Pharyngeal Effects of Bolus Volume, Viscosity, and Temperature in Patients With Dysphagia Resulting From Neurologic Impairment and in Normal Subjects The oropharyngeal swallow of 10 patients with mild dysphagia at 3 weeks after a cerebrovascular accident (stroke), 10 normal subjects, and 8 neurologically impaired patients with moderate to severe dysphagia was studied videofluorographically to examine the effects of 2 bolus temperatures (room temperature and 33°F), 2 volumes, and 2 viscosities ... Research Article
Research Article  |   October 01, 1994
Pharyngeal Effects of Bolus Volume, Viscosity, and Temperature in Patients With Dysphagia Resulting From Neurologic Impairment and in Normal Subjects
 
Author Affiliations & Notes
  • Elizabeth M. Bisch
    Communication Sciences and Disorders, Northwestern University Evanston, IL Lakeside and Veterans Administration Hospital Chicago, IL
  • Jeri A. Logemann
    Communication Sciences and Disorders, Northwestern University Evanston, IL Lakeside and Veterans Administration Hospital Chicago, IL
  • Alfred W. Rademaker
    Lurie Cancer Center Biometry Section, Northwestern University, Chicago, IL
  • Peter J. Kahrilas
    Department of Medicine, Northwestern University, Chicago, IL
  • Cathy L. Lazarus
    Communication Sciences and Disorders, Northwestern University, Evanston, IL
  • Contact author: Jeri A. Logemann, PhD, Department of Communication Sciences and Disorders, Northwestern University, 2299 North Campus Drive, Evanston, IL 60208-3540.
Article Information
Swallowing, Dysphagia & Feeding Disorders / Special Populations / Speech / Research Articles
Research Article   |   October 01, 1994
Pharyngeal Effects of Bolus Volume, Viscosity, and Temperature in Patients With Dysphagia Resulting From Neurologic Impairment and in Normal Subjects
Journal of Speech, Language, and Hearing Research, October 1994, Vol. 37, 1041-1049. doi:10.1044/jshr.3705.1041
History: Received October 21, 1993 , Accepted April 26, 1994
 
Journal of Speech, Language, and Hearing Research, October 1994, Vol. 37, 1041-1049. doi:10.1044/jshr.3705.1041
History: Received October 21, 1993; Accepted April 26, 1994

The oropharyngeal swallow of 10 patients with mild dysphagia at 3 weeks after a cerebrovascular accident (stroke), 10 normal subjects, and 8 neurologically impaired patients with moderate to severe dysphagia was studied videofluorographically to examine the effects of 2 bolus temperatures (room temperature and 33°F), 2 volumes, and 2 viscosities on the durations of pharyngeal stage swallow events and the frequency and nature of oropharyngeal swallowing problems and bolus transit. Normal subjects exhibited significantly longer pharyngeal response times and longer laryngeal elevation only for 1 ml cold liquid. The stroke patients and the 8 significantly dysphagic neurologically impaired patients exhibited very few significant effects of temperature on swallowing disorders or swallow measures. Increases in bolus volume and viscosity decreased pharyngeal delay times in both neurologically impaired patient groups. Stroke patients exhibited significantly longer pharyngeal delay times but shorter pharyngeal response times, laryngeal closure, cricopharyngeal opening, and laryngeal elevation than normal subjects on some bolus volumes and viscosities. Results are discussed in terms of the potentially therapeutic effects of bolus volume and viscosity.

Acknowledgment
This research was supported by NIH grants 1R01 NS28525 and 1R01 DC00550 and P01CA40007.
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