire IN2P3/ENSICAEN-UMR6534-Unicaen-Normandie Université, 14000 Caen, France
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3
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Briot N, Chagnon G, Burlet L, Gil H, Girard E, Payan Y. Experimental characterisation and modelling of breast Cooper's ligaments. Biomech Model Mechanobiol 2022; 21:1157-1168. [PMID: 35482144 PMCID: PMC9047630 DOI: 10.1007/s10237-022-01582-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 03/25/2022] [Indexed: 11/24/2022]
Abstract
The aim of this study was to characterise the mechanical behaviour of Cooper's ligaments. Such ligaments are collagenous breast tissue that create a three-dimensional structure over the entire breast volume. Ten ligaments were extracted from a human cadaver, from which 28 samples were cut and used to perform uniaxial tensile tests. Histological analysis showed that the main direction of the fibres visible to the naked eye corresponds to the orientation of the fibres on a microscopic scale. The specimens were cut according to this orientation, which allowed the sample to be stretched in the main fibre direction. From these experimental stretch/stress curves, an original anisotropic hyperelastic constitutive law is proposed to model the behaviour of Cooper's ligaments and the material parameter validity is discussed.
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Affiliation(s)
- N Briot
- University of Grenoble Alpes, CNRS, UMR 5525, VetAgro Sup, Grenoble INP, TIMC, 38000, Grenoble, France.
| | - G Chagnon
- University of Grenoble Alpes, CNRS, UMR 5525, VetAgro Sup, Grenoble INP, TIMC, 38000, Grenoble, France
| | - L Burlet
- Laboratoire d'Anatomie des Alpes Française, Faculté de Médecine, Domaine de la Merci, 38700, La Tronche Cedex, France
| | - H Gil
- Département d'anatomopathologie et cytologie, Centre Hospitalier Grenoble-Alpes, 38000, Grenoble, France
| | - E Girard
- University of Grenoble Alpes, CNRS, UMR 5525, VetAgro Sup, Grenoble INP, CHU Grenoble Alpes, TIMC, 38000, Grenoble, France.,Laboratoire d'Anatomie des Alpes Française, Faculté de Médecine, Domaine de la Merci, 38700, La Tronche Cedex, France
| | - Y Payan
- University of Grenoble Alpes, CNRS, UMR 5525, VetAgro Sup, Grenoble INP, TIMC, 38000, Grenoble, France
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4
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Kappert KDR, Connesson N, Elahi SA, Boonstra S, Balm AJM, van der Heijden F, Payan Y. In-vivo tongue stiffness measured by aspiration: Resting vs general anesthesia. J Biomech 2020; 114:110147. [PMID: 33276256 DOI: 10.1016/j.jbiomech.2020.110147] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 11/16/2020] [Accepted: 11/21/2020] [Indexed: 11/29/2022]
Abstract
Tongue cancer treatment often results in impaired speech, swallowing, or mastication. Simulating the effect of treatments can help the patient and the treating physician to understand the effects and impact of the intervention. To simulate deformations of the tongue, identifying accurate mechanical properties of tissue is essential. However, not many succeeded in characterizing in-vivo tongue stiffness. Those who did, measured the tongue At Rest (AR), in which muscle tone subsides even if muscles are not willingly activated. We expected to find an absolute rest state in participants 'under General Anesthesia' (GA). We elaborated on previous work by measuring the mechanical behavior of the in-vivo tongue under aspiration using an improved volume-based method. Using this technique, 5 to 7 measurements were performed on 10 participants both AR and under GA. The obtained Pressure-Shape curves were first analyzed using the initial slope and its variations. Hereafter, an inverse Finite Element Analysis (FEA) was applied to identify the mechanical parameters using the Yeoh, Gent, and Ogden hyperelastic models. The measurements AR provided a mean Young's Modulus of 1638 Pa (min 1035 - max 2019) using the Yeoh constitutive model, which is in line with previous ex-vivo measurements. However, while hoping to find a rest state under GA, the tongue unexpectedly appeared to be approximately 2 to 2.5 times stiffer under GA than AR. Explanations for this were sought by examining drugs administered during GA, blood flow, perfusion, and upper airway reflexes, but neither of these explanations could be confirmed.
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Affiliation(s)
- K D R Kappert
- Head & Neck Oncology and Surgery, Netherlands Cancer Institute, Amsterdam, The Netherlands; Robotics and Mechatronics, Technical Medical Centre, University of Twente, Enschede, The Netherlands.
