The developing role of a paediatric voice clinic: a review of our experience

The Occurrence of Laryngeal Pathologies in a Treatment-Seeking Pediatric Population

OBJECTIVES

The purpose of this study was to 1) describe the age- and sex-specific occurrence of laryngeal pathologies in a treatment-seeking pediatric population in the voice unit of Ghent University Hospital, Belgium, and 2) describe this population in terms of vocal parameters, vocal complaints, influencing factors, and treatment history and recommendation.

STUDY DESIGN

Retrospective, observational study.

METHODS

All patient records were analyzed for children (0-18 years) who consulted the ear, nose, and throat department of Ghent University Hospital for the first time between July 2015 and June 2021 with complaints of dysphonia. In total, 103 children (66 males, 37 females) with a mean age of 10.01 years (SD: 3.4, range 3.93-17.96) were included in this study. Laryngeal pathology was diagnosed using a flexible videolaryngo(strobo)scopy. The influence of age and sex on laryngeal etiology (organic/functional voice disorder) was examined using a Welch-modified t test and a Fisher's exact test, respectively.

RESULTS

Organic lesions were observed in 77.7% of the participants, with vocal fold nodules (VFNs) being the most common diagnosis (66.0%). A functional voice disorder was diagnosed in 22.3% of the children. Children with a functional voice disorder are significantly older than children with an organic voice disorder. There was no statistically significant difference between males and females in laryngeal etiology. Mean dysphonia severity index was -2.7 (SD: 3.2, range -9.3 to +3.7), the mean acoustic voice quality index 4.70 (SD: 1.5, range 2.35-8.27), and the mean pediatric voice handicap index 29.8 (SD: 13.6, range 5-60). The occurrence of vocal misuse was mentioned in 80.6% of the patient records.

CONCLUSION

Organic voice disorders, especially VFNs, are predominant in treatment-seeking children with dysphonia. Functional voice disorders become more common with increasing age during childhood. A disordered vocal quality, reduced vocal capabilities and reduced voice-related quality of life were found.

Diagnosis and Treatment of Benign Pediatric Lesions

Dysphonia is common in pediatrics and affects individuals from infancy through their teenage years. Pediatric dysphonia has a variable impact on children, ranging from no impact to a severe social barrier. Although most etiologies are benign, potentially life-threatening causes must be ruled out by direct examination of the larynx. The most common benign lesions of the larynx in pediatrics are vocal nodules, vocal fold polyps, cysts, granulomas, ectasias, sulcus vocalis, and vascular lesions, including hemangioma and postcricoid cushion. Treatment of benign vocal lesions should be tailored to the individual patient and the perceived impact.

Development of a minimum protocol for assessment in the paediatric voice clinic. Part 1: evaluating vocal function

The European Laryngological Society (ELS) recommend that functional assessment of voice disorder in adults requires evaluation of a number of different parameters. The current paper presents a discussion of four of the five parameters highlighted in the ELS protocol: perceptual evaluation of voice, videostroboscopic examination, evaluation of aerodynamic performance in voice, and acoustic analysis. Subjective rating of voice in children is explored in a companion paper. These parameters have been extensively evaluated in adults, and a review of the literature pertaining to the paediatric population is presented.

The clinical application of electrolaryngography in a tertiary children's hospital

The assessment and management of children's voice disorders poses clinical challenges at many levels. Accurate diagnosis and treatment requires access to a range of tools and methods appropriate for use with paediatrics. The application of electrolaryngography to the management of children's voice disorders in a tertiary children's hospital is described, with examples drawn from four case studies. Measures of fundamental frequency, contact quotient, and irregularity are used routinely to clarify the nature of the vocal impairment and to evaluate treatment outcome. Real-time displays provide biofeedback to assist the development of new skills within therapy programmes.

