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Endoscopic and stroboscopic description of adults with paradoxical vocal fold dysfunction.

The purpose of this study was to determine if endoscopic and stroboscopic parameters of voice were normal between attacks of paradoxical vocal fold dysfunction (PVFD). Fifty adults (38 females, 12 males) and 54 adult controls (40 females, 14 males) were examined via endoscopy with and without stroboscopy. Endoscopy indicated paradoxical adduction of the folds during the respiratory cycle of all 50 participants with PVFD, although they were asymptomatic. Atypical laryngeal configurations were observed including abnormality of the anterior-posterior dimension and ventricular fold medialization in both groups of subjects. Stroboscopy demonstrated abnormalities including unstable zero phase, decreased amplitude of vibration, decreased mucosal waves, and phase asymmetry primarily for the PVFD subjects alone. Results indicate that persons with PVFD demonstrate subtle laryngeal abnormality endoscopically and stroboscopically when dyspnea is not reported. This supports the hypothesis that PVFD is not episodic but exists as a continuum of laryngeal instability that may, due to various precipitating factors, be exacerbated to breathing attacks.

Adult↗

A case of high-pitched diplophonia that resolved after a direct pull of the lateral cricoarytenoid muscle.

Various approaches have been employed for the surgical treatment of unilateral vocal cord paralysis. Recently, we performed a direct pull of the lateral cricoarytenoid muscle in a case of high-pitched diplophonia with little difference between the right and left vocal cord levels and obtained favorable results. The patient was a 66-year-old male who consulted our hospital with chief complaints of husky voice and abnormal sensation in the pharyngolaryngeal region. Cerebellum/brainstem inflammation was diagnosed in February 2002 and appropriate treatment was instituted. Despite an improvement in the patient's systemic condition, right vocal cord paralysis remained. Although there were no abnormalities in the vocal range for ordinary speech, diplophonia was noted at high pitches, and synchronization could not be observed using stroboscopy. Therefore, the patient was operated on in October 2002. The high-pitched diplophonia disappeared and stroboscopy revealed favorable mucosal waves at high pitches. Thus, direct pulling of the lateral cricoarytenoid muscle appears to be a useful procedure, even in a case of mild unilateral vocal cord paralysis.

Aged↗

Autologous transplantation of fascia into the vocal fold: long-term results of a new phonosurgical technique for glottal incompetence.

OBJECTIVES: To study the long-term results of autologous transplantation of fascia into the vocal fold, and to evaluate our use of autologous transplantation instead of bovine collagen injection in cases of glottal incompetence. STUDY DESIGN: Retrospective study of the patients who have undergone autologous fascia transplantation using our new technique. METHODS: Follow-up studies were performed for at least 1 year (up to 3 y) on 9 autologous fascia transplant patients (6 cases with type 1 procedures and 3 cases with type 2 procedures). Clinical observations, including laryngeal stroboscopy, and measurement of maximum phonation time (MPT) were carried out. RESULTS: During 3 months after autologous fascia transplantation, MPT gradually increased and stroboscopy showed improved glottal closure. These improvements continued beyond 1 year in all cases of type 1 surgery and 2 of 3 cases of type 2 surgery. CONCLUSIONS: Autologous transplantation of fascia into the vocal folds as a phonosurgical treatment for glottal incompetence yields excellent long-term results. Temporal fascia appears to be a highly suitable tissue for transplantation in Reinke's space. However, the fascia is less suitable for transplantation in the muscle. We speculate that transplantation of temporal fascia leads to regeneration of vocal fold tissue, perhaps using a mechanism similar to stem cell transplantation in other organs.

Adult↗

[Laser measuring device for phonation].

