2015/09/03 by Heungjae Choi, Jack A. Naylon, Steve Luzio +4 · 3 citations
Engineering · Biochemistry, Genetics and Molecular Biology · #Microwave and Dielectric Measurement Techniques #Spectroscopy Techniques in Biomedical and Chemical Research #Non-Invasive Vital Sign Monitoring
paper · doi:10.1109/tmtt.2015.2472019
openalex publication_date 2015/09/03 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
A design of a microwave noninvasive continuous blood glucose monitoring sensor and its interference test results are presented. The novelty of the proposed sensor is that it comprises two spatially separated split-ring resonators, where one interacts with the change in glucose level of a sample under test while the other ring is used as a reference. The reference ring has a slightly different resonant frequency and is desensitized to the sample owing to its location, thus allowing changes in temperature to be calibrated out. From an oral glucose tolerance test with two additional commercially available sensors (blood strip and continuous glucose monitor) in parallel, we obtained encouraging performance for our sensor comparable with those of the commercial sensors. The effects of endogenous interferents common to all subjects, i.e., common sugars, vitamins (ascorbic acid), and metabolites (uric acid) have also been investigated by using a large Franz cell assembly. From the interference test, it is shown that the change in sensor response is dominated by changes in glucose level for concentrations relevant to blood, and the effects of interferents are negligible in comparison.