Pain perception of children undergoing nasendoscopy for investigation of voice and resonance disorders

The primary objective of this descriptive and correlational study was to determine the level of pain and discomfort perceived by children undergoing nasendoscopy for investigation of voice and resonance disorders. The secondary objective was to explore whether gender, age, previous experience of painful or distressing medical procedures, and previous experience of nasendoscopy influenced the perception of pain during nasendoscopy. Twenty-three children self-reported the degree of pain perceived during nasendoscopy using the Wong-Baker Faces Pain Rating Scale. Parents also used this scale to rate their child's perceived pain. Otolaryngologists and speech pathologists rated the intensity and frequency of observed pain-related behaviors using the Child-Adult Medical Procedure Interaction Scale-Revised and the Procedure Behavior Checklist. Children perceived the procedure, on average, to be moderately painful, as did their parents. Only two children reported perceiving no pain during the procedure. The most frequently observed pain-related behaviors were muscle tension (86.96%), physical resistance (69.57%), requiring physical restraint (60.87%), crying (43.48%), and expressions of verbal pain (39.13%). No significant correlations were found between self-reported pain or observed pain and the variables of age, gender, previous experience of nasendoscopy, and previous experience of painful or distressing medical procedures, although children aged 4-7 years reported significantly more pain than children aged 8-18 years. Most children perceive nasendoscopy to be painful to some degree. This perceived pain occurred in conjunction with several observable pain-related behaviors that have the potential to interfere with the success of the procedure.

Does a specialist voice clinic change ENT clinic diagnosis?

General ENT clinics lack the high quality diagnostic equipment and multidisciplinary advice that is available in the voice clinic. We wished to find out if referral to a specialist voice clinic from general ENT consultant clinics resulted in a change in diagnosis. Lists of voice clinic attendees were reviewed between January 2003 and May 2004. Notes were obtained for 20 patients who attended voice clinic after referral from a general ENT clinic: 3 had no diagnosis on referral to voice clinic, a diagnosis was given after attendance; 8 had their referring diagnosis changed by attendance; and 9 had no change. The voice clinic adds diagnostic value to the service available in general ENT clinics.

The feasibility of rigid stroboscopy in children

OBJECTIVE

Voice disorders in children are common but ways of their analysis are limited. We conducted a prospective feasibility study of rigid stroboscopy in children.

METHODS

All children referred for voice analysis during the years 2002-2003 were evaluated including subjective perception of voice, voice recording, flexible or rigid laryngoscopy and stroboscopy. Children were prepared by an explanation and visual demonstration. Local anesthesia was introduced through inhalation of Lidocaine (2%) solution prior to examination. Stroboscopy was performed either by a 70 degrees rigid laryngoscope or by a 3.0 mm fiberoptic-flexible endoscope.

RESULTS

Forty-two children were analyzed. Rigid stroboscopy was feasible in 31 children of whom 7 were under 10 years of age. Short phonation time (7), gag reflex (6), impaired view due to high and posteriorly inclined epiglottis (4) were the main reasons of failure.

CONCLUSIONS

Standard telescopic stroboscopy can be safely and effectively implemented in the majority of children over 10 years of age.

[Objective study of the voice in a normal population and in dysphonia caused by nodules and vocal polyps]

A study of the objective evaluation of voice was made of 100 voices of healthy adults and 60 with disphonia (nodules and polyps). A laryngostroboscopy and an acoustic analysis was made to everyone. A sustained vowel "a" was carried out and digitalized with Dr. Speech Science software. These parameters were estimated: fundamental frequency (Fo, according to gender), Jitter, Shimmer and glottic noise (NNE, HNR, SNR). In the healthy group Fo was 139.72 in men and 267.33 in women, jitter 0.24 and shimmer 2.10. In disphonic patients (nodules) Fo was 126.96 in men and 240.72 in women, jitter 0.35 and shimmer 3.25. In disphonic patients (polyps) Fo was 119.75 in men and 218.26 in women, jitter 0.50 and shimmer 4.34. These difference were statistically significant. Glottic Noise in healthy group was: NNE -13.62, HNR 24.07 and SNR 24.49; in disphonic patients (nodules) was: NNE -10.65, HNR 25.21 and SNR 25.55; in disphonic patients (polyps) was: NNE -8.24, HNR 29.63 and SNR 28.22. Only the difference in the NNE was statistically significant. We highlight the importance of objective evaluation of voice disorders.