INTRODUCTION: Clinical examinations with short-interval, color-filtered double-flash stroboscopy enable us to estimate the movements of the vocal fold edges during phonation. So-called 'displacement bands' show the degree of the vibratory amplitude in these images. Using the two-point light projection method the displacement bands can be measured with very high accuracy. A combination of these two methods was used for velocity measurements of the vocal fold movements within the phonatory cycle. The aim of the study was to explore the influence of change in sound pressure level (SPL) and fundamental frequency (F0) on the velocity of the horizontal amplitude of the vocal folds during phonation. MATERIAL AND METHODS: 40 healthy volunteers (31 women, 9 men, average age 24.8 years) were examined. During the special videostroboscopy with short-interval, color-filtered double flashes laser spots were projected onto the vocal folds by an endoscopic two-point light projection device. The subjects had to change their SPL and F0 following a test protocol. During phonation they had to produce tones in low, middle and high chest voice as well as in falsetto register. Each subject was asked to do this in a soft, a modal, a loud and a very loud manner. Images of the phonatory cycle showing the vocal folds immediately before collision were measured separately at three different positions. About 15,000 single measurements were evaluated. RESULTS: The measured velocity of the horizontal amplitude during the closing phase of the vocal folds in chest voice was 30-160 cm/s. An increase in SPL resulted in an increasing velocity of the displacement bands. A change in F0 did not lead to statistically relevant changes in the measured velocity. CONCLUSION: A combination of short-interval, color-filtered double-flash stroboscopy and a two-point light projection method enables measurements of the velocity of vocal fold movements. The SPL is the important factor for the velocity change within the phonatory cycle. F0 seems not to covary with the velocity of the horizontal amplitude during the closing phase of the phonatory cycle.

Adolescent↗

Combined buccal mucosa island and sternohyoid flaps: a new technique of hemilaryngeal reconstruction studied in a canine model.

No single method of reconstruction has proven ideal for all patients with defects following vertical hemilaryngectomy. In this report, we detail a new technique for hemilaryngeal reconstruction involving the use of a pedicled buccal mucosa island flap supplied by the facial artery and vein. The buccal flap was used to resurface a transversely oriented sternohyoid myofascial flap. The reconstructive outcome was analyzed in 4 animals, 3 of which survived the early postoperative period. Videoendoscopy and stroboscopy were performed to analyze the laryngeal configuration and vibration. Each subject was decannulated and had a competent airway free of aspiration. After sacrifice of the animals, whole organ axial sections were made at multiple levels. Endoscopic and histologic findings documented that this technique produced an appropriate neocord position. Laryngeal stroboscopy in each animal showed bilateral mucosal traveling waves, with entrainment of the reconstructed neocord mucosa and native vocal cord mucosa. We conclude that the layered reconstructive technique described, compared to traditional methods of reconstruction, more closely replicates the structure of the excised tissue in hemilaryngeal reconstruction, potentially resulting in an improved voice outcome.

Animals↗

Fat implantation into Reinke's space: a histologic and stroboscopic study in the canine.

The scarred vocal fold is a cause of persistent dysphonia after laryngeal trauma, microsurgery, and tumor resection. The loss of Reinke's space with scar and stiffness is the primary cause. This study explores the technical aspects of endoscopic implantation of fat as an autologous implant for restoring the bulk and pliability of the vocal folds. Fat from the buccal area was harvested and prepared in 6 dogs. A mucosal flap submucosal pocket was prepared by means of microlaryngoscopy instrumentation. The fat implant was placed into the submucosal pocket. The mucosal flap was sutured endoscopically. Six weeks later, the larynx was harvested and mounted, and vocal fold oscillation was studied while driven by a humidified flow source. The vibratory patterns were studied by stroboscopy. Histologic sections of the vocal folds were made in the coronal plane. All 6 specimens had histologic evidence of viable implanted fat and/or fibrous tissue at the implant site. The site of implantation was in the superior aspect of the vocal fold, but contributed to mass in vocal fold bulk. This increase in bulk histologically corresponded to stroboscopic evidence of increased mass. On stroboscopy, the implant side continued to demonstrate good vibratory function. The study shows that fat implantation can be carried out as an endoscopic procedure. Fat implantation may be useful as a surgical procedure for restoration of Reinke's space. It may be applicable in patients with scars, sulcus vocalis, or vocal fold atrophy.

