Clinical Application of the High-Resolution Frequency Analyzer

Remacle, Marc; Millet, B.; Heule, P. van; D, Duvivier

doi:10.1159/000265977

Cited by 13 publications

(6 citation statements)

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“…The minimum assessment included the maximum phonation time (MPT) (normal range 20-25 s); the phonation quotient (PQ), i.e. the quotient obtained by dividing the vital capacity by the MPT (normal range 150-200 ml/s); the modal intensity (dB); the intensity range (dB); the fundamental frequency (F o ); and the voice spectral analysis, conforming to our proposed classification (range 0-4) [26] (Table 1).…”

Section: Methodsmentioning

confidence: 98%

Medialization framework surgery for voice improvement after endoscopic cordectomy

Ramacle¹,

Lawson²,

Abbastabar³

et al. 2001

European Archives of Oto-Rhino-Laryngology

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Seven dysphonic patients who had previously undergone total or extended cordectomy underwent laryngeal framework medialization. A minimum 6-month period between cordectomy and framework surgery was enforced to allow the vocal cord to scar and form a fibrous "neocord", to evaluate the voice recovery achieved by speech therapy alone and avoid the risk of operating on a patient with undiagnosed early recurrence. The operation is performed with fiberscopic control under general anesthesia. These operating conditions are required because undermining the fibrous tissue at the inner side of the thyroid ala is a lengthy and laborious procedure. This step is necessary to ensure easy placement of the implant. Caution must be taken to avoid tearing the fibrous tissue, with consequent risk of prosthesis extrusion. The cartilage window is left intact. Whereas cartilage implants remain indicated for minor gaps, we advocate Friedrich's implant for wider gaps. The vocal outcome revealed an increased median maximum phonation time from 5 s (range 2-12 s) to 7.5 s (range 3-23 s); a reduced phonation quotient from 516.5 ml/s (range 235-1000 ml/s) to 222 ml/s (range 146-595 ml/s); a slightly increased modal intensity from 61.5 dB (range 57-75 dB) to 67 dB (range 46-68 dB); an improved intensity range from 24.5 dB (range 16-36 dB) to 30 dB (range 16-62 dB); a steady fundamental frequency from 150 Hz (range 132-290) to 152 Hz (range 125-200); and an increased median spectral analysis class from 2 (range 1-3) to 3 (range 2-4). Subjectively, the patients noted that, throughout the day, phonation required less effort and induced less vocal fatigue.

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Section: Methodsmentioning

confidence: 98%

Medialization framework surgery for voice improvement after endoscopic cordectomy

Ramacle¹,

Lawson²,

Abbastabar³

et al. 2001

European Archives of Oto-Rhino-Laryngology

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“…The affected vocal folds were atrophie and bowed. According to the functional voice assessments (Table 2 10 • 15 ) and the position of the paralyzed vocal fold, a satisfactory recovery was not expected with speech therapy alone. The preoperative and postoperative assessments were based on videostroboscopy as well as on data provided by the EVA (French acronym for Assisted Voice Evaluation) analyzer (National Center for Scientific Research [CNRS], Aix-en-Provence, France).…”

Section: Methodsmentioning

confidence: 98%

Correcting Vocal Fold Immobility by Autologous Collagen Injection for Voice Rehabilitation

Remacle

Lawson

Delos

et al. 1999

Ann Otol Rhinol Laryngol

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We report on a short-term clinical study of injectable autologous collagen (Vocalogen) used to correct dysphonias arising from vocal fold immobility. The collagen is extracted from skin taken from the lower abdominal quadrant area or from just above the bikini line. About 30 cm2 of skin are required to provide 2 mL of injectable collagen. The histologic examination of the preparation before injection disclosed the presence of elastin fibers and some clusters of epithelial cells, beside the collagen fibers. The collagen is naturally reticulated, and the molecule is preserved in its entirety. The technique is exactly the same as that reported for bovine collagen: injection into Reinke's space, under general anesthesia, monitored by direct microlaryngoscopy. The amount injected is also similar: 1.5 mL for correction of glottic insufficiency in which the immobile vocal fold is in the intermediate position. Eight patients were injected, and the average follow-up was 4.5 months. Voice assessments made before and after the treatment included stroboscopy, subjective and perceptual judgments, and aerodynamic and acoustic measurements. The functional results were similar to those obtained with bovine collagen. No complications arose. The probability of any hypersensitivity reaction, always a possibility to be feared with bovine collagen, is negligible with the autologous collagen. Long-term results are as yet unknown, but from the fact that the collagen molecular structure is intact and there is little risk of foreign body response, it would be expected that autologous preparations would be more stable than bovine collagen; this appears to be the case in cosmetic applications. Autologous collagen could be employed for the same indications as bovine collagen, provided that a delay of 45 days (the time required to prepare the injectable collagen) is acceptable. The amount of collagen required is also a limiting factor, since the patient's own skin is the starting donor material.

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“…Vocal results were evaluated by high-resolution frequency analysis with a Bruel and Kjaer 2033 analyser (Naerum, Denmark) according to criteria already defined (Remade et al, 1989). Analysis of the vocal frequency was recorded in the form of a histogram of intensity as a function of frequency.…”

Section: Methodsmentioning

confidence: 99%

CO₂and KTP-532 laser cordectomy for bilateral vocal fold paralysis

et al. 1999

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Laryngeal obstruction due to bilateral vocal fold paralysis has been treated in many different ways. The CO2 laser or KTP-532 laser endoscopic cordectomy described in this report is a slight modification of the posterior partial cordectomy proposed by Dennis and Kashima. This technique was used in 18 patients (14 with the CO2 and four with the KTP-532 laser). Prophylactic tracheostomy was performed preoperatively. Post-operative results were excellent in nine cases, good in seven cases and poor in two cases who had to remain with a permanent tracheostomy tube with a speaking valve. The main complications noted were the formation of a granuloma (seven cases) and arytenoid oedema (six cases). Revision surgery was performed in the seven cases with granuloma formation and in the two with persistent oedema. The results and the post-operative findings from the use of the two lasers were similar.

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Clinical Application of the High-Resolution Frequency Analyzer

Cited by 13 publications

References 0 publications

Medialization framework surgery for voice improvement after endoscopic cordectomy

Medialization framework surgery for voice improvement after endoscopic cordectomy

Correcting Vocal Fold Immobility by Autologous Collagen Injection for Voice Rehabilitation

CO₂and KTP-532 laser cordectomy for bilateral vocal fold paralysis

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Clinical Application of the High-Resolution Frequency Analyzer

Cited by 13 publications

References 0 publications

Medialization framework surgery for voice improvement after endoscopic cordectomy

Medialization framework surgery for voice improvement after endoscopic cordectomy

Correcting Vocal Fold Immobility by Autologous Collagen Injection for Voice Rehabilitation

CO2and KTP-532 laser cordectomy for bilateral vocal fold paralysis

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Product

Resources

About

CO₂and KTP-532 laser cordectomy for bilateral vocal fold paralysis