| | - N Connesson
- TIMC-IMAG Laboratory, University Grenoble Alpes & CNRS, Grenoble, France
| | - S A Elahi
- Human Movement Science Department, Mechanical Engineering Department, KU Leuven, Leuven, Belgium
| | - S Boonstra
- Head & Neck Oncology and Surgery, Netherlands Cancer Institute, Amsterdam, The Netherlands; Robotics and Mechatronics, Technical Medical Centre, University of Twente, Enschede, The Netherlands
| | - A J M Balm
- Head & Neck Oncology and Surgery, Netherlands Cancer Institute, Amsterdam, The Netherlands; Robotics and Mechatronics, Technical Medical Centre, University of Twente, Enschede, The Netherlands; Oral and Maxillofacial Surgery, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - F van der Heijden
- Head & Neck Oncology and Surgery, Netherlands Cancer Institute, Amsterdam, The Netherlands; Robotics and Mechatronics, Technical Medical Centre, University of Twente, Enschede, The Netherlands
| | - Y Payan
- TIMC-IMAG Laboratory, University Grenoble Alpes & CNRS, Grenoble, France
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5
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Mukhina E, Rohan PY, Connesson N, Payan Y. Calibration of the fat and muscle hyperelastic material parameters for the assessment of the internal tissue deformation in relation to pressure ulcer prevention. Comput Methods Biomech Biomed Engin 2020. [DOI: 10.1080/10255842.2020.1813426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- E. Mukhina
- Univ. Grenoble Alpes, CNRS, Grenoble INP, TIMC-IMAG, Grenoble, France
- Institut de Biomécanique Humaine Georges Charpak, Paris, France
| | - P.-Y. Rohan
- Institut de Biomécanique Humaine Georges Charpak, Paris, France
| | - N. Connesson
- Univ. Grenoble Alpes, CNRS, Grenoble INP, TIMC-IMAG, Grenoble, France
| | - Y. Payan
- Univ. Grenoble Alpes, CNRS, Grenoble INP, TIMC-IMAG, Grenoble, France
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6
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Briot N, Chagnon G, Masri C, Girard E, Payan Y. Ex-vivo mechanical characterisation of the breast Cooper’s ligaments. Comput Methods Biomech Biomed Engin 2020. [DOI: 10.1080/10255842.2020.1812155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- N. Briot
- Université Grenoble Alpes, CNRS, TIMC-IMAG, Grenoble, France
| | - G. Chagnon
- Université Grenoble Alpes, CNRS, TIMC-IMAG, Grenoble, France
| | - C. Masri
- Université Grenoble Alpes, CNRS, TIMC-IMAG, Grenoble, France
| | - E. Girard
- Université Grenoble Alpes, CNRS, TIMC-IMAG, Grenoble, France
- Faculté de Médecine, Laboratoire d’Anatomie des Alpes Française, La Tronche Cedex, France
| | - Y. Payan
- Université Grenoble Alpes, CNRS, TIMC-IMAG, Grenoble, France
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7
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Nazari MA, Perrier P, Meadows J, Christen MO, Mojallal A, Payan Y. Studying the effects of facial muscles activations to investigate the optimum positioning of subcutaneous suspension sutures. Comput Methods Biomech Biomed Engin 2020. [DOI: 10.1080/10255842.2020.1822050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- M. A. Nazari
- Department of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
- Univ. Grenoble Alpes, CNRS, Grenoble-INP, GIPSA-LAB, Grenoble, France
| | - P. Perrier
- Univ. Grenoble Alpes, CNRS, Grenoble-INP, TIMC-IMAG, Grenoble, France
| | - J. Meadows
- Sinclair Pharmaceutical Ltd, Chester, UK
| | | | - A. Mojallal
- Department of Plastic and Adhesive Surgery, Croix-Rousse Hospital, Hospices Civils de Lyon, Université Claude Bernard, Lyon 1, France
| | - Y. Payan
- Univ. Grenoble Alpes, CNRS, Grenoble-INP, GIPSA-LAB, Grenoble, France
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8
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Calka M, Perrier P, Ohayon J, Grivot Boichon C, Rochette M, Payan Y. Real-time simulations of human tongue movements with a reduced order model of a non-linear dynamic biomechanical model. Comput Methods Biomech Biomed Engin 2020. [DOI: 10.1080/10255842.2020.1812158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- M. Calka
- Univ. Grenoble Alpes, CNRS, Grenoble INP, TIMC-IMAG, Grenoble, France
- Univ. Grenoble Alpes, CNRS, Grenoble INP, GIPSA-lab, Grenoble, France
- ANSYS, Villeurbanne, France
| | - P. Perrier
- Univ. Grenoble Alpes, CNRS, Grenoble INP, GIPSA-lab, Grenoble, France
| | - J. Ohayon
- Univ. Grenoble Alpes, CNRS, Grenoble INP, TIMC-IMAG, Grenoble, France
- Polytech Annecy-Chambéry, Savoie Mont-Blanc University, Le Bourget du Lac, France
| | | | | | - Y. Payan
- Univ. Grenoble Alpes, CNRS, Grenoble INP, TIMC-IMAG, Grenoble, France
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9
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Elyasi E, Perrier A, Payan Y. The effect of rectus femoris muscle modelling technique on knee joint kinematics: a preliminary study. Comput Methods Biomech Biomed Engin 2019. [DOI: 10.1080/10255842.2020.1714236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- E. Elyasi
- CNRS, TIMC-IMAG, Université Grenoble Alpes, Grenoble, France
| | - A. Perrier
- CNRS, TIMC-IMAG, Université Grenoble Alpes, Grenoble, France
- Texisense, France
| | - Y. Payan
- CNRS, TIMC-IMAG, Université Grenoble Alpes, Grenoble, France
