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Bougandoura O, Achour Y, Zaoui A, Starzyński J. Characterizing parameters and incorporating action potentials via the Hodgkin-Huxley model in a novel electric model for living cells. Electromagn Biol Med 2024; 43:187-203. [PMID: 38990565 DOI: 10.1080/15368378.2024.2372107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Accepted: 06/19/2024] [Indexed: 07/12/2024]
Abstract
To enhance our understanding of electroporation and optimize the pulses used within the frequency range of 1 kHz to 100 MHz, with the aim of minimizing side effects such as muscle contraction, we introduce a novel electrical model, structured as a 2D representation employing exclusively lumped elements. This model adeptly encapsulates the intricate dynamics of living cells' impedance variation. A distinguishing attribute of the proposed model lies in its capacity to decipher the distribution of transmembrane potential across various orientations within living cells. This aspect bears critical importance, particularly in contexts such as electroporation and cellular stimulation, where precise knowledge of potential gradients is pivotal. Furthermore, the augmentation of the proposed electrical model with the Hodgkin-Huxley (HH) model introduces an additional dimension. This integration augments the model's capabilities, specifically enabling the exploration of muscle cell stimulation and the generation of action potentials. This broader scope enhances the model's utility, facilitating comprehensive investigations into intricate cellular behaviors under the influence of external electric fields.
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Affiliation(s)
| | - Yahia Achour
- UER-ELT, Ecole Militaire Polytechnique, Algiers, Algeria
| | - Abdelhalim Zaoui
- Department of Electrical Engineering and Industrial Computing, Ecole Nationale Supérieur de Technologie, Algiers, Algeria
| | - Jacek Starzyński
- Faculty of Electrical Engineering, Warsaw University of Technology, Warszawa, Poland
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2
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Zieliński G, Gawda P. Surface Electromyography in Dentistry-Past, Present and Future. J Clin Med 2024; 13:1328. [PMID: 38592144 PMCID: PMC10931581 DOI: 10.3390/jcm13051328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2024] [Revised: 02/21/2024] [Accepted: 02/22/2024] [Indexed: 04/10/2024] Open
Abstract
Surface electromyography (sEMG) is a technique for measuring and analyzing the electrical signals of muscle activity using electrodes placed on the skin's surface. The aim of this paper was to outline the history of the development and use of surface electromyography in dentistry, to show where research and technical solutions relating to surface electromyography currently lie, and to make recommendations for further research. sEMG is a diagnostic technique that has found significant application in dentistry. The historical section discusses the evolution of sEMG methods and equipment, highlighting how technological advances have influenced the accuracy and applicability of this method in dentistry. The need for standardization of musculoskeletal testing methodology is highlighted and the needed increased technical capabilities of sEMG equipment and the ability to specify parameters (e.g., sampling rates, bandwidth). A higher sampling rate (the recommended may be 2000 Hz or higher in masticatory muscles) allows more accurate recording of changes in the signal, which is essential for accurate analysis of muscle function. Bandwidth is one of the key parameters in sEMG research. Bandwidth determines the range of frequencies effectively recorded by the sEMG system (the recommended frequency limits are usually between 20 Hz and 500 Hz in masticatory muscles). In addition, the increased technical capabilities of sEMG equipment and the ability to specify electromyographic parameters demonstrate the need for a detailed description of selected parameters in the methodological section. This is necessary to maintain the reproducibility of sEMG testing. More high-quality clinical trials are needed in the future.
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Affiliation(s)
- Grzegorz Zieliński
- Department of Sports Medicine, Medical University of Lublin, 20-093 Lublin, Poland
| | - Piotr Gawda
- Department of Sports Medicine, Medical University of Lublin, 20-093 Lublin, Poland
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3
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Sagot M, Bou E, Bourrier D, Cerf A, Aubert H, Vieu C. Bio-Impedance Spectroscopy of Retained Cells Using a Micro-Perforated Sensing Membrane Filtrating Whole Blood Samples under High Flowrate. BIOSENSORS 2023; 13:996. [PMID: 38131756 PMCID: PMC10741909 DOI: 10.3390/bios13120996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 11/09/2023] [Accepted: 11/17/2023] [Indexed: 12/23/2023]
Abstract
Blood filtration using micro-fabricated devices is an interdisciplinary topic of research and innovation driven by clinical applications in cytapheresis, cardiovascular disease monitoring, or liquid biopsy. In this paper, we demonstrate that a micro-perforated membrane can be equipped with sensing microelectrodes for detecting, in situ and in real-time, the capture of cellular material during ex vivo filtration of whole blood under high flow rates. This work describes the fabrication process of the sift and detection microdevice. We demonstrate that reliable electrical signals can be measured in whole blood samples flowing inside a fluidic system at typical flow rates, as large as 11.5 mL/min, hence allowing for large-volume sample processing. The in situ monitoring of the electrical impedance of the microelectrodes is shown to characterize the accumulation of living circulating cells retained by the filtrating membrane, opening interesting applications for monitoring blood filtration processes.
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Affiliation(s)
- Matthieu Sagot
- LAAS-CNRS, Université de Toulouse, CNRS, INSA, INPT, 31400 Toulouse, France
- SmartCatch, 1 Place Pierre Potier, 31100 Toulouse, France
| | - Elise Bou
- SmartCatch, 1 Place Pierre Potier, 31100 Toulouse, France
| | - David Bourrier
- LAAS-CNRS, Université de Toulouse, CNRS, INSA, INPT, 31400 Toulouse, France
| | - Aline Cerf
- SmartCatch, 1 Place Pierre Potier, 31100 Toulouse, France
| | - Hervé Aubert
- LAAS-CNRS, Université de Toulouse, CNRS, INSA, INPT, 31400 Toulouse, France
| | - Christophe Vieu
- LAAS-CNRS, Université de Toulouse, CNRS, INSA, INPT, 31400 Toulouse, France
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4
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Lu J, Huang Z, Zhuang B, Cheng Z, Guo J, Lou H. Development and evaluation of a robotic system for lumbar puncture and epidural steroid injection. Front Neurorobot 2023; 17:1253761. [PMID: 37881516 PMCID: PMC10595035 DOI: 10.3389/fnbot.2023.1253761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 08/11/2023] [Indexed: 10/27/2023] Open
Abstract
Introduction Lumbar puncture is an important medical procedure for various diagnostics and therapies, but it can be hazardous due to individual variances in subcutaneous soft tissue, especially in the elderly and obese. Our research describes a novel robot-assisted puncture system that automatically controls and maintains the probe at the target tissue layer through a process of tissue recognition. Methods The system comprises a robotic system and a master computer. The robotic system is constructed based on a probe consisting of a pair of concentric electrodes. From the probe, impedance spectroscopy measures bio-impedance signals and transforms them into spectra that are communicated to the master computer. The master computer uses a Bayesian neural network to classify the bio-impedance spectra as corresponding to different soft tissues. By feeding the bio-impedance spectra of unknown tissues into the Bayesian neural network, we can determine their categories. Based on the recognition results, the master computer controls the motion of the robotic system. Results The proposed system is demonstrated on a realistic phantom made of ex vivo tissues to simulate the spinal environment. The findings indicate that the technology has the potential to increase the precision and security of lumbar punctures and associated procedures. Discussion In addition to lumbar puncture, the robotic system is suitable for related puncture operations such as discography, radiofrequency ablation, facet joint injection, and epidural steroid injection, as long as the required tissue recognition features are available. These operations can only be carried out once the puncture needle and additional instruments reach the target tissue layer, despite their ensuing processes being distinct.
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Affiliation(s)
- Jiaxin Lu
- School of Automation, Guangdong University of Technology, Guangzhou, China
| | - Zekai Huang
- School of Automation, Guangdong University of Technology, Guangzhou, China
| | - Baiyang Zhuang
- School of Automation, Guangdong University of Technology, Guangzhou, China
| | - Zhuoqi Cheng
- The Maersk Mc-Kinney Moller Institute, University of Southern Denmark, Odense, Denmark
| | - Jing Guo
- School of Automation, Guangdong University of Technology, Guangzhou, China
| | - Haifang Lou
- The First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, China
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5
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Abasi S, Aggas JR, Garayar-Leyva GG, Walther BK, Guiseppi-Elie A. Bioelectrical Impedance Spectroscopy for Monitoring Mammalian Cells and Tissues under Different Frequency Domains: A Review. ACS MEASUREMENT SCIENCE AU 2022; 2:495-516. [PMID: 36785772 PMCID: PMC9886004 DOI: 10.1021/acsmeasuresciau.2c00033] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Revised: 08/05/2022] [Accepted: 08/05/2022] [Indexed: 05/13/2023]
Abstract
Bioelectrical impedance analysis and bioelectrical impedance spectroscopy (BIA/BIS) of tissues reveal important information on molecular composition and physical structure that is useful in diagnostics and prognostics. The heterogeneity in structural elements of cells, tissues, organs, and the whole human body, the variability in molecular composition arising from the dynamics of biochemical reactions, and the contributions of inherently electroresponsive components, such as ions, proteins, and polarized membranes, have rendered bioimpedance challenging to interpret but also a powerful evaluation and monitoring technique in biomedicine. BIA/BIS has thus become the basis for a wide range of diagnostic and monitoring systems such as plethysmography and tomography. The use of BIA/BIS arises from (i) being a noninvasive and safe measurement modality, (ii) its ease of miniaturization, and (iii) multiple technological formats for its biomedical implementation. Considering the dependency of the absolute and relative values of impedance on frequency, and the uniqueness of the origins of the α-, β-, δ-, and γ-dispersions, this targeted review discusses biological events and underlying principles that are employed to analyze the impedance data based on the frequency range. The emergence of BIA/BIS in wearable devices and its relevance to the Internet of Medical Things (IoMT) are introduced and discussed.
