The nocturnal enuresis is a pediatric disorder which causes involuntary voiding during sleep without any physical problems. Approximately 20\% of the 5-year-old population have suffered from this disorder . This disorder negatively affects both the children and their parents in terms of psychology, behavior, and even finance . Further, the nocturnal enuresis has become a more serious problem, since number of children who participate in social activities like group camping is gradually increasing.
Common methods for managing the nocturnal enuresis are training the bladder, taking the desmopressin, and using the enuresis alarm. Overall, the conventional therapies differ in the cure rate and impractically manage pain and burdens of patients and their parents [3 ~ 6]. In addition, they cannot prevent the enuresis occurrence. On the other hand, estimating the enuretic moment in advance can be utilized to prevent the occurrence at high cure rate. Further, this approach minimizes pharmacological and behavioral interventions and reduces burdens of family. Unfortunately there have been few approaches to estimate the enuresis before it happens.
Nocturnal enuresis estimation based on physiological data
We have comprehensively investigated various physiological signals and symptoms related to the nocturnal enuresis [7 ~ 10]. Based on the in-depth study, we have reached four hypotheses to estimate the enuresis occurrence, regarding bladder urinary volume, heart rate, sleep stage, and periodic limb movement in sleep (PLMS).
Figure 1 : Interesting hypotheses to estimate the enuretic incident based on physiological data
- H1 : Before the enuretic moment, the impedance values show a gradual decrease due to production of the urine
- H2 : The exceptional increase of the heart rate occurs between the moment of appearing the urinary sensation and the enuretic moment
- H3: The enuretic incident happens after the sleep stage transition from one to closer to the arousal state.
- H4: PLMS(periodic limb movement in sleep) strongly correlates with the nocturnal enuresis
In order to demonstrate hypotheses in both accurate and convenient manner, we have been designing and developing a belt-type device ABDOMEN of multi-modal signals based on Samsung bioprocessor. ABDOMEN represents Advanced Bioprocessor-based Device Of Multi-modal ENsemble signals. Seungchul Shin is the main researcher for designing and implementing ABDOMEN. This is ongoing work and we are preparing several papers for challenging venues regarding this research. Based on our study, we expect a machine learning-based estimation system to prevent the enuresis occurrence shown in Figure 2.
Figure 2 : Structural framework of machine learning-based study for the nocturnal enuresis
For this project, our group is collaborating with urology and electrical engineering departments. Our work will finish the comprehensive framework for the promising estimation of the enuretic moment. The complete framework can help collect the interesting physiological signals during sleep, demonstrate the hypotheses and their relations to the nocturnal enuresis, and estimate when the enuretic incident occurs in advance. Finally, the estimation using the proposed framework will contribute to solve the nocturnal enuresis problem.
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-  Robert A Pretlow. Treatment of nocturnal enuresis with an ultrasound bladder volume controlled alarm device. The Journal of Urology, 1999.
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-  Rihui Li et al. Preliminary study of assessing bladder urinary volume using electrical impedance tomography. Journal of Medical and Biological Engineering, 2016.
-  Anne Kruse et al. Increased nocturnal blood pressure in enuretic children with polyuria. The Journal of Urology, 2009.
-  A Kawauchi et al. Changes in the structure of sleep spindles and delta waves on electroencephalography in patients with nocturnal enuresis. British Journal of Urology, 1998.
-  KARLIEN Dhondt et al. Sleep fragmentation and increased periodic limb movements are more common in children with nocturnal enuresis. Acta Paediatrica, 2014.
- Sangyeop Lee, Junhyung Moon, Taeho Lee, Saewon Kye, Seung-chul Shin, Kyoungwoo Lee, “Sleep Stage Classification for Managing Nocturnal Enuresis through Effective Configuration “, 2017 IEEE International Conference on Systems, Man, and Cybernetics (SMC) (Accepted)
- Saewon Kye, Junhyung Moon, Seung-chul Shin, Sangyeop Lee, Taeho Lee, Kyoungwoo Lee, “Detecting Periodic Limb Movements in Sleep using Motion Sensor Embedded Wearable Band”, 2017 IEEE International Conference on Systems, Man, and Cybernetics (SMC) (Accepted)
- Seung-chul Shine, Junhyung Moon, Saewon Kye, Kyoungwoo Lee, Yong Seung Lee, Hong-Goo Kang, “Continuous Bladder Volume Monitoring System for Wearable Applications”, IEEE 39th Annual International Conference of the Engineering in Medicine and Biology Society (EMBC) (Accepted)
- Junhyung Moon, Sangyeop Lee, Taeho Lee, Saewon Kye, Yong Seung Lee, Seung-chul Shine, Kyoungwoo Lee, “A Prospective Study of Examining Physiological Signals for Estimating Occurrence of Nocturnal Enuresis”, IEEE 39th Annual International Conference of the Engineering in Medicine and Biology Society (EMBC) (Accepted)
- 정부부처: National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIP; Ministry of Science, ICT \& Future Planning)
- 과제번호: No.2017R1C1B5018075
- 과제명: Nocturnal Enuresis Predictions with Deep Learning on Multimodal Biometric Data
- 과제기간: 2017~2020년
- 총 액수: 약 1억5천만