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10
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Perrier A, Gatin L, Bucki M, Geffrier A, Denormandie P, Payan Y. Biomechanical modeling of the diabetic foot ulcer risk to guide surgery. Comput Methods Biomech Biomed Engin 2019. [DOI: 10.1080/10255842.2020.1714256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- A. Perrier
- Univ. Grenoble Alpes, CNRS, TIMC-IMAG, Grenoble, France
- Orthopaedic Unit, Croix Saint-Simon hospital, Paris
- TexiSense, Torcy, France
| | - L. Gatin
- Orthopaedic Unit, Raymond Poincaré Hospital, Garches, France
| | | | - A. Geffrier
- Orthopaedic Unit, Raymond Poincaré Hospital, Garches, France
| | - P. Denormandie
- Orthopaedic Unit, Raymond Poincaré Hospital, Garches, France
| | - Y. Payan
- Univ. Grenoble Alpes, CNRS, TIMC-IMAG, Grenoble, France
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11
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Moreau-Gaudry A, Chenu O, Dang MV, Bosson JL, Hommel M, Demongeot J, Cannard F, Diot B, Prince A, Hughes C, Vuillerme N, Payan Y. Reduction of Prolonged Excessive Pressure in Seated Persons With Paraplegia Using Wireless Lingual Tactile Feedback: A Randomized Controlled Trial. IEEE J Transl Eng Health Med 2018; 6:2100611. [PMID: 29984117 PMCID: PMC6033051 DOI: 10.1109/jtehm.2018.2842746] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 04/26/2018] [Accepted: 05/25/2018] [Indexed: 11/10/2022]
Abstract
Pressure ulcers (PU) are known to be a high-cost disease with a risk of severe morbidity. This paper evaluates a new clinical strategy based on an innovative medical device [Tongue Display Unit (TDU)] that implements perceptive supplementation in order to reduce prolonged excessive pressure, recognized as one of the main causes of PU. A randomized, controlled, and parallel-group trial was carried out with 12 subjects with spinal cord injuries (SCI). Subjects were assigned to the control (without TDU, [Formula: see text]) or intervention (with TDU, [Formula: see text]) group. Each subject took part in two sessions, during which the subject, seated on a pressure map sensor, watched a movie for one hour. The TDU was activated during the second session of the intervention group. Intention-to-treat analysis showed that the improvement in adequate weight shifting between the two sessions was higher in the intervention group (0.84 [0.24; 0.89]) than in the control group (0.01 [-0.01; 0.09]; [Formula: see text]) and that the ratio of prolonged excessive pressure between the two sessions was lower in the intervention group (0.74 [0.37; 1.92]) than in the control group (1.72 [1.32; 2.56]; [Formula: see text]). The pressure map sensor was evaluated as being convenient for use in daily life; however, this was not the case for the TDU. This paper shows that persons with SCI could benefit from a system based on perceptive supplementation that alerts and guides the user on how to adapt their posture in order to reduce prolonged excessive pressure, one of the main causes of PU.
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Affiliation(s)
- A Moreau-Gaudry
- INSERM CIC 140638000GrenobleFrance.,Grenoble Alpes University Hospital38700La TroncheFrance.,Université Grenoble Alpes, TIMC-IMAG38400GrenobleFrance.,CNRSTIMC-IMAG38706La TroncheFrance
| | - O Chenu
- TexiSense S.A. Company71300Montceau-les-minesFrance
| | - M V Dang
- Centre Hospitalier de Saint-Laurent-du-Pont38380Saint-Laurent-du-PontFrance
| | - J-L Bosson
- INSERM CIC 140638000GrenobleFrance.,Grenoble Alpes University Hospital38700La TroncheFrance.,Université Grenoble Alpes, TIMC-IMAG38400GrenobleFrance.,CNRSTIMC-IMAG38706La TroncheFrance
| | - M Hommel
- INSERM CIC 140638000GrenobleFrance.,Grenoble Alpes University Hospital38700La TroncheFrance
| | - J Demongeot
- Université Grenoble Alpes, TIMC-IMAG38400GrenobleFrance.,Institut Universitaire de France75231ParisFrance
| | - F Cannard
- TexiSense S.A. Company71300Montceau-les-minesFrance
| | - B Diot
- IDS S.A.71300Montceau-les-minesFrance
| | - A Prince
- Clinique du Grésivaudan38700La TroncheFrance
| | - C Hughes
- INSERM CIC 140638000GrenobleFrance.,Université Grenoble Alpes, CIC 140638000GrenobleFrance.,Grenoble Alpes University Hospital, CIC 140638000GrenobleFrance
| | - N Vuillerme
- Institut Universitaire de France75231ParisFrance.,Université Grenoble Alpes, AEGIS38400GrenobleFrance
| | - Y Payan
- Université Grenoble Alpes, TIMC-IMAG38400GrenobleFrance.,CNRSTIMC-IMAG38706La TroncheFrance
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Morin F, Courtecuisse H, Chabanas M, Payan Y. Rest shape computation for highly deformable model of brain. Comput Methods Biomech Biomed Engin 2015; 18 Suppl 1:2006-7. [DOI: 10.1080/10255842.2015.1070591] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- F. Morin
- TIMC-IMAG, Univ. Grenoble Alpes, CNRS, Grenoble, France
- AVR-ICube, Univ. Strasbourg, CNRS, Strasbourg, France
| | | | - M. Chabanas
- TIMC-IMAG, Univ. Grenoble Alpes, CNRS, Grenoble, France
| | - Y. Payan
- TIMC-IMAG, Univ. Grenoble Alpes, CNRS, Grenoble, France
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13
