Abstract

The ability to perform accurate continuous glucose monitoring without blood sampling has revolutionised the management of diabetes. Newer methods that can allow measurements during longer periods are necessary to substantially improve patients’ quality of life. This paper presents an alternative method for glucose monitoring which is based on electrical impedance spectroscopy. A battery-less implantable bioimpedance spectroscope was designed, built, and used in an in vivo study on pigs. After a recovery period of 14 days post surgery, a total of 236 subcutaneous bioimpedance measurements obtained from intravenous glucose tolerance tests, with glucose concentration ranges between 77.4 and 523.8 mg/dL, were analyzed. The results show that glucose concentrations estimated by subcutaneous bioimpedance measurements correlate very well to the blood glucose reference values. The pigs were clinically healthy throughout the study, and the postmortem examinations revealed no signs of adverse effects related to the sensor. The implantation of the sensor requires minor surgery. The implant, being externally powered, could in principle last indefinitely. These encouraging results demonstrate the potential of the bioimpedance method to be used in future continuous glucose monitoring systems.

Details

Title
A battery-less implantable glucose sensor based on electrical impedance spectroscopy
Author
Ollmar, Stig 1 ; Fernandez Schrunder, Alejandro 2 ; Birgersson, Ulrik 1 ; Kristoffersson, Tomas 3 ; Rusu, Ana 2 ; Thorsson, Elina 4 ; Hedenqvist, Patricia 5 ; Manell, Elin 5 ; Rydén, Anneli 5 ; Jensen-Waern, Marianne 5 ; Rodriguez, Saul 2 

 Karolinska Institute, Department of Clinical Science, Intervention and Technology, Stockholm, Sweden (GRID:grid.4714.6) (ISNI:0000 0004 1937 0626) 
 KTH Royal Institute of Technology, School of Electrical Engineering and Computer Science, Kista, Sweden (GRID:grid.5037.1) (ISNI:0000 0001 2158 1746) 
 Prevas AB, Stockholm, Sweden (GRID:grid.4714.6) 
 Swedish University of Agricultural Sciences, Pathology Unit, Department of Biomedical Science and Veterinary Public Health, Uppsala, Sweden (GRID:grid.6341.0) (ISNI:0000 0000 8578 2742) 
 Swedish University of Agricultural Sciences, Department of Clinical Sciences, Uppsala, Sweden (GRID:grid.6341.0) (ISNI:0000 0000 8578 2742) 
Pages
18122
Publication year
2023
Publication date
2023
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2880593792
Copyright
© The Author(s) 2023. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.