Adipose Tissue↗

[Mucosal bridge of the vocal fold].

Mucosal bridge of the vocal fold is a newly recognized laryngeal disease need to be differentiated from the functional voice disorder. A 16-year-old woman with deteriorating hoarseness presented for indirect laryngoscopy and laryngofiberoscopy of just slight swelling of the bilateral vocal folds. Since the laryngeal stroboscopy revealed the decrease of wave formation at the swelling portion, we performed an endolaryngeal microsurgery and discovered a sulcus in a side of the vocal fold and a mucosal bridge in the other side. Resection of the bridge followed by the voice therapy increased the voice range and decreased the hoarseness. This case suggests that the laryngeal stroboscopy and microscopic examination with direct laryngoscopy are the most important for diagnosing the mucosal bridge of the vocal fold.

Adolescent↗

[The pathogenesis and treatment exploration of vocal cord paralysis].

OBJECTIVE: To investigate the causes and effective treatment of vocal cord paralysis(VCP). METHOD: Sixty-five patients with VCP in our hospital in recent 10 years were analyzed. All the patients underwent examination by indirect laryngoscope, stroboscopy or electrolaryngostroboscopy, of which, 31 cases were operated by stiring arytenoid cartilage. RESULT: Fourteen cases with VCP were caused by neck and thoracic tumor; Nine cases were caused by infectations; sixteen cases were caused by neck, thoracic, abdominal openations; twelve cases were caused by trachea intubation; Three cases were caused by gastric intubation; Eleven cases were caused without obvious reason. All the symptoms of VCP were cured after treatment in 37 cases. The improvement rate of hoarseness was 58.46%. CONCLUSION: Patients with hoarseness should be routinely examinated by indirect laryngoscope, stroboscopy or electrolaryngostroboscopy. Arytenoid cartilage of patients with VCP should be stired by indirect laryngoscope or direct laryngoscope or self-retaining laryngoscope as early as possible.

Adolescent↗

Exploration of glottic function before and after injection of collagen for rehabilitation of the vocal cord.

After more than one year's use of injectable collagen for vocal and glottic rehabilitation, the subjective and objective results have been presented for a series of 18 patients, 17 of whom had paralysis of one vocal cord, while one patient had a post-traumatic atrophy of the left cord. The assessment is based on rigid and flexible fibroscopy, stroboscopy, the objective phonatory assessment with measurement of the phonatory quotient and mean flow rate, EMG of the vocal cords and frequential analysis of the voice. Apart from the improvement in the phonatory quotients and outputs after injection, the noteworthy results have been the persistence of flexibility and undulation in the cord injected, visible by stroboscopy, and also the reappearance of the fundamental and 2 or 3 first harmonics on frequential analysis of the voice. The mean follow-up was 6.5 months, with a maximum of 14 months and minimum of 1 month. At the medium term, injectable collagen would appear to be a worthwhile alternative to Teflon because of its simplicity of use, its very great tolerance and the quality of the functional results obtained.

Adult↗

[CO2 laser treatment; an effective and minimally disruptive endoscopic therapy for small glottic laryngeal carcinomas].

OBJECTIVE: To evaluate endoscopic CO2 laser vaporization as a treatment of small glottic laryngeal carcinomas selected by means of video laryngo-stroboscopy. DESIGN: Prospective. SETTING: ENT department, University hospital, Free University Amsterdam. METHODS: Patients with a small glottic laryngeal carcinoma (stage Tis or T1a), were selected by means of video-laryngo-stroboscopy for a single stage endoscopic CO2 laser vaporization treatment as an alternative for radiotherapy. They were followed up for at least 24 months. RESULTS: Three of the 46 patients (6%) developed a local recurrence within 2 years; one of these could be treated once more with the CO2 laser, the other two were irradiated. None of these patients developed metastases in cervical lymph nodes or distant metastases. Most patients (41, 89%) assessed their voices after CO2 laser vaporization as normal or almost normal. Slight dysphonia was reported by five patients (11%). No serious dysphonia or aphonia occurred. CONCLUSION: Endoscopic CO2 laser vaporization, compared with radiotherapy or more extensive surgery, constitutes an adequate treatment for selected patients with small glottic laryngeal carcinomas. As a result of this treatment, it will be possible to preserve the larynx in more patients.

