Diagnostic Procedures and Instruments Used in the Assessment and Treatment of Speech
Several instrumental procedures are available for assessing the velopharyngeal mechanism and its function. Each has advantages and disadvantages, and choosing among them depends on the specific purpose of the evaluation. The reliability of endoscopic procedures is not well documented.
Aerodynamic measures provide data about the area of the velopharyngeal opening, velopharyngeal resistance to air flow, and air pressure available for the production of obstruent sounds. These measures provide no information about the relative contributions of the velum and the pharyngeal walls to velopharyngeal function.
An important warning in the use of any instrumentation for the study of speech is that data taken during speech production must be interpreted within the context of the patient’s repertoire of speech proficiency.
KeywordsSoft Palate Cleft Palate Vocal Tract Lateral Pharyngeal Wall Velopharyngeal Closure
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- 1.King EW. A roentgenographic study of pharyngeal growth. Angle Orthod 1952; 22:23.Google Scholar
- 2.Rosenberger HC. Growth and development of the nasorespiratory area in childhood. Ann Otol Rhinol Laryngol 1934; 43:495.Google Scholar
- 4.Subtelny JD, Baker HK. The significance of adenoid tissue in velopharyngeal function. Au Journal 1956; 17:235.Google Scholar
- 5.Brader AA. A cephalometric appraisal of morphologic variations in cranial base and associated pharyngeal structures: implications in cleft palate therapy. Angle Orthod 1957; 27:179.Google Scholar
- 7.Ricketts RM. The cranial base and soft structures in cleft palate speech and breathing. Plast Reconstr Surg 1954; 14:74.Google Scholar
- 10.McWillams BJ, Girdny B. The use of Televex in cleft palate research. Cleft Palate J 1965; 2:46.Google Scholar
- 14.Hawkins CF, Swisher WE. Evaluation of real-time ultrasound scanner in assessing lateral pharyngeal wave motion during speech. Cleft Palate J 1978; 15:161.Google Scholar
- 15.McWilliams BJ, Morris HS, Shelton RL, (eds.) Instruments for assessing velopharyngeal mechanisms in cleft palate speech. St. Louis, MO: CV Mosby; 1984.Google Scholar
- 18.Warren DW, DuBois AB. A pressure-flow technique for measuring velopharyngeal orifice area during continuous speech. Cleft Palate J 1964; 1:52–71.Google Scholar