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Affiliation(s)
- Sara Abasi
- Center
for Bioelectronics, Biosensors and Biochips (C3B®), Department
of Biomedical Engineering, Texas A&M
University, 400 Bizzell Street, College Station, Texas 77843, United States
- Cell
Culture Media Services, Cytiva, 100 Results Way, Marlborough, Massachusetts 01752, United States
| | - John R. Aggas
- Center
for Bioelectronics, Biosensors and Biochips (C3B®), Department
of Biomedical Engineering, Texas A&M
University, 400 Bizzell Street, College Station, Texas 77843, United States
- Test
Development, Roche Diagnostics, 9115 Hague Road, Indianapolis, Indiana 46256, United
States
| | - Guillermo G. Garayar-Leyva
- Center
for Bioelectronics, Biosensors and Biochips (C3B®), Department
of Biomedical Engineering, Texas A&M
University, 400 Bizzell Street, College Station, Texas 77843, United States
- Department
of Electrical and Computer Engineering, Texas A&M University, 400 Bizzell Street, College Station, Texas 77843, United States
| | - Brandon K. Walther
- Center
for Bioelectronics, Biosensors and Biochips (C3B®), Department
of Biomedical Engineering, Texas A&M
University, 400 Bizzell Street, College Station, Texas 77843, United States
- Department
of Cardiovascular Sciences, Houston Methodist
Institute for Academic Medicine and Houston Methodist Research Institute, 6670 Bertner Avenue, Houston, Texas 77030, United States
| | - Anthony Guiseppi-Elie
- Center
for Bioelectronics, Biosensors and Biochips (C3B®), Department
of Biomedical Engineering, Texas A&M
University, 400 Bizzell Street, College Station, Texas 77843, United States
- Department
of Electrical and Computer Engineering, Texas A&M University, 400 Bizzell Street, College Station, Texas 77843, United States
- Department
of Cardiovascular Sciences, Houston Methodist
Institute for Academic Medicine and Houston Methodist Research Institute, 6670 Bertner Avenue, Houston, Texas 77030, United States
- ABTECH Scientific,
Inc., Biotechnology Research Park, 800 East Leigh Street, Richmond, Virginia 23219, United
States
- . Tel.: +1(804)347.9363.
Fax: +1(804)347.9363
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Ojarand J, Priidel E, Min M. Derivation of Bioimpedance Model Data Utilizing a Compact Analyzer and Two Capacitive Electrodes: A Forearm Example. IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS 2022; 16:891-901. [PMID: 36103451 DOI: 10.1109/tbcas.2022.3206666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The paper investigates the impacts of the selected electrical equivalent circuit model, measurement setup, and surrounding environment on the trustworthiness of electrical bioimpedance measurement and obtained model data in the human body. The influence of these constitutive components of the system on finding the model parameters is analyzed and illustrated with examples. The results based on experimental measurements on a forearm near the wrist are provided by employing the model, measurement setup, and novel 16-bit compact wireless impedance analyzer (CIA) according to the outcome of the analysis. The area near the wrist is of interest because of attempts to get cardiac-activity-related impedance changes. It is concluded that a two-electrode system with voltage excitation suits better for determining bioimpedance model parameters in the β dispersion area. The results obtained with the CIA and two capacitive bracelet electrodes on a left forearm were used for the fitting model parameters. Despite the small dimensions of 60 × 60 × 25 mm of the CIA reducing stray capacitance to 8 pF, it provides relative impedance magnitude measurement error below 0.3% and phase error below 0.2 ° in the 10 MHz range. Analysis of the model parameters allowed separation of the electrodes, skin, and internal tissue spectra and revealed the relative significance of model components at different frequencies.
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Bounik R, Cardes F, Ulusan H, Modena MM, Hierlemann A. Impedance Imaging of Cells and Tissues: Design and Applications. BME FRONTIERS 2022; 2022:1-21. [PMID: 35761901 PMCID: PMC7612906 DOI: 10.34133/2022/9857485] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Accepted: 03/28/2022] [Indexed: 11/09/2022] Open
Abstract
Due to their label-free and noninvasive nature, impedance measurements have attracted increasing interest in biological research. Advances in microfabrication and integrated-circuit technology have opened a route to using large-scale microelectrode arrays for real-time, high-spatiotemporal-resolution impedance measurements of biological samples. In this review, we discuss different methods and applications of measuring impedance for cell and tissue analysis with a focus on impedance imaging with microelectrode arrays in in vitro applications. We first introduce how electrode configurations and the frequency range of the impedance analysis determine the information that can be extracted. We then delve into relevant circuit topologies that can be used to implement impedance measurements and their characteristic features, such as resolution and data-acquisition time. Afterwards, we detail design considerations for the implementation of new impedance-imaging devices. We conclude by discussing future fields of application of impedance imaging in biomedical research, in particular applications where optical imaging is not possible, such as monitoring of ex vivo tissue slices or microelectrode-based brain implants.
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Affiliation(s)
- Raziyeh Bounik
- ETH Zürich, Department of Biosystems Science and Engineering, Basel, Switzerland
| | - Fernando Cardes
- ETH Zürich, Department of Biosystems Science and Engineering, Basel, Switzerland
| | - Hasan Ulusan
- ETH Zürich, Department of Biosystems Science and Engineering, Basel, Switzerland
| | - Mario M. Modena
- ETH Zürich, Department of Biosystems Science and Engineering, Basel, Switzerland
| | - Andreas Hierlemann
- ETH Zürich, Department of Biosystems Science and Engineering, Basel, Switzerland
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Ahamed MK, Ahmed M, Karal MAS. Quantification of pulsed electric field for the rupture of giant vesicles with various surface charges, cholesterols and osmotic pressures. PLoS One 2022; 17:e0262555. [PMID: 35025973 PMCID: PMC8757908 DOI: 10.1371/journal.pone.0262555] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 12/28/2021] [Indexed: 12/02/2022] Open
Abstract
Electropermeabilization is a promising phenomenon that occurs when pulsed electric field with high frequency is applied to cells/vesicles. We quantify the required values of pulsed electric fields for the rupture of cell-sized giant unilamellar vesicles (GUVs) which are prepared under various surface charges, cholesterol contents and osmotic pressures. The probability of rupture and the average time of rupture are evaluated under these conditions. The electric field changes from 500 to 410 Vcm-1 by varying the anionic lipid mole fraction from 0 to 0.60 for getting the maximum probability of rupture (i.e., 1.0). In contrast, the same probability of rupture is obtained for changing the electric field from 410 to 630 Vcm-1 by varying the cholesterol mole fraction in the membranes from 0 to 0.40. These results suggest that the required electric field for the rupture decreases with the increase of surface charge density but increases with the increase of cholesterol. We also quantify the electric field for the rupture of GUVs containing anionic mole fraction of 0.40 under various osmotic pressures. In the absence of osmotic pressure, the electric field for the rupture is obtained 430 Vcm-1, whereas the field is 300 Vcm-1 in the presence of 17 mOsmL-1, indicating the instability of GUVs at higher osmotic pressures. These investigations open an avenue of possibilities for finding the electric field dependent rupture of cell-like vesicles along with the insight of biophysical and biochemical processes.
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Affiliation(s)
- Md. Kabir Ahamed
- Department of Physics, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh
| | - Marzuk Ahmed
- Department of Physics, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh
| | - Mohammad Abu Sayem Karal
- Department of Physics, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh
- * E-mail:
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9
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Kent B, Rossa C. Development of a tissue discrimination electrode embedded surgical needle using vibro-tactile feedback derived from electric impedance spectroscopy. Med Biol Eng Comput 2021; 60:19-31. [PMID: 34677740 DOI: 10.1007/s11517-021-02454-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 09/17/2021] [Indexed: 12/01/2022]
Abstract
Some tumours may not be detected by ultrasound during biopsy, but recent evidence has shown that different tissues can be discerned by electric impedance. This paper explores the application of vibrotactile feedback in an electrode embedded needle to help classify tissue during fine-needle aspiration biopsy from bioimpedance measurements. The process uses electric impedance spectroscopy from 10 Hz to 349 kHz to fit the double-dispersion Cole model through the Newton-Raphson algorithm. A Naive Bayes classifier is then used on the equivalent circuit parameters to estimate the tissue at the needle tip. The method is validated through a series of experiments and user trials. The results show that the vibrotactile feedback is able to help the operator in determining the tissue the needle is in, suggesting that this may prove to be a useful supplement to the standard procedure used today. Graphical Abstract This paper explores the application of vibrotactile feedback for an electrode embedded needle to help classify tissue from electric impedance measurements. The data is fit to an equivalent circuit using Newton- Raphon's method. A Naive Bayes classifier is trained and later used in an experiment to estimate the tissue at the needle tip and provide an assigned vibrotacticle feedback to the user.
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Affiliation(s)
- Brayden Kent
- Faculty of Engineering and Applied Science, Ontario Tech University, Oshawa, Ontario, Canada.
| | - Carlos Rossa
- Faculty of Engineering and Applied Science, Ontario Tech University, Oshawa, Ontario, Canada
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10
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Najar-Villarreal F, Boyle EAE, Vahl CI, Kang Q, Houser TA, Gonzalez JM, Amamcharla J, Vega D, Kastner JJ, Cox MK. Correlation of Bioelectrical Impedance With Freshness Quality Attributes of Beef Longissimus Lumborum Steaks. MEAT AND MUSCLE BIOLOGY 2021. [DOI: 10.22175/mmb.11704] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
The quality attributes of beef longissimus lumborum during 15 d of retail display were assessed using surface bioelectrical impedance analysis (S-BIA) and internal bioelectrical impedance analysis (I-BIA). Beef loins (N = 18) were obtained from 3 commercial processors with 3 postmortem (PM) ages (27, 34, and 37 d). Loins were fabricated into twelve 2.54-cm-thick steaks, subdivided into 6 consecutively cut pairs, and randomly assigned to one of 6 display days (DD): 0, 3, 6, 9, 12, or 15. Steaks were assessed for S-BIA and I-BIA. Three locations were analyzed within each steak: top, middle, and bottom. Microbiological analysis, BIA, pH, instrumental color, proximate composition, and lipid oxidation were measured. There was a location × PM day × DD interaction (P < 0.05) for longissimus lumborum steaks for S-BIA. Among all 3 locations, steaks aged 27 d had higher (P < 0.05) S-BIA values on day 9 and 12 than steaks aged 34 and 37 d. There were no location × PM day × DD or two-way interactions (P > 0.05) for I-BIA. Display day affected (P < 0.05) all instrumental color data regardless of PM aging times. Among all PM aging times, steaks aged 27 d were 13% and 7% higher for a* and b* , respectively, compared with 34 and 37 d PM. There was a PM day × DD interaction (P < 0.05) for aerobic plate counts (APC). From day 0 and 9 of display, APC of steaks aged 27 d PM were 1 to 2.0 log colony-forming units/cm 2 lower than steaks aged 34 and 37 d. Quality attributes, including a*, b* , APC, and thiobarbituric acid reactive substances, were correlated (r = 0.70, − 0.64, − 0.56, and 0.69, respectively) with S-BIA. Overall, BIA values increased on aerobically packaged longissimus lumborum steaks and were correlated with various freshness quality parameters.
