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Wang, Chin-Man

doi:10.5405/jmbe.1582

Cited by 9 publications

(16 citation statements)

References 34 publications

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“…The piezoelectric sensor was placed on the midline of the anterior neck at the level of the thyroid cartilage, below its upper notch. 48 Nasal cannulae were placed in <0.001 ac † † P < 0.017 as statistical significance after Bonferroni correction. Data are presented as means ± standard deviations.…”

Section: Methodsmentioning

confidence: 99%

“…For better signal detection, a small hemispheric rubber ball (Rubber dome, Part # 9-1, 11.5*6 mm; Yuan Xiang Rubber, Taipei, Taiwan) was attached to the anterior neck skin surface, with Tegaderm Transparent Dressing (3 M Health Care, St. Paul, MN, USA) beneath the sensor. 48 women, mean ± SD age: 24.9 ± 3.1 years, age range 20-30 years), 38 participants in the middle-age group (18 men, 20 women, mean ± SD age: 40.9 ± 5.9 years, age range 31-50 years) and 39 participants in the old-age group (20 men, 19 women, mean ± age 59.6 ± 5.6 years, age range 51-70 years). The participants were recruited from the community in Taoyuan and Taipei counties, in northern Taiwan.…”

Section: Layout Of Piezoelectric Sensormentioning

confidence: 99%

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Aging‐related changes in swallowing, and in the coordination of swallowing and respiration determined by novel non‐invasive measurement techniques

Wang

Chen

Chuang

et al. 2014

Geriatrics Gerontology Int

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Aim:Previous studies have shown that the process of swallowing changes with aging, a phenomenon known as presbyphagia. These subtle and subclinical age-related changes make older adults more vulnerable to dysphagia during disease insults. However, there are limited studies of the swallowing process in older adults, because measurements are typically invasive or require exposure to X-rays. In the present study, we used integrated noninvasive measurements to determine aging-related changes of swallowing, and in the coordination of swallowing and respiration for a population of healthy participants. Methods:The non-invasive system provided measurements of larynx movement with piezoelectric sensors, submental muscle activity with surface electromyography and respiration-swallowing coordination by measurement of nasal airflow. We recruited 112 healthy participants from the community, 35 in a young-age group (age 20-30 years), 38 in a middle-age group (age 31-50 years) and 39 in an old-age group (age 51-70 years). Results:The oropharyngeal swallowing parameters of the old-age group had delayed onset latency and longer swallowing apnea duration relative to the other groups, and these differences were greater for larger boluses. The middle-and old-age groups had less expiratory-expiratory respiratory phase pattern than the young-age group. The probability of piecemeal deglutition was highest in the old-age group and lowest in the young-age group. These results show that the phases of oropharyngeal swallowing and the coordination of swallowing with respiration gradually change with aging. Conclusions:We used integrated non-invasive measurements to document age-related changes in swallowing, and in the coordination of swallowing and respiration in healthy adults. Geriatr Gerontol Int 2015; 15: 736-744.

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Section: Methodsmentioning

confidence: 99%

Section: Layout Of Piezoelectric Sensormentioning

confidence: 99%

Aging‐related changes in swallowing, and in the coordination of swallowing and respiration determined by novel non‐invasive measurement techniques

Wang

Chen

Chuang

et al. 2014

Geriatrics Gerontology Int

View full text Add to dashboard Cite

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“…Microphones have been placed in the neck area near the laryngopharynx for detecting the sound of swallowing by either a stretchy band or elastic structure [9, 10]. Wang et al [11] used a piezoelectric sensor mounted on the neck region to determine the best place for swallow detection. In one study [12], an electroglottograph sensor and a microphone were integrated into an elastic collar band tied to the neck.…”

Section: Introductionmentioning

confidence: 99%

Analyzing Breathing Signals and Swallow Sequence Locality for Solid Food Intake Monitoring

