Evaluation of blood glucose concentration measurement using photoacoustic spectroscopy in near-infrared region
| Autor: | Takeshi Namita, Makoto Yamakawa, Kengo Kondo, Mitsuki Sato, Tsuyoshi Shiina |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Hydrophone Near-infrared spectroscopy 030209 endocrinology & metabolism 02 engineering and technology medicine.disease Signal Absorbance 03 medical and health sciences 020210 optoelectronics & photonics 0302 clinical medicine Diabetes mellitus Speed of sound 0202 electrical engineering electronic engineering information engineering medicine Photoacoustic spectroscopy Biomedical engineering Blood sampling |
| Zdroj: | Photons Plus Ultrasound: Imaging and Sensing 2017. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.2252532 |
| Popis: | Diabetes, a typical lifestyle-related disease, is an important disease presenting risks of various complications such as retinopathy, kidney failure, and nervous neuropathy. To treat diabetes, regular and continual self-measurement of blood glucose concentrations is necessary to maintain blood glucose levels and to prevent complications. Usually, daily measurements are taken using invasive methods such as finger-prick blood sampling. Some non-invasive optical techniques have been proposed to reduce pain and infection risk, however, few practical techniques exist today. To realize highly accurate and practical measurement of blood glucose concentrations, the feasibility of a photoacoustic method using near-infrared light was evaluated. A photoacoustic signal from a solution of glucose in water (+0–5 g/dl) or equine blood (+0–400 mg/dl) was measured using a hydrophone (9 mm diameter) at 800–1800 nm wavelengths. We investigated the relation between the glucose solution concentration and the photoacoustic signal intensity or peak position of the received photoacoustic signal (i.e. speed of sound in solutions). Results show that the signal intensity and sound speed of the glucose solution increase with increased glucose concentration for wavelengths at which light absorbance of glucose is high. For quantitative estimation of the glucose solution concentration, the photoacoustic signal intensity ratio between two wavelengths, at which dependence of the signal intensity on glucose concentration is high and low, was calculated. Results confirmed that the signal intensity ratios increase linearly with the glucose concentration. These analyses verified the feasibility of glucose level estimation using photoacoustic measurement in the near-infrared region. |
| Databáze: | OpenAIRE |
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