scholarly journals Microfluidic system for screening disease based on physical properties of blood

Bioimpacts ◽  
2019 ◽  
Vol 10 (3) ◽  
pp. 141-150
Author(s):  
Siddharth Singh Yadav ◽  
Basant Singh Sikarwar ◽  
Priya Ranjan ◽  
Rajiv Janardhanan
Keyword(s):  
Physical Properties ◽  
Large Scale ◽  
One Health ◽  
Point Of Care ◽  
Low Cost ◽  
Microfluidic System ◽  
Middle Income ◽  
Blood Samples ◽  
Resource Limited ◽  
Automated Classifier

Introduction: A key feature of the 'One Health' concept pertains to the design of novel point of care systems for largescale screening of health of the population residing in resource-limited areas of low- and middle-income countries with a view to obtaining data at a community level as a rationale to achieve better public health outcomes. The physical properties of blood are different for different samples. Our study involved the development of an innovative system architecture based upon the physical properties of blood using automated classifiers to enable large-scale screening of the health of the population living in resource-limited settings. Methods: The proposed system consisted of a simple, robust and low-cost sensor with capabilities to sense and measure even the minute changes in the physical properties of blood samples. In this system, the viscosity of blood was derived from a power-law model coupled with the Rabinowitsch-Mooney correction for non-Newtonian shear rates developed in a steady laminar Poiseuille flow. Surface tension was measured by solving the Young-Laplace equation for pendant drop shape hanging on a vertical needle. An anticipated outcome of this study would be the development of a novel automated classifier based upon the rheological attributes of blood. This automated classifier would have potential application in evaluating the health status of a population at regional and global levels. Results: The proposed system was used to measure the physical properties of various samples like normal, tuberculous and anemic blood samples. The results showed that the physical properties of these samples were different as compared to normal blood samples. The major advantage of this system was low-cost, as well as its simplicity and portability. Conclusion: In this work, we proposed making a case for the validation of a low-cost version of a microfluidic system capable of scanning large populations for a variety of diseases as per the WHO mandate of "One Health".

scholarly journals Whole Blood Immunoassay Based on Centrifugal Bead Sedimentation

2011 ◽  
Vol 57 (5) ◽  
pp. 753-761 ◽  
Author(s):  
Ulrich Y Schaff ◽  
Greg J Sommer
Keyword(s):  
Whole Blood ◽  
Single Channel ◽  
Limit Of Detection ◽  
Point Of Care ◽  
Low Cost ◽  
Microfluidic System ◽  
Blood Samples ◽  
Reactive Protein ◽  
Immunoassay Technique ◽  
Microfluidic Immunoassay

BACKGROUND Centrifugal “lab on a disk” microfluidics is a promising avenue for developing portable, low-cost, automated immunoassays. However, the necessity of incorporating multiple wash steps results in complicated designs that increase the time and sample/reagent volumes needed to run assays and raises the probability of errors. We present proof of principle for a disk-based microfluidic immunoassay technique that processes blood samples without conventional wash steps. METHODS Microfluidic disks were fabricated from layers of patterned, double-sided tape and polymer sheets. Sample was mixed on-disk with assay capture beads and labeling antibodies. Following incubation, the assay beads were physically separated from the blood cells, plasma, and unbound label by centrifugation through a density medium. A signal-laden pellet formed at the periphery of the disk was analyzed to quantify concentration of the target analyte. RESULTS To demonstrate this technique, the inflammation biomarkers C-reactive protein and interleukin-6 were measured from spiked mouse plasma and human whole blood samples. On-disk processing (mixing, labeling, and separation) facilitated direct assays on 1-μL samples with a 15-min sample-to-answer time, <100 pmol/L limit of detection, and 10% CV. We also used a unique single-channel multiplexing technique based on the sedimentation rate of different size or density bead populations. CONCLUSIONS This portable microfluidic system is a promising method for rapid, inexpensive, and automated detection of multiple analytes directly from a drop of blood in a point-of-care setting.

scholarly journals Design and Experimental Investigation of a Novel Spiral Microfluidic Chip to Separate Wide Size Range of Micro-Particles Aimed at Cell Separation

2021 ◽  
Author(s):  
Seyed Ali Tabatabaei ◽  
Mohammad Zabetian targhi
Keyword(s):  
Cell Separation ◽  
Point Of Care ◽  
Low Cost ◽  
Diagnostic System ◽  
Average Diameter ◽  
Microfluidic System ◽  
Microfluidic Chips ◽  
Blood Samples ◽  
Micro Particles ◽  
User Friendly

