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Sharma N, Prakash A, Sharma S. An optoelectronic muscle contraction sensor for prosthetic hand application. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2023; 94:035009. [PMID: 37012764 DOI: 10.1063/5.0130394] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 03/05/2023] [Indexed: 06/19/2023]
Abstract
Surface electromyography (sEMG) is considered an established means for controlling prosthetic devices. sEMG suffers from serious issues such as electrical noise, motion artifact, complex acquisition circuitry, and high measuring costs because of which other techniques have gained attention. This work presents a new optoelectronic muscle (OM) sensor setup as an alternative to the EMG sensor for precise measurement of muscle activity. The sensor integrates a near-infrared light-emitting diode and phototransistor pair along with the suitable driver circuitry. The sensor measures skin surface displacement (that occurs during muscle contraction) by detecting backscattered infrared light from skeletal muscle tissue. With an appropriate signal processing scheme, the sensor was able to produce a 0-5 V output proportional to the muscular contraction. The developed sensor depicted decent static and dynamic features. In detecting muscle contractions from the forearm muscles of subjects, the sensor showed good similarity with the EMG sensor. In addition, the sensor displayed higher signal-to-noise ratio values and better signal stability than the EMG sensor. Furthermore, the OM sensor setup was utilized to control the rotation of the servomotor using an appropriate control scheme. Hence, the developed sensing system can measure muscle contraction information for controlling assistive devices.
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Affiliation(s)
- Neeraj Sharma
- School of Biomedical Engineering, Indian Institute of Technology (BHU), Varanasi 221005, India
| | - Alok Prakash
- CSIR-National Physical Laboratory, New Delhi 110012, India
| | - Shiru Sharma
- School of Biomedical Engineering, Indian Institute of Technology (BHU), Varanasi 221005, India
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2
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Reyes DRA, Barbosa AMP, Juliana FF, Sofia QBCV, Costa SMB, Hallur RLS, Enriquez EMA, Oliveira RG, de Souza Rossignolli P, Pedroni CR, Alves FCB, Garcia GA, Abbade JF, Carvalho CNF, Sobrevia L, Rudge MVC, Calderon IIMP. Viability of ex-vivo myography as a diagnostic tool for rectus abdominis muscle electrical activity collected at Cesarean section within a diamater cohort study. Biomed Eng Online 2022; 21:76. [PMID: 36242084 PMCID: PMC9563120 DOI: 10.1186/s12938-022-01042-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 09/20/2022] [Indexed: 11/11/2022] Open
Abstract
Background Ex-vivo myography enables the assessment of muscle electrical activity response. This study explored the viability of determining the physiological responses in muscles without tendon, as rectus abdominis muscle (RAM), through ex-vivo myography to assess its potential as a diagnostic tool. Results All tested RAM samples (five different samples) show patterns of electrical activity. A positive response was observed in 100% of the programmed stimulation. RAM 3 showed greater weight (0.47 g), length (1.66 cm), and width (0.77 cm) compared to RAM 1, RAM 2, RAM 4 and RAM 5 with more sustained electrical activity over time, a higher percentage of fatigue was analyzed at half the time of the electrical activity. The order of electrical activity (Mn) was RAM 3 > RAM 5 > RAM 1 > RAM 4 > RAM 2. No electrical activity was recorded in the Sham group. Conclusions This study shows that it is feasible to assess the physiological responses of striated muscle without tendon as RAM, obtained at C-section, under ex vivo myography. These results could be recorded, properly analyzed, and demonstrated its potential as a diagnostic tool for rectus abdominis muscle electrical activity.