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Affiliation(s)
| | | | | | - Qing Kang
- Kansas State Universtity Department of Statistics
| | | | | | | | - Daniel Vega
- Kansas State University Department of Animal Sciences and Industry
| | - Justin J. Kastner
- Kansas State Universtity Department of Diagnostic Medicine/Pathobiology
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Groenendaal W, Lee S, van Hoof C. Wearable Bioimpedance Monitoring: Viewpoint for Application in Chronic Conditions. JMIR BIOMEDICAL ENGINEERING 2021; 6:e22911. [PMID: 38907374 PMCID: PMC11041432 DOI: 10.2196/22911] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 03/01/2021] [Accepted: 04/06/2021] [Indexed: 01/20/2023] Open
Abstract
Currently, nearly 6 in 10 US adults are suffering from at least one chronic condition. Wearable technology could help in controlling the health care costs by remote monitoring and early detection of disease worsening. However, in recent years, there have been disappointments in wearable technology with respect to reliability, lack of feedback, or lack of user comfort. One of the promising sensor techniques for wearable monitoring of chronic disease is bioimpedance, which is a noninvasive, versatile sensing method that can be applied in different ways to extract a wide range of health care parameters. Due to the changes in impedance caused by either breathing or blood flow, time-varying signals such as respiration and cardiac output can be obtained with bioimpedance. A second application area is related to body composition and fluid status (eg, pulmonary congestion monitoring in patients with heart failure). Finally, bioimpedance can be used for continuous and real-time imaging (eg, during mechanical ventilation). In this viewpoint, we evaluate the use of wearable bioimpedance monitoring for application in chronic conditions, focusing on the current status, recent improvements, and challenges that still need to be tackled.
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Affiliation(s)
| | - Seulki Lee
- Imec the Netherlands / Holst Centre, Eindhoven, Netherlands
| | - Chris van Hoof
- Imec, Leuven, Belgium
- One Planet Research Center, Wageningen, Netherlands
- Department of Engineering Science, KU Leuven, Leuven, Belgium
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12
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Saha A, Bajpai A, Krishna V, Bhattacharya S. Evolving Paradigm of Prothrombin Time Diagnostics with Its Growing Clinical Relevance towards Cardio-Compromised and COVID-19 Affected Population. SENSORS (BASEL, SWITZERLAND) 2021; 21:2636. [PMID: 33918646 PMCID: PMC8068903 DOI: 10.3390/s21082636] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 03/17/2021] [Accepted: 03/22/2021] [Indexed: 01/30/2023]
Abstract
Prothrombin time (PT) is a significant coagulation (hemostasis) biomarker used to diagnose several thromboembolic and hemorrhagic complications based on its direct correlation with the physiological blood clotting time. Among the entire set of PT dependents, candidates with cardiovascular ailments are the major set of the population requiring lifelong anticoagulation therapy and supervised PT administration. Additionally, the increasing incidence of COVID affected by complications in coagulation dynamics has been strikingly evident. Prolonged PT along with sepsis-induced coagulopathy (SIC score > 3) has been found to be very common in critical COVID or CAC-affected cases. Considering the growing significance of an efficient point-of-care PT assaying platform to counter the increasing fatalities associated with cardio-compromised and coagulation aberrations propping up from CAC cases, the following review discusses the evolution of lab-based PT to point of care (PoC) PT assays. Recent advances in the field of PoC PT devices utilizing optics, acoustics, and mechanical and electrochemical methods in microsensors to detect blood coagulation are further elaborated. Thus, the following review holistically aims to motivate the future PT assay designers/researchers by detailing the relevance of PT and associated protocols for cardio compromised and COVID affected along with the intricacies of previously engineered PoC PT diagnostics.
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Affiliation(s)
- Anubhuti Saha
- Design Program, Indian Institute of Technology, Kanpur 208016, India;
- Microsystems Fabrication Laboratory, Indian Institute of Technology, Kanpur 208016, India
| | - Ashutosh Bajpai
- LPS Institute of Cardiology, GSVM Medical College, Kanpur 208002, India; (A.B.); (V.K.)
| | - Vinay Krishna
- LPS Institute of Cardiology, GSVM Medical College, Kanpur 208002, India; (A.B.); (V.K.)
| | - Shantanu Bhattacharya
- Design Program, Indian Institute of Technology, Kanpur 208016, India;
- Microsystems Fabrication Laboratory, Indian Institute of Technology, Kanpur 208016, India
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13
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Mabrouk S, Whittingslow D, Inan OT. Robust Method for Mid-Activity Tracking and Evaluation of Ankle Health Post-Injury. IEEE Trans Biomed Eng 2021; 68:1341-1350. [PMID: 32997618 DOI: 10.1109/tbme.2020.3027477] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVE To present a robust methodology for evaluating ankle health during ambulation using a wearable device. Methods: We developed a novel data capture system that leverages changes within the ankle during ambulation for real-time tracking of bioimpedance. The novel analysis compares the range of reactance at 5 kHz to the range of reactance at 100 kHz; which removes the technique's previous reliance on a known baseline. To aid in interpretation of the measurements, we developed a quantitative simulation model based on a literature review of the effects on joint bioimpedance of variations in edematous fluid volume, muscle fiber tears, and blood flow changes. Results: The results of the simulation predicted a significant difference in the ratio of the range of the reactance from 5 kHz to 100 kHz between the healthy and injured ankles. These results were validated in 15 subjects - with 11 healthy ankles and 7 injured ankles measured. The injured subjects had lateral ankle sprains 2-4 weeks prior to the measurement. The analysis technique differentiated between the healthy and the injured population (p<<0.01), and a correlation (R = 0.8) with a static protocol previously validated for its sensitivity to edema. Conclusion: The technology presented can detect variations in ankle edema and structural integrity of ankles, and thus could provide valuable feedback to clinicians and patients during the rehabilitation of an ankle injury. Significance: This technology could lead to better-informed decision making regarding a patient's readiness to return to activity and / or tailoring rehabilitation activities to an individual's changing needs.
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Lindeboom L, Lee S, Wieringa F, Groenendaal W, Basile C, van der Sande F, Kooman J. On the potential of wearable bioimpedance for longitudinal fluid monitoring in end-stage kidney disease. Nephrol Dial Transplant 2021; 37:2048-2054. [PMID: 33544863 DOI: 10.1093/ndt/gfab025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Indexed: 11/12/2022] Open
Abstract
Bioimpedance spectroscopy (BIS) has proven to be a promising non-invasive technique for fluid monitoring in HD patients. While current BIS-based monitoring of pre- and post-dialysis fluid status utilizes benchtop devices, designed for intramural use, advancements in micro-electronics have enabled the development of wearable bioimpedance systems. Wearable systems meanwhile can offer a similar frequency range for current injection as commercially available benchtop devices. This opens opportunities for unobtrusive longitudinal fluid status monitoring, including transcellular fluid shifts, with the ultimate goal of improving fluid management, thereby lowering mortality and improving quality of life for HD patients. Ultra-miniaturized wearable devices can also offer simultaneous acquisition of multiple other parameters, including hemodynamic parameters. Combination of wearable BIS and additional longitudinal multiparametric data may aid in the prevention of both hemodynamic instability as well as fluid overload. The opportunity to also acquire data during interdialytic periods using wearable devices likely will give novel pathophysiological insights and the development of smart (predicting) algorithms could contribute to personalizing dialysis schemes and ultimately to autonomous (nocturnal) home dialysis. This review provides an overview of current research regarding wearable bioimpedance, with special attention to applications in ESKD patients. Furthermore, we present an outlook on the future use of wearable bioimpedance within dialysis practice.
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Affiliation(s)
- Lucas Lindeboom
- imec The Netherlands/Holst Centre, Health Research, High Tech Campus 31, Eindhoven, The Netherlands
| | - Seulki Lee
- imec The Netherlands/Holst Centre, Health Research, High Tech Campus 31, Eindhoven, The Netherlands
| | - Fokko Wieringa
- imec The Netherlands/Holst Centre, Health Research, High Tech Campus 31, Eindhoven, The Netherlands.,Department of Nephrology, University Medical Center Utrecht, The Netherlands
| | - Willemijn Groenendaal
- imec The Netherlands/Holst Centre, Health Research, High Tech Campus 31, Eindhoven, The Netherlands
| | - Carlo Basile
- Division of Nephrology, Miulli General Hospital, Acquaviva delle Fonti, Italy
| | - Frank van der Sande
- Division of Nephrology, Department of Internal Medicine, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Jeroen Kooman
- Division of Nephrology, Department of Internal Medicine, Maastricht University Medical Center, Maastricht, The Netherlands
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15
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Ahn J, Ahn JH, Yoon S, Son MY, Cho S, Oh JH. Quantification of non-alcoholic fatty liver disease progression in 3D liver microtissues using impedance spectroscopy. Biomaterials 2020; 268:120599. [PMID: 33341736 DOI: 10.1016/j.biomaterials.2020.120599] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 11/07/2020] [Accepted: 12/07/2020] [Indexed: 01/10/2023]
Abstract
Non-alcoholic fatty liver disease (NAFLD) has become a global pandemic. However, a pharmacological cure has not been approved for NAFLD treatment. The greatest barriers to the development of new treatments are the ambiguous criteria among the NAFLD stages and the lack of quantitative methodologies for its disease assessment in a translatable preclinical model. In this study, we developed impedance assessment systems to quantify NAFLD progression in three-dimensional (3D) liver microtissue (hMT). The hMT model undergoing NAFLD represents clinical-like characteristics for a range of stages, such as lipid accumulation, cell ballooning, and stiffening. Each stage can be quantitatively assessed by an impedance system with microchannels under constant or dynamic pressure, depending on the relevant mechanical and morphological changes used in the clinical assessment of NAFLD. We determined a correlation between the impedance parameters and pathophysiological characteristics, such as gap widening and cytoplasmic deformation associated with NAFLD progression using bioimpedance simulation, showing hMTs struggling to return to normal states. In addition, we identified the relative stiffness to assess fibrogenesis from the correlation of resistance change and elongation length into the smaller channel of hMTs. We hope this methodology will have a significant impact on drug development by facilitating improved NAFLD assessment.
