A Relation Between the Piezoelectric Pulse Transducer Waveforms and Food Bolus Passage during Pharyngeal Phase of Swallow

Toyosato, Akira; Nomura, Sadahiro; Igarashi, Atsuko; Naoko,; Nomura, Akihiro

doi:10.2186/prp.6.272

Cited by 15 publications

(14 citation statements)

References 3 publications

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“…In a previous study [3] analysing simultaneously collected sSH EMG and piezoelectric data, the authors documented that a large positive deflection in their piezoelectric record corresponded to laryngeal downward movement. Our present study revealed a very similar positive deflection ('P 3 ' in figure 2), and we also observed the last component of the intsSH EMG in all five subjects, but similar previous studies have made little mention of this component [3][4][5]7,9,10]. This disparity may be due to methodological differences, such as subtle differences in the kind and placement of electrodes, that could alter the sEMG that is recorded.…”

Section: Discussionsupporting

confidence: 87%

“…In one such study [3], for example, the authors investigated the relationship over time between the PES trajectory and surface electromyograms (sEMGs) of the submental and cricopharyngeous muscles during the oropharyngeal swallowing of liquid and solid test foods. Another study assessed the pharyngeal and esophageal transit of a bolus videofluorographically and found that characteristic videofluorographic features of the swallow (such as the pharyngeal transit time) correlated well with key features of the simultaneously recorded PES trajectory [4]. These studies suggest that PESs are suitable and useful in the research and clinical fields of swallowing, especially because they are readily available and do not involve exposure to radiation.…”

Section: Introductionmentioning

confidence: 92%

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Comparison of video-recorded laryngeal movements during swallowing by normal young men with piezoelectric sensor and electromyographic signals

Ashida

Miyaoka

2009

Journal of Medical Engineering & Technology

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The movement of the larynx in five young men during the swallowing of a liquid was examined by simultaneously recording a video-movie, the trajectory of a piezoelectric sensor, and the surface electromyogram of the suprahyoid muscles (SH). The movies revealed swallowing was associated with four characteristic spatial points of laryngeal movement: (1) a slight movement in the superior posterior direction (1.9 +/- 1.2 s; mean +/- SD of the time elapsed after the command to swallow was issued); (2) the initiation of anterosuperior elevation (2.3 +/- 1.3 s); (3) the turn at the highest position (3.2 +/- 1.2 s); and (4) the return to the initial position (4.1 +/- 1.4 s). The piezoelectric sensor and the SH electromyogram also detected characteristic temporal points that closely corresponded to the characteristic temporal points captured by the video. The advantages of using movies in swallowing research are discussed.

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Section: Discussionsupporting

confidence: 87%

Section: Introductionmentioning

confidence: 92%

Comparison of video-recorded laryngeal movements during swallowing by normal young men with piezoelectric sensor and electromyographic signals

Ashida

Miyaoka

2009

Journal of Medical Engineering & Technology

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“…Recently, some other researchers even took advantage of VF and videoendoscopy (VE) to observe the temporal aspects of swallowing [27], [28]. They successfully recorded the thyroid cartilage trajectory over time and related pharyngeal swallowing events, such as epiglottis activity and laryngeal closure.…”

Section: Introductionmentioning

confidence: 99%

Development of a System to Monitor Laryngeal Movement during Swallowing Using a Bend Sensor

Hori

Minagi

et al. 2013

PLoS ONE

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BackgroundSwallowing dysfunction (also known as dysphagia), which results in a deterioration of nutritional intake, slows rehabilitation and causes aspiration pneumonia, is very common following neurological impairments. Although videofluorographic (VF) examination is widely used for detecting aspiration, an objective and non-invasive method for assessing swallowing function has yet to be established because of a lack of adequate devices and protocols. In this paper, a bend sensor whose resistance is altered by bending was introduced to monitor swallowing-related laryngeal movement.MethodsSix healthy male volunteers were recruited in the present study. Specific time points on the signal waveform produced by the bend sensor were defined to describe laryngeal movement by differential analysis. Additionally, the physiological significance of the obtained waveform was confirmed by analyzing the sequential correlations between the signal waveform from the bend sensor and hyoid bone kinetics simultaneously recorded by VF.ResultsSeven time points were successfully defined on the signal waveform to reference laryngeal movement. Each time point was well correlated with certain VF events, with evidence of no significant time lags, and there were positive correlations between waveform time points and matched VF events. Furthermore, obvious similarities were noticed between the duration of each phase on the signal waveform and the duration of the matched hyoid bone activity.ConclusionsThe present monitoring system using a bend sensor might be useful for observing the temporal aspects of laryngeal movement during swallowing, and it was well coordinated with hyoid bone movement.

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“…This provides important information about the timing of swallowing; see e.g. [1][2][3][4][5]. Moreover, the piezoelectric sensor, when attached to the chest, detects the respiratory movement during sleeping and is valuable for monitoring respiration in the clinic; see e.g.…”

Section: Introductionmentioning

confidence: 99%

“…In the present study, we evaluated the applicability of piezoelectric sensors for studying speech by attaching a piezoelectric sensor to the front of the neck. As a control, we also recorded the electrical potential changes that occur during swallowing, as reported previously [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Applicability of piezoelectric sensors for speech rehabilitation

Miyaoka

Ashida

Kawakami

et al. 2009

Journal of Medical Engineering & Technology

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The applicability of piezoelectric sensors for speech rehabilitation was examined by setting vocalizing tasks for seven healthy young adults (four men and three women). A piezoelectric sensor was attached to the front of the neck and each seated subject was instructed to vocalize /a/ with subjective low and high tones and /pa/, /ta/, and /ka/ with a subjective middle tone. The three major findings were: (1) slow potential changes recorded at the start of these tasks were followed by rapid changes; (2) the tasks did not differ in the average range of the slow changes; (3) female subjects had higher average frequencies of rapid changes than male subjects. The frequencies and phases of the rapid changes paralleled the sound waves recorded in the neck during the tasks. Swallowing tasks verified the appropriateness of the recording system. The advantages of using piezoelectric sensors in the clinic are discussed.

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A Relation Between the Piezoelectric Pulse Transducer Waveforms and Food Bolus Passage during Pharyngeal Phase of Swallow

Cited by 15 publications

References 3 publications

Comparison of video-recorded laryngeal movements during swallowing by normal young men with piezoelectric sensor and electromyographic signals

Comparison of video-recorded laryngeal movements during swallowing by normal young men with piezoelectric sensor and electromyographic signals

Development of a System to Monitor Laryngeal Movement during Swallowing Using a Bend Sensor

Applicability of piezoelectric sensors for speech rehabilitation

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