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Dysphagia
Published in: Dysphagia 1/2013

Open Access 01-03-2013 | Original Article

Noninvasive Detection of Thin-Liquid Aspiration Using Dual-Axis Swallowing Accelerometry

Authors: Catriona M. Steele, Ervin Sejdić, Tom Chau

Published in: Dysphagia | Issue 1/2013

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Abstract

Aspiration (the entry of foreign contents into the upper airway) is a serious concern for individuals with dysphagia and can lead to pneumonia. However, overt signs of aspiration, such as cough, are not always present, making noninstrumental diagnosis challenging. Valid, reliable tools for detecting aspiration during clinical screening and assessment are needed. In this study we investigated the validity of a noninvasive accelerometry signal-processing classifier for detecting aspiration. Dual-axis cervical accelerometry signals were collected from 40 adults on thin-liquid swallowing tasks during videofluoroscopic swallowing examinations. Signal-processing algorithms were used to remove known sources of artifact and a classifier was trained to identify signals associated with penetration-aspiration. Validity was measured in comparison to blinded ratings of penetration-aspiration from the concurrently recorded videofluoroscopies. On a bolus-by-bolus basis, the accelerometry classifier had a 10 % false-negative rate (90 % sensitivity) and a 23 % false-positive rate (77 % specificity) for detecting penetration-aspiration. We conclude that accelerometry can be used to support valid, reliable, and efficient detection of aspiration risk in patients with suspected dysphagia.
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Metadata
Title
Noninvasive Detection of Thin-Liquid Aspiration Using Dual-Axis Swallowing Accelerometry
Authors
Catriona M. Steele
Ervin Sejdić
Tom Chau
Publication date
01-03-2013
Publisher
Springer-Verlag
Published in
Dysphagia / Issue 1/2013
Print ISSN: 0179-051X
Electronic ISSN: 1432-0460
DOI
https://doi.org/10.1007/s00455-012-9418-9

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