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Affiliation(s)
- Jaehwan Ahn
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea; Department of Predictive Toxicology, Korea Institute of Toxicology (KIT), Daejeon, 34114, Republic of Korea
| | - Jun-Ho Ahn
- Department of Predictive Toxicology, Korea Institute of Toxicology (KIT), Daejeon, 34114, Republic of Korea; Bio Medical Research Center, Bio Medical & Health Division, Korea Testing Laboratory (KTL), Seoul, 08389, Republic of Korea
| | - Seokjoo Yoon
- Department of Predictive Toxicology, Korea Institute of Toxicology (KIT), Daejeon, 34114, Republic of Korea
| | - Mi-Young Son
- Stem Cell Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, Republic of Korea
| | - Sungbo Cho
- Department of Electronic Engineering, Gachon University, Seongnam, 13120, Republic of Korea.
| | - Jung-Hwa Oh
- Department of Predictive Toxicology, Korea Institute of Toxicology (KIT), Daejeon, 34114, Republic of Korea.
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16
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Sato H, Nakamura T, Kusuhara T, Kenichi K, Kuniyasu K, Kawashima T, Hanayama K. Effectiveness of impedance parameters for muscle quality evaluation in healthy men. J Physiol Sci 2020; 70:53. [PMID: 33129254 PMCID: PMC10717475 DOI: 10.1186/s12576-020-00780-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 10/17/2020] [Indexed: 12/12/2022]
Abstract
We investigated the relationship between impedance parameters and skeletal muscle function in the lower extremities, as well as the effectiveness of impedance parameters in evaluating muscle quality. Lower extremity impedance of 19 healthy men (aged 23-31 years) measured using the direct segmental multi-frequency bioelectrical impedance analysis were arc-optimized using the Cole-Cole model, following which phase angle (PA), [Formula: see text], and β were estimated. Skeletal muscle function was assessed by muscle thickness, muscle intensity, and isometric knee extension force (IKEF). IKEF was positively correlated with PA (r = 0.58, p < 0.01) and β (r = 0.34, p < 0.05) was negatively correlated with [Formula: see text] (r = - 0.43, p < 0.01). Stepwise multiple regression analysis results revealed that PA, β, and [Formula: see text] were correlated with IKEF independently of muscle thickness. This study suggests that arc-optimized impedance parameters are effective for evaluating muscle quality and prediction of muscle strength.
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Affiliation(s)
- Hiroki Sato
- Department of Radiological Technology, Graduate School of Health Sciences, Okayama University, 2-5-1, Shikata-cho, Kita-ku, Okayama, Okayama, 700-8558, Japan.
- Department of Rehabilitation Center, Kawasaki Medical School Hospital, 577, Matsushima, Kurashiki, Okayama, 701-0192, Japan.
| | - Takao Nakamura
- Department of Radiological Technology, Graduate School of Health Sciences, Okayama University, 2-5-1, Shikata-cho, Kita-ku, Okayama, Okayama, 700-8558, Japan
| | - Toshimasa Kusuhara
- Department of Radiological Technology, Graduate School of Health Sciences, Okayama University, 2-5-1, Shikata-cho, Kita-ku, Okayama, Okayama, 700-8558, Japan
| | - Kobara Kenichi
- Department of Physical Therapist, Faculty of Rehabilitation, Kawasaki University of Medical Welfare, 288, Matsushima, Kurashiki, Okayama, 701-0193, Japan
| | - Katsushi Kuniyasu
- Department of Physical Therapist, Faculty of Rehabilitation, Kawasaki University of Medical Welfare, 288, Matsushima, Kurashiki, Okayama, 701-0193, Japan
| | - Takaki Kawashima
- Department of Physical Therapist, Kawasaki Junior College of Rehabilitation, 672, Matsushima, Kurashiki, Okayama, 701-0192, Japan
| | - Kozo Hanayama
- Department of Rehabilitation Medicine, Kawasaki Medical School, 577, Matsushima, Kurashiki, Okayama, 701-0192, Japan
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17
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Devarasu N, Sudha GF. Dual-frequency bioelectrical phase angle to estimate the platelet count for the prognosis of dengue fever in Indian children. BIOMED ENG-BIOMED TE 2020; 65:417-428. [DOI: 10.1515/bmt-2018-0203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 08/30/2019] [Indexed: 11/15/2022]
Abstract
Abstract
A noninvasive investigation to ascertain the platelet (PLT) count was conducted on 44 hospitalized dengue hemorrhagic fever (DHF) subjects, male and female aged between 3 and 14 years using bioelectrical phase angle (BPhA). Among the 44 subjects, 30 subjects were confirmed to be non-structural protein-1 (NS1) positive at the time of admission, whose blood investigations such as hematocrit (HCT) level, PLT count, aspartate aminotransferase (AST) level and alanine aminotransferase (ALT) level were performed for the classification of risk as low-risk (LR) and high-risk (HR) DHF. It was found that the BPhA of the body reflects a linear correlation with the PLT count. To provide a better and more accurate estimate of PLT, a dual-frequency method is proposed to calculate the phase angle of the total body. The resistance at 5 kHz and reactance at 100 kHz were used to estimate the phase angle of the total body. The statistical analysis identified that the PLT count estimated using the proposed dual-frequency method shows a good correlation with the blood investigation results. In addition, statistical analysis of the proposed method on other fever subjects indicated a significant difference with DHF.
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Affiliation(s)
- Neelamegam Devarasu
- Department of Electronics and Communication Engineering , Pondicherry Engineering College , Puducherry 605014 , India
| | - Gnanou Florence Sudha
- Department of Electronics and Communication Engineering , Pondicherry Engineering College , Puducherry 605014 , India
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18
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Application of dielectric spectroscopy to unravel the physiological state of microorganisms: current state, prospects and limits. Appl Microbiol Biotechnol 2020; 104:6101-6113. [DOI: 10.1007/s00253-020-10677-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 05/04/2020] [Accepted: 05/10/2020] [Indexed: 12/16/2022]
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19
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Zhbanov A, Yang S. Electrochemical Impedance Characterization of Blood Cell Suspensions-Part 2: Three-Phase Systems With Single-Shelled Particles. IEEE Trans Biomed Eng 2020; 67:2979-2989. [PMID: 32091989 DOI: 10.1109/tbme.2020.2975816] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The analyses presented in Part 1 are expanded to three-phase composite materials. The theory developed in Part 1 is used for analytical and numerical calculations of dielectric spectra. In this study, three-phase systems with single-shelled particles were considered. The disordered particle distribution, aligned orientation of particles, and particles placed in different lattice structures are studied. It is shown that both two-phase and three-phase composites exhibit β-dispersion, while three-phase composites additionally exhibit δ-dispersion. This is the fundamental difference in the spectra for two- and three-phase materials. In the case of aligned orientation, the effective permittivity in the direction perpendicular to the spheroid plane exhibits a maximum at a volume fraction of approximately 0.5. Both two- and three-phase materials display this behavior. This may be of interest for the development of new metamaterials. The dielectric properties of composite materials with random distribution and periodic arrangement of particles differ significantly. The dielectric spectrum of erythrocyte suspension in plasma was measured by means of electrochemical impedance spectroscopy. The measurement system consisted of a small chamber with two planar electrodes placed at the bottom and an impedance analyzer. The dielectric properties of erythrocyte cytoplasm and membrane were numerically determined based on experimental data. The measurement of the dielectric properties of whole blood and blood components is very promising for various medical applications.
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20
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Elblbesy MA. Electrical Analysis Of Normal And Diabetic Blood For Evaluation Of Aggregation And Coagulation Under Different Rheological Conditions. MEDICAL DEVICES-EVIDENCE AND RESEARCH 2019; 12:435-442. [PMID: 31695524 PMCID: PMC6805249 DOI: 10.2147/mder.s223794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Accepted: 09/16/2019] [Indexed: 11/23/2022] Open
Abstract
Introduction Erythrocyte aggregation and blood coagulation are of great interest and are still under investigation by many researchers. Erythrocytes have a direct effect on hemorheological properties. Real-time in vitro studies on blood coagulation and aggregation provide a chance to understand their mechanisms in normal and pathological conditions. Additionally, this method offers control over the physical and chemical conditions during the study. Objective The present study introduced a simple in vitro technique to study blood aggregation and coagulation under controlled conditions. Methods The technique used in this study is based on the measurement of the electrical properties of blood. A simple flow chamber was made from two cylinders with a gap between them. The outer cylinder remains stationary, and the inner cylinder rotates about its axis. The inner cylinder velocity is controlled by a stepper motor. Blood samples are introduced in the gap between the two cylinders. Capacitance and impedance of blood samples were recorded by two electrodes attached to the outer cylinders and in direct contact with blood. Results Quantitative parameters were extracted from the capacitance and impedance time courses. These parameters were used to describe the aggregation and coagulation processes under different shear rates. Strong correlations between the aggregation index and shear rate were found for normal and diabetic blood samples. Additionally, strong negative correlations of coagulation time were found for normal and diabetic blood samples. In conclusion, the electrical analysis of blood reflects well the interactions between internal blood contents. Conclusion The parameters extracted from this technique can be used in the quantitative description of hemorheological processes under different physical conditions.
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Affiliation(s)
- Mohamed A Elblbesy
- Department of Medical Biophysics, Medical Research Institute, Alexandria University, Alexandria, Egypt
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21
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Xie X, Zhang Z, Ge X, Zhao X, Hao L, Cheng Z, Zhou W, Du Y, Wang L, Tian F, Xu X. Particle Self-Aligning, Focusing, and Electric Impedance Microcytometer Device for Label-Free Single Cell Morphology Discrimination and Yeast Budding Analysis. Anal Chem 2019; 91:13398-13406. [PMID: 31596074 DOI: 10.1021/acs.analchem.9b01509] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Microfluidic electric impedance flow cytometry (IFC) devices have been applied in single cell analysis, such as cell counting, volume discrimination, cell viability, etc. A cell's shape provides specific information about cellular physiological and pathological conditions, especially in microorganisms such as yeast. In this study, the particle orientation focusing was theoretically analyzed and realized by hydrodynamics. The pulse width (passing time for the particles) of the conductance signal was used to discriminate particle shapes. Spherical and rod-shaped particles with similar volumes/lengths were differentiated by the IFC device, using the impedance pulse parameters of the events. Then, typical late-budding, early budding, and unbudded yeast cells were distinguished by the width, amplitude, and ratio of width to amplitude (R) of the impedance pulse. The pulse amplitude and the R combination gate for identifying the late-budding yeast was estimated through the statistic results. Using the gate, the late-budding rates under different conditions were calculated. Late-budding rates obtained using our method showed a high correlation (R2 = 0.83) with the manual cell counting result and represented the budding status of yeast cells under different conditions proficiently. Thus, the late-budding rate calculated using the above method can be used as a qualitative parameter to assess the reproductive performance of yeast and whether a yeast culturing environment is optimal. This IFC device and cell shape discrimination method is very simple and could be applied in the fermentation industry and other microorganisms' discrimination as a rapid analysis technique in the future.
