Quantitative Analysis of Temporal Parameters Correlated with Aspiration and Lesion Location in Stroke Patients.
Jeong Min Kim, Ji Eun Park, Seung Jun Baek and 1 others
PMID 37072634WHAT IT FOUND
In stroke patients, longer laryngeal closure duration was linked to aspiration, but this association was borderline in the final model.
Lesion location changed swallowing timing: supratentorial strokes had longer oral phases, while infratentorial strokes had longer upper sphincter opening.
Key findings
01Three temporal parameters were significantly prolonged in the aspiration group compared to the non-aspiration group: pharyngeal response time, laryngeal vestibule closure duration, and upper esophageal sphincter opening duration.
02When adjusting for other factors, only laryngeal vestibule closure duration remained associated with aspiration, though the result was borderline significant.
03Oral phase duration was significantly longer in patients with supratentorial or combined lesions compared to those with infratentorial lesions.
04Upper esophageal sphincter opening duration was longest in the infratentorial lesion group.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The study had a very small number of patients in the aspiration group (7 out of 91), which limits the reliability of the statistical models. Patients with severe upper esophageal sphincter dysfunction were excluded, meaning the results do not apply to the most impaired swallowing profiles. The use of 15 frames per second for video analysis is lower than the standard 30 frames per second, which may have reduced the accuracy of timing measurements. Only the first subswallow of a single thin liquid volume was analyzed, ignoring potential worsening of aspiration in later swallows or with different consistencies. There was no non-stroke control group for comparison.
Declared interests
The authors declared no conflicts of interest. The study was supported by the Institute for Information and Communications Technology Promotion.
The easy way to misread this
Do not use these temporal parameters to definitively predict aspiration risk or diagnose lesion location in individual patients. The association with aspiration was borderline in the final model, and the study excluded patients with severe dysfunction, so these patterns may not apply to your most complex cases.