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Affiliation(s)
- David R A Reyes
- Department of Gynecology and Obstetrics, Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu, São Paulo, CEP18618-687, Brazil
| | - Angelica M P Barbosa
- Department of Gynecology and Obstetrics, Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu, São Paulo, CEP18618-687, Brazil.,Department of Physiotherapy and Occupational Therapy, School of Philosophy and Sciences, São Paulo State University (UNESP), Marilia, Brazil
| | - Floriano F Juliana
- Department of Gynecology and Obstetrics, Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu, São Paulo, CEP18618-687, Brazil
| | - Quiroz B C V Sofia
- Department of Gynecology and Obstetrics, Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu, São Paulo, CEP18618-687, Brazil
| | - Sarah M B Costa
- Department of Gynecology and Obstetrics, Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu, São Paulo, CEP18618-687, Brazil
| | - Raghavendra L S Hallur
- Department of Gynecology and Obstetrics, Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu, São Paulo, CEP18618-687, Brazil.,Centre for Biotechnology, Pravara Institute of Medical Sciences (Deemed to Be University), Loni-413736, Rahata Taluk, Ahmednagar District, Ahmednagar, Maharashtra, India
| | - Eusebio M A Enriquez
- Department of Gynecology and Obstetrics, Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu, São Paulo, CEP18618-687, Brazil
| | - Rafael G Oliveira
- Department of Gynecology and Obstetrics, Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu, São Paulo, CEP18618-687, Brazil
| | - Patricia de Souza Rossignolli
- Department of Physiotherapy and Occupational Therapy, School of Philosophy and Sciences, São Paulo State University (UNESP), Marilia, Brazil
| | - Cristiane Rodrigues Pedroni
- Department of Physiotherapy and Occupational Therapy, School of Philosophy and Sciences, São Paulo State University (UNESP), Marilia, Brazil
| | - Fernanda C B Alves
- Department of Gynecology and Obstetrics, Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu, São Paulo, CEP18618-687, Brazil
| | - Gabriela A Garcia
- Department of Gynecology and Obstetrics, Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu, São Paulo, CEP18618-687, Brazil
| | - Joelcio F Abbade
- Department of Gynecology and Obstetrics, Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu, São Paulo, CEP18618-687, Brazil
| | - Carolina N F Carvalho
- Department of Gynecology and Obstetrics, Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu, São Paulo, CEP18618-687, Brazil
| | - Luis Sobrevia
- Department of Gynecology and Obstetrics, Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu, São Paulo, CEP18618-687, Brazil.,Cellular and Molecular Physiology Laboratory (CMPL), Department of Obstetrics, Division of Obstetrics and Gynaecology, School of Medicine, Faculty of Medicine, Pontificia Universidad Católica de Chile, 8330024, Santiago, Chile.,Department of Physiology, Faculty of Pharmacy, Universidad de Sevilla, 41012, Seville, Spain.,University of Queensland Centre for Clinical Research (UQCCR), Faculty of Medicine and Biomedical Sciences, University of Queensland, Herston, QLD, 4029, Australia.,Department of Pathology and Medical Biology, Division of Pathology, University of Groningen, University Medical Center Groningen (UMCG), Groningen, The Netherlands
| | - Marilza V C Rudge
- Department of Gynecology and Obstetrics, Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu, São Paulo, CEP18618-687, Brazil.
| | - Iracema I M P Calderon
- Department of Gynecology and Obstetrics, Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu, São Paulo, CEP18618-687, Brazil
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Jarrah HR, Zolfagharian A, Bodaghi M. Finite element modeling of shape memory polyurethane foams for treatment of cerebral aneurysms. Biomech Model Mechanobiol 2022; 21:383-399. [PMID: 34907490 PMCID: PMC8807438 DOI: 10.1007/s10237-021-01540-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 11/24/2021] [Indexed: 11/25/2022]
Abstract
In this paper, a thermo-mechanical analysis of shape memory polyurethane foams (SMPUFs) with aiding of a finite element model (FEM) for treating cerebral aneurysms (CAs) is introduced. Since the deformation of foam cells is extremely difficult to observe experimentally due to their small size, a structural cell-assembly model is established in this work via finite element modeling to examine all-level deformation details. Representative volume elements of random equilateral Kelvin open-cell microstructures are adopted for the cell foam. Also, a user-defined material subroutine (UMAT) is developed based on a thermo-visco-elastic constitutive model for SMPUFs, and implemented in the ABAQUS software package. The model is able to capture thermo-mechanical responses of SMPUFs for a full shape memory thermodynamic cycle. One of the latest treatments of CAs is filling the inside of aneurysms with SMPUFs. The developed FEM is conducted on patient-specific basilar aneurysms treated by SMPUFs. Three sizes of foams are selected for the filling inside of the aneurysm and then governing boundary conditions and loadings are applied to the foams. The results of the distribution of stress and displacement in the absence and presence of the foam are compared. Due to the absence of similar results in the specialized literature, this paper is likely to fill a gap in the state of the art of this problem and provide pertinent results that are instrumental in the design of SMPUFs for treating CAs.
