High-Frequency Sonographic Measurements of True and False Vocal Cords

Qiao, Hui; Zhu, Shang-Yong; Luo, Feng; Gao, Yong; Xi-yue, Yang

doi:10.7863/jum.2010.29.7.1023

Cited by 66 publications

(66 citation statements)

References 17 publications

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“…There are some previous studies that clearly visualized the oropharyngeal anatomy including vocal folds and boluses in the oropharyngeal area by US examination [14][15][16][17]. The finding in this study that the pharyngeal residue was detected as a misty hyperechoic area above the vocal folds in US images that could be distinguished from the soft tissues around the vocal folds was consistent with these previous studies.…”

Section: Discussionsupporting

confidence: 82%

Detecting pharyngeal post-swallow residue by ultrasound examination: a case series.

et al. 2016

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Aims: Prevention of aspiration pneumonia is a great concern in the era of global aging. The assessment of pharyngeal post-swallow residue is important because remaining food and liquid in the pharyngeal area has a possibility of flowing into the lower airway which can cause aspiration pneumonia. Ultrasound examination has been recently used to assess swallowing disorders because of its noninvasiveness. The aim of this study was to investigate the performance for detecting pharyngeal post-swallow residue using an ultrasound examination by comparing with those using a fiberoptic endoscopic evaluation of a swallowing study as a reference. Material and methods: A linear array transducer attached to the thyroid cartilage to visualize the vocal folds in the sagittal plane. The pharyngeal post-swallow residue in the ultrasound movie was interpreted as a misty hyperechoic area above the vocal folds that remained after swallowing. Nineteen ultrasound images simultaneously obtained with fiberoptic endoscopic evaluation of swallowing study images from nine participants (eight men) with a median age of 70 years at a dysphagia outpatient clinic were analyzed by the montage of swallowing examinations. Results: Misty hyperechoic areas above the vocal folds that remained after swallowing were detected in 10 ultrasound images. Eight ultrasound images out of ten correctly detected pharyngeal post-swallow residue. The sensitivity for detecting pharyngeal post-swallow residue of 19 images from nine participants by ultrasound examination was 62%, and the specificity was 67%. Conclusions: The proposed detection method of pharyngeal post-swallow residue by ultrasound examination enabled the real-time assessment for swallowing of people with dysphagia. Ultrasound assessment-based daily swallowing care which detects pharyngeal residue will be useful for preventing aspiration pneumonia.

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Section: Discussionsupporting

confidence: 82%

Detecting pharyngeal post-swallow residue by ultrasound examination: a case series.

et al. 2016

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“…Both centers achieved an assessability rate of >94%, which seemed to be higher than other series. 10,11,15,16 Furthermore, neither center had a FN (ie, a missed postoperative VCP) on TLUSG. This finding concurred with our previous study, which found TLUSG to be an excellent a screening tool for DL in the postoperative setting.…”

Section: Discussionmentioning

confidence: 98%

The importance of sonographic landmarks by transcutaneous laryngeal ultrasonography in post-thyroidectomy vocal cord assessment

Wong

Woo

Youn

et al. 2014

Surgery

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“…Hu et al [16] measured wVF of 6.23±0.53 mm in males, and 4.90±0.35 mm in females by ultrasonographic evaluation of the true and false vocal cords. Our findings are consistent with their results.…”

Section: Discussionmentioning

confidence: 99%

A morphometric analysis of laryngeal anatomy: A cadaveric study

Enver¹

2018

Tr-ENT

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Objectives: This study aims to describe morphometric measurements of the laryngeal framework and discuss their implications for phonosurgery among Turkish subjects. Patients and Methods:Larynges from 40 male and 20 female fresh cadavers were extracted during autopsy in a forensic science institution between January 2015 and December 2015. Measurements were taken of the length of membranous and cartilaginous vocal fold (mVF, cVF), width and thickness of VF (wVF, tVF), anterior and posterior subglottic distance (AS, PS), width and height of thyroid cartilage (wTC, hTC), and distance between projection of anterior commissure to thyroid cartilage inferior border (pAC to TIB).Results: For all parameters, median and mean values were higher in male groups, but the differences were significant only in pAC to TIB, wTC, cVF and mVF groups (p<.05). No statistically significant difference between age groups was found. The location of AC was observed above the midpoint of the thyroid cartilage, and the mean distance between the pAC to TIB was 10.2±2.9 mm in males and 7.8±1 mm in females. The mean AS value was 13.14±3.67, whereas the posterior subglottic distance mean value was 7.14±1.35. Conclusion:Although sex is an important factor to define laryngeal morphometrics, age may not be a significant factor. The significant difference in mean distance from pAC to TIB among males and females is an important consideration in laryngeal framework surgery. However, studies with larger samples are needed to confirm our findings.

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High-Frequency Sonographic Measurements of True and False Vocal Cords

Abstract: Both true and false vocal cords can be shown by high-frequency sonography, which can quantitatively measure both true and false vocal cords with good reliability and reproducibility.

Cited by 66 publications

References 17 publications

Detecting pharyngeal post-swallow residue by ultrasound examination: a case series.

Detecting pharyngeal post-swallow residue by ultrasound examination: a case series.

The importance of sonographic landmarks by transcutaneous laryngeal ultrasonography in post-thyroidectomy vocal cord assessment

A morphometric analysis of laryngeal anatomy: A cadaveric study

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