Browsing by Author "Ou, Chien-Zhi"

Now showing 1 - 2 of 2

Wireless and Wearable Monitoring Device for Dysphagia Evaluation
(2015)
Chou, Willy
;
Ou, Chien-Zhi
;
Lin, Bor-Shyh
;
Ko, Mei-Ju
;
Hu, Shao-Pu
Dysphagia is a common complication of strokes, and the patients usually have clinical problems such as malnutrition, significant weight loss, and aspiration pneumonia. Measuring the muscle activity pattern to describe physiology of swallowing behavior by surface electromyography (sEMG) is a simple, non-radioactive, and non-invasive method. Most of previous studies described the swallowing behavior by the terms of amplitude and duration. However, there is no objective and precise approach to evaluate swallowing coordination. For more precisely evaluate swallowing coordination of dysphagia, a wireless and wearable monitoring device was designed to measure four muscle groups simultaneously under swallowing. In this study, the algorithm of bilateral muscle pattern detecting was also developed to extract and analysis the difference swallowing feature of sEMG patterns. The experimental result shows that the amplitude and latency variation for dysphagic patients are significantly larger than those for healthy subjects under different swallowing conditions.
Wireless surface electromyography monitoring system for dysphagia evaluation
(2014-01-01)
Cheng, Chih-Jen
;
Yang, Zu-Po
;
Ou, Chien-Zhi
;
Lin, Bor-Shyh
;
光電系統研究所
Swallowing difficulty is also called dysphagia. It is usually a sign related to the problems of your throat or esophagus the muscular tube that moves food and liquids from the back of your mouth to your stomach. These diseases are the common problem in people who have problems of the brain or nervous system. Surface electromyography (sEMG) signals provide the valuable information about the changes in the muscle when measuring and analyzing localized muscle fatigue. Several previous studies have reported swallowing behavior by sEMG. But there are no objective methods to assess swallowing coordination. In previous studies, the sEMG system was usually bulk, and it caused inconvenience to the users. So, this study proposed the wireless surface electromyography monitoring system for dysphagia evaluation. In order to assess the more accurate coordination of activities, the cross-correlation coefficient was used to determine the correlation between the sEMG of different muscle groups. The experimental results show that the discoordination indexes for dysphagia patients are obviously greater than that of healthy subjects.