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Affiliation(s)
- H R Jarrah
- Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham, NG11 8NS, UK
| | - A Zolfagharian
- School of Engineering, Deakin University, Geelong, 3216, Australia
| | - M Bodaghi
- Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham, NG11 8NS, UK.
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Dabiri Y, Sack K, Rebelo N, Wang P, Wang Y, Choy J, Kassab GS, Guccione J. Method for Calibration of Left Ventricle Material Properties using 3D Echocardiography Endocardial Strains. J Biomech Eng 2019; 141:2738327. [PMID: 31294752 DOI: 10.1115/1.4044215] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Indexed: 12/14/2022]
Abstract
We sought to calibrate mechanical properties of left ventricle (LV) based on 3D speckle tracking echocardiographic imaging data recorded from 16 segments defined by American Heart Association (AHA). The in vivo data were used to create finite element (FE) LV and biventricular (BV) models. The orientation of the fibers in the LV model was rule-based, but diffusion tensor magnetic resonance imaging (DT-MRI) data were used for the fiber directions in the BV model. A nonlinear fiber-reinforced constitutive equation was used to describe the passive behavior of the myocardium, whereas the active tension was described by a model based on tissue contraction (Tmax). Isight was used for optimization, which used Abaqus as the forward solver (Simulia, Providence, USA). The calibration of passive properties based on the end diastolic pressure volume relation (ED PVR) curve resulted in relatively good agreement (mean error = -0.04 ml). The difference between experimental and computational strains decreased after segmental strain metrics, rather than global metrics, were used for calibration: for the LV model, the mean difference reduced from 0.129 to 0.046 (circumferential) and from 0.076 to 0.059 (longitudinal); for the BV model, the mean difference nearly did not change in the circumferential direction (0.061) but reduced in the longitudinal direction from 0.076 to 0.055. The calibration of mechanical properties for myocardium can be improved using segmental strain metrics. The importance of realistic fiber orientation and geometry for modeling of the LV was shown.
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Affiliation(s)
- Yaghoub Dabiri
- Department of Surgery, University of California San Francisco, San Francisco, California, USA; University of California San Francisco, San Francisco, California; California Medical Innovations Institute, San Diego, California, USA; Full Mailing Address: 11107 Roselle Street Suite 211, San Diego, CA 92121
| | - Kevin Sack
- Department of Surgery, University of California San Francisco, San Francisco, California, USA; Division of Biomedical Engineering, Department of Human Biology, University of Cape Town, Cape Town, South Africa; Full Mailing Address: Rm 7.26 Anatomy Building, University of Cape Town Medical Campus, Anzio Rd, Cape Town, 7925, South Africa
| | - Nuno Rebelo
- Member of ASME Nuno Rebelo Associates LLC, Fremont, California, USA; Full Mailing Address: 46709 Rancho Higuera Rd, Fremont, CA 94539, USA
| | - Peter Wang
- Dassault Systemes Simulia Corp, 1301 Atwood Avenue, Suite 101W, Johnston, RI 02919, USA; Full Mailing Address: 3979 Freedom Circle, Suite 750, Santa Clara, CA 95054
| | - Yunjie Wang
- Thornton Tomasetti, Cupertino, California, USA; Full Mailing Address: 19200 Stevens Creek Blvd, Suite 100, Cupertino, CA 95014
| | - Jenny Choy
- California Medical Innovations Institute, San Diego, California, USA; Full Mailing Address: 11107 Roselle Street Suite 201, San Diego, CA 92121
| | - Ghassan S Kassab
- California Medical Innovations Institute, San Diego, California, USA; Full Mailing Address: 11107 Roselle Street Suite 211, San Diego, CA 92121
| | - Julius Guccione
- Department of Surgery, University of California San Francisco, San Francisco, California, USA; Full Mailing Address: 4150 Clement St , San Francisco, CA 94121
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Rahe-Meyer N, Pawlak M, Weilbach C, Osthaus WA, Ruhschulte H, Solomon C, Piepenbrock S, Winterhalter M. Complex myograph allows the examination of complex muscle contractions for the assessment of muscle force, shortening, velocity, and work in vivo. Biomed Eng Online 2008; 7:20. [PMID: 18616815 PMCID: PMC2492863 DOI: 10.1186/1475-925x-7-20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2007] [Accepted: 07/10/2008] [Indexed: 11/13/2022] Open
Abstract
