Spirometry: step by step

Moore, Vicky

doi:10.1183/20734735.0021711

Cited by 138 publications

(102 citation statements)

References 10 publications

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“…The age range of the patients was 19-75 years with an average age of 41 years. On doctor's suggestion, the patients go through the standard spirometry [17] to measure the FEV1 and FVC. Prior approval for recording was obtained from hospital ethics committee and consent for recording was taken from each subject.…”

Section: Datasetmentioning

confidence: 99%

Automatic prediction of spirometry readings from cough and wheeze for monitoring of asthma severity

Rao

Kausthubha

Yadav

et al. 2017

2017 25th European Signal Processing Conference (EUSIPCO)

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Abstract-We consider the task of automatically predicting spirometry readings from cough and wheeze audio signals for asthma severity monitoring. Spirometry is a pulmonary function test used to measure forced expiratory volume in one second (FEV1) and forced vital capacity (FVC) when a subject exhales in the spirometry sensor after taking a deep breath. FEV1%, FVC% and their ratio are typically used to determine the asthma severity. Accurate prediction of these spirometry readings from cough and wheeze could help patients to non-invasively monitor their asthma severity in the absence of spirometry. We use statistical spectrum description (SSD) as the cue from cough and wheeze signal to predict the spirometry readings using support vector regression (SVR). We perform experiments with cough and wheeze recordings from 16 healthy persons and 12 patients. We find that the coughs are better predictor of spirometry readings compared to the wheeze signal. FEV1%, FVC% and their ratio are predicted with root mean squared error of 11.06%, 10.3% and 0.08 respectively. We also perform a three class asthma severity level classification with predicted FEV1% and obtain an accuracy of 77.77%.

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Section: Datasetmentioning

confidence: 99%

Automatic prediction of spirometry readings from cough and wheeze for monitoring of asthma severity

Rao

Kausthubha

Yadav

et al. 2017

2017 25th European Signal Processing Conference (EUSIPCO)

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“…In the case of restrictive ventilator defects, the FEV 1 /FVC ratio remains normal or typically high with reduced FEV 1 as well as FVC. A reduced FVC ratio, along with a lower FEV 1 /FVC ratio, is an indicator of a mixed ventilator defect [24,25]. In the current study, spirometry results revealed that 44% of the respondents in the experimental group, and 73% of the subjects in the control group, had a normal ventilatory function.…”

Section: Resultsmentioning

confidence: 48%

Occupational health surveillance: pulmonary function testing and oxidative stress among photocopying workers in Pakistan

Javed

Ghani

Ghani³

et al. 2019

Med Pr

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Background: The photocopying occupation contributes to various health issues in workers. Elevated levels of oxidative stress have been found to be associated with respiratory problems in occupational workers. The intention of the current research is to evaluate the association between the pulmonary function parameters, a biomarker of oxidative stress, and the photocopying occupation in Lahore, Pakistan. Material and Methods: The study was performed on a group of photocopying operators (N = 100) and a control group (N = 100). A structured questionnaire was developed to gather the demographic attributes. Lung function testing was done with the spirometer. The blood lipid peroxides level, as thiobarbituric acid reactive substances (TBARS), was assessed spectrophotometrically. Results: A statistically significant reduction was found in the pulmonary function parameters as compared to the control group. In the study group, the prevalence of respiratory symptoms, including cough (31%), sneezing (18%), wheezing (9%) and breathing issues (19%), was high as compared to the control group. A significantly higher plasma TBARS concentration was observed in the photocopying workers. A negative correlation prevailed between FVC (−0.081), FVC% predicted (−0.038) and FEV1 (−0.043), and the duration of exposure. Conclusions: The study showed that the occupational exposure could have a significant effect on the normal pulmonary function and the oxidative potential of well-being. The profound emissions in the vicinity of photocopying centers may be responsible for the variations in the pulmonary function parameters and oxidative stress.

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“…What changed the initial diagnosis, there were the results of spirometrydespite that the values of spirometry parameters were within the normal range, the shape of the flow-volume curve was abnormal. Instead of characteristic concave shape of flow-volume curve for bronchial obstruction with reduced FEV 1 and reduced FEV 1 /FVC ratio [8], there was a plateau of forced expiratory flow with normal FEV 1 and decreased PEF. Such changes should alert to the possibility of central airway obstruction [9][10][11].…”

Section: Discussionmentioning

confidence: 90%

Sarcoidosis-Associated Pulmonary Hypertension Treated with Sildenafil

Kusak

Cichocka‐Jarosz

Jedynak-Wąsowicz

et al. 2017

Advances in Respiratory Medicine

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Vascular rings are congenital defects of great vessels. They cause compression of the trachea or/and the esophagus and therefore result in symptoms like inspiratory stridor, cough, wheezing, recurrent respiratory tract infections or dysphagia. In some cases, the correct diagnosis can be delayed for many years, especially when vascular rings produce less severe symptoms or symptoms mimicking other diseases (most of all asthma). In this article, we would like to emphasis the usefulness of pulmonary function test (spirometry) in the initial diagnosis of vascular rings in school-aged children, as well as the importance of spirometry in evaluating patients with asthma presumption.

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Spirometry: step by step

Cited by 138 publications

References 10 publications

Automatic prediction of spirometry readings from cough and wheeze for monitoring of asthma severity

Automatic prediction of spirometry readings from cough and wheeze for monitoring of asthma severity

Occupational health surveillance: pulmonary function testing and oxidative stress among photocopying workers in Pakistan

Sarcoidosis-Associated Pulmonary Hypertension Treated with Sildenafil

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