Dong

Biswas

2016

J. Med. Biol. Eng.

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Self-reported questionnaires are widely used by researchers for analyzing the dietary behavior of overweight and obese individuals. It has been established that questionnaire-based data collection often suffers from high errors due to its reporting subjectivity. Automatic swallow detection, as an alternative to questionnaires, is proposed in this paper to avoid such subjectivity. Existing approaches for swallow detection include the use of surface electromyography and sound to detect individual swallowing events. Many of these methods are generally too complicated and cumbersome for daily usage in a free-living setting. This paper presents a wearable solid food intake monitoring system that analyzes human breathing signals and swallow sequence locality. Food intake is identified by detecting swallow events. The system works based on a key observation that the otherwise continuous breathing process is interrupted by a short apnea during swallowing. A support vector machine (SVM) is first used for detecting such apneas in breathing signals collected from a wearable chest belt. The resulting swallow detection is then refined using a hidden Markov model (HMM)-based mechanism that leverages the known temporal locality in the sequence of human swallows. Temporal locality is based on the fact that people usually do not swallow in consecutive breathing cycles. The HMM model is used to model such temporal locality in order to refine the SVM results. Experiments were carried out on six healthy subjects wearing the proposed system. The proposed SVM method achieved up to 61% precision and 91% recall on average. Utilization of HMM in addition to SVM improved the overall performance to up to 75% precision and 86% recall.

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“…However, the results obtained are subjective, since they require investigator’s expertise for correct interpretation and allow the clinician to grade swallowing movements without a precise quantitative analysis. In medical device-based clinical practice, two techniques are the gold standard for the evaluation of swallowing, videofluorography swallowing study (VFSS) ,, and fiberoptic endoscopy evaluation of swallowing (FEES), , but they have critical drawbacks. VFSS encompasses significant radiation exposure, while the ingestion of a barium bolus can be dangerous for a patient with high aspiration risk .…”

mentioning

confidence: 99%

“…Different types of piezoelectric sensors were tested using commercial or ad-hoc designed devices. A PZT-based bulk sensor was used to evaluate the larynx movements for finding the best sensor position on the neck . The device was taped on the throat by a rigid plastic plate, making this solution uncomfortable for the patient as it affects the normal swallowing behavior.…”

mentioning

confidence: 99%

Conformable AlN Piezoelectric Sensors as a Non-invasive Approach for Swallowing Disorder Assessment

et al. 2021

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Deglutition disorders (dysphagia) are common symptoms of a large number of diseases and can lead to severe deterioration of the patient’s quality of life. The clinical evaluation of this problem involves an invasive screening, whose results are subjective and do not provide a precise and quantitative assessment. To overcome these issues, alternative possibilities based on wearable technologies have been proposed. We explore the use of ultrathin, compliant, and flexible piezoelectric patches that are able to convert the laryngeal movement into a well-defined electrical signal, with extremely low anatomical obstruction and high strain resolution. The sensor is based on an aluminum nitride thin film, grown on a soft Kapton substrate, integrated with an electrical charge amplifier and low-power, wireless connection to a smartphone. An ad-hoc designed laryngeal motion simulator (LMS), which is able to mimic the motions of the laryngeal prominence, was used to evaluate its performances. The physiological deglutition waveforms were then extrapolated on a healthy volunteer and compared with the sEMG (surface electromyography) of the submental muscles. Finally, different tests were conducted to assess the ability of the sensor to provide clinically relevant information. The reliability of these features permits an unbiased evaluation of the swallowing ability, paving the way to the creation of a system that is able to provide a point-of-care automatic, unobtrusive, and real-time extrapolation of the patient’s swallowing quality even during normal behavior.

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Untitled

Cited by 9 publications

References 34 publications

Aging‐related changes in swallowing, and in the coordination of swallowing and respiration determined by novel non‐invasive measurement techniques

Aging‐related changes in swallowing, and in the coordination of swallowing and respiration determined by novel non‐invasive measurement techniques

Analyzing Breathing Signals and Swallow Sequence Locality for Solid Food Intake Monitoring

Conformable AlN Piezoelectric Sensors as a Non-invasive Approach for Swallowing Disorder Assessment

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