EN
Speech reception is a perceptual phenomenon. Hence in the assessment of cleft palate speech its auditory evaluation is a basic golden standard with respect to identification of speech disorder and defining the degree of its intensity. Yet auditory evaluation does not provide information about the cause of this disorder. And here, with a good knowledge of the cleft palate issues and perfect skills in using the endoscopic technique, nasofiberoscopy, i.e. endoscopy using flexible optics, is irreplaceable. It enables direct visualization of the velopharyngeal sphincter at rest and during speech, allowing the simultaneous assessment of its structure and function. It also allows simultaneous endoscopic evaluation of other elements of the vocal tract that exert a direct effect on speech resonance. Thus it has fundamental significance for the choice of the treatment procedures and for the evaluation of the successive stages of treatment and rehabilitation.