Background The devices used for in vivo examination of muscle contractions assess only pure force contractions and the so-called isokinetic contractions. In isokinetic experiments, the extremity and its muscle are artificially moved with constant velocity by the measuring device, while a tetanic contraction is induced in the muscle, either by electrical stimulation or by maximal voluntary activation. With these systems, experiments cannot be performed at pre-defined, constant muscle length, single contractions cannot be evaluated individually and the separate examination of the isometric and the isotonic components of single contractions is not possible. Methods The myograph presented in our study has two newly developed technical units, i.e. a). a counterforce unit which can load the muscle with an adjustable, but constant force and b). a length-adjusting unit which allows for both the stretching and the contraction length to be infinitely adjustable independently of one another. The two units support the examination of complex types of contraction and store the counterforce and length-adjusting settings, so that these conditions may be accurately reapplied in later sessions. Results The measurement examples presented show that the muscle can be brought to every possible pre-stretching length and that single isotonic or complex isometric-isotonic contractions may be performed at every length. The applied forces act during different phases of contraction, resulting into different pre- and after-loads that can be kept constant – uninfluenced by the contraction. Maximal values for force, shortening, velocity and work may be obtained for individual muscles. This offers the possibility to obtain information on the muscle status and to monitor its changes under non-invasive measurement conditions. Conclusion With the Complex Myograph, the whole spectrum of a muscle's mechanical characteristics may be assessed.
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Affiliation(s)
- Niels Rahe-Meyer
- Department of Anaesthesiology, Hannover Medical School, Carl-Neuberg-Str, 1, D-30625, Hannover, Germany.
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Rahe-Meyer N, Winterhalter M, Ahmed AI, Weilbach C, Gross M, Piepenbrock S, Pawlak M. Assessment of precision and reproducibility of a new myograph. Biomed Eng Online 2007; 6:49. [PMID: 18096046 PMCID: PMC2244633 DOI: 10.1186/1475-925x-6-49] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2007] [Accepted: 12/20/2007] [Indexed: 11/11/2022] Open
Abstract
Background The physiological characteristics of muscle activity and the assessment of muscle strength represent important diagnostic information. There are many devices that measure muscle force in humans, but some require voluntary contractions, which are difficult to assess in weak or unconscious patients who are unable to complete a full range of voluntary force assessment tasks. Other devices, which obtain standard muscle contractions by electric stimulations, do not have the technology required to induce and measure reproducible valid contractions at the optimum muscle length. Methods In our study we used a newly developed diagnostic device which measures accurately the reproducibility and time-changed-variability of the muscle force in an individual muscle. A total of 500 in-vivo measurements of supra-maximal isometric single twitch contractions were carried out on the musculus adductor pollicis of 5 test subjects over 10 sessions, with ten repetitions per session. The same protocol was performed on 405 test subjects with two repetitions each to determine a reference-interval on healthy subjects. Results Using our test setting, we found a high reproducibility of the muscle contractions of each test subject. The precision of the measurements performed with our device was 98.74%. Only two consecutive measurements are needed in order to assess a real, representative individual value of muscle force. The mean value of the force of contraction was 9.51 N and the 95% reference interval was 4.77–14.25 N. Conclusion The new myograph is a highly reliable measuring device with which the adductor pollicis can be investigated at the optimum length. It has the potential to become a reliable and valid tool for diagnostic in the clinical setting and for monitoring neuromuscular diseases.
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Affiliation(s)
- Niels Rahe-Meyer
- Department of Anesthesiology, Hannover Medical School, Carl-Neuberg-Str, 1, D-30625 Hannover, Germany.
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