Pharyngeal transit time: assessment with videofluoroscopic and scintigraphic techniques

Area of Science:

• Medical Imaging
• Gastroenterology
• Speech-Language Pathology

Background:

• Dysphagia, or difficulty swallowing, affects individuals across a wide age range.
• Accurate assessment of pharyngeal transit time is crucial for diagnosing and managing swallowing disorders.
• Videofluoroscopy and scintigraphy are established imaging techniques used in swallowing evaluations.

Purpose of the Study:

• To compare the pharyngeal transit times measured by videofluoroscopy and scintigraphy.
• To determine the correlation between these two imaging modalities in assessing swallowing function.
• To establish normal pharyngeal transit time values using both techniques.

Main Methods:

• 31 participants (normal and dysphagic, aged 39-79) underwent swallowing assessments.
• Videofluoroscopy and scintigraphy were utilized to capture pharyngeal transit.
• Pharyngeal transit times were recorded and statistically analyzed for comparison.

Main Results:

• A statistically significant correlation (0.66) was observed between videofluoroscopy and scintigraphy for pharyngeal transit times.
• Normal pharyngeal transit time was determined to be under 1.2 seconds with both methods.
• Mean pharyngeal transit times were slightly longer when measured by scintigraphy compared to videofluoroscopy.

Conclusions:

• Videofluoroscopy and scintigraphy are reliable and correlated methods for assessing pharyngeal transit time.
• The findings support the use of either technique for evaluating swallowing function.
• Slight differences in mean transit times warrant consideration in clinical interpretation.