scholarly journals A Point-of-Care Paper-based Fingerstick Transaminase Test: Toward Low-cost “Lab-on-a-Chip” Technology for the Developing World

2013 ◽  
Vol 11 (5) ◽  
pp. 478-482 ◽  
Author(s):  
Nira R. Pollock ◽  
Donn Colby ◽  
Jason P. Rolland
Blood ◽  
2012 ◽  
Vol 119 (8) ◽  
pp. 1922-1928 ◽  
Author(s):  
Andrew M. Prentice ◽  
Conor P. Doherty ◽  
Steven A. Abrams ◽  
Sharon E. Cox ◽  
Sarah H. Atkinson ◽  
...  

AbstractIron supplementation strategies in the developing world remain controversial because of fears of exacerbating prevalent infectious diseases. Understanding the conditions in which iron will be absorbed and incorporated into erythrocytes is therefore important. We studied Gambian children with either postmalarial or nonmalarial anemia, who were given oral iron supplements daily for 30 days. Supplements administered on days 1 and 15 contained the stable iron isotopes 57Fe and 58Fe, respectively, and erythrocyte incorporation was measured in blood samples drawn 14 days later. We investigated how the iron-regulatory hormone hepcidin and other inflammatory/iron-related indices, all measured on the day of isotope administration, correlated with erythrocyte iron incorporation. In univariate analyses, hepcidin, ferritin, C-reactive protein, and soluble transferrin receptor (sTfR) strongly predicted incorporation of 57Fe given on day 1, while hepcidin, ferritin, and sTfR/log ferritin correlated with 58Fe incorporation. In a final multivariate model, the most consistent predictor of erythrocyte isotope incorporation was hepcidin. We conclude that under conditions of competing signals (anemia, iron deficiency, and infection), hepcidin powerfully controls use of dietary iron. We suggest that low-cost point-of-care hepcidin assays would aid iron supplementation programs in the developing world.


2018 ◽  
Vol 10 (25) ◽  
pp. 3066-3073 ◽  
Author(s):  
D. Martens ◽  
P. Ramirez-Priego ◽  
M. S. Murib ◽  
A. A. Elamin ◽  
A. B. Gonzalez-Guerrero ◽  
...  

We present a low-cost integrated nanophotonic lab-on-a-chip platform suitable for point-of-care (POC) biomarker analysis.


2021 ◽  
Vol 6 (Spring 2021) ◽  
Author(s):  
Sienna Dugan ◽  
Gabrielle J. Gonzales ◽  
Kelly Little

With the recent launch of the Global Development Lab in the Hunter and Stephanie Hunt Institute for Engineering and Humanity, fellows, faculty, and industry professionals have been working to create meaningful solutions to promote a resilient humanity, addressing the UN’s Sustainable Development Goals and challenges. The Institute has taken on Dr. Ali Beskok’s project, the development of a low cost, portable, Point-of-Care-Device for humanitarian and health applications. This paper provides a systematic review of current Point-of-Care-Devices using antibody antigen reactions. Additionally, it provides aspects of a market analysis and a literature review. Its overarching goal is to make recommendations regarding a disease the developing device could test for through antibody antigen reactions that would most positively affect global health. Traditionally, biomedical engineers have developed technologies in response to the needs of the developed world’s medical community. These approaches often do not address the needs of the majority of the world’s peoples afflicted with both communicable and non-communicable diseases as the developments are far too costly and those with most need have, at best, limited access to supporting clinical laboratory infrastructure in developing countries. A gap in care has emerged as a result of these conditions. As a result, Drs. Beskok and Koklu have developed a Lab-on-a-Chip technology that can test for a chosen disease with a turnaround time of just a few seconds and a detection limit of 1 ng of antigen per 1 mL of sample fluid. In contrast to other commonly used PoCD’s, this technology can be adapted for detection of various diseases in various settings. This is a great improvement to current devices on the market in specificity, sensitivity, and ease of use, therefore making it particularly useful in high-throughput, low-skill staffing environments. In creating disease selection criteria for Dr. Beskok and his team’s device, several factors were taken into consideration. Generally, the selection criteria consists of diseases that result in a high DALY value, are communicable, identifiable with antibody-antigen reactions, and can be tested for using urine. The diseases that were identified with this criterion were Tuberculosis and Malaria. Various antibody-antigen recommendations for diagnosis, advantages, and limitations of the proposed Point-of-Care-Device are discussed in the Proposed Disease section. In addition, current funding for each disease is overviewed. In order to make the greatest impact, deployment of the PoCD in the Sub-Saharan region, most specifically the Democratic Republic of Congo and Sierra Leone are recommended. Furthermore, children under the age of 5 who suffer from malnutrition should be given special attention. Focusing in these locations and populations will best aid in accomplishing the third Sustainable Development Goal set out by the UN: to ensure healthy lives and promote wellbeing for all at all ages.


Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3519 ◽  
Author(s):  
Enxiao Luan ◽  
Hossam Shoman ◽  
Daniel Ratner ◽  
Karen Cheung ◽  
Lukas Chrostowski

Thanks to advanced semiconductor microfabrication technology, chip-scale integration and miniaturization of lab-on-a-chip components, silicon-based optical biosensors have made significant progress for the purpose of point-of-care diagnosis. In this review, we provide an overview of the state-of-the-art in evanescent field biosensing technologies including interferometer, microcavity, photonic crystal, and Bragg grating waveguide-based sensors. Their sensing mechanisms and sensor performances, as well as real biomarkers for label-free detection, are exhibited and compared. We also review the development of chip-level integration for lab-on-a-chip photonic sensing platforms, which consist of the optical sensing device, flow delivery system, optical input and readout equipment. At last, some advanced system-level complementary metal-oxide semiconductor (CMOS) chip packaging examples are presented, indicating the commercialization potential for the low cost, high yield, portable biosensing platform leveraging CMOS processes.


Lab on a Chip ◽  
2012 ◽  
Vol 12 (1) ◽  
pp. 174-181 ◽  
Author(s):  
A. V. Govindarajan ◽  
S. Ramachandran ◽  
G. D. Vigil ◽  
P. Yager ◽  
K. F. Böhringer

Micromachines ◽  
2018 ◽  
Vol 9 (8) ◽  
pp. 403 ◽  
Author(s):  
Trieu Nguyen ◽  
Sune Zoëga Andreasen ◽  
Anders Wolff ◽  
Dang Duong Bang

Microcontrollers are programmable, integrated circuit chips. In the last two decades, their applications to industrial instruments, vehicles, and household appliances have reached the extent that microcontrollers are now the number-one selling electronic chip of all kinds. Simultaneously, the field of lab-on-a-chip research and technology has seen major technological leaps towards sample handling, sample preparation, and sensing for use in molecular diagnostic devices. Yet, the transformation from a laboratory based lab-on-a-chip technology to actual point-of-care device products has largely been limited to a fraction of the foreseen potential. We believe that increased knowledge of the vast possibilities that becomes available with open source microcontrollers, especially when embedded in easy-to-use development environments, such as the Arduino or Raspberry Pi, could potentially solve and even bridge the gap between lab-on-a-chip technology and real-life point of care applications. The profuse availability and extraordinary capabilities of microcontrollers, namely within computation, communication, and networking, combined with easy-to-use development environments, as well as a very active and fast moving community of makers, who are eager to share their knowledge, could potentially be the difference between a dreadful “chip-in-a-lab”-situation, and the next successful start-up. Here follows a brief insight into how open source microcontrollers could potentially have a transformative effect on the field of lab-on-a-chip research and technology. Details in some specific areas of application are briefly treated before addressing challenges and future perspectives.


Author(s):  
Enxiao Luan ◽  
Hossam Shoman ◽  
Daniel M. Ratner ◽  
Karen C. Cheung ◽  
Lukas Chrostowski

Thanks to advanced semiconductor microfabrication technology, chip-scale integration and miniaturization of lab-on-a-chip components, silicon-based optical biosensors have made significant progress for the purpose of point-of-care diagnosis. In this review, we provide an overview of the state-of-the-art in evanescent field biosensing technologies including interferometer, microcavity, photonic crystal, and Bragg grating waveguide-based sensors. Their sensing mechanisms and sensor performances, as well as real biomarkers for label-free detection, are exhibited and compared. We also review the development of chip-level integration for lab-on-a-chip photonic sensing platforms, which consist of the optical sensing device, flow delivery system, optical input and readout equipment. At last, some advanced system-level CMOS-chip packaging examples are presented, indicating the commercialization potential for the low cost, high yield, portable biosensing platform leveraging CMOS processes.


Author(s):  
Enxiao Luan ◽  
Hossam Shoman ◽  
Daniel M. Ratner ◽  
Karen C. Cheung ◽  
Lukas Chrostowski

Thanks to advanced semiconductor microfabrication technology, chip-scale integration and miniaturization of lab-on-a-chip components, silicon-based optical biosensors have made significant progress for the purpose of point-of-care diagnosis. In this review, we provide an overview of the state-of-the-art in evanescent field biosensing technologies including interferometer, microcavity, photonic crystal, and Bragg grating waveguide-based sensors. Their sensing mechanisms and sensor performances, as well as real biomarkers for label-free detection, are exhibited and compared. We also review the development of chip-level integration for lab-on-a-chip photonic sensing platforms, which consist of the optical sensing device, flow delivery system, optical input and readout equipment. At last, some advanced system-level CMOS-chip packaging examples are presented, indicating the commercialization potential for the low cost, high yield, portable biosensing platform leveraging CMOS processes.


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