Three-dimensional Characteristics of the Larynx With Immobile Vocal Fold

Abstract

To evaluate the 3-dimensional (3-D) characteristics of the laryngeal lumen in patients with unilateral vocal fold immobility (UVFI) during phonation with the aid of multislice helical computed tomography (MSHCT).

Unilateral vocal fold paralysis: can laryngoscopy predict recovery? A prospective study

“…10 In our study, there was vocal fold over-adduction in 47.92 per cent of cases. It was noted that those patients with vocal fold over-adduction did not require intervention, especially if the position of the affected fold was adducted.…”

“…9 The compensatory movement of the normal side was assessed at the level of the glottis and supraglottis where it crosses the midline (Figure 8). 10 The vertical height of the affected fold could be higher, lower or equal to that of the innervated fold ( Figure 9). The most important finding of the video images for determining the height of the paralysed vocal fold was the pattern of contact between the vocal processes of paralysed and normal vocal folds during phonation when both were well visualised.…”

“…A total of six criteria were assessed, with a formal definition of each criterion based on literature review findings. [5][6][7][8][9][10] The first three criteria were assessed during each visit and the last three were assessed after six months from the onset of symptoms. The findings were reassessed by all three examiners together and a common consensus was sought.…”

Laryngeal Muscle Activity in Unilateral Vocal Fold Paralysis Patients Using Electromyography and Coronal Reconstructed Images

“…10 The authors have developed a 3DCT technique using coronal reconstructed images to observe the thickness and location of the vocal folds during phonation and inhalation to determine glottal configuration. [10][11][12] This study assessed laryngeal muscle activity in patients with UVFP using LEMG, aerodynamic analysis and glottal configuration based on a 3DCT technique during phonation and inhalation.…”

Dual-Energy Subtraction Imaging for Diagnosing Vocal Cord Paralysis with Flat Panel Detector Radiography

“…Although the flexible laryngoscopy is currently the diagnostic modality of choice for vocal cord paralysis, there is issue with patient discomfort, intolerance to its insertion and the necessity of ear-nose-throat (ENT) specialists with sufficient experience and skills. Radiological examinations, including conventional laryngeal radiography, tomography, contrast laryngography, and computed tomography (CT) can overcome these disadvantages (1-5). The classic findings of vocal cord paralysis on these examinations are secondary to atrophy of the thyroarytenoid muscle (1-3).…”