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Investigation of Glucose Fluctuation by Continuous Glucose Monitoring (CGM) Using Smartphone

Hiroshi Bando^1,2iD*, Hidehisa Urasaki^1,2, Masahiro Bando^1
1Medical Research/Tokushima University, Tokushima, Japan
²Yoshinogawa Hospital, Tokushima, Japan

Corresponding Author: Hiroshi Bando ^{ORCID iD}
Address: Tokushima University /Medical Research, Nakashowa 1-61, Tokushima 770-0943, Japan.
Received date: 08 September 2025; Accepted date: 04 October 2025; Published date: 11 October 2025

Citation: Bando H, Urasaki H, Bando M. Investigation of Glucose Fluctuation by Continuous Glucose Monitoring (CGM) Using Smartphone. Asp Biomed Clin Case Rep. 2025 Oct 11;8(3):282-86.

Copyright © 2025 Bando H, Urasaki H, Bando M. This is an open-access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium provided the original work is properly cited.

Keywords: FreeStyle Libre 3, Smartphone, Continuous Glucose Monitoring, Post-Prandial Hyperglycemia, Pre-Prandial Milk

Abbreviations: CGM: Continuous Glucose Monitoring; PPH: Post-Prandial Hyperglycemia

Abstract

Using the medical apparatus FreeStyle Libre 3 with smartphone as Continuous Glucose Monitoring (CGM), detailed blood glucose variability was studied. Current case is a registered nurse aged 59 years who has been treated with some oral hypoglycemic agents (OHAs). Her diabetic state has been stable with HbA1c 6.6–6.9%. The purpose was to monitor the glucose fluctuation in response to various food intake. Post-prandial hyperglycemia (PPH) was observed by carbohydrate intake, such as rice, bread, and noodles. By drinking pre-prandial milk 70 cc just before 3 meals a day, PPH showed enough reduction, which suggests a clinically beneficial effect of milk from now.