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Perrier A, Bucki M, Luboz V, Vuillerme N, Payan Y. 3D musculoskeletal finite element analysis of the foot kinematics under muscle activation with and without ankle arthrodesis. Comput Methods Biomech Biomed Engin 2015; 18:2022-2023. [PMID: 26273957 DOI: 10.1080/10255842.2015.1069605] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- A Perrier
- a CNRS, TIMC-IMAG, Univ. Grenoble Alpes , Grenoble , France.,b UJF-Grenoble1/AGIM , Grenoble , France.,c TexiSense, Montceau-les-Mines , France
| | - M Bucki
- c TexiSense, Montceau-les-Mines , France
| | - V Luboz
- c TexiSense, Montceau-les-Mines , France
| | - N Vuillerme
- b UJF-Grenoble1/AGIM , Grenoble , France.,d Institut Universitaire de France , Paris , France
| | - Y Payan
- a CNRS, TIMC-IMAG, Univ. Grenoble Alpes , Grenoble , France
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Perrier A, Luboz V, Bucki M, Vuillerme N, Payan Y. Conception and evaluation of a 3D musculoskeletal finite element foot model. Comput Methods Biomech Biomed Engin 2015; 18 Suppl 1:2024-5. [DOI: 10.1080/10255842.2015.1069606] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- A. Perrier
- Univ. Grenoble Alpes, CNRS, TIMC-IMAG, Grenoble, France
- UJF-Grenoble1/AGIM, Grenoble, France
- TexiSense, Montceau-les-Mines, France
| | - V. Luboz
- TexiSense, Montceau-les-Mines, France
| | - M. Bucki
- TexiSense, Montceau-les-Mines, France
| | - N. Vuillerme
- UJF-Grenoble1/AGIM, Grenoble, France
- Institut Universitaire de France, Paris, France
| | - Y. Payan
- Univ. Grenoble Alpes, CNRS, TIMC-IMAG, Grenoble, France
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Antherieu G, Connesson N, Payan Y, Favier D, Mozer P. NiTi based stent for the treatment of acute urinary retention due to benign prostatic hyperplasia: a preliminary study on NiTi wires and tubes under pure bending. Comput Methods Biomech Biomed Engin 2015; 17 Suppl 1:190-1. [PMID: 25580555 DOI: 10.1080/10255842.2014.931679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- G Antherieu
- a Laboratoire TIMC/IMAG, UMR CNRS 5525, Faculté de Médecine Domaine de la Merci , La Tronche , France
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Luboz V, Promayon E, Payan Y. Linear elastic properties of the facial soft tissues using an aspiration device: towards patient specific characterization. Ann Biomed Eng 2014; 42:2369-78. [PMID: 25186433 DOI: 10.1007/s10439-014-1098-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Accepted: 08/19/2014] [Indexed: 11/25/2022]
Abstract
Biomechanical modeling of the facial soft tissue behavior is needed in aesthetic or maxillo-facial surgeries where the simulation of the bone displacements cannot accurately predict the visible outcome on the patient's face. Because these tissues have different nature and elastic properties across the face, depending on their thickness, and their content in fat or muscle, individualizing their mechanical parameters could increase the simulation accuracy. Using a specifically designed aspiration device, the facial soft tissues deformation is measured at four different locations (cheek, cheekbone, forehead, and lower lip) on 16 young subjects. The stiffness is estimated from the deformations generated by a set of negative pressures using an inverse analysis based on a Neo Hookean model. The initial Young's modulus of the cheek, cheekbone, forehead, and lower lip are respectively estimated to be 31.0 kPa±4.6, 34.9 kPa±6.6, 17.3 kPa±4.1, and 33.7 kPa±7.3. Significant intra-subject differences in tissue stiffness are highlighted by these estimations. They also show important inter-subject variability for some locations even when mean stiffness values show no statistical difference. This study stresses the importance of using a measurement device capable of evaluating the patient specific tissue stiffness during an intervention.
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Affiliation(s)
- V Luboz
- UJF-Grenoble1/CNRS/TIMC-IMAG UMR 5525, Grenoble, 38041, France,
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Rohan PY, Lobos C, Nazari MA, Perrier P, Payan Y. Finite element modelling of nearly incompressible materials and volumetric locking: a case study. Comput Methods Biomech Biomed Engin 2014; 17 Suppl 1:192-3. [DOI: 10.1080/10255842.2014.931682] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Chekhchoukh A, Goumidi M, Vuillerme N, Payan Y, Glade N. Electrotactile vision substitution for 3D trajectory following. Annu Int Conf IEEE Eng Med Biol Soc 2013; 2013:6413-6. [PMID: 24111209 DOI: 10.1109/embc.2013.6611022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Navigation for blind persons represents a challenge for researchers in vision substitution. In this field, one of the used techniques to navigate is guidance. In this study, we develop a new approach for 3D trajectory following in which the requested task is to track a light path using computer input devices (keyboard and mouse) or a rigid body handled in front of a stereoscopic camera. The light path is visualized either on direct vision or by way of a electro-stimulation device, the Tongue Display Unit, a 12 × 12 matrix of electrodes. We improve our method by a series of experiments in which the effect of the modality of perception and that of the input device. Preliminary results indicated a close correlation between the stimulated and recorded trajectories.
