Faculty Collaboration Database

Correlation of glottal closure using concurrent ultrasonography and nasolaryngoscopy in children: a novel approach to evaluate glottal status. Dysphagia 2006 Jan;21(1):75-81

Date

06/21/2006

Pubmed ID

16786412

Pubmed Central ID

PMC4028689

DOI

10.1007/s00455-005-9002-7

Scopus ID

2-s2.0-33744970579 (requires institutional sign-in at Scopus site)   38 Citations

Abstract

OBJECTIVES: Endoscopic procedures to assess aerodigestive symptoms by evaluating glottal motion are not practical in neonates because of small nares, respiratory difficulties, or additional stress. Our objective was to determine the temporal correlation between concurrent nasolaryngoscopy (NLS) and ultrasonography (USG) evaluation of glottal motion.

METHODS: Simultaneous USG of the glottis was performed in 10 subjects (5 males, 5 females, age = 4.5 months to 7.1 years) that underwent diagnostic flexible outpatient NLS. The USG transducer was placed on the anterior neck at the level of the vocal cords. The video signals from NLS and USG were integrated and synchronized into real-time cine loops of 1-min duration.

RESULTS: Frame-by-frame evaluation of 10,800 frames identifying glottal opening and closure time was compared between the two modalities by three observers and the timing of glottal closure was marked. Two investigators, blinded to NLS images, identified ultrasonographically determined glottal closure with 99% and 100% accuracy, and the mean probability of missing a closure frame was 0.007 (95% CI = 0.0008-0.024).

CONCLUSIONS: Temporal characteristics of glottal motion can be quantified by USG with perfect reliability and safety. This method can be useful in measuring the presence and the duration of laryngeal adduction.

Author List

Jadcherla SR, Gupta A, Stoner E, Coley BD, Wiet GJ, Shaker R

Author

Reza Shaker MD Assoc Provost, Sr Assoc Dean, Ctr Dir, Chief, Prof in the Medicine department at Medical College of Wisconsin

MESH terms used to index this publication - Major topics in bold

Child
Child, Preschool
Confidence Intervals
Deglutition
Female
Glottis
Humans
Infant
Laryngoscopy
Male
Phonation
Reproducibility of Results
Time Factors
Ultrasonography
Vocal Cords
Voice Quality