The Effect of Positions on Spirometric Values in Obese Asthmatic Patients

Razi, Ebrahim; Mossavi, Gholam Abbas

doi:10.1378/chest.9915

Cited by 7 publications

(8 citation statements)

References 11 publications

(13 reference statements)

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“…(p=0.05) but it was contrast with the finding of the study done by Aruna G et al The mean of Forced expiratory volume in 1st second (FEV1) and Forced vital capacity (FVC), in obese asthmatics is 1.13 ± 0.24 l/s and 1.61 + 0.38 l/s respectively and in non-obese it is 1.50 + 0.65 l/s and 2.26 + 0.88 l/s. In the present study FEV1, FVC is lower in obese asthmatics compared to non-obese asthmatics which is comparable with the studies done by Pakhale s et al (2010) Dosi R et al, Razi et al 19 The mean percentage change of reversibility in spirometric values (FEV1) among non-obese population is 34.07%, whereas in obese population it is 29.24%. but was not statistically significant.…”

Section: Sample Sizesupporting

confidence: 91%

Assessment of Pulmonary Function and Clinical Features, and Their Comparison Between Obese and Non-Obese Patients of Bronchial Asthma

Hiremath¹,

Amberker²,

Saleem³

2019

jemds

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BACKGROUND Asthma is a heterogeneous disease, usually characterized by chronic inflammation. It is characterised by history of respiratory symptoms such as wheeze, shortness of breath, chest tightness and cough that vary over time and in intensity, together with variable expiratory airflow limitation. 1 Obesity may be defined as an abnormal growth of the adipose tissue due to an enlargement of fat cell size or an increase in fat cell number or both. 2 Asthma with obesity is one of the phenotypes of asthma where patients will have multiple consequences related to excess adipose tissue, including mechanical or physiologic effects on lung function and the airways as well as changes in the immune response and metabolic effects. Our study is a hospital based cross sectional observational study to assess the pulmonary function, clinical profile and its correlation between obese and non-obese bronchial asthmatic patients. METHODS This was an observational study of stable obese and non-obese bronchial asthma patients undergoing pulmonary function test on inpatient or outpatient basis in Department of Pulmonary Medicine, J.J.M. Medical College, Davangere. The study was carried out on 100 patients with bronchial asthma (50 obese and 50 non-obese patients). Detailed history was obtained, physical examination was done along with correlation of pulmonary function and clinical profile. Sample size was taken for convenience. RESULTS In this study, out of 100 patients 55% were males, and 45% were females with higher total cholesterol and triglycerides in obese asthmatics compared to non-obese asthmatics. The most common symptoms were breathlessness followed by cough and wheeze. In this study, it was found that breathlessness, cough, wheeze are more common in obese asthmatics than non-obese asthmatics. There was significant difference of waist circumference (W.C.), hip circumference (H.C.) and waist to hip ratio (W.H.R.) between obese and non-obese asthmatics. Hypertension and diabetes mellitus more prevalent in obese group than non-obese. FVC, FEV1, and FEF25-75 % values were reduced in obese asthmatics compared to non-obese asthmatics in contrast to FEV1/FVC which was higher in obese asthmatics compared to non-obese asthmatics. It was observed that increased in BMI causes impaired pulmonary function. CONCLUSIONS The increasing prevalence of asthma and obesity has suggested an association between the two. The most common symptoms observed in this study were breathlessness, cough and wheeze. PR (Pulse Rate) SBP (Systolic Blood Pressure), DBP (Diastolic Blood Pressure), RR (Respiratory Rate), TLC (Total Leucocyte Count), AEC (Absolute Eosinophil Count), LP (Lipid Profile) were higher in obese asthmatics. Diabetes mellitus and hypertension were more prevalent in obese asthmatics. FVC, FEV1 are decreased in obese asthmatics but the amount of reversibility is more for non-obese asthmatics. It was also observed that increased BMI causes impaired pulmonary function.