Abstract BackgroundIsolation of microparticles and biological cells on microfluidic chips has received considerable attention due to their applications in numerous areas such as medical and engineering fields. Microparticles separation are of great importance in bioassays owing to the need for a smaller sample and device size, and lower manufacturing costs. In this study, we first explain the concepts of separation and microfluidic science along with their applications in the medical sciences, and then, a conceptual design of a novel inertial microfluidic system is proposed and analyzed. The PDMS spiral microfluidic device was fabricated, and its effects on the separation of particles with sizes similar to biological particles were experimentally analyzed. This separation technique can be used in the process of separating cancer cells from the normal ones in the blood samples.ResultsThese components required for testing were selected, assembled, and finally, a very affordable microfluidic kit was provided. Different experiments were designed, and the results were analyzed using appropriate software and methods. Separator system tests with polydisperse hollow glass particles (diameter 2-20 µm), and monodisperse Polystyrene particles (diameter 5,15 µm), and the results exhibit an acceptable chip performance with 86 percent of efficiency for both monodisperse particles and polydisperse particles. The microchannel collects particles with an average diameter of 15.8 μm, 9.4 μm, and 5.9 μm at the Proposed reservoirs. ConclusionThis chip can be integrated into a more extensive point-of-care diagnostic system to test blood samples, and it could be said Based on the results of the experiments, this low-cost and user-friendly setting can be used for a variety of microparticle separation programs such as cell separation in biological assays.

scholarly journals Validation of a point-of-care rapid diagnostic test for hepatitis C for use in resource-limited settings

2019 ◽  
Vol 11 (4) ◽  
pp. 314-315
Author(s):  
James S Leathers ◽  
Maria Belen Pisano ◽  
Viviana Re ◽  
Gertine van Oord ◽  
Amir Sultan ◽  
...  
Keyword(s):  
Point Of Care ◽  
Low Cost ◽  
Rapid Diagnosis ◽  
Direct Acting Antivirals ◽  
Resource Limited Settings ◽  
Rapid Diagnosis Test ◽  
Resource Limited ◽  
Specificity And Sensitivity ◽  
Hcv Screening ◽  
Direct Acting

Abstract Background Treatment of HCV with direct-acting antivirals has enabled the discussion of HCV eradication worldwide. Envisioning this aim requires implementation of mass screening in resource-limited areas, usually constrained by testing costs. Methods We validated a low-cost, rapid diagnosis test (RDT) for HCV in three different continents in 141 individuals. Results The HCV RDT showed 100% specificity and sensitivity across different samples regardless of genotype or viral load (in samples with such information, 90%). Conclusions The HCV test validated in this study can allow for HCV screening in areas of need when properly used.

Real-time Red Blood Cell Counting and Osmolarity Analysis using a Photoacoustic-based Microfluidic System

Lab on a Chip ◽  
2021 ◽  
Author(s):  
Wenxiu Zhao ◽  
Haibo Yu ◽  
Yangdong Wen ◽  
Hao Luo ◽  
Boliang Jia ◽  
...  
Keyword(s):  
Blood Cell ◽  
Physical Properties ◽  
Red Blood Cell ◽  
Blood Cells ◽  
Diagnostic Procedure ◽  
Microfluidic System ◽  
Cell Counting ◽  
Blood Samples ◽  
System P ◽  
Blood Cell Counting

Counting the number of red blood cells (RBCs) in blood samples is a common clinical diagnostic procedure, but conventional methods are unable to provide the size and other physical properties...

scholarly journals Design and experimental investigation of a novel spiral microfluidic chip to separate wide size range of micro-particles aimed at cell separation

2021 ◽  
pp. 095441192110297
Author(s):  
Seyed Ali Tabatabaei ◽  
Mohammad Zabetian Targhi
Keyword(s):  
Point Of Care ◽  
Diagnostic System ◽  
Average Diameter ◽  
Microfluidic System ◽  
Microfluidic Chips ◽  
Medical Sciences ◽  
Blood Samples ◽  
Micro Particles ◽  
Monodisperse Polystyrene ◽  
Device Size

