BLOOD GLUCOSE MEASUREMENT USING GLUCOSE OXIDASE TEST STRIPS AND A COLOUR REFLECTANCE METER

1972 ◽  
Vol 2 (12) ◽  
pp. 660-661 ◽  
Author(s):  
A. Grauaug ◽  
A. Masters
Sensors ◽  
2019 ◽  
Vol 19 (6) ◽  
pp. 1448 ◽  
Author(s):  
Ming-Jie Lin ◽  
Ching-Chou Wu ◽  
Ko-Shing Chang

Second-generation glucose biosensors are presently the mainstream commercial solution for blood glucose measurement of diabetic patients. Screen-printed carbon electrodes (SPCEs) are the most-used substrate for glucose testing strips. This study adopted hydrophilic and positively charged α-poly-l-lysine (αPLL) as the entrapment matrix for the immobilization of negatively charged glucose oxidase (GOx) and ferricyanide (FIC) on SPCEs to construct a disposable second-generation glucose biosensor. The αPLL modification is shown to facilitate the redox kinetics of FIC and ferrocyanide on the SPCEs. The SPCEs coated with 0.5 mM GOx, 99.5 mM FIC, and 5 mM αPLL had better sensitivity for glucose detection due to the appreciable effect of protonated αPLL on the promotion of electron transfer between GOx and FIC. Moreover, the SPCEs coated with 0.5 mM GOx, 99.5 mM FIC, and 5 mM αPLL were packaged as blood glucose testing strips for the measurement of glucose-containing human serum samples. The glucose testing strips had good linearity from 2.8 mM to 27.5 mM and a detection limit of 2.3 mM. Moreover, the 5 mM αPLL-based glucose testing strips had good long-term stability to maintain GOx activity in aging tests at 50 °C.


BMJ ◽  
1974 ◽  
Vol 3 (5927) ◽  
pp. 384-387 ◽  
Author(s):  
B. Schersten ◽  
C. Kuhl ◽  
A. Hollender ◽  
R. Ekman

2007 ◽  
Vol 581 (1) ◽  
pp. 7-12 ◽  
Author(s):  
Stefanie Woderer ◽  
Nadja Henninger ◽  
Claus-Dieter Garthe ◽  
Hans Martin Kloetzer ◽  
Martin Hajnsek ◽  
...  

Biotecnia ◽  
2018 ◽  
Vol 21 (1) ◽  
pp. 22-28 ◽  
Author(s):  
Ana Cristina Gallegos Aguilar ◽  
Julian Esparza Romero ◽  
Héctor Hiram Hernández Martínez ◽  
Rene Urquídez Romero ◽  
Antonio Rascón Careaga ◽  
...  

Los medidores de glucosa se utilizan para ayudar al profesional de la salud a monitorear y detectar alteraciones de la glucosa sanguínea (GS). El objetivo fue comparar la técnica de HemoCue (HC) versus glucosa oxidasa (GOx) para la medición de GS utilizando 368 mediciones de GS por ambos métodos. Se utilizaron gráficos de Bland & Altman, prueba de t-pareada y regresión lineal para su comparación. Se encontró concordancia entre los métodos en la mayoría de los niveles de glucosa, excepto a concentraciones de glucosa ≥ 6.993 mmol/L. El analizador de glucosa HC es bueno para su uso en estudios de campo ya que es técnicamente fácil y requiere muy poco mantenimiento; sin embargo, se recomienda tener especial cuidado con aquellas personas cuyos valores de glucosa están dentro del límite del diagnóstico de diabetes ya que, con el método HC, existe el riesgo de clasificar erróneamente a las personas que ya tienen diabetes como no diabéticas. Por lo tanto, dada la importancia de conocer los valores reales de los niveles de glucosa en este grupo de personas para un diagnóstico preciso, se recomienda considerar un análisis posterior con el método GOx para corroborar el resultado.


Author(s):  
Herbert Fink ◽  
Tim Maihöfer ◽  
Jeffrey Bender ◽  
Jochen Schulat

Abstract Blood glucose monitoring (BGM) is the most important part of diabetes management. In classical BGM, glucose measurement by test strips involves invasive finger pricking. We present results of a clinical study that focused on a non-invasive approach based on volatile organic compounds (VOCs) in exhaled breath. Main objective was the discovery of markers for prediction of blood glucose levels (BGL) in diabetic patients. Exhaled breath was measured repeatedly in 60 diabetic patients (30 type 1, 30 type 2) in fasting state and after a standardized meal. Proton Transfer Reaction Time of Flight Mass Spectrometry (PTR-ToF-MS) was used to sample breath every 15 minutes for a total of six hours. BGLs were tested in parallel via BGM test strips. VOC signals were plotted against glucose trends for each subject to identify correlations. Exhaled indole (a bacterial metabolite of tryptophan) showed significant mean correlation to BGL (with negative trend) and significant individual correlation in 36 patients. The type of diabetes did not affect this result. Additional experiments of one healthy male subject by ingestion of lactulose and 13C-labeled glucose (n=3) revealed that exhaled indole does not directly originate from food digestion by intestinal microbiota. As indole has been linked to human glucose metabolism, it might be a tentative marker in breath for non-invasive BGM. Clinical studies with greater diversity are required for confirmation of such results and further investigation of metabolic pathways.


1999 ◽  
Author(s):  
Airat K. Amerov ◽  
Kye Jin Jeon ◽  
Yoen-Joo Kim ◽  
Gilwon Yoon

2017 ◽  
Vol 16 (2) ◽  
pp. 59-64
Author(s):  
Kh. A. Kurdanov ◽  
A. D. Elbaev ◽  
A. D. Elbaeva ◽  
R. I. Elbaeva

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