Korean J Otorhinolaryngol-Head Neck Surg.  2017 Sep;60(9):454-462. 10.3342/kjorl-hns.2017.00213.

Acoustic Voice Analysis in Patients with Penetration/Aspiration Via Videofluoroscopic Swallowing Study

• Kang YA
• Jee SJ
• Koo BS

• KMID: 2392970
• DOI: http://doi.org/10.3342/kjorl-hns.2017.00213

Abstract

BACKGROUND AND OBJECTIVES
The present study aimed to investigate the effects of penetration/aspiration (P/A) on voice acoustic parameters.
SUBJECTS AND METHOD
Twenty-seven patients were analyzed with the videofluoroscopic swallowing study (VFSS) and then divided into two groups based on the modified Penetration and Aspiration Scale results. Ten patients (5 males and 5 females) were included in the Non-P/A group, and 17 patients (12 males and 5 females) in the P/A group. Stroke was the major cause of swallowing disorders. Three sustained /a/ vowels recorded in pre- and post-VFSS were analyzed. Mann-Whitney U-test was used to compare acoustic values before and after VFSS, and the receiver operating characteristics (ROC) curve with combination of significant parameters was also conducted.
RESULTS
Among acoustic parameters, the length of analyzed sample (p=0.010), number of segments computed (p=0.018), total number detected pitch periods (p=0.017), and second formant (p=0.013) in pre- and post-VFSS were significantly different between Non-P/A and P/A groups. In the P/A group after VFSS, the means of these significant parameters decreased. According to ROC combined with four significant parameters, the probability of predicting P/A condition was 84% (p=0.005), the sensitivity was 80%, and the specificity was 80%.
CONCLUSION
Voice acoustic analysis can reflect voice changes by penetration/aspiration and the combination of significant parameters can also detect swallowing disorders. Therefore, voice analysis can be a reliable screening tool for patients with swallowing disorders.

Keyword

Acoustic analysis; Aspiration; Penetration; Swallowing disorders; Videofluoroscopic swallowing study

MeSH Terms

Acoustics*
Deglutition Disorders
Deglutition*
Humans
Male
Mass Screening
Methods
ROC Curve
Sensitivity and Specificity
Stroke
Voice*