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Affiliation(s)
- Xinwu Xie
- Institute of Medical Support Technology , Academy of Military Science , No.106 Wandong Road , Hedong District, Tianjin 300161 , China.,National Bio-Protection Engineering Center , No.106 Wandong Road , Hedong District, Tianjin 300161 , China
| | - Zhiwei Zhang
- Institute of Medical Support Technology , Academy of Military Science , No.106 Wandong Road , Hedong District, Tianjin 300161 , China.,School of Electronic Information and Automation , Tianjin University of Science and Technology , No.1038 Dagunan Road , Hexi District, Tianjin 300222 , China
| | - Xiang Ge
- Institute of Medical Support Technology , Academy of Military Science , No.106 Wandong Road , Hedong District, Tianjin 300161 , China.,School of Electronic Information and Automation , Tianjin University of Science and Technology , No.1038 Dagunan Road , Hexi District, Tianjin 300222 , China
| | - Xiaohao Zhao
- Institute of Medical Support Technology , Academy of Military Science , No.106 Wandong Road , Hedong District, Tianjin 300161 , China.,School of Electronic Information and Automation , Tianjin University of Science and Technology , No.1038 Dagunan Road , Hexi District, Tianjin 300222 , China
| | - Limei Hao
- Institute of Medical Support Technology , Academy of Military Science , No.106 Wandong Road , Hedong District, Tianjin 300161 , China.,National Bio-Protection Engineering Center , No.106 Wandong Road , Hedong District, Tianjin 300161 , China
| | - Zhen Cheng
- Beijing CapitalBio Technology Co. Ltd. , No. 88 block, Kechuang Sixth Rd., Beijing Economic and Technological Development Zone , Beijing 101111 , China
| | - Weibin Zhou
- School of Electronic Information and Automation , Tianjin University of Science and Technology , No.1038 Dagunan Road , Hexi District, Tianjin 300222 , China
| | - Yaohua Du
- Institute of Medical Support Technology , Academy of Military Science , No.106 Wandong Road , Hedong District, Tianjin 300161 , China.,National Bio-Protection Engineering Center , No.106 Wandong Road , Hedong District, Tianjin 300161 , China
| | - Lei Wang
- CapitalBio Corporation , National Engineering Research Center for Beijing Biochip Technology , 18 Life Science Parkway , Changping District, Beijing 102206 , China
| | - Feng Tian
- Institute of Medical Support Technology , Academy of Military Science , No.106 Wandong Road , Hedong District, Tianjin 300161 , China
| | - Xinxi Xu
- Institute of Medical Support Technology , Academy of Military Science , No.106 Wandong Road , Hedong District, Tianjin 300161 , China
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22
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Rutkove SB, Sanchez B. Electrical Impedance Methods in Neuromuscular Assessment: An Overview. Cold Spring Harb Perspect Med 2019; 9:cshperspect.a034405. [PMID: 30291145 DOI: 10.1101/cshperspect.a034405] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Electrical impedance methods have been used as evaluation tools in biological and medical science for well over 100 years. However, only recently have these techniques been applied specifically to the evaluation of conditions affecting nerve and muscle. This specific application, termed electrical impedance myography (EIM), is finding wide application as it can provide a quantitative index of muscle condition that can assist with diagnosis, track disease progression, and assess the beneficial impact of therapy. Using noninvasive surface methods, EIM has been studied in a number of conditions ranging from amyotrophic lateral sclerosis to muscular dystrophy to disuse atrophy. Data support that the technique is sensitive to disease status and can offer the possibility of performing clinical trials with fewer subjects than would otherwise be possible. Recent advances in the field include improved approaches for using EIM as a "virtual biopsy" and the development of combined needle impedance-electromyography technology.
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Affiliation(s)
- Seward B Rutkove
- Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215
| | - Benjamin Sanchez
- Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215
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23
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Zhang F, Sanchez B, Rutkove SB, Yang Y, Zhong H, Li J, Teng Z. Numerical estimation of Fricke-Morse impedance model parameters using single-frequency sinusoidal excitation. Physiol Meas 2019; 40:09NT01. [PMID: 31357182 DOI: 10.1088/1361-6579/ab3666] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE The Fricke-Morse impedance model is widely used in bioelectrical impedance analysis (BIA), which is usually fitted by multi-frequency electrical impedance data. Here, we propose a novel numerical method for estimating the model parameters using single-frequency sinusoidal excitation. APPROACH A single-frequency sinusoidal signal is used as the current excitation, from which the initial transient, the steady-state and the ending transient voltage responses along with the current excitation are recorded. The model parameters can be then estimated with numerical calculations from the acquired signals. MAIN RESULTS Simulation and experimental measurements are verified on a 2R1C circuit by using a 50 kHz sinusoidal current excitation. The results show that the maximum relative errors of the estimated model parameters are <1% in simulation with 2% noise and <2% in experimental measurement. SIGNIFICANCE The proposed method could extend the applications of wideband BIA by using single-frequency excitation, rather than multi-frequency excitation as is done today.
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Affiliation(s)
- Fu Zhang
- Department of Electronic Science and Technology, Hunan University, Changsha, Hunan, People's Republic of China. Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States of America
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24
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Ochandio Fernández A, Olguín Pinatti CA, Masot Peris R, Laguarda-Miró N. Freeze-Damage Detection in Lemons Using Electrochemical Impedance Spectroscopy. SENSORS 2019; 19:s19184051. [PMID: 31546932 PMCID: PMC6767336 DOI: 10.3390/s19184051] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 07/31/2019] [Indexed: 01/30/2023]
Abstract
Lemon is the most sensitive citrus fruit to cold. Therefore, it is of capital importance to detect and avoid temperatures that could damage the fruit both when it is still in the tree and in its subsequent commercialization. In order to rapidly identify frost damage in this fruit, a system based on the electrochemical impedance spectroscopy technique (EIS) was used. This system consists of a signal generator device associated with a personal computer (PC) to control the system and a double-needle stainless steel electrode. Tests with a set of fruits both natural and subsequently frozen-thawed allowed us to differentiate the behavior of the impedance value depending on whether the sample had been previously frozen or not by means of a single principal components analysis (PCA) and a partial least squares discriminant analysis (PLS-DA). Artificial neural networks (ANNs) were used to generate a prediction model able to identify the damaged fruits just 24 hours after the cold phenomenon occurred, with sufficient robustness and reliability (CCR = 100%).
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Affiliation(s)
- Adrián Ochandio Fernández
- Escuela Técnica Superior de Ingeniería del Diseño, Universitat Politècnica de València, Camí de Vera s/n, 46022 Valencia, Spain.
| | - Cristian Ariel Olguín Pinatti
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Unidad Mixta Universitat Politècnica de València - Universitat de València, Camí de Vera s/n, 46022, Valencia, Spain.
| | - Rafael Masot Peris
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Unidad Mixta Universitat Politècnica de València - Universitat de València, Camí de Vera s/n, 46022, Valencia, Spain.
| | - Nicolás Laguarda-Miró
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Unidad Mixta Universitat Politècnica de València - Universitat de València, Camí de Vera s/n, 46022, Valencia, Spain.
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25
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Lab-On-A-Chip Device for Yeast Cell Characterization in Low-Conductivity Media Combining Cytometry and Bio-Impedance. SENSORS 2019; 19:s19153366. [PMID: 31370234 PMCID: PMC6695822 DOI: 10.3390/s19153366] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 07/24/2019] [Accepted: 07/29/2019] [Indexed: 01/08/2023]
Abstract
This paper proposes a simple approach to optimize the operating frequency band of a lab-on-a-chip based on bio-impedance cytometry for a single cell. It mainly concerns applications in low-conductivity media. Bio-impedance allows for the characterization of low cell concentration or single cells by providing an electrical signature. Thus, it may be necessary to perform impedance measurements up to several tens of megahertz in order to extract the internal cell signature. In the case of single cells, characterization is performed in a very small volume down to 1 pL. At the same time, measured impedances increase from tens of kilo-ohms for physiological liquids up to several mega-ohms for low conductivity media. This is, for example, the case for water analysis. At frequencies above hundreds of kilohertz, parasitic effects, such as coupling capacitances, can prevail over the impedance of the sample and completely short-circuit measurements. To optimize the sensor under these conditions, a complete model of a cytometry device was developed, including parasitic coupling capacitances of the sensor to take into account all the impedances. It appears that it is possible to increase the pass band by optimizing track geometries and placement without changing the sensing area. This assumption was obtained by measuring and comparing electrical properties of yeast cells in a low-conductivity medium (tap water). Decreased coupling capacitance by a factor higher than 10 was obtained compared with a previous non-optimized sensor, which allowed for the impedance measurement of all electrical properties of cells as small as yeast cells in a low-conductivity medium.
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26
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Kim BJ, Lee YS, Zhbanov A, Yang S. A physiometer for simultaneous measurement of whole blood viscosity and its determinants: hematocrit and red blood cell deformability. Analyst 2019; 144:3144-3157. [PMID: 30942211 DOI: 10.1039/c8an02135j] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, a microfluidic-based physiometer capable of measuring whole blood viscosity, hematocrit, and red blood cell (RBC) deformability on a chip is introduced. The physiometer consists of two major parts: a hydrodynamic component for whole blood viscosity measurement and an electronic component for hematocrit and RBC deformability measurement. In the hydrodynamic component, the whole blood is infused with phosphate buffered saline as a reference fluid for estimation of the whole blood viscosity. At a given flow rate, ten sets of whole blood viscosity readings are successfully obtained over a wide range of shear rates; this is achieved via a series of geometrically optimized microchannel arrays. In the electronic component, analysis of the whole blood impedance spectrum under flowing conditions reveals the electrical characteristics of the blood: the cytoplasm resistance (Rcytoplsm), plasma resistance (Rplasma), and RBC membrane capacitance (constant phase element). The hematocrit is estimated from Rcytoplsm and Rplasma, while the RBC deformation index is determined from the membrane capacitance change of the RBC. Each unique function is experimentally demonstrated and compared to the corresponding gold standard method. The whole blood viscosity measured using the physiometer is 0.8 ± 1.4% in normalized difference compared to that using a rotational cone-and-plate viscometer. For the hematocrit measurement, the coefficient of variation for the physiometer ranges from 0.3 to 1.2% which is lower than the one obtained from centrifugation. In the deformability measurement, there is a strong linear correlation (R2 = 0.97) between the deformation index acquired by image processing and the change in the membrane capacitance acquired by using the physiometer. The effects of the hematocrit and RBC deformability on the whole blood viscosity are also demonstrated. For simultaneous and reliable measurement on a chip, a physiometer equipped with a temperature-control system is prepared. Lab-made software enables the measurement of the three target indices and the temperature control in an automated manner. By using this system, the temperature is controlled to 36.9 ± 0.2 °C which greatly matches with the target temperature (37.0 °C) and it is varied from 25 °C to 43 °C. The developed physiometer is potentially applicable for a comprehensive analysis of biophysical indices in whole blood.
