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[Systematic investigation technique in videolaryngoscopy and stroboscopy].
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[Flexible versus rigid laryngoscopy and stroboscopy. Differential findings in voice disorders].
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The evaluation of benign glottic lesions: rigid telescopic stroboscopy versus suspension microlaryngoscopy.
Rigid telescopic strobo-video-laryngoscopy (RTS) is a primary clinical assessment methodology in the office evaluation of benign glottic lesions. However, diagnostic observations can be made only at the time of suspension microlaryngoscopy (SML). The records of 100 consecutive patients undergoing microlaryngoscopy for benign glottic lesions were retrospectively reviewed. Nine of 100 patients were found to have additional glottic lesions during SML. Sixteen additional lesions were noted in these nine patients. Fifteen of 16 lesions were sulci and/or mucosal bridges. Forty-five percent (4/9) of the patients with additional lesions underwent a management change intraoperatively. Three patients underwent additional surgical dissection, and one underwent less dissection than was planned. The discrepancy in diagnosis between rigid telescopic strobo-video-laryngoscopy and suspension microlaryngoscopy highlights certain key points: (1) During office endoscopy, tangential views of the medial surface of the glottis limit the diagnostic sensitivity. (2) Sulci and mucosal bridges are most subject to this limitation. (3) Informed consent should address the potential need for a change in intraoperative management. It is advisable to discuss the possibility for dissection in both vocal folds, even if a unilateral lesion is observed in the office. (4) Microlaryngoscopy is the final diagnostic step in the evaluation of glottic pathology. Meticulous inspection and palpation of the glottis are recommended during SML.
Electroglottography compared with synchronized stroboscopy in normal persons.
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Synchronization of glottography and laryngeal stroboscopy.
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[Video-laryngo-stroboscopy in diagnosis of senile voice disorders].
Clinical applications of videolaryngostroboscopy (VLSS) in 110 senile persons in phoniatrics was investigated. Each patient was examined laryngologically and phoniatrically. The patients were divided into two groups, according to the changes observed in the larynx as edema and vocal folds atrophy. Measurements of vibration, amplitudae, frequency glottic closure and oscillation (mucosal wave) of vocal cords yielded objective information about vibration in edema and vocal fold atrophy. This method can find application in training and therapeutic procedures in patients with senile dysphonia.
[Laser stroboscopy and software tests in the evaluation of visual performance in dispatchers and pilots of civil aviation].
The article deals with original methods of ophthalmic ergonomic diagnosis based on laser speckles. The authors suggest some software methods to examine visual performance.
[Usefulness of video-laryngo-stroboscopy in the diagnosis of laryngeal pathology].
The observation of the glottis and the vocal fold mobility during phonation enables the diagnosis of larynx pathology. Videolaryngostroboscopy (VLSS) facilitates acquiring a precise endoscopic picture and an evaluation of the vocal fold vibratory movements. This method is recognised as an objective, repetitive and non-invasive approach to accelerate early diagnosis in laryngeal carcinoma, vocal nodules, vocal fold paresis, larynx oedema, functional dysphonia and presbyphonia. The mucosal wave is a particularly important parameter in the stroboscopic examination. The absence of mucosal wave indicates microinfiltrations in the T1 stage of glottic carcinoma and vocal hard nodules, the complete form of paretic dysphonia and the severe form of atrophic presbyphonia. The recurrent mucosal wave suggests re-innervation in the paretic dysphonia. Aberrations in the vocal fold vibrations indicate a supraepithelial oedema of the laryngeal mucosa and a functional type of dysphonia, requiring differential therapy. The larynx image recorded on a video tape is a valuable diagnostic evidence that allows monitoring of therapeutic effects and phoniatric rehabilitation.
[Diagnostic value of stroboscopy in early glottic carcinoma].
Stroboscopic evaluation was conducted on 34 cases with glottic T1 carcinomas, and the relationship was studied between the area, thickness and volume of the lesion and the amplitude as well as mucosal wave of vibration. In all cases the mucosal wave of the lesion (WAVL) was abolished. The amplitude of the lesion (AMPL) was decreased in 17 and abolished in another 17 cases. There were significant relationship between the area of the lesion and the mucosal wave of the entire vocal fold (WAVE), the thickness of the lesion and AMPL, and the volume of the lesion and WAVE, AMPL, and the amplitude of the entire vocal fold (AMPE). The present paper suggested that if WAVL is reserved, the lesion is not invasive carcinoma, nor is it if any one of AMPE, AMPL, WAVE or WAVL is normal (except for lesions confined to the cartigenous vocal fold).
The value of varying vocal frequency during stroboscopy for vocal fold masses.
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[Usefulness of laryngeal stroboscopy].
The extended use of optic fibers and TV cameras and videos make easier the stroboscopic exploration of the vocal folds. The ENT surgeons must stress the use of this unique method which allows us the study of the laryngeal voice function. This exploration is based on a fictional slow motion movement of the vocal fold that lets us see the mucosal wave. The most useful clinical implications of the laryngeal stroboscopic study are: phonatory function, differential diagnosis between benign and malignant lesions and laryngeal paresis.
[Biomechanical analysis of movement using stroboscopy].
In cases when violence has occurred in some form and its associated forces are subject to expert evaluation. For a mathematical assessment of the intensity of the acting forces there is often a lack of confident basis data, which is why an experimental study is necessary. A simple testing arrangement with a photocamera and flashlight in stroboscopic mode provides a convincing pictorial representation of movement and velocity. The method is described with some examples of applications by experts.
[Measuring vibrations of the vocal cords: on the clinical relevance of stroboscopy].
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[Laryngeal stroboscopy using a scanning microphone].
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[Stroboscopy in malignant tumors of the larynx in the post-radiation period].
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[Stroboscopy in hyperplastic and tumorous processes of the larynx].
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