|
1
|
Tajitsu Y, Shimda S, Nonomura T, Yanagimoto H, Nakamura S, Ueshima R, Kawanobe M, Nakiri T, Takarada J, Takeuchi O, Nisho R, Takeshita K, Takahashi M, Sugiyama K. Application of Braided Piezoelectric Poly-l-Lactic Acid Cord Sensor to Sleep Bruxism Detection System with Less Physical or Mental Stress. MICROMACHINES 2023; 15:86. [PMID: 38258205 PMCID: PMC10819301 DOI: 10.3390/mi15010086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 12/23/2023] [Accepted: 12/26/2023] [Indexed: 01/24/2024]
Abstract
For many years, we have been developing flexible sensors made of braided piezoelectric poly-l-lactic acid (PLLA) fibers that can be tied and untied for practical applications in society. To ensure good quality of sleep, the occurrence of bruxism has been attracting attention in recent years. Currently, there is a need for a system that can easily and accurately measure the frequency of bruxism at home. Therefore, taking advantage of the braided piezoelectric PLLA cord sensor's unique characteristic of being sewable, we aimed to provide a system that can measure the frequency of bruxism using the braided piezoelectric PLLA cord sensor simply sewn onto a bed sheet on which the subject lies down. After many tests using trial and error, the sheet sensor was completed with zigzag stitching. Twenty subjects slept overnight in a hospital room on sheets integrated with a braided piezoelectric PLLA cord. Polysomnography (PSG) was simultaneously performed on these subjects. The results showed that their bruxism could be detected with an accuracy of more than 95% compared with PSG measurements, which can only be performed in a hospital by a physician and are more burdensome for the subjects, with the subjects simply lying on the bed sheet with a braided piezoelectric PLLA cord sensor sewn into it.
Collapse
Affiliation(s)
- Yoshiro Tajitsu
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Osaka 564-8680, Japan; (H.Y.); (S.N.); (R.U.); (M.K.); (T.N.); (J.T.)
| | - Saki Shimda
- Nishikawa Co., Ltd., Chuo, Tokyo 103-0006, Japan; (S.S.); (T.N.)
| | - Takuto Nonomura
- Nishikawa Co., Ltd., Chuo, Tokyo 103-0006, Japan; (S.S.); (T.N.)
| | - Hiroki Yanagimoto
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Osaka 564-8680, Japan; (H.Y.); (S.N.); (R.U.); (M.K.); (T.N.); (J.T.)
| | - Shun Nakamura
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Osaka 564-8680, Japan; (H.Y.); (S.N.); (R.U.); (M.K.); (T.N.); (J.T.)
| | - Ryoma Ueshima
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Osaka 564-8680, Japan; (H.Y.); (S.N.); (R.U.); (M.K.); (T.N.); (J.T.)
| | - Miyu Kawanobe
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Osaka 564-8680, Japan; (H.Y.); (S.N.); (R.U.); (M.K.); (T.N.); (J.T.)
| | - Takuo Nakiri
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Osaka 564-8680, Japan; (H.Y.); (S.N.); (R.U.); (M.K.); (T.N.); (J.T.)
| | - Jun Takarada
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Osaka 564-8680, Japan; (H.Y.); (S.N.); (R.U.); (M.K.); (T.N.); (J.T.)
| | - Osamu Takeuchi
- Faculty of Foreign Language Studies, Kansai University, Osaka 564-8680, Japan;
| | - Rei Nisho
- Teijin Frontier Co., Ltd., Kita, Osaka 530-8605, Japan; (R.N.); (K.T.)
| | - Koji Takeshita
- Teijin Frontier Co., Ltd., Kita, Osaka 530-8605, Japan; (R.N.); (K.T.)
| | | | | |
Collapse
|