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Luboz V, Perrier A, Stavness I, Lloyd J, Bucki M, Cannard F, Diot B, Vuillerme N, Payan Y. Foot ulcer prevention using biomechanical modelling. Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization 2013. [DOI: 10.1080/21681163.2013.837410] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Luboz V, Perrier A, Bucki M, Cannard F, Diot B, Vuillerme N, Payan Y. Dynamic biomechanical modelling for foot ulcer prevention. Comput Methods Biomech Biomed Engin 2013; 16 Suppl 1:149-51. [DOI: 10.1080/10255842.2013.815863] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Bucki M, Payan Y, Cannard F, Diot B, Vuillerme N. Multi-modal framework for subject-specific finite element model generation aimed at pressure ulcer prevention. Comput Methods Biomech Biomed Engin 2013; 16 Suppl 1:147-8. [DOI: 10.1080/10255842.2013.815861] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Vallier S, Troccaz J, Gabelle-Flandin I, Payan Y. Biomechanical breast modelling to improve patient positioning during breast cancer radiotherapy. Comput Methods Biomech Biomed Engin 2013; 16 Suppl 1:278-9. [DOI: 10.1080/10255842.2013.815862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Chekhchoukh A, Vuillerme N, Payan Y, Glade N. Effect of saccades in tongue electrotactile stimulation for vision substitution applications. Annu Int Conf IEEE Eng Med Biol Soc 2013; 2013:3543-3546. [PMID: 24110494 DOI: 10.1109/embc.2013.6610307] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The visual substitution paradigm aims to facilitate the life of blind people. Generally one uses electro-stimulating devices where electrodes are arranged into arrays to stimulate the skin or the tongue mucosa to send signals of visual type to the subjects. When an electro-stimulation signal is applied continuously (e.g. when static visual scenes are displayed for a long period of time), the receptors of the affected region can get saturated and the patient may lose the displayed information. We propose here some mechanisms that ameliorate the quality of perception of the electro-stimulation information. The electrical signal is encoded as 2D scenes projected onto the tongue via a Tongue Display Unit, i.e. an electro-tactile stimulator formed by a 12×12 matrix of electrodes. We propose to apply stochastic saccades on this signal. Our assumption is that this eye-inspired mechanism should make the visual substitution more efficient (by improving the perception) because of the reduction of the tactile receptors saturation. The influence of saccades was evaluated by a series of experiments. Results revealed a benefit on the persistence of perception due to saccades. This work helps to prevent the saturation of receptors on the tongue. Therefore increasing the quality of vision by the way of the electro-stimulation. It allows new enhancement features to retinal prosthesis devices which suffer from the same phenomenon.
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Luboz V, Perrier A, Vuillerme N, Bucki M, Cannard F, Payan Y. Modélisation biomécanique du pied pour étudier l’influence des orthèses. Ann Phys Rehabil Med 2012. [DOI: 10.1016/j.rehab.2012.07.275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Barth I, Bensmail D, Hlavackova P, Payan Y, Vuillerme N. Représentations de l’incidence de l’escarre d’origine neurologique sur les pratiques soignantes : premiers résultats d’une enquête exploratoire menée au sein d’un service de MPR. Ann Phys Rehabil Med 2012. [DOI: 10.1016/j.rehab.2012.07.363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Barth I, Bensmail D, Hlavackova P, Payan Y, Vuillerme N. Impact of the perception of bed sores in patients with neurological pathology on medical practice: Preliminary results of an exploratory survey in a PMR department. Ann Phys Rehabil Med 2012. [DOI: 10.1016/j.rehab.2012.07.368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Bucki M, Luboz V, Lobos C, Vuillerme N, Cannard F, Diot B, Payan Y. Patient-specific finite element model of the buttocks for pressure ulcer prevention – linear versus non-linear modelling. Comput Methods Biomech Biomed Engin 2012; 15 Suppl 1:38-40. [DOI: 10.1080/10255842.2012.713681] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Deram A, Luboz V, Promayon E, Payan Y. Using a 3D biomechanical model to improve a light aspiration device for in vivosoft tissue characterisation. Comput Methods Biomech Biomed Engin 2012; 15 Suppl 1:41-3. [DOI: 10.1080/10255842.2012.713711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Luboz V, Perrier A, Vuillerme N, Bucki M, Diot B, Cannard F, Payan Y. Foot biomechanical modelling to study orthoses influence. Comput Methods Biomech Biomed Engin 2012; 15 Suppl 1:360-2. [DOI: 10.1080/10255842.2012.713689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Vuillerme N, Hlavackova P, Franco C, Diot B, Demongeot J, Payan Y. Can an electro-tactile vestibular substitution system improve balance in patients with unilateral vestibular loss under altered somatosensory conditions from the foot and ankle? Annu Int Conf IEEE Eng Med Biol Soc 2012; 2011:1323-6. [PMID: 22254560 DOI: 10.1109/iembs.2011.6090311] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This pilot study aimed at assessing the feasibility and the effectiveness of an electro Electro-tactile Vestibular Substitution System (EVSS) in patients with unilateral vestibular loss under normal and altered somatosensory conditions from the foot and ankle. Four unilateral vestibular-defective patients voluntarily participated in the experiment. They were asked to stand upright as still as possible with their eyes closed in two Normal and Altered foot and ankle sensory conditions. In the Normal condition, the postural task was executed on a firm support surface constituted by the force platform. In the Altered condition, a 2-cm thick foam support surface was placed under the participants' feet. These two foot and ankle sensory conditions were executed under two No EVSS and EVSS experimental conditions. The No EVSS condition served as a control condition. In the EVSS condition, participants executed the postural task using a biofeedback system whose underlying principle consisted of supplying them with additional information about their head orientation/motion with respect to gravitational vertical through electro-tactile stimulation of their tongue. Centre of foot pressure displacements (CoP) were recorded using the force platform. Results showed that, relative to the No EVSS condition, the EVSS condition decreased CoP displacements in both the Normal and the Altered foot and ankle sensory conditions. Interestingly, the stabilizing effect was more pronounced in the Altered than in the Normal foot and ankle sensory condition. These preliminary results suggest that patients with unilateral vestibular loss were able to take advantage to a head position-based electro-tactile tongue biofeedback to mitigate the postural perturbation induced by alteration of somatosensory input from the foot and the ankle.
