This study examined the relationship between velopharyngeal function evaluated using the Japanese Scale for Assessment of Cleft Palate Speech and velopharyngeal gap size evaluated using nasoendoscopic examinations or/and lateral cephalometric analysis. The subjects were 48 patients with a repaired cleft lip and palate. Forty patients had a cleft lip, alveolus, and palate, and 8 had an isolated cleft palate. They were suspected of having velopharyngeal inadequacy and were evaluated at the age of 4-7 years old from 2007 to 2013. All the patients with a cleft lip, alveolus, and palate had not undergone alveolar bone grafting. Velopharyngeal function was judged using the Japanese Scale for Assessment of Cleft Palate Speech on a 4-point scale: good, slightly impaired, marginally impaired, severely impaired. If the patients could not be judged according to this scale, they were classified as “pending judgment.” Gap size was assessed using the following 4-point scale: none, small, medium, large. Agreement between the 4-point scales of velopharyngeal function and gap size was determined using the weighted Kappa statistic.
The results were as follows:
1. Of the 48 patients, 29 (60.4%) could be judged according to the 4-point scale of the Japanese Scale for Assessment of Cleft Palate Speech; 19 (39.6%) were classified as “pending judgment” and all had an unrepaired cleft alveolus.
2. The level of agreement between velopharyngeal function evaluated using the Japanese Scale for Assessment of Cleft Palate Speech and velopharyngeal gap size evaluated using nasoendoscopy or/and lateral cephalometric analysis was interpreted as moderate and good, respectively.
3. Some patients whose velopharyngeal function was judged “good” showed small gaps on nasoendoscopic examinations. These patients showed no gaps on lateral cephalometric analysis; however, they had nasal snort.
4. Two experienced listeners separately analyzed audio speech samples. An evaluation of inter-rater reliability using the weighted Kappa statistic was performed. The agreement level was interpreted as moderate for hypernasality and good for nasal emission.
5. Nasal snort treatment, blowing examination and the relationship between “pending judgment” using the Japanese Scale for Assessment of Cleft Palate Speech and size of cleft alveolus and fistulas are some issues that require further investigation.
View full abstract