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Acoustic analysis of swallowing sounds: A new technique for assessing dysphagia
Journal of Rehabilitation Medicine, 07/02/09
Santamato A et al. – The proposed technique for recording and measuring swallowing sounds may be incorporated into bedside evaluation but should not replace use of more diagnostic and valuable measures.
Methods- Acoustic analysis of swallowing sounds, using microphone and notebook computer system, in healthy subjects and dysphagia pts with neurologic diseases
- Test of positive/negative predictive value of a pathologic pattern of swallowing sounds for penetration/aspiration
- Diagnostic test study, prospective, not blinded, with penetration/aspiration evaluated by fiberoptic endoscopy of swallowing as criterion standard
- Comparison of data from previously recorded database of normal swallowing sounds for 60 healthy subjects by gender, age, and bolus consistency vs 15 dysphagia pts from a university hospital referral center with various neurologic diseases
- Recording of mean duration of the swallowing sounds and post-swallowing apnea
- Fiberoptic endoscopy of swallowing to verify penetration/aspiration in all dysphagia pts
- Significantly different mean duration of swallowing sounds for liquid bolus of 10 mL water between dysphagia pts vs healthy pts
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