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Affiliation(s)
- N Vuillerme
- TIMC-IMAG Laboratory, UMR UJF CNRS 5525, Grenoble, France.
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Bucki M, Vuillerme N, Cannard F, Diot B, Becquet G, Payan Y. The TexiSense « Smart Sock » - a device for a daily prevention of pressure ulcers in the diabetic foot. Ann Phys Rehabil Med 2011. [DOI: 10.1016/j.rehab.2011.07.544] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Bucki M, Vuillerme N, Cannard MF, Diot MB, Becquet G, Payan Y. La « chaussette intelligente » TexiSense : un dispositif pour la prévention au quotidien des ulcères plantaires de la personne diabétique. Ann Phys Rehabil Med 2011. [DOI: 10.1016/j.rehab.2011.07.540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Chenu O, Bucki M, Vuillerme N, Cannard F, Diot B, Colin D, Payan Y. Pressure ulcer prevention in spinal cord injury subjects using the TexiSense pressure sensing textile. Ann Phys Rehabil Med 2011. [DOI: 10.1016/j.rehab.2011.07.325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Chenu O, Bucki M, Vuillerme N, Cannard F, Diot B, Colin D, Payan Y. Prévention de l’escarre chez le blessé médullaire à l’aide du capteur de pressions textile TexiSense. Ann Phys Rehabil Med 2011. [DOI: 10.1016/j.rehab.2011.07.309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Bettega G, Payan Y, Mollard B, Boyer A, Raphaël B, Lavallée S. A Simulator for Maxillofacial Surgery Integrating 3D Cephalometry and Orthodontia. ACTA ACUST UNITED AC 2010. [DOI: 10.3109/10929080009148886] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Vuillerme N, Chenu O, Pinsault N, Fleury A, Demongeot J, Payan Y. Can a plantar pressure–based tongue-placed electrotactile biofeedback improve postural control under altered vestibular and neck proprioceptive conditions? Neuroscience 2008; 155:291-6. [PMID: 18597943 DOI: 10.1016/j.neuroscience.2008.05.018] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2007] [Revised: 05/07/2008] [Accepted: 05/07/2008] [Indexed: 11/27/2022]
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Vuillerme N, Chenu O, Fleury A, Demongeot J, Payan Y. Optimizing the use of an artificial tongue-placed tactile biofeedback for improving ankle joint position sense in humans. Conf Proc IEEE Eng Med Biol Soc 2008; 2006:6029-32. [PMID: 17947176 DOI: 10.1109/iembs.2006.260826] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The performance of an artificial tongue-placed tactile biofeedback device for improving ankle joint position sense was assessed in 12 young healthy adults using an active matching task. The underlying principle of this system consisted of supplying individuals with supplementary information about the position of the matching ankle relative to the reference ankle position through a tongue-placed tactile output device generating electrotactile stimulation on a 36- point (6 x 6) matrix held against the surface of the tongue dorsum. Precisely, (1) no electrodes were activated when both ankles were in a similar angular position within predetermined "angular dead zone" (ADZ); (2) 12 electrodes (2 x 6) of the anterior and posterior zones of the matrix were activated (corresponding to the stimulation of the front and rear portion of the tongue) when the matching ankle was in too plantar and dorsiflexed position relative to the reference ankle, respectively. The effects of two ADZ values of 0.5 degrees and 1.5 degrees were evaluated. Results showed (1) more accurate and more consistent matching performances with than without biofeedback and (2) more accurate and more consistent ankle joint matching performances when using the biofeedback device with the smaller ADZ value. These findings suggest that (1) electrotactile stimulation of the tongue can be used to improve ankle joint proprioception and (2) this improvement can be increased through an appropriate specification of the ADZ parameter provided by the biofeedback system. Further investigations are needed to strengthen the potential clinical value of this device.
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Schiavone P, Boudou T, Promayon E, Perrier P, Payan Y. A light sterilizable pipette device for the in vivo estimation of human soft tissues constitutive laws. Annu Int Conf IEEE Eng Med Biol Soc 2008; 2008:4298-4301. [PMID: 19163663 DOI: 10.1109/iembs.2008.4650160] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
This paper introduces a new light device for the in vivo estimation of human soft tissues constitutive laws. It consists of an aspiration pipette able to meet the very severe sterilization and handling issues imposed during surgery. The simplicity of the device, free of any electronic circuitry, allows using it as an ancillary instrument. The deformation of the aspired tissue is imaged via a mirror using an external camera. The paper describes the experimental setup as well as the protocol that should be used during surgery. First feasibility measurements are shown for human tongue and forearm skin.