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Affiliation(s)
- Byung Jun Kim
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea.
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27
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Taraska JW. A primer on resolving the nanoscale structure of the plasma membrane with light and electron microscopy. J Gen Physiol 2019; 151:974-985. [PMID: 31253697 PMCID: PMC6683668 DOI: 10.1085/jgp.201812227] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 06/10/2019] [Indexed: 12/20/2022] Open
Abstract
Taraska reviews the imaging methods that are being used to understand the structure of the plasma membrane at the molecular level. The plasma membrane separates a cell from its external environment. All materials and signals that enter or leave the cell must cross this hydrophobic barrier. Understanding the architecture and dynamics of the plasma membrane has been a central focus of general cellular physiology. Both light and electron microscopy have been fundamental in this endeavor and have been used to reveal the dense, complex, and dynamic nanoscale landscape of the plasma membrane. Here, I review classic and recent developments in the methods used to image and study the structure of the plasma membrane, particularly light, electron, and correlative microscopies. I will discuss their history and use for mapping the plasma membrane and focus on how these tools have provided a structural framework for understanding the membrane at the scale of molecules. Finally, I will describe how these studies provide a roadmap for determining the nanoscale architecture of other organelles and entire cells in order to bridge the gap between cellular form and function.
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Affiliation(s)
- Justin W Taraska
- Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD
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Kwon H, Rojas CR, Rutkove SB, Sanchez B. Three-harmonic optimal multisine input power spectrum for bioimpedance identification. Physiol Meas 2019; 40:05NT02. [PMID: 31026854 DOI: 10.1088/1361-6579/ab1cf3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE The attention towards optimal signals for measuring electrical bioimpedance (EBI) has increased recently due to the many advantages they offer such as, for example, reduced measuring time. Here, the design of a three-harmonic optimized multisine input power spectrum for measuring bioimpedance is considered. APPROACH The approach is based on designing the input power spectrum multisine excitation by optimizing a scalar function of the information matrix using the Fricke-Morse model. MAIN RESULTS Simple analytical equations are provided that can be adopted by the reader to optimize the multisine input power spectrum to satisfy any specific application-related EBI measurement. SIGNIFICANCE The presented signal may be a good choice of excitation signal in EBI applications where optimal excitation power spectrum is desired.
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Affiliation(s)
- H Kwon
- College of Science & Technology, Yonsei University, Wonju 26493, Republic of Korea
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Tanudjaja HJ, Hejase CA, Tarabara VV, Fane AG, Chew JW. Membrane-based separation for oily wastewater: A practical perspective. WATER RESEARCH 2019; 156:347-365. [PMID: 30928529 DOI: 10.1016/j.watres.2019.03.021] [Citation(s) in RCA: 207] [Impact Index Per Article: 41.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 02/26/2019] [Accepted: 03/14/2019] [Indexed: 06/09/2023]
Abstract
The large volumes of oily wastewater generated by various industries, such as oil and gas, food and beverage, and metal processing, need to be de-oiled prior to being discharged into the environment. Compared to conventional technologies such as dissolved air flotation (DAF), coagulation or solvent extraction, membrane filtration can treat oily wastewater of a much broader compositional range and still ensure high oil removals. In the present review, various aspects related to the practical implementation of membranes for the treatment of oily wastewater are summarized. First, sources and composition of oily wastewater, regulations that stipulate the extent of treatment needed before discharge, and the conventional technologies that enable such treatment are appraised. Second, commercially available membranes, membrane modules, operation modes and hybrids are overviewed, and their economics are discussed. Third, challenges associated with membrane filtration are examined, along with means to quantify and mitigate membrane fouling. Finally, perspectives on state-of-the-art techniques to facilitate better monitoring and control of such systems are briefly discussed.
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Affiliation(s)
- Henry J Tanudjaja
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 37459, Singapore
| | - Charifa A Hejase
- Department of Civil and Environmental Engineering, Michigan State University, East Lansing, MI, 48824, USA
| | - Volodymyr V Tarabara
- Department of Civil and Environmental Engineering, Michigan State University, East Lansing, MI, 48824, USA
| | - Anthony G Fane
- Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore, 637141, Singapore
| | - Jia Wei Chew
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 37459, Singapore; Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore, 637141, Singapore.
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Montoya P, Henao K, Pérez G, Salazar CA, Calderón J. Assessment of the moisturizing properties of a magnetic mask containing iron oxide particles. J Cosmet Dermatol 2019; 18:835-842. [DOI: 10.1111/jocd.12717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 06/19/2018] [Indexed: 11/30/2022]
Affiliation(s)
- Paula Montoya
- Centro de Investigación Innovación y Desarrollo de Materiales—CIDEMAT Universidad de Antioquia—UdeA Medellín Colombia
| | - Kelly Henao
- Centro de Investigación Innovación y Desarrollo de Materiales—CIDEMAT Universidad de Antioquia—UdeA Medellín Colombia
| | - Gianina Pérez
- Centro Colombiano de Tecnología—CECOLTEC Medellín Colombia
| | | | - Jorge Calderón
- Centro de Investigación Innovación y Desarrollo de Materiales—CIDEMAT Universidad de Antioquia—UdeA Medellín Colombia
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Bioimpedance Resistance Indices and Cell Membrane Capacitance Used to Assess Disease Status and Cell Membrane Integrity in Children with Nephrotic Syndrome. ScientificWorldJournal 2019; 2019:4274856. [PMID: 31210755 PMCID: PMC6532278 DOI: 10.1155/2019/4274856] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 04/17/2019] [Indexed: 11/17/2022] Open
Abstract
Background Accumulation of extracellular water (ECW) is a major clinical manifestation of nephrotic syndrome (NS) in children. Bioimpedance spectroscopy (BIS) is a simple, noninvasive technique that reflects body water volumes. BIS can further measure cell membrane capacitance (CM), which may be altered in NS. The aims of the study were to explore how BIS measurements could reflect disease status in NS, while avoiding prediction equations which are often only validated in adult populations. Methods The study involved 8 children (2-10 years) with active NS (ANS group), 5 of which were also studied at NS remission (NSR group), as well as 38 healthy children of similar age (HC group). BIS measurements determined resistances RINF, RE, and RI (reflecting total body water, extracellular water, and intracellular water) and CM. Also resistance indices based on height (H) were considered, RI = H2/R. Results It was found that RE and RINF were significantly lower in the ANS group than in both NSR and HC groups (p < 0.001). Corresponding resistance indices were significantly higher in the ANS group than in the NSR (p < 0.01) and the HC (p < 0.05) groups, in accordance with elevated water volumes in NS patients. Indices of intracellular water were not significantly different between groups. CM was significantly lower in the ANS group than in NSR and HC groups (p < 0.05). Conclusion BIS could distinguish children with active NS from well-treated and healthy children. Studies with more children are warranted.
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Gamal W, Wu H, Underwood I, Jia J, Smith S, Bagnaninchi PO. Impedance-based cellular assays for regenerative medicine. Philos Trans R Soc Lond B Biol Sci 2019; 373:rstb.2017.0226. [PMID: 29786561 DOI: 10.1098/rstb.2017.0226] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/08/2018] [Indexed: 12/22/2022] Open
Abstract
Therapies based on regenerative techniques have the potential to radically improve healthcare in the coming years. As a result, there is an emerging need for non-destructive and label-free technologies to assess the quality of engineered tissues and cell-based products prior to their use in the clinic. In parallel, the emerging regenerative medicine industry that aims to produce stem cells and their progeny on a large scale will benefit from moving away from existing destructive biochemical assays towards data-driven automation and control at the industrial scale. Impedance-based cellular assays (IBCA) have emerged as an alternative approach to study stem-cell properties and cumulative studies, reviewed here, have shown their potential to monitor stem-cell renewal, differentiation and maturation. They offer a novel method to non-destructively assess and quality-control stem-cell cultures. In addition, when combined with in vitro disease models they provide complementary insights as label-free phenotypic assays. IBCA provide quantitative and very sensitive results that can easily be automated and up-scaled in multi-well format. When facing the emerging challenge of real-time monitoring of three-dimensional cell culture dielectric spectroscopy and electrical impedance tomography represent viable alternatives to two-dimensional impedance sensing.This article is part of the theme issue 'Designer human tissue: coming to a lab near you'.
