The Relationship Between Lesion Localization and Dysphagia in Acute Stroke.

Factors that can facilitate early identification of individuals at risk of dysphagia such as stroke location are potentially of great benefit. The aim of this study was to examine the role of hemisphere and lesion location in assessing dysphagia pattern and airway invasion as identified through the use of validated, standardized interpretation measures for the videofluoroscopic swallowing study. Consecutive patients (N = 80) presenting with stroke symptoms who had a first-time acute ischemic stroke confirmed on diffusion-weighted magnetic resonance imaging (DW-MRI) scan participated. Three swallowing outcome variables were assessed using regression models: modified barium swallow impairment profile (MBSImP) oral impairment (OI) and pharyngeal impairment (PI) scores and penetration aspiration scale (PAS) score. Subjects were primarily male and demonstrated mild stroke and mild to moderate dysphagia. There was a significantly higher likelihood of abnormal PAS scores for infratentorial lesions compared to right hemisphere location (Odds ratio: 3.1, SE: 1.8, p = 0.046) and for Whites compared to African Americans (Odds ratio: 5.5, SE: 2.6, p = <0.001). However, OI scores were higher (worse) in African Americans compared to Whites (Beta = -1.2; SE: 0.56; p = 0.037). PI scores had no significant association with race or lesion location. Using DW-MRI to identify infratentorial stroke can help identify individuals at risk of airway invasion; however, imaging information concerning supratentorial infarct hemisphere and location may not be useful to predict which individuals with mild stroke are at risk for dysphagia and aspiration when admitted with acute stroke symptoms. Future studies should explore the role of race in the development of stroke-related dysphagia.

Speech Pathology Reliability for Stroke Swallowing Screening Items.

Swallowing screening is critical in rapid identification of risk of aspiration in patients presenting with acute stroke symptoms. Accuracy in judgments is vital for the success of the screening. This study examined speech-language pathologists' (SLPs) reliability in interpreting screening items. Swallowing screening was completed in 75 individuals admitted with stroke symptoms. Screening items evaluated were lethargy, dysarthria, wet voice unrelated to swallowing, abnormal volitional cough, and cough, throat clear, wet voice after swallowing, and inability to continuously drink with ingestion of 5 and 90 ml water. Two SLPs, each with more than 10 years of experience, made simultaneous independent judgments of the same observations obtained from the screening. Overall, generally high agreement was identified between the SLPs (k[SE] = 0.83[0.03]). Individual kappas ranged from 0.38 (fair) for non-swallowing wet voice to 0.95 (almost perfect) for cough after swallow, with one item omitted due to minimal variation. SLPs demonstrate high reliability in swallowing screening. Results, however, indicate some potential variability. Items associated with trial swallows had the highest reliability, whereas items related to judgments of speech and voice quality had the lowest. Although SLPs have dedicated training and ample opportunity to practice, differences in agreement are evident. Routine practice in hospital departments is recommended to establish and maintain sensitive perceptual discrimination. If other professionals are to provide swallowing screening, knowledge of SLPs' reliability levels must be considered when identifying screening items, creating education modules, and determining acceptable levels of agreement.