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Affiliation(s)
- P Schiavone
- TIMC-IMAG Laboratory, UMR UJF CNRS, 5525, Faculté de Médecine de Grenoble, Pavillon Taillefer, F38706 La Tronche Cédex, France
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Vuillerme N, Chenu O, Pinsault N, Moreau-Gaudry A, Fleury A, Demongeot J, Payan Y. Pressure sensor-based tongue-placed electrotactile biofeedback for balance improvement--biomedical application to prevent pressure sores formation and falls. ACTA ACUST UNITED AC 2007; 2007:6114-7. [PMID: 18003410 DOI: 10.1109/iembs.2007.4353744] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
We introduce the innovative technologies, based on the concept of "sensory substitution", we are developing in the fields of biomedical engineering and human disability. Precisely, our goal is to design, develop and validate practical assistive biomedical and/or technical devices and/or rehabilitating procedures for persons with disabilities, using artificial tongue-placed tactile biofeedback systems. Proposed applications are dealing with: (1) pressure sores prevention in case of spinal cord injuries (persons with paraplegia, or tetraplegia); and (2) balance control improvement to prevent fall in older and/or disabled adults. This paper describes the architecture and the functioning principle of these biofeedback systems and presents preliminary results of two feasibility studies performed on young healthy adults.
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Affiliation(s)
- N Vuillerme
- TIMC-IMAG Laboratory, UMR UJF CNRS 5525, Faculté de Médecine de Grenoble, Bâtiment Jean Roget, F38706 La Tronche, France.
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Bucki M, Lobos C, Payan Y. Framework for a Low-Cost Intra-Operative Image-Guided Neuronavigator Including Brain Shift Compensation. ACTA ACUST UNITED AC 2007; 2007:872-5. [DOI: 10.1109/iembs.2007.4352429] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Abstract
OBJECTIVES The aim of this paper is to introduce the principles of computer-assisted access to the kidney. The system provides the surgeon with a pre-operative 3D planning on computed tomography (CT) images. After a rigid registration with space-localized ultrasound (US) data, preoperative planning can be transferred to the intra-operative conditions and an intuitive man-machine interface allows the user to perform a puncture. MATERIAL AND METHODS Both CT and US images of informed normal volunteer were obtained to perform calculation on the accuracy of registration and punctures were carried out on a kidney phantom to measure the precision of the whole of the system. RESULTS We carried out millimetric registrations on real data and guidance experiments on a kidney phantom showed encouraging results of 4.7 mm between planned and reached targets. We noticed that the most significant error was related to the needle deflection during the puncture. CONCLUSION Preliminary results are encouraging. Further work will be undertaken to improve efficiency and accuracy, and to take breathing into account.
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Affiliation(s)
- P Mozer
- Department of Urology, Pitié-Salpetriere Hospital, Pierre et Marie Curie University (Paris VI) Paris, France
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Luboz V, Swider P, Ambard D, Boutault F, Payan Y. Intra-operative quantification of the surgical gesture in orbital surgery: application to the proptosis reduction. Clin Biomech (Bristol, Avon) 2007; 22:298-303. [PMID: 17141926 DOI: 10.1016/j.clinbiomech.2006.10.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2006] [Revised: 10/18/2006] [Accepted: 10/23/2006] [Indexed: 02/07/2023]
Abstract
BACKGROUND Proptosis is characterized by a protrusion of the eyeball due to an increase of the orbital tissue volume. To recover a normal eyeball positioning, the most frequent surgical technique consists in the osteotomy of orbital walls combined with a loading on the eyeball to initiate tissue decompression. The first biomechanical models dealing with proptosis reduction, validated in one patient, have been previously proposed by the authors. METHODS This paper proposed an experimental method to quantify the intra-operative clinical gesture in proptosis reduction, and the pilot study concerned one clinical case. The eyeball's backward displacement was measured by an optical 3D localizer and the load applied by the surgeon was simultaneously measured by a custom-made force gauge. Quasi-static stiffness of the intra-orbital content was evaluated. FINDINGS The average values for the whole experiment was 16 N (SD: 3N) for the force exerted by the surgeon and 9 mm (SD: 4mm) for the eyeball backward displacement. The averaged quasi-static stiffness of the orbital content was evaluated to 2.4N/mm (SD: 1.2) and showed a global decrease of 45% post-operatively. INTERPRETATION The protocol and the associated custom-designed devices allowed loads, induced displacements and macroscopic stiffness of the orbital content to be measured intra-operatively. The clinical relevance has been demonstrated in a pilot study. To our knowledge, no study has been published allowing the clinical gesture in proptosis reduction to be quantified intra-operatively. Associating an enlarged database and validated patient-related predictive models will reinforce the surgical efficiency and patient comfort contributing to diagnosis and intra-operative guidance.
