Comparison of Two Methods for Inducing Reflex Cough in Patients With Parkinson's Disease, With and Without Dysphagia.

Abstract:

:Aspiration pneumonia is a common cause of death in people with Parkinson's disease (PD). Dysfunctional swallowing occurs in the majority of people with PD, and research has shown that cough function is also impaired. Previous studies suggest that testing reflex cough by having participants inhale a cough-inducing stimulus through a nebulizer may be a reliable indicator of swallowing dysfunction, or dysphagia. The primary goal of this study was to determine the cough response to two different cough-inducing stimuli in people with and without PD. The second goal of this study was to compare the cough response to the two different stimuli in people with PD, with and without swallowing dysfunction. Seventy adults (49 healthy and 21 with PD) participated in the study. Aerosolized water (fog) and 200 μM capsaicin were used to induce cough. Each substance was placed in a small, hand-held nebulizer, and presented to the participant. Each cough stimulus was presented three times. The total number of coughs produced to each stimulus trial was recorded. All participants coughed more to capsaicin versus fog (p < 0.001). A categorical 'responder' and 'non-responder' variable for the fog stimulus, defined as whether or not the participant coughed at least two times to two of three presentations of the stimulus, yields sensitivity of 77.8 % and a specificity of 90.9 % for identifying PD participants with and without dysphagia. The data show a differential response of the PD participants to the capsaicin versus fog stimuli. Clinically, this finding may allow for earlier identification of people with PD who are in need of a swallowing evaluation. As well, there are implications for the neural control of cough in this patient population.

journal_name

Dysphagia

journal_title

Dysphagia

authors

Hegland KW,Troche MS,Brandimore A,Okun MS,Davenport PW

doi

10.1007/s00455-015-9659-5

subject

Has Abstract

pub_date

2016-02-01 00:00:00

pages

66-73

issue

1

eissn

0179-051X

issn

1432-0460

pii

10.1007/s00455-015-9659-5

journal_volume

31

pub_type

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