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Affiliation(s)
- W Gamal
- School of Electronic Engineering, Bangor University, Bangor LL57 1UT, UK
| | - H Wu
- School of Engineering, University of Edinburgh, Edinburgh EH9 3FB, UK
| | - I Underwood
- School of Engineering, University of Edinburgh, Edinburgh EH9 3FB, UK
| | - J Jia
- School of Engineering, University of Edinburgh, Edinburgh EH9 3FB, UK
| | - S Smith
- School of Engineering, University of Edinburgh, Edinburgh EH9 3FB, UK
| | - P O Bagnaninchi
- MRC Centre for Regenerative Medicine, University of Edinburgh, Edinburgh EH16 4UU, UK
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Permittivity of ex vivo healthy and diseased murine skeletal muscle from 10 kHz to 1 MHz. Sci Data 2019; 6:37. [PMID: 31000708 PMCID: PMC6472406 DOI: 10.1038/s41597-019-0045-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 03/15/2019] [Indexed: 12/31/2022] Open
Abstract
A better understanding of the permittivity property of skeletal muscle is essential for the development of new diagnostic tools and approaches for neuromuscular evaluation. However, there remain important knowledge gaps in our understanding of this property in healthy and diseased skeletal muscle, which hinder its translation into clinical application. Here, we report the permittivity of gastrocnemius muscle in healthy wild type mice and murine models of spinal muscular atrophy, muscular dystrophy, diabetes, amyotrophic lateral sclerosis and in a model of myofiber hypertrophy. Data were measured ex vivo from 10 kHz to 1 MHz using the four-electrode impedance technique. Additional quantitative histology information were obtained. Ultimately, the normative data reported will offer the scientific community the opportunity to develop more accurate models for the validation and prediction of experimental observations in both pre-clinical and clinical neuromuscular disease research. Design Type(s) | physiological data analysis objective • strain comparison design • ex vivo design | Measurement Type(s) | permittivity property | Technology Type(s) | impedance analyzer | Factor Type(s) | temporal_instant • frequency • Mouse Model • experimental condition | Sample Characteristic(s) | Mus musculus • skeletal muscle tissue |
Machine-accessible metadata file describing the reported data (ISA-Tab format)
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Carmeliet E. From Bernstein's rheotome to Neher-Sakmann's patch electrode. The action potential. Physiol Rep 2019; 7:e13861. [PMID: 30604910 PMCID: PMC6316177 DOI: 10.14814/phy2.13861] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 07/10/2018] [Accepted: 07/28/2018] [Indexed: 01/08/2023] Open
Abstract
The aim of this review was to provide an overview of the most important stages in the development of cellular electrophysiology. The period covered starts with Bernstein's formulation of the membrane hypothesis and the measurement of the nerve and muscle action potential. Technical innovations make discoveries possible. This was the case with the use of the squid giant axon, allowing the insertion of "large" intracellular electrodes and derivation of transmembrane potentials. Application of the newly developed voltage clamp method for measuring ionic currents, resulted in the formulation of the ionic theory. At the same time transmembrane measurements were made possible in smaller cells by the introduction of the microelectrode. An improvement of this electrode was the next major (r)evolution. The patch electrode made it possible to descend to the molecular level and record single ionic channel activity. The patch technique has been proven to be exceptionally versatile. In its whole-cell configuration it was the solution to measure voltage clamp currents in small cells. See also: https://doi.org/10.14814/phy2.13860 & https://doi.org/10.14814/phy2.13862.
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35
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Development of an adaptive electroporation system for intratumoral plasmid DNA delivery. Bioelectrochemistry 2018; 122:191-198. [DOI: 10.1016/j.bioelechem.2018.04.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Revised: 03/24/2018] [Accepted: 04/06/2018] [Indexed: 12/23/2022]
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Modena MM, Chawla K, Misun PM, Hierlemann A. Smart Cell Culture Systems: Integration of Sensors and Actuators into Microphysiological Systems. ACS Chem Biol 2018; 13:1767-1784. [PMID: 29381325 PMCID: PMC5959007 DOI: 10.1021/acschembio.7b01029] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Technological advances in microfabrication techniques in combination with organotypic cell and tissue models have enabled the realization of microphysiological systems capable of recapitulating aspects of human physiology in vitro with great fidelity. Concurrently, a number of analysis techniques has been developed to probe and characterize these model systems. However, many assays are still performed off-line, which severely compromises the possibility of obtaining real-time information from the samples under examination, and which also limits the use of these platforms in high-throughput analysis. In this review, we focus on sensing and actuation schemes that have already been established or offer great potential to provide in situ detection or manipulation of relevant cell or tissue samples in microphysiological platforms. We will first describe methods that can be integrated in a straightforward way and that offer potential multiplexing and/or parallelization of sensing and actuation functions. These methods include electrical impedance spectroscopy, electrochemical biosensors, and the use of surface acoustic waves for manipulation and analysis of cells, tissue, and multicellular organisms. In the second part, we will describe two sensor approaches based on surface-plasmon resonance and mechanical resonators that have recently provided new characterization features for biological samples, although technological limitations for use in high-throughput applications still exist.
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Affiliation(s)
- Mario M. Modena
- ETH Zürich, Department of Biosystems Science and Engineering,
Bio Engineering Laboratory, Basel, Switzerland
| | - Ketki Chawla
- ETH Zürich, Department of Biosystems Science and Engineering,
Bio Engineering Laboratory, Basel, Switzerland
| | - Patrick M. Misun
- ETH Zürich, Department of Biosystems Science and Engineering,
Bio Engineering Laboratory, Basel, Switzerland
| | - Andreas Hierlemann
- ETH Zürich, Department of Biosystems Science and Engineering,
Bio Engineering Laboratory, Basel, Switzerland
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Kwon H, Malik WQ, Rutkove SB, Sanchez B. Separation of Subcutaneous Fat From Muscle in Surface Electrical Impedance Myography Measurements Using Model Component Analysis. IEEE Trans Biomed Eng 2018; 66:354-364. [PMID: 29993468 DOI: 10.1109/tbme.2018.2839977] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE Electrical impedance myography (EIM) is a relatively new technique to assess neuromuscular disorders (NMD). Although the application of EIM using surface electrodes (sEIM) has been adopted by the neurology community in recent years to evaluate NMD status, sEIM's sensitivity as a biomarker of skeletal muscle condition is impacted by subcutaneous fat (SF) tissue. Here, we develop a method that is able to remove the contribution of SF from sEIM data. METHODS We evaluate independent component analysis (ICA) and principal component analysis (PCA) for this purpose. Then, we introduce the so-called model component analysis (MCA). All methods are validated with numerical simulations using impedivity data from SF and muscle tissues. The methods are then tested with measurements performed in diseased individuals ( n=3). RESULTS Simulations demonstrate that MCA is the most accurate method at separating the impedivity of SF and muscle tissues with the accuracy being 99.2%, followed by ICA with 51.4%, and finally PCA with 38.5%. Experimental results from sEIM data measured on the triceps brachii of patients are consistent with muscle grayscale level values obtained using ultrasound imaging. CONCLUSION MCA can be used to separate the impedivity of SF and muscle tissues from sEIM data, thus increasing the sensitivity to detect changes in the muscle. SIGNIFICANCE MCA can make the sEIM technique a better diagnostic tool and biomarker of disease progression and response to therapy by removing the confounding effect of SF tissue in NMD patients with excess subcutaneous fat tissue for any reason.
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Ray A, Gräter F, Thukral L. Probing molecular forces in multi-component physiological membranes. Phys Chem Chem Phys 2018; 20:2155-2161. [PMID: 29177331 DOI: 10.1039/c7cp05981g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Biological membranes are remarkably heterogeneous, composed of diverse lipid mixtures with distinct chemical structure and composition. By combining molecular dynamics simulations and the newly developed Lipid-Force Distribution Analysis (L-FDA), we explore force transmission in complex multi-component membrane models mimicking eukaryotic organelles. We found that the chemical-moiety based segmentation at membrane interfaces revealed a distinctive distribution of bonded and non-bonded forces in diverse membrane environment. Our molecular stress analysis could have far-reaching implications in describing the relationship between membrane mechanical properties and functional states of chemically distinct lipids.
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Affiliation(s)
- Arjun Ray
- CSIR-Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, 110025, India.
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Amini M, Hisdal J, Kalvøy H. Applications of Bioimpedance Measurement Techniques in Tissue Engineering. JOURNAL OF ELECTRICAL BIOIMPEDANCE 2018; 9:142-158. [PMID: 33584930 PMCID: PMC7852004 DOI: 10.2478/joeb-2018-0019] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Indexed: 05/19/2023]
Abstract
Rapid development in the field of tissue engineering necessitates implementation of monitoring methods for evaluation of the viability and characteristics of the cell cultures in a real-time, non-invasive and non-destructive manner. Current monitoring techniques are mainly histological and require labeling and involve destructive tests to characterize cell cultures. Bioimpedance measurement technique which benefits from measurement of electrical properties of the biological tissues, offers a non-invasive, label-free and real-time solution for monitoring tissue engineered constructs. This review outlines the fundamentals of bioimpedance, as well as electrical properties of the biological tissues, different types of cell culture constructs and possible electrode configuration set ups for performing bioimpedance measurements on these cell cultures. In addition, various bioimpedance measurement techniques and their applications in the field of tissue engineering are discussed.
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Affiliation(s)
- M. Amini
- Department of Physics, University of Oslo, Oslo, Norway
| | - J. Hisdal
- Vascular Investigations and Circulation lab, Aker Hospital, Oslo University Hospital, Oslo, Norway
| | - H. Kalvøy
- Department of Clinical and Biomedical Engineering, Rikshospitalet, Oslo University Hospital, Oslo, Norway
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40
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Present Uses, Future Applications, and Technical Underpinnings of Electrical Impedance Myography. Curr Neurol Neurosci Rep 2017; 17:86. [DOI: 10.1007/s11910-017-0793-3] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Louarroudi E, Sanchez B. On the correct use of stepped-sine excitations for the measurement of time-varying bioimpedance. Physiol Meas 2016; 38:N73-N80. [PMID: 28005012 DOI: 10.1088/1361-6579/aa556d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE When a linear time-varying (LTV) bioimpedance is measured using stepped-sine excitations, a compromise must be made: the temporal distortions affecting the data depend on the experimental time, which in turn sets the data accuracy and limits the temporal bandwidth of the system that needs to be measured. APPROACH Here, the experimental time required to measure linear time-invariant bioimpedance with a specified accuracy is analyzed for different stepped-sine excitation setups. RESULTS We provide simple equations that allow the reader to know whether LTV bioimpedance can be measured through repeated time- invariant stepped-sine experiments. SIGNIFICANCE Bioimpedance technology is on the rise thanks to a plethora of healthcare monitoring applications. The results presented can help to avoid distortions in the data while measuring accurately non-stationary physiological phenomena. The impact of the work presented is broad, including the potential of enhancing bioimpedance studies and healthcare devices using bioimpedance technology.
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Affiliation(s)
- E Louarroudi
- Optical Metrology, 3D design and Mechanics (Op3Mech) Research Group, Faculty of Applied Engineering, University of Antwerp, 2020 Antwerp, Belgium
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Haandbæk N, Bürgel SC, Rudolf F, Heer F, Hierlemann A. Characterization of Single Yeast Cell Phenotypes Using Microfluidic Impedance Cytometry and Optical Imaging. ACS Sens 2016. [DOI: 10.1021/acssensors.6b00286] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Niels Haandbæk
- Department
of Biosystems Science and Engineering, ETH Zurich, 4058, Basel, Switzerland
| | - Sebastian C. Bürgel
- Department
of Biosystems Science and Engineering, ETH Zurich, 4058, Basel, Switzerland
| | - Fabian Rudolf
- Department
of Biosystems Science and Engineering, ETH Zurich, 4058, Basel, Switzerland
| | - Flavio Heer
- Zurich Instruments AG, Technoparkstrasse
1, 8005, Zurich, Switzerland
| | - Andreas Hierlemann
- Department
of Biosystems Science and Engineering, ETH Zurich, 4058, Basel, Switzerland
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Hernández-Balaguera E, López-Dolado E, Polo JL. Obtaining electrical equivalent circuits of biological tissues using the current interruption method, circuit theory and fractional calculus. RSC Adv 2016. [DOI: 10.1039/c5ra24535d] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The current interruption method allows a real-time estimation of the physiological state of tissues from their electrical properties.