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Section: Sample Sizesupporting

confidence: 91%

Assessment of Pulmonary Function and Clinical Features, and Their Comparison Between Obese and Non-Obese Patients of Bronchial Asthma

Hiremath¹,

Amberker²,

Saleem³

2019

jemds

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“…Standing values of the FEV 1 and/or FVC exceeded sitting values by 0.04-0.07 L (37,41). Studies comparing these postures have also reported no significant differences in FEV 1 and/or FVC (35,37,40). Although small, changes in FEV 1 and FVC related to posture may be significant when evaluating spirometry longitudinally.…”

Section: Posture During Spirometrymentioning

confidence: 99%

“…To clarify whether standing versus sitting impacts spirometry results in the workplace, a systematic review of the medical literature was performed. The search identified seven relevant studies (see Table E2) (35)(36)(37)(38)(39)(40)(41), although none were performed in an occupational setting. Two studies found significant postural effects.…”

Section: Posture During Spirometrymentioning

confidence: 99%

Spirometry in Occupational Health—2020

Townsend¹

2020

Journal of Occupational &Amp; Environmental Medicine

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This document addresses aspects of the performance and interpretation of spirometry that are particularly important in the workplace, where inhalation exposures can affect lung function and cause or exacerbate lung diseases, such as asthma, chronic obstructive pulmonary disease, or fibrosis. Methods: Issues that previous American Thoracic Society spirometry statements did not adequately address with respect to the workplace were identified for systematic review. Medline 1950-2012 and Embase 1980-2012 were searched for evidence related to the following: training for spirometry technicians; testing posture; appropriate reference values to use for Asians in North America; and interpretative strategies for analyzing longitudinal change in lung function. The evidence was reviewed and technical recommendations were developed. Results: Spirometry performed in the work setting should be part of a comprehensive workplace respiratory health program. Effective technician training and feedback can improve the quality of spirometry testing. Posture-related changes in FEV 1 and FVC, although small, may impact interpretation, so testing posture should be kept consistent and documented on repeat testing. Until North American Asian-specific equations are developed, applying a correction factor of 0.88 to white reference values is considered reasonable when testing Asian American individuals in North America. Current spirometry should be compared with previous tests. Excessive loss in FEV 1 over time should be evaluated using either a percentage decline (15% plus loss expected due to aging) or one of the other approaches discussed, taking into consideration testing variability, worker exposures, symptoms, and other clinical information. Conclusions: Important aspects of workplace spirometry are discussed and recommendations are provided for the performance and interpretation of workplace spirometry.

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“…Similarly, Razi and Moosavi (2007) 9 conducted a study on adult obese asthmatics and compared their spirometric values to normal weight asthmatics, and concluded that spirometric values in obese asthmatic patients with BMI ≥30 were not affected by the standing or sitting positions.…”

Section: Discussionmentioning

confidence: 99%

“…Solid information on the effects of position and body weight on forced expiratory manoeuvres in children is still lacking. Thus there is need for investigating if spirometric indices (forced expiratory volume in first second [FEV1], forced vital capacity [FEV], forced expiratory flow after 50% of FVC [FEF 50] and peak expiratory flow [PEF]) were affected by body weight or testing posture or not 9 .…”

Section: Introductionmentioning

confidence: 99%

Effects of body weight and posture on pulmonary functions in asthmatic children

Emil¹,

Saad²,

Mohammed³

et al. 2020

Afr H. Sci.

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Background: Asthma is one of the most common chronic illnesses in the world. Pulmonary function tests are important tools in monitoring of asthmatic patients. There is need for investigating if spirometric indices were affected by body weight or posture or not. Objectives: The aim of this study was to evaluate the spirometric measurements in standing and sitting positions in a group of Egyptian asthmatic children with different body weights. Methods: Sixty patients were included. They were stable asthmatics and were following up in the allergy clinic. Spirometry was conducted at pulmonary functions laboratory of Pediatric Allergy and Chest Unit of New Children’s University Hospi- tal, Cairo. The one-way analysis of variance was used to test the differences between groups. The Duncan multiple compar- ison test was used to test the significant differences between each pair of groups. Results: The study found that sitting FEV1/FVC is significantly lower in overweight/obese asthmatic children compared to normal weight asthmatic children (p value=0.046). Conclusion: There was no effect of weight on standing spirometric data. Weight showed significant negative correlation with asthma control level. We concluded that in overweight/obese asthmatic children, spirometric position might affect the results. Keywords: Body weight; posture; asthmatic children.

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The Effect of Positions on Spirometric Values in Obese Asthmatic Patients

Cited by 7 publications

References 11 publications

Assessment of Pulmonary Function and Clinical Features, and Their Comparison Between Obese and Non-Obese Patients of Bronchial Asthma

Assessment of Pulmonary Function and Clinical Features, and Their Comparison Between Obese and Non-Obese Patients of Bronchial Asthma

Spirometry in Occupational Health—2020

Effects of body weight and posture on pulmonary functions in asthmatic children

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