Adult↗

[Harmonic/noise ratio and spectrographic analysis in vocal abuse pathology].

Vocal abuse lesions disturb voice production by increasing the presence of noise in the voice. The harmonic-to-noise ratio (H/N) and spectrography are two different ways to evaluate noise components in the voice. A study was made of 52 patients (32 polyps, 11 Reinke's edema and 9 nodules) who underwent microlaryngeal phonosurgery. The grade of glottic closure was determined by stroboscopy; H/N and the long-term average spectrum (LTAS) at low-frequency (0-2000 Hz) were measured with a CSL-4300 instrument. Stroboscopy and acoustic analysis were made before surgery and two week and one month after surgery. Before surgery, the LTAS revealed weak harmonics, as shown by H/N values. After surgery, H/N values and harmonic energy increased. Preoperative and postoperative differences were significant (p < 0.05). Improved glottic closure after surgery improved the acoustic parameters.

Edema↗

[Phonosurgery of chronic vocal cord edema].

INTRODUCTION: Chronic (Reinke's) oedema of the vocal folds is a frequent and declicate objective of phonosurgery. It is characterized by a marked bilateral subepithelial oedema, which develops by degrees, as a non-specific reaction of the vocal folds to various irritative noxious agents (especially smoking), in patients with some predisposition. It is found, by the light and electron microscopes and immunohistochemistry, that oedema is characterized by subepithelial fissure-like spaces, which accumulate a protein-rich fluid, and develops like neobursae. Therefore, mechanical factors and functional influences may also contribute to the development of Reinke's oedema. The voice is low pitched and with various degrees of hoarseness. Reinke's oedema alters the mechanical properties of the cover, which becomes very pliable and with reduced stiffness, incapacitating the vocal fold for production of high tones. Hoarseness is induced in subject with associated laryngitis, or disbalance in mechanical properties of the vocal folds. Hyperkinetic pattern of voice production can often be seen in patients with Reinke's oedema, which is a compensatory results of reduced functional capability of the vocal folds. Stroboscopy reveals a prolonged closed phase of the vibratory cycles and strikingly marked mucosal waves. MATERIAL AND METHOD: A series of 371 patients with Reinke's oedema was operated by direct microlaryngoscopy, under the general anaesthesia. The "excessive" mucosa was removed by bimanual micro-procedure, while the care was not taken to severe layers deeper than a superficial part of the intermediate layer of the vocal fold (Reinke's space). In this procedure we used the micro-forceps and scissors, to detach oedema parallel to the free edge of the vocal fold, at its upper and lower demarcation lines, beginning from the posterior part of oedema. Another 27 patients were operated by indirect procedures. Microstroboscopy (IMS) was used in subjects, while videostroboscopy (IVS) was carried out in another 18 patients. These procedures were used when general anaesthesia was contraindicated, and in patients with Reinke's oedema of the first degree (initial oedema). In these patients only a mucosal strip was removed from the upper surface of the vocal fold, apart from the free edge. Oedema was removed bilaterally, while the formation of the postoperative web was prevented by regular examinations of the patient. In several cases of adherence between the two folds in their anterior commissure, the problem was solved indirectly by the use of a curved forceps and under the topical anaesthesia. Postoperative voice rest and administration of steroids were mandatory. Surgical and functional results were followed-up by stroboscopy over the period of at least three years after surgery. The majority of patients were additionally treated by the voice therapy, while the decision about its use was made three weeks after surgery. RESULTS: Functional results of our therapeutic strategy were satisfactory in our series of 398 subjects with Reinke's oedema. In comparison with other benign lesions of the vocal folds, it was more time-consuming and required a more frequent use of the postoperative voice therapy (Table 1). Thus, we have not encountered recurrences. DISCUSSION: During the last 10 years we operated on 1550 patients with various benign lesions of the vocal folds, including 398 subjects with Reinke's oedema (25.7%). Excision of the "excessive" mucosa may appear today as a procedure which is too radical if compared with many techniques which have been offered during the last decades: conservative excision and suction, squeezing technique, laser. Nevertheless, the histological structure of Reinke's oedema, with subepithelial fissure-like spaces indicated that the latter procedures can hardly be expected to prevent recurrences. It was found that the use of laser was not favourable in this area for its deteriorative local effect.