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Affiliation(s)
- E. Hernández-Balaguera
- Escuela de Ingeniería Industrial de Toledo
- Universidad de Castilla-La Mancha
- 45071 Toledo
- Spain
| | | | - J. L. Polo
- Escuela de Ingeniería Industrial de Toledo
- Universidad de Castilla-La Mancha
- 45071 Toledo
- Spain
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Sanchez B, Li J, Yim S, Pacheck A, Widrick JJ, Rutkove SB. Evaluation of Electrical Impedance as a Biomarker of Myostatin Inhibition in Wild Type and Muscular Dystrophy Mice. PLoS One 2015; 10:e0140521. [PMID: 26485280 PMCID: PMC4618134 DOI: 10.1371/journal.pone.0140521] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Accepted: 09/28/2015] [Indexed: 12/14/2022] Open
Abstract
Objectives Non-invasive and effort independent biomarkers are needed to better assess the effects of drug therapy on healthy muscle and that affected by muscular dystrophy (mdx). Here we evaluated the use of multi-frequency electrical impedance for this purpose with comparison to force and histological parameters. Methods Eight wild-type (wt) and 10 mdx mice were treated weekly with RAP-031 activin type IIB receptor at a dose of 10 mg kg−1 twice weekly for 16 weeks; the investigators were blinded to treatment and disease status. At the completion of treatment, impedance measurements, in situ force measurements, and histology analyses were performed. Results As compared to untreated animals, RAP-031 wt and mdx treated mice had greater body mass (18% and 17%, p < 0.001 respectively) and muscle mass (25% p < 0.05 and 22% p < 0.001, respectively). The Cole impedance parameters in treated wt mice, showed a 24% lower central frequency (p < 0.05) and 19% higher resistance ratio (p < 0.05); no significant differences were observed in the mdx mice. These differences were consistent with those seen in maximum isometric force, which was greater in the wt animals (p < 0.05 at > 70 Hz), but not in the mdx animals. In contrast, maximum force normalized by muscle mass was unchanged in the wt animals and lower in the mdx animals by 21% (p < 0.01). Similarly, myofiber size was only non-significantly higher in treated versus untreated animals (8% p = 0.44 and 12% p = 0.31 for wt and mdx animals, respectively). Conclusions Our findings demonstrate electrical impedance of muscle reproduce the functional and histological changes associated with myostatin pathway inhibition and do not reflect differences in muscle size or volume. This technique deserves further study in both animal and human therapeutic trials.
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Affiliation(s)
- Benjamin Sanchez
- Department of Neurology, Division of Neuromuscular Diseases, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215-5491, United States of America
- * E-mail:
| | - Jia Li
- Department of Neurology, Division of Neuromuscular Diseases, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215-5491, United States of America
| | - Sung Yim
- Department of Neurology, Division of Neuromuscular Diseases, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215-5491, United States of America
| | - Adam Pacheck
- Department of Neurology, Division of Neuromuscular Diseases, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215-5491, United States of America
| | - Jeffrey J. Widrick
- Division of Genetics and Genomics, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02215-5491, United States of America
| | - Seward B. Rutkove
- Department of Neurology, Division of Neuromuscular Diseases, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215-5491, United States of America
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García-Sánchez T, Azan A, Leray I, Rosell-Ferrer J, Bragós R, Mir LLM. Interpulse multifrequency electrical impedance measurements during electroporation of adherent differentiated myotubes. Bioelectrochemistry 2015; 105:123-35. [DOI: 10.1016/j.bioelechem.2015.05.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 05/25/2015] [Accepted: 05/31/2015] [Indexed: 01/26/2023]
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Stubbe M, Gimsa J. Maxwell's mixing equation revisited: characteristic impedance equations for ellipsoidal cells. Biophys J 2015; 109:194-208. [PMID: 26200856 PMCID: PMC4621811 DOI: 10.1016/j.bpj.2015.06.021] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Revised: 06/10/2015] [Accepted: 06/12/2015] [Indexed: 11/27/2022] Open
Abstract
We derived a series of, to our knowledge, new analytic expressions for the characteristic features of the impedance spectra of suspensions of homogeneous and single-shell spherical, spheroidal, and ellipsoidal objects, e.g., biological cells of the general ellipsoidal shape. In the derivation, we combined the Maxwell-Wagner mixing equation with our expression for the Clausius-Mossotti factor that had been originally derived to describe AC-electrokinetic effects such as dielectrophoresis, electrorotation, and electroorientation. The influential radius model was employed because it allows for a separation of the geometric and electric problems. For shelled objects, a special axial longitudinal element approach leads to a resistor-capacitor model, which can be used to simplify the mixing equation. Characteristic equations were derived for the plateau levels, peak heights, and characteristic frequencies of the impedance as well as the complex specific conductivities and permittivities of suspensions of axially and randomly oriented homogeneous and single-shell ellipsoidal objects. For membrane-covered spherical objects, most of the limiting cases are identical to-or improved with respect to-the known solutions given by researchers in the field. The characteristic equations were found to be quite precise (largest deviations typically <5% with respect to the full model) when tested with parameters relevant to biological cells. They can be used for the differentiation of orientation and the electric properties of cell suspensions or in the analysis of single cells in microfluidic systems.
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Affiliation(s)
- Marco Stubbe
- Chair of Biophysics, University of Rostock, Rostock, Germany
| | - Jan Gimsa
- Chair of Biophysics, University of Rostock, Rostock, Germany.
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Estrada-Leypon O, Moya A, Guimera A, Gabriel G, Agut M, Sanchez B, Borros S. Simultaneous monitoring of Staphylococcus aureus growth in a multi-parametric microfluidic platform using microscopy and impedance spectroscopy. Bioelectrochemistry 2015; 105:56-64. [PMID: 26004850 DOI: 10.1016/j.bioelechem.2015.05.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Revised: 04/22/2015] [Accepted: 05/04/2015] [Indexed: 11/30/2022]
Abstract
We describe the design, construction, and characterization of a scalable microfluidic platform that allows continuous monitoring of biofilm proliferation under shear stress conditions. Compared to other previous end-point assay studies, our platform offers the advantages of integration into multiple environments allowing simultaneous optical microscopy and impedance spectroscopy measurements. In this work we report a multi-parametric sensor that can monitor the growth and activity of a biofilm. This was possible by combining two interdigitated microelectrodes (IDuEs), and punctual electrodes to measure dissolved oxygen, K+, Na+ and pH. The IDuE has been optimized to permit sensitive and reliable impedance monitoring of Staphylococcus aureus V329 growth with two- and four-electrode measurements. We distinguished structural and morphological changes on intact cellular specimens using four-electrode data modeling. We also detected antibiotic mediated effects using impedance. Results were confirmed by scanning electrode microscopy and fluorescence microscopy after live/dead cell staining. The bacitracin mediated effects detected with impedance prove that the approach described can be used for guiding the development of novel anti-biofilm agents to better address bacterial infection.
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Affiliation(s)
- O Estrada-Leypon
- Grup d'Enginyeria de Materials (GEMAT), Institut Químic de Sarrià, Universitat Ramon Llull, Spain
| | - A Moya
- Instituto de Microelectrónica de Barcelona (IMB-CNM, CSIC), Bellaterra, Spain; Centro de Investigación Biomédica en Red, Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Zaragoza, Spain
| | - A Guimera
- Instituto de Microelectrónica de Barcelona (IMB-CNM, CSIC), Bellaterra, Spain; Centro de Investigación Biomédica en Red, Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Zaragoza, Spain
| | - G Gabriel
- Instituto de Microelectrónica de Barcelona (IMB-CNM, CSIC), Bellaterra, Spain; Centro de Investigación Biomédica en Red, Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Zaragoza, Spain
| | - M Agut
- Grup d'Enginyeria Molecular (GEM), Institut Químic de Sarrià, Universitat Ramon Llull, Spain
| | - B Sanchez
- Department of Neurology, Division of Neuromuscular Diseases, Beth Israel Deaconess Medical Center, 330 Brookline Avenue, Harvard Medical School, Boston, MA 02215-5491, USA
| | - S Borros
- Grup d'Enginyeria de Materials (GEMAT), Institut Químic de Sarrià, Universitat Ramon Llull, Spain.
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48
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Sanchez B, Louarroudi E, Pintelon R. Time-invariant measurement of time-varying bioimpedance using vector impedance analysis. Physiol Meas 2015; 36:595-620. [DOI: 10.1088/0967-3334/36/3/595] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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49
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Haandbæk N, With O, Bürgel SC, Heer F, Hierlemann A. Resonance-enhanced microfluidic impedance cytometer for detection of single bacteria. LAB ON A CHIP 2014; 14:3313-24. [PMID: 24984254 DOI: 10.1039/c4lc00576g] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
This paper reports on a novel impedance-based cytometer, which can detect and characterize sub-micrometer particles and cells passing through a microfluidic channel. The cytometer incorporates a resonator, which is constructed by means of a discrete inductor in series with the measurement electrodes in the microfluidic channel. The use of a resonator increases the sensitivity of the system in comparison to state-of-the-art devices. We demonstrate the functionality and sensitivity of the cytometer by discriminating E. coli and B. subtilis from beads of similar sizes by means of the resonance-enhanced phase shift of the current through the microfluidic channel. The phase shift can be correlated to size and dielectric properties of the measured objects.
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Affiliation(s)
- Niels Haandbæk
- ETH Zurich, Dept. of Biosystems Science and Engineering, Mattenstrasse 26, Basel, CH-4058, Switzerland.
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Silve A, Guimerà Brunet A, Al-Sakere B, Ivorra A, Mir L. Comparison of the effects of the repetition rate between microsecond and nanosecond pulses: Electropermeabilization-induced electro-desensitization? Biochim Biophys Acta Gen Subj 2014; 1840:2139-51. [DOI: 10.1016/j.bbagen.2014.02.011] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2013] [Revised: 01/24/2014] [Accepted: 02/13/2014] [Indexed: 10/25/2022]
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