Cited by 76Diabetes Management and ResearchElectrochemical sensors and biosensorsPancreatic function and diabetes

Calibration of a subcutaneous amperometric glucose sensor implanted for 7 days in diabetic patients

Choleau, C., Klein, J.C., Reach, G., Aussedat, B., Demaria-Pesce, V., Wilson, G.S., Gifford, R., Ward, W.K.·2002·Biosensors and Bioelectronics

Abstract

Unlabelled Calibration, i.e. the transformation in real time of the signal I(t) generated by the glucose sensor at time t into an estimation of glucose concentration G(t), represents a key issue for the development of a continuous glucose monitoring system.Objective To compare two calibration procedures. In the one-point calibration, which assumes that I(o) is negligible, S is simply determined as the ratio I/G, and G(t) = I(t)/S. The two-point calibration consists in the determination of a sensor sensitivity S and of a background current I(o) by plotting two values of the sensor signal versus the concomitant blood glucose concentrations. The subsequent estimation of G(t) is given by G(t) = (I(t)-I(o))/S.Research design and methods A glucose sensor was implanted in the abdominal subcutaneous tissue of nine type 1 diabetic patients during 3 (n = 2) and 7 days (n = 7). The one-point calibration was performed a posteriori either once per day before breakfast, or twice per day before breakfast and dinner, or three times per day before each meal. The two-point calibration was performed each morning during breakfast.Results The percentages of points present in zones A and B of the Clarke Error Grid were significantly higher when the system was calibrated using the one-point calibration. Use of two one-point calibrations per day before meals was virtually as accurate as three one-point calibrations.Conclusion This study demonstrates the feasibility of a simple method for calibrating a continuous glucose monitoring system.

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Crossref · 10.1016/s0956-5663(01)00304-9

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  • The lag time between blood and subcutaneous tissue glucose concentrations causes further inaccuracies for CGM devices.

    “The lag time between blood and subcutaneous tissue glucose concentrations cause further inaccuracies for CGM devices.79–80”

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Authors
Choleau, C., Klein, J. C., Reach, G., Aussedat, B., Demaria-Pesce, V., Wilson, G. S., Gifford, R., & Ward, W. K.
Affiliations
  • Inserm (FR)
  • Centre de Morphologie Mathématique - CMM (FR)
  • University of Kansas (US)
Corresponding author
Reach, G.
Venue
Biosensors and Bioelectronics
Publisher
Elsevier BV
Published
2002-08
Volume
17
Issue
8
Pages
647-654
ISSN
0956-5663 (ISSN-L)
OpenAlex
W2191369865
Cited by
76
References
18
Citations by year
2025: 1 · 2024: 1 · 2023: 1 · 2022: 2 · 2021: 1 · 2020: 1 · 2019: 5 · 2018: 2 · 2017: 1 · 2016: 2 · 2015: 6 · 2014: 7 · 2013: 7 · 2012: 6
FWCI
2.12
Type
journal article
Language
en
Open access
closed
Locations
  • Biosensors and Bioelectronics (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r01dk030718-12, 5r01dk055297-03)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK55297, DK-30718)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Research
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Electrochemical sensors and biosensors
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
Keywords
continuous glucose monitoring, one-point calibration, two-point calibration, sensor sensitivity, background current, Clarke error grid, type 1 diabetes, sensor accuracy
MeSH terms
Blood Glucose, Diabetes Mellitus, Type 1, Humans, Blood Glucose Self-Monitoring, Biosensing Techniques, Prostheses and Implants

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