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Affiliation(s)
- V Luboz
- TIMC-IMAG Laboratory, UMR CNRS 5525, Faculté de Médecine, 38706 La Tronche, France
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Vuillerme N, Chenu O, Pinsault N, Fleury A, Demongeot J, Payan Y. A plantar-pressure based tongue-placed tactile biofeedback system for balance improvement. Comput Methods Biomech Biomed Engin 2007. [DOI: 10.1080/10255840701480113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Bucki M, Lobos C, Payan Y. Bio-mechanical model of the brain for a per-operative image-guided neuronavigator compensating for “brain-shift” deformations. Comput Methods Biomech Biomed Engin 2007. [DOI: 10.1080/10255840701479057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Schiavone P, Boudou T, Ohayon J, Payan Y. In vivomeasurement of the human soft tissues constitutive laws. Applications to computer aided surgery. Comput Methods Biomech Biomed Engin 2007. [DOI: 10.1080/10255840701479982] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Chouly F, Van Hirtum A, Lagrée P, Pelorson X, Payan Y. Fluid-structure interaction in obstructive sleep apnea: Validation of numerical simulations using in-vitro measurements. J Biomech 2006. [DOI: 10.1016/s0021-9290(06)84802-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Gerard JM, Ohayon J, Luboz V, Perrier P, Payan Y. Non-linear elastic properties of the lingual and facial tissues assessed by indentation technique. Application to the biomechanics of speech production. Med Eng Phys 2005; 27:884-92. [PMID: 16280251 DOI: 10.1016/j.medengphy.2005.08.001] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2004] [Revised: 08/09/2005] [Accepted: 08/30/2005] [Indexed: 11/24/2022]
Abstract
This paper aims at characterizing the mechanical behavior of two human anatomical structures, namely the tongue and the cheek. For this, an indentation experiment was provided, by measuring the mechanical response of tongue and cheek tissues removed from the fresh cadaver of a 74 year old woman. Non-linear relationships were observed between the force applied to the tissues and the corresponding displacements. To infer the mechanical constitutive laws from these measurements, a finite element (FE) analysis was provided. This analysis aimed at simulating the indentation experiment. An optimization process was used to determine the FE constitutive laws that provided the non-linear force/displacements observed during the indentation experiments. The tongue constitutive law was used for simulations provided by a 3D FE biomechanical model of the human tongue. This dynamical model was designed to study speech production. Given a set of tongue muscular commands, which levels correspond to the force classically measured during speech production, the FE model successfully simulated the main tongue movements observed during speech data.
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Affiliation(s)
- J M Gerard
- Laboratoire TIMC/IMAG, Faculte de Medecine de Grenoble, Institut d'Ingenierie de l'Information de Sante, Pavillon Taillefer, UMR CNRS 5525, Université Joseph Fourier de Grenoble, 38706 La Tronche, France
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Chabanas M, Marécaux C, Chouly F, Boutault F, Payan Y. Evaluating soft tissue simulation in maxillofacial surgery using preoperative and postoperative CT scans. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.ics.2004.03.165] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Bettega G, Payan Y, Mollard B, Boyer A, Raphaël B, Lavallée S. A simulator for maxillofacial surgery integrating 3D cephalometry and orthodontia. Comput Aided Surg 2001; 5:156-65. [PMID: 10964087 DOI: 10.1002/1097-0150(2000)5:3<156::aid-igs3>3.0.co;2-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVES This paper presents a new simulator for maxillofacial surgery that gathers the dental and maxillofacial analyses together into a single computer-assisted procedure. The idea is to first propose a repositioning of the maxilla via the introduction of 3D cephalometry applied to a 3D virtual model of the patient's skull. Orthodontic data are then integrated into this model, using optical measurements of plaster casts of the teeth. MATERIALS AND METHODS The feasibility of the maxillofacial demonstrator was first evaluated on a dry skull. To simulate malformations (and thus simulate a "real" patient), the skull was modified and manually cut by the surgeon to generate a given maxillofacial malformation (with asymmetries in the sagittal, frontal, and axial planes). RESULTS The validation of our simulator consisted of evaluating its ability to propose a bone repositioning diagnosis that would restore the skull to its original configuration. An initial qualitative validation is provided in this paper, with a 1.5-mm error in the repositioning diagnosis. CONCLUSIONS These results mainly validate the concept of a maxillofacial numerical simulator that integrates 3D cephalometry and guarantees a correct dental occlusion.
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Affiliation(s)
- G Bettega
- Service de Chirurgie Plastique et Maxillo-Faciale, Centre Hospitalier Universitaire de Grenoble, Laboratoire TIMC/IMAG, Université Joseph Fourier de Grenoble, and PRAXIM, La Tronche, France
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Abstract
Several authors have employed finite element analysis for stress and strain analysis in orthopaedic biomechanics. Unfortunately, the definition of three-dimensional models is time consuming (mainly because of the manual 3D meshing process) and consequently the number of analyses to be performed is limited. The authors have investigated a new patient-specific method allowing automatically 3D mesh generation for structures as complex as bone for example. This method, called the mesh-matching (M-M) algorithm, generated automatically customized 3D meshes of anatomical structures from an already existing model. The M-M algorithm has been used to generate FE models of 10 proximal human femora from an initial one which had been experimentally validated. The automatically generated meshes seemed to demonstrate satisfying results.
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Affiliation(s)
- B Couteau
- INSERM U518, Pathologies ostéoarticulaires, C.H.U. Purpan, BP 3103, 31026 3, Toulouse cedex, France.
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