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Related Experiment Video

Updated: Jul 4, 2026

Gastric Point of Care Ultrasound in Adults: Image Acquisition and Interpretation

Gastric Point of Care Ultrasound in Adults: Image Acquisition and Interpretation

Published on: September 22, 2023

Screening test for silent aspiration at the bedside.

Yoko Wakasugi¹, Haruka Tohara, Fumiko Hattori

¹Department of Gerodontology, Division of Gerontology and Gerodontology, Graduate School, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo, Tokyo, 113-8549, Japan. wakasugi_y@yahoo.co.jp

|July 3, 2008

Summary

A new cough test effectively screens for silent aspiration (SA) in dysphagia patients. Combining it with the modified water swallowing test (MWST) creates a reliable bedside system for identifying aspiration risks.

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Gastric Point of Care Ultrasound in Adults: Image Acquisition and Interpretation

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Area of Science:

Clinical Medicine
Otolaryngology
Gastroenterology

Background:

Bedside screening tests for dysphagia exist but lack accuracy for detecting silent aspiration (SA).
Accurate identification of SA is crucial for preventing complications associated with swallowing difficulties.

Purpose of the Study:

To evaluate the efficacy of a cough test for screening SA.
To develop and validate an accurate screening system for SA by combining the cough test with the modified water swallowing test (MWST).

Main Methods:

A cohort of 204 patients with suspected dysphagia underwent a cough test and instrumental assessment (videofluorography or videoendoscopy).
A subset of 107 patients also completed the MWST.
Sensitivity and specificity of the cough test for SA detection were calculated.

Main Results:

The cough test demonstrated high sensitivity (0.87) and specificity (0.89) for detecting SA.
The combined screening system (cough test + MWST) showed good agreement with instrumental assessments in classifying patients' swallowing safety.
The system accurately differentiated between patients safe for swallowing and those with SA.

Conclusions:

The cough test is a valuable tool for screening silent aspiration in dysphagia patients.
A screening system integrating the MWST and cough test offers an accurate and practical method for bedside assessment of aspiration risk.