Chronic Disease↗

Sulcus vocalis: a review.

Sulcus vocalis is described as a groove at the free edge of the vocal fold. Different types have been described: sulcus type I is superficial and may be considered as moreless physiologic. Sulcus type IIa corresponds to a kind of vergeture along the margin of the vocal fold. Its deepness is variable but sulcus vergeture may involve deeper layers of the lamina propria. Sulcus type IIb or pounch may be considered as an open cyst. Sulcus lead to a complex glottic dysfunction with, in the same time, a glottal leakage responsible for the breathy component of the dysphonia and a stiffness of the free edge responsible for the roughness. Diagnosis may be difficult even with the help of stroboscopy and finally is sometimes done only under general anesthesia. Etiology remains controversial and the authors present arguments for each theory, acquired or congenital. Treatment options include phonosurgery and speech therapy but phonosurgery gives results often disappointing and surgical treatment must be indicated prudently and patient must be intensively informed on what he or she can expect from the treatment that is mainly an increase of the loudness of the voice.

Diagnosis, Differential↗

Vocal fold polyp in a professional brass/wind instrumentalist and singer.

Wind instrumentalists, especially brass players, and singers share common factors, including vocal tract shape, function and pressure, vocal fold opening and closure, breath vector of force and air flow rates. To understand the mechanism and function of the vocal folds with a pathological lesion, it is necessary to visualize the differing interactions of the vocal tract during wind and brass instrument playing and in singing. A school band director, singer, wind and brass instrumentalist, was referred by musician colleagues with intermittent dysphonia, aphonia, and inability to sing high notes. Simultaneous videolaryngoscopy, with and without stroboscopy, and external video examination were documented. An hourglass glottis with a sessile, cystic polyp of the left vocal fold were recorded and studied during phonation and the playing of 3 instruments. The techniques of glottic opening, closure, configuration and function varied with the type of instrument and phonatory function. Singing was adversely affected by the vocal fold polyp but no harmful interaction occurred during wind/brass instrument playing. Down-stream loading in singers is at the laryngeal level and in wind/brass instrumentalists is at the embouchure. Preoperative voice therapy, phonomicrosurgery, and postoperative voice rest followed by voice therapy, succeeded in restoring her combined wind/brass instrumental and singing career.

Adult↗

Vocal process avulsion.

Vocal process avulsion is a rare complication of intubation or external laryngeal trauma that can cause significant dysphonia. The vocal process develops independently from the body of the arytenoid cartilage, which results in a fusion plane that is vulnerable to trauma. The findings of vocal process avulsion may be subtle, and the relationship of the vocal process to the body of the arytenoid cartilage must be examined closely. Stroboscopy is critical in the evaluation. We describe three cases of vocal process avulsion encountered by the senior author (R.T.S.) over the last 5 years and discuss our approaches to evaluation and treatment. All cases were repaired endoscopically. However, we used three different techniques. These include chemical tenotomy with botulinum toxin, closed reduction with fat injection, and open reduction via cordotomy.

Adipose Tissue↗

Laryngeal dysfunction after thyroid surgery: diagnosis, evaluation and treatment.

