Accuracy of a flash glucose monitoring system in cats and determination of the time lag between blood glucose and interstitial glucose concentrations

Abstract Background The FreeStyle Libre (Abbott Laboratories) is a flash glucose monitoring system (FGMS) that measures interstitial glucose concentration (IG). The system is factory‐calibrated, easy to use, inexpensive, and could be useful for monitoring diabetic cats. Objectives To evaluate the an...

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Autores principales: Francesca Del Baldo, Federico Fracassi, Jully Pires, Antonio Maria Tardo, Eleonora Malerba, Elisa Manassero, Chen Gilor
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Publicado: Wiley 2021
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spelling oai:doaj.org-article:c0a7ac8d8c564810acbf31e6231a546b2021-11-30T17:01:03ZAccuracy of a flash glucose monitoring system in cats and determination of the time lag between blood glucose and interstitial glucose concentrations1939-16760891-664010.1111/jvim.16122https://doaj.org/article/c0a7ac8d8c564810acbf31e6231a546b2021-05-01T00:00:00Zhttps://doi.org/10.1111/jvim.16122https://doaj.org/toc/0891-6640https://doaj.org/toc/1939-1676Abstract Background The FreeStyle Libre (Abbott Laboratories) is a flash glucose monitoring system (FGMS) that measures interstitial glucose concentration (IG). The system is factory‐calibrated, easy to use, inexpensive, and could be useful for monitoring diabetic cats. Objectives To evaluate the analytical and clinical accuracy of the FGMS in cats and establish the lag‐time between IG and blood glucose concentration (BG). Animals Twenty client‐owned diabetic cats and 7 purpose‐bred healthy cats. Methods Prospective study. Blood glucose concentration was measured using a portable glucose meter validated for use in cats that served as a reference method for IG, as measured by FGMS. In diabetic cats, data were collected for sensor wearing time with different methods of application and accuracy across glycemic ranges. Accuracy was determined by fulfillment of ISO15197:2013 criteria. In healthy cats, lag‐time between IG and BG was established after IV administration of exogenous glucose. Results Good agreement between IG and BG was obtained (r = .93). Analytical accuracy was not achieved, whereas clinical accuracy was demonstrated with 100% of the results in zones A + B of the Parkes consensus error grid analysis. In the immediate 30 minutes after an IV bolus of glucose, when BG was increasing rapidly (approximately 2%/min), IG increased slowly, resulting in a difference of as much as 579 mg/dL, and no positive correlation between BG and IG was found. Conclusions and Clinical Importance The FGMS did not fulfill ISO requirements but is sufficiently accurate for glucose monitoring in cats, while considering the lag between IG and BG during periods of rapid changes in BG.Francesca Del BaldoFederico FracassiJully PiresAntonio Maria TardoEleonora MalerbaElisa ManasseroChen GilorWileyarticlecontinuous glucose monitoring systemdelaydiabetes mellitusFreeStyle LibreinsulinVeterinary medicineSF600-1100ENJournal of Veterinary Internal Medicine, Vol 35, Iss 3, Pp 1279-1287 (2021)
institution DOAJ
collection DOAJ
language EN
topic continuous glucose monitoring system
delay
diabetes mellitus
FreeStyle Libre
insulin
Veterinary medicine
SF600-1100
spellingShingle continuous glucose monitoring system
delay
diabetes mellitus
FreeStyle Libre
insulin
Veterinary medicine
SF600-1100
Francesca Del Baldo
Federico Fracassi
Jully Pires
Antonio Maria Tardo
Eleonora Malerba
Elisa Manassero
Chen Gilor
Accuracy of a flash glucose monitoring system in cats and determination of the time lag between blood glucose and interstitial glucose concentrations
description Abstract Background The FreeStyle Libre (Abbott Laboratories) is a flash glucose monitoring system (FGMS) that measures interstitial glucose concentration (IG). The system is factory‐calibrated, easy to use, inexpensive, and could be useful for monitoring diabetic cats. Objectives To evaluate the analytical and clinical accuracy of the FGMS in cats and establish the lag‐time between IG and blood glucose concentration (BG). Animals Twenty client‐owned diabetic cats and 7 purpose‐bred healthy cats. Methods Prospective study. Blood glucose concentration was measured using a portable glucose meter validated for use in cats that served as a reference method for IG, as measured by FGMS. In diabetic cats, data were collected for sensor wearing time with different methods of application and accuracy across glycemic ranges. Accuracy was determined by fulfillment of ISO15197:2013 criteria. In healthy cats, lag‐time between IG and BG was established after IV administration of exogenous glucose. Results Good agreement between IG and BG was obtained (r = .93). Analytical accuracy was not achieved, whereas clinical accuracy was demonstrated with 100% of the results in zones A + B of the Parkes consensus error grid analysis. In the immediate 30 minutes after an IV bolus of glucose, when BG was increasing rapidly (approximately 2%/min), IG increased slowly, resulting in a difference of as much as 579 mg/dL, and no positive correlation between BG and IG was found. Conclusions and Clinical Importance The FGMS did not fulfill ISO requirements but is sufficiently accurate for glucose monitoring in cats, while considering the lag between IG and BG during periods of rapid changes in BG.
format article
author Francesca Del Baldo
Federico Fracassi
Jully Pires
Antonio Maria Tardo
Eleonora Malerba
Elisa Manassero
Chen Gilor
author_facet Francesca Del Baldo
Federico Fracassi
Jully Pires
Antonio Maria Tardo
Eleonora Malerba
Elisa Manassero
Chen Gilor
author_sort Francesca Del Baldo
title Accuracy of a flash glucose monitoring system in cats and determination of the time lag between blood glucose and interstitial glucose concentrations
title_short Accuracy of a flash glucose monitoring system in cats and determination of the time lag between blood glucose and interstitial glucose concentrations
title_full Accuracy of a flash glucose monitoring system in cats and determination of the time lag between blood glucose and interstitial glucose concentrations
title_fullStr Accuracy of a flash glucose monitoring system in cats and determination of the time lag between blood glucose and interstitial glucose concentrations
title_full_unstemmed Accuracy of a flash glucose monitoring system in cats and determination of the time lag between blood glucose and interstitial glucose concentrations
title_sort accuracy of a flash glucose monitoring system in cats and determination of the time lag between blood glucose and interstitial glucose concentrations
publisher Wiley
publishDate 2021
url https://doaj.org/article/c0a7ac8d8c564810acbf31e6231a546b
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