Isolation of microparticles and biological cells on microfluidic chips has received considerable attention due to their applications in numerous areas such as medical and engineering fields. Microparticles separation is of great importance in bioassays due to the need for smaller sample and device size and lower manufacturing costs. In this study, we first explain the concepts of separation and microfluidic science along with their applications in the medical sciences, and then, a conceptual design of a novel inertial microfluidic system is proposed and analyzed. The PDMS spiral microfluidic device was fabricated, and its effects on the separation of particles with sizes similar to biological particles were experimentally analyzed. This separation technique can be used to separate cancer cells from the normal ones in the blood samples. These components required for testing were selected, assembled, and finally, a very affordable microfluidic kit was provided. Different experiments were designed, and the results were analyzed using appropriate software and methods. Separator system tests with polydisperse hollow glass particles (diameter 2–20 µm), and monodisperse Polystyrene particles (diameter 5 & 15 µm), and the results exhibit an acceptable chip performance with 86% of efficiency for both monodisperse particles and polydisperse particles. The microchannel collects particles with an average diameter of 15.8, 9.4, and 5.9 μm at the proposed reservoirs. This chip can be integrated into a more extensive point-of-care diagnostic system to test blood samples.

scholarly journals Investigating Capnography Innovation for Better Patient Monitoring in the Resource Limited Surgical Setting

2018 ◽  
Vol 26 (1) ◽  
pp. 124-128 ◽  
Author(s):  
Maziar M. Nourian ◽  
Patrick Kolbay ◽  
Soeren Hoehne ◽  
Ahrash E. Poursaid ◽  
Ann E. Rowley ◽  
...  
Keyword(s):  
In Silico ◽  
Low Cost ◽  
Sampling Rate ◽  
Middle Income ◽  
Resource Limited ◽  
Industry Standards ◽  
Environmental Sensor ◽  
Available Technology ◽  
Surgical Setting ◽  
Lung Simulation

Background. Access to basic anesthetic monitoring in the developing world is lacking, which contributes to the 100 times greater anesthesia-related mortality in low- and middle-income countries. We hypothesize that an environmental sensor with a lower sampling rate could provide some clinical utility by providing CO2 levels, respiratory rate, and support in detection of clinical abnormalities. Materials and Methods. A bench-top lung simulation was created to replicate CO2 waveforms, and an environmental sensor was compared with industry-available technology. Sensor response time and respiratory rates were compared between devices. Additionally, an in silico model was created to replicate capnography pathology as waveforms would appear using the environmental sensor. Results and Conclusion. Breath simulations using the bench-top lung simulation produced similar results to industry standards with a degree of variability. Respiratory rates did not differ between the environmental sensor and all other devices tested. Finally, pathological waveforms created in silico carried a certain level of detail regarding ventilatory pathology, which could provide some clinical insight to an anesthesiologist. We believe our prototype is the first step toward making low-cost and portable capnography available in the resource-limited setting, and future efforts should focus on bridging the gap to safer anesthesia and surgery globally.

scholarly journals Neonatal innovations in resource-limited settings

2021 ◽  
Vol 36 ◽  
pp. 82-86
Author(s):  
Neha Agarwal ◽  
Rakesh Kumar ◽  
Girish Gupta
Keyword(s):  
Health Care ◽  
Neonatal Mortality ◽  
Low Cost ◽  
Cost Effective ◽  
Middle Income ◽  
Development Goal ◽  
The Sustainable Development ◽  
Resource Limited ◽  
Care Technology ◽  
Year 2000

In the year 2000, Millennium Declaration was signed by the world leaders to reduce the under-5 mortality rate by two-thirds from the baseline figure in 1990. Millennium Development Goal 4 was replaced by the Sustainable Development Goal (SDG) in 2015. Reduction in the neonatal mortality, which accounts for majority of the deaths in children under the age of 5 years, was an imminent goal of SDG. Despite these initiatives, the current trends in neonatal mortality are far away from the expected targets. To curb the rate of neonatal mortality, the neonatal services are expanding in India at a rapid pace. To bridge the gap between the availability and accessibility to the health care technology between the developed and developing countries, the current focus is toward the development of low-cost and effective technological innovations in neonatal care and ensuring their patenting and effective publicity. This should facilitate the translation of innovations into mass production and availability for practice with significant effect in low- and middle-income countries. Generation of evidence will increase the acceptability of these innovations by demonstrating their benefit over the currently available technologies. Fortuitously, India has developed many innovations in the neonatal health care. However, majority of the neonatologists are still unaware of the existing technological solutions, and the ways to optimally utilize them. This review is, therefore, an attempt to recognize such low-cost, effective, and sustainable innovations done in the field of neonatology, over the past few decades.

