Use of ultrasound in the evaluation of the vocal folds following thyroidectomy

Linares, Juan Pablo Aristizábal

doi:10.1016/j.rcae.2014.04.001

Cited by 3 publications

(2 citation statements)

References 20 publications

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“…Movements of the VFs occur during quiet respiration and phonation. [ 7 ] When air flows through the trachea and larynx, there is vibration and creation of mucosal wave. CDI can be used to visualise color images of mucosa-air interface and hence to deduce wavelength, frequency, and mean mucosal wave velocity.…”

Section: Discussionmentioning

confidence: 99%

Assessment of functionality of vocal cords using ultrasound before and after thyroid surgery: An observational study

Sinha

Kumar

et al. 2018

Indian J Anaesth

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Background and Aims:The preservation of recurrent laryngeal nerve (RLN) is an essential part of thyroid surgery. The various methods to test the normal functionality of vocal cords (VCs) include direct visualisation under the fiber bronchoscope, indirect laryngoscopy, laryngeal muscles electromyography, computed tomography (CT), and magnetic resonance imaging (MRI). We aimed to assess the usefulness of ultrasound (USG) in the examination of VC morphology and movement.Methods:After Institutional Ethical Committee (IEC) clearance, 65 American Society of Anesthesiologists physical status I/II patients between the age group 18 and 60 years scheduled for thyroid surgery were enrolled in this observational study. All patients underwent USG examination before, immediately after and 2 days after thyroidectomy. The vocal fold (VF) displacement velocity (VFDV) was recorded and analysed. If any VF disorder was detected, the patients underwent two additional examinations: 2 and 3 months after thyroidectomy. All the findings were correlated with those of video rhinolaryngoscope (VRL).Results:The visualisation rate of the VCs with USG was 96.9% whereas with VRL was 100%. Two patients had preoperative VC palsy that was picked up by USG and confirmed by VRL. The sensitivity and specificity of USG as a tool to detect paralysis were 100% CI = (0.34, 1.00) and 93.44% CI = (0.84, 0.97), respectively.Conclusion:USG examination can prove to be a good, noninvasive, cheap alternative to VRL in examination for functionality of VCs perioperatively.

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Section: Discussionmentioning

confidence: 99%

Assessment of functionality of vocal cords using ultrasound before and after thyroid surgery: An observational study

Sinha

Kumar

et al. 2018

Indian J Anaesth

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“…In our study, we placed the transducer directly on the VFs, the so-called direct approach. However, other researchers placed the transducer on the skin of the patient, which is called the transcutaneous approach [10,11,[13][14][15]54,[68][69][70]. In the direct approach, it was easy to identify the VFs, whereas in transcutaneous approaches, the visualization rate was only 36.7% for the true VFs [71].…”

Section: Measurements On the Vfsmentioning

confidence: 99%

Imaging the Vocal Folds: A Feasibility Study on Strain Imaging and Elastography of Porcine Vocal Folds

et al. 2019

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Vocal folds are an essential part of human voice production. The biomechanical properties are a good indicator for pathological changes. In particular, as an oscillation system, changes in the biomechanical properties have an impact on the vibration behavior. Subsequently, those changes could lead to voice-related disturbances. However, no existing examination combines biomechanical properties and spatial imaging. Therefore, we propose an image registration-based approach, using ultrasound in order to gain this information synchronously. We used a quasi-static load to compress the tissue and measured the displacement by image registration. The strain distribution was directly calculated from the displacement field, whereas the elastic properties were estimated by a finite element model. In order to show the feasibility and reliability of the algorithm, we tested it on gelatin phantoms. Further, by examining ex vivo porcine vocal folds, we were able to show the practicability of the approach. We displayed the strain distribution in the tissue and the elastic properties of the vocal folds. The results were superimposed on the corresponding ultrasound images. The findings are promising and show the feasibility of the suggested approach. Possible applications are in improved diagnosis of voice disorders, by measuring the biomechanical properties of the vocal folds with ultrasound. The transducer will be placed on the vocal folds of the anesthetized patient, and the elastic properties will be measured. Further, the understanding of the vocal folds’ biomechanics and the voice forming process could benefit from it.

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The Diagnosis of Vocal Cord Movement Impairment Using Ultrasonography: A Comparison of Transthyroid and Suprathyroid Views

Mohseni¹,

Alimian²,

Zaman³

et al. 2017

Ann Anesth Crit Care

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Use of ultrasound in the evaluation of the vocal folds following thyroidectomy

Cited by 3 publications

References 20 publications

Assessment of functionality of vocal cords using ultrasound before and after thyroid surgery: An observational study

Assessment of functionality of vocal cords using ultrasound before and after thyroid surgery: An observational study

Imaging the Vocal Folds: A Feasibility Study on Strain Imaging and Elastography of Porcine Vocal Folds

The Diagnosis of Vocal Cord Movement Impairment Using Ultrasonography: A Comparison of Transthyroid and Suprathyroid Views

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