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Measurement of the Maximum Frequency of Electroglottographic Fluctuations in the Expiration Phase of Volitional Cough as a Functional Test for Cough Efficiency

AbstractThe hypotheses of the present study were that the maximum frequency of fluctuation of electroglottographic (EGG) signals in the expiration phase of volitional cough (VC) reflects the cough efficiency and that this EGG parameter is affected by impaired laryngeal closure, expiratory effort strength, and gender. For 20 normal healthy adults and 20 patients diagnosed with unilateral vocal fold paralysis (UVFP), each participant was fitted with EGG electrodes on the neck, had a transnasal laryngo-fiberscope inserted, and was asked to perform weak/strong VC tasks while EGG signals and a high-speed digital image of the larynx were recorded. The maximum frequency was calculated in the EGG fluctuation region coinciding with vigorous vocal fold vibration in the laryngeal HSDIs. In addition, each participant underwent spirometry for measurement of three aerodynamic parameters, including peak expiratory air flow (PEAF), during weak/strong VC tasks. Significant differences were found for both maximum EGG frequency and PEAF between the healthy and UVFP groups and between the weak and strong VC tasks. Among the three cough aerodynamic parameters, PEAF showed the highest positive correlation with the maximum EGG frequency. The correlation coefficients between the maximum EGG frequency and PEAF recorded simultaneously were 0.574 for the whole group, and 0.782/0.717/0.823/0.688 for the male/female/male-healthy/male-UVFP subgroups, respectively. Consequently, the maximum EGG frequency m...
Source: Dysphagia - Category: Speech-Language Pathology Source Type: research

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CONCLUSIONS: Two months of expiratory muscle-training program was more beneficial than inspiratory muscle-training program for improving maximum expiratory pressure and voluntary peak cough flow in patients with Parkinson's disease. PMID: 29756459 [PubMed - as supplied by publisher]
Source: Clinical Rehabilitation - Category: Rehabilitation Authors: Tags: Clin Rehabil Source Type: research
Conclusion Chronic respiratory disease in patients with stable IHD is frequent but often missed due to overlap of symptoms. Spirometry is a simple tool to recognize the underlying pulmonary condition and patients respond favorably with appropriate treatment
Source: Indian Heart Journal - Category: Cardiology Source Type: research
We describe patients in whom unexplained chronic cough was associated with dry eyes. Focused workup revealed undiagnosed Sjogren’s syndrome in 36%. Dry eyes, with or without SS, is under-recognized and should be added to diagnostic algorithms for unexplained cough.
Source: Clinical Rheumatology - Category: Rheumatology Source Type: research
Publication date: Available online 9 April 2018 Source:The Lancet Author(s): Chen Wang, Jianying Xu, Lan Yang, Yongjian Xu, Xiangyan Zhang, Chunxue Bai, Jian Kang, Pixin Ran, Huahao Shen, Fuqiang Wen, Kewu Huang, Wanzhen Yao, Tieying Sun, Guangliang Shan, Ting Yang, Yingxiang Lin, Sinan Wu, Jianguo Zhu, Ruiying Wang, Zhihong Shi, Jianping Zhao, Xianwei Ye, Yuanlin Song, Qiuyue Wang, Yumin Zhou, Liren Ding, Ting Yang, Yahong Chen, Yanfei Guo, Fei Xiao, Yong Lu, Xiaoxia Peng, Biao Zhang, Dan Xiao, Chung-Shiuan Chen, Zuomin Wang, Hong Zhang, Xiaoning Bu, Xiaolei Zhang, Li An, Shu Zhang, Zhixin Cao, Qingyuan Zhan, Yuanhua Yan...
Source: The Lancet - Category: General Medicine Source Type: research
Spirometry-defined COPD is highly prevalent in the Chinese adult population. Cigarette smoking, ambient air pollution, underweight, childhood chronic cough, parental history of respiratory diseases, and low education are major risk factors for COPD. Prevention and early detection of COPD using spirometry should be a public health priority in China to reduce COPD-related morbidity and mortality.
Source: LANCET - Category: General Medicine Authors: Tags: Articles Source Type: research
Conclusion The asthma group reacted in a predictable way with impaired lung function from osmotic provocations, whereas the patients with CIC demonstrated peripheral airway changes from hypertonic saline, also known to be a noxious stimulus. The IOS method uncovers differences between patients with CIC and control participants that contribute to our ability to provide a correct diagnosis.
Source: Pulmonary Pharmacology and Therapeutics - Category: Respiratory Medicine Source Type: research
Spirometry is gold standard for detecting chronic lung allograft (CLAD) dysfunction. Peak cough flow (PCF) assesses cough strength and identifies those at risk of developing respiratory tract infections, which contribute to the development of CLAD. Normal adult PCF 440-1200 L/min, ≥ 270 L/min PCF demonstrates adequate cough, ≤ 160 L/min demonstrates inefficient cough. Study Aims: 1. To evaluate the feasibility of recruitment and PCF testing alongside standard care 2. To examine the relationship between PCF and forced vital capacity (FVC) and PCF and forced expiratory volu me in one second (FEV1), and the factors that...
Source: The Journal of Heart and Lung Transplantation - Category: Transplant Surgery Authors: Source Type: research
CONCLUSION: Spirometry should not be used to screen the military force for the presence of respiratory disorders. In those individuals with a history of asthma, in-depth testing should be performed to fully evaluate any non-specific findings identified during spirometry. PMID: 29590412 [PubMed - as supplied by publisher]
Source: Military Medicine - Category: International Medicine & Public Health Tags: Mil Med Source Type: research
They fought off some stiff competition, and now we have the final two competitors in MD+DI's 2018 Medtech Startup Showdown. It's down to a battle of digital health dynamos Strados Labs vs. Spry Health, and once again, we're asking you to help us decide which upstart medtech company has what it takes to make it in the real world. You know the drill by now: We'll give readers a week to vote, and the company that gets the most votes is the winner. We'll feature the champ in an upcoming profile on MD+DI (see complete rules here). strados_vs_spry.png Company name Strados Labs S...
Source: MDDI - Category: Medical Devices Tags: Business Source Type: news
This study aims to identify the key QOL questions correlated with PEF% and proposes a statistical model for prediction of disease severity. MethodsPatients with ISGS presenting to an academic laryngologist were included retrospectively from 2012 to 2016. Peak expiratory flow percentage (age, sex, and height adjusted) was recorded for each visit, along with four validated QOL instruments (European QOL–Five Dimensions; RAND 36‐Item Health Survey; Clinical COPD [Chronic Obstructive Pulmonary Disease] Questionnaire; and the Airway, Dyspnea, Voice, and Swallowing Summary Assessment). A stepwise multiple linear regressio...
Source: The Laryngoscope - Category: ENT & OMF Authors: Tags: Laryngology Source Type: research
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