scholarly journals Low cost Passive Monitoring of Nitrogen dioxide and Sulphur dioxide in ambient air

2012 ◽  
Vol 27 ◽  
pp. 34-45 ◽  
Author(s):  
R. M. Byanju ◽  
M. B. Gewali ◽  
K. Manandhar
Keyword(s):  
Nitrogen Dioxide ◽  
Sulphur Dioxide ◽  
Coefficient Of Variation ◽  
Large Scale ◽  
Low Cost ◽  
Ambient Air ◽  
Distilled Water ◽  
Passive Monitoring ◽  
Standard Methods ◽  
Resource Limited

Standard nitrogen dioxide (NO2) and sulphur dioxide (SO2) monitoring techniques require expensive instrumentation which is not easily adapted for large scale monitoring by resource limited countries. This paper presents the use of locally available relatively cheaper polyethylene tubes to be developed as passive diffusive sampler and use for monitoring of ambient nitrogen dioxide and sulphur dioxide using Triethanolamine (TEA) as absorbent. After extraction with double distilled water, modified Griese-Saltzmann method and West-Gaeke method were used for analysis of nitrite and sulphate adduct formed due to reaction of NO2 and SO2 respectively with TEA using spectrophotometer. The results are successfully compared with other standard methods. The detection limits and precision of the method as expressed as Coefficient of variation are good enough for monitoring of NO2 and SO2 in ambient air.DOI: http://dx.doi.org/10.3126/jncs.v27i1.6439 J. Nepal Chem. Soc., Vol. 27, 2011 34-45Uploaded date: 16 July, 2012

scholarly journals Industry 4.0 Technologies for the Manufacturing and Distribution of COVID-19 Vaccines

2022 ◽  
Vol 13 ◽  
pp. 215013192110686
Author(s):  
Azza Sarfraz ◽  
Zouina Sarfraz ◽  
Muzna Sarfraz ◽  
Aminah Abdul Razzack ◽  
Shehar Bano ◽  
...  
Keyword(s):  
Big Data ◽  
Value Chain ◽  
Disease Transmission ◽  
Industry 4.0 ◽  
Data Analytics ◽  
Large Scale ◽  
Process Development ◽  
Big Data Analytics ◽  
Middle Income ◽  
Resource Limited

Background The evolutionary stages of manufacturing have led us to conceptualize the use of Industry 4.0 for COVID-19 (coronavirus disease 2019), powered by Industry 4.0 technologies. Using applications of integrated process optimizations reliant on digitized data, we propose novel intelligent networks along the vaccine value chain. Vaccine 4.0 may enable maintenance processes, streamline logistics, and enable optimal production of COVID-19 vaccines. Vaccine 4.0 Framework The challenge in applying Vaccine 4.0 includes the requirement of large-scale technologies for digitally transforming manufacturing, producing, rolling-out, and distributing vaccines. With our framework, Vaccine 4.0 analytics will target process performance, process development, process stability, compliance, quality assessment, and optimized maintenance. The benefits of digitization during and post the COVID-19 pandemic include first, the continual assurance of process control, and second, the efficacy of big-data analytics in streamlining set parameter limits. Digitization including big data-analytics may potentially improve the quality of large-scale vaccine production, profitability, and manufacturing processes. The path to Vaccine 4.0 will enhance vaccine quality, improve efficacy, and compliance with data-regulated requirements. Discussion Fiscal and logistical barriers are prevalent across resource-limited countries worldwide. The Vaccine 4.0 framework accounts for expected barriers of manufacturing and equitably distributing COVID-19 vaccines. With amalgamating big data analytics and biometrics, we enable the identification of vulnerable populations who are at higher risk of disease transmission. Artificial intelligence powered sensors and robotics support thermostable vaccine distribution in limited capacity regions, globally. Biosensors isolate COVID-19 vaccinations with low or limited efficacy. Finally, Vaccine 4.0 blockchain systems address low- and middle-income countries with limited distribution capacities. Conclusion Vaccine 4.0 is a viable framework to optimize manufacturing of vaccines during and post the COVID-19 pandemic.

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