Validation of Previous Spirometric Reference Equations and New Equations.

Validation of Previous Spirometric Reference Equations and New Equations. J Korean Med Sci. 2019 Dec 09;34(47):e304 Authors: Choi HS, Park YB, Yoon HK, Lim SY, Kim TH, Park JH, Lee WY, Park SJ, Lee SW, Kim WJ, Kim KU, Shin KC, Kim DJ, Kim TE, Yoo KH, Shim JJ, Hwang YI Abstract BACKGROUND: Pulmonary functions are interpreted using predicted values from reference equations that vary with ethnicity, gender, age, height, and weight. The universally used Choi's reference equations are not validated for Korean populations, and the purpose of this study was to validate them and develop new reference equations. METHODS: Subjects with normal spirometry and chest radiographs, no co-morbidities, and non-smokers, from the Korean National Health and National Examination Survey (KNHANES)-VI were enrolled (n = 117). Intraclass correlation coefficient (ICC) was assessed for reliability of reference equations. New reference equations were developed using linear regression analysis. Differences between observed and predicted values were assessed to compare the reference equations from Choi's, Global Lung Function Initiative 2012, KNHANES-IV, and newly developed equations. RESULTS: The ICC of Choi's reference equations was 0.854 (P
Source: Journal of Korean Medical Science - Category: Biomedical Science Tags: J Korean Med Sci Source Type: research

Related Links:

We present a 48 year-old active duty physician who initially presented in 2007 with dyspnea and cough. Despite the absence of variable obstruction on spirometry, a clinical diagnosis of asthma was made. The patient's symptoms were temporized with inhaled corticosteroids and bronchodilators, titrated to his symptoms, until eventual therapeutic failure resulted in re-referral to pulmonary. Chest computed tomography (CT) showed ground-glass nodules and patchy airspace opacities with evidence of thoracic lymphadenopathy. A positron emission tomography CT (PET CT) showed diffuse adenopathy throughout his thorax and abdomen with...
Source: Respiratory Care - Category: Respiratory Medicine Authors: Tags: Respir Med Case Rep Source Type: research
Introduction: Dynamic chest radiography (DCR) is a novel technology that allows real time observation of respiratory kinetics and measurement of lung volumes during different parts of the respiratory cycle. Changes in lung area during respiration have