Because of the close anatomical relationships between thyroid gland and laryngeal nerves, sensory-motor impairment of the laryngeal functions is a well known possible complication of thyroid surgery. Laryngeal nerve paralysis can present with various and often associated symptoms like dysphagia, aspiration, voice alteration or dyspnea. Several examination procedures are mandatory to perform a complete neuro-laryngeal evaluation: rigid and flexible video-stroboscopy will assess the abductor, adductor and tensor functions in breathing, sniffing, talking and eventually singing tasks. Laryngeal electromyography (LEMG), despite its technical difficulties, brings valuable objective and pronostic informations. Aerodynamic assessment of voice production and objective acoustic voice evaluation are important for patients' follow-up, especially for voice professionals like teachers and singers. Treatment of laryngeal sensory-motor nerve paralysis can be conservative, with the help of speech therapy. Early surgical treatment is indicated in cases with severe functional problems like aspiration pneumonia, disabling breathy hypophonia, ineffective cough, disabling dyspnea. Surgical therapy at 6 to 9 months after injury is indicated in patients who demonstrate evidence of denervation or little activity on LEMG and have a poor response to a reasonable trial of speech therapy. Many surgical procedures are available. Depending on the type of neuro-laryngeal deficit, the main and more widely used techniques are: injection laryngoplasty, medialization thyroplasty, arytenoid adduction, arytenoidopexy, crico-thyroid approximation, endoscopic laser cordotomy and re-innervation procedures.

Deglutition Disorders↗

Autologous transplantation of fascia into the vocal fold: long-term result of type-1 transplantation and the future.

OBJECTIVES: Since 1997, we have performed the autologous transplantation of fascia into the vocal fold (ATFV) procedure on cases of sulcus vocalis. In what follows, we report the long-term results of our new surgical approach and discuss the role of these transplantations. We also review and report some complications that can be caused by ATFV. Finally, we discuss the ATFV technique as a contribution to the phonosurgery of the future. STUDY DESIGN: Prospective study. METHODS: We were able to obtain long-term results from 10 volunteer cases (2 female and 8 male, age: 15-71, mean 46.5 years old) who could be followed up for at least 3 years after transplantation. All were cases of pathologic sulcus vocalis.We measured maximum phonation time (MPT) and carried out pre- and postsurgical clinical observation and laryngeal stroboscopy in all cases. These measurements and observations were made before the ATFV and at 6 months, 1 year, 2 years, and 3 years after surgery. RESULTS: In stroboscopic observation 1 year after the ATFV, satisfactory glottal closure and excellent mucosal wave were observed for all cases, and there was no case with hyperadduction of the false vocal folds. MPT measures remained at an improved level 2 years and 3 years after the transplantations. Paired-sample t tests showed that the improvement relative to preATFV levels was significant for all postsurgical measurements up to 3 years. CONCLUSIONS: We conclude that ATFV is a successful surgical procedure for sulcus vocalis and scarred vocal folds. Other phonosurgical clinical applications may also be envisioned.

Adolescent↗

Office steroid injections of the larynx.

OBJECTIVE: Steroid injection into the larynx has been sporadically reported as helpful in benign lesions of the larynx. Its role in laryngology remains unclear. This study reviews the indications and results of 47 steroid injections in 34 patients in an office setting. METHODS: The authors conducted a retrospective review of 47 injections in 34 patients. Methylprednisolone acetate suspension, USP (40 mg/mL), was injected by indirect laryngoscopy under local anesthesia. Results were evaluated by stroboscopy and by perceptual evaluation of the GRABS scale before and after injection. Pre- versus postinjection ratings were compared by paired t test. RESULTS: Indications for injection were: 1) postoperative scar with local stiffness (12 patients), 2) vocal nodules and polyp (18 patients), and 3) sarcoidosis/granuloma (4 patients). Steroid injections were done in professional singers instead of repeated oral administration of steroids and/or to avoid surgery in patients with polyps and cysts. Improvement was noted in 28 of 34 (82%). Eleven of the 18 patients with polyps and nodules had significant improvement and avoided surgery. Vocal fold scars improved after injection with an improved voice grade (P < .01), an improved amplitude (P < .05), and improved mucosal wave (P < .05). There were no complications. Only two patients could not tolerate office injection. CONCLUSION: Office steroid injections are a valuable adjunct in management of vocal fold scars, polyps, nodules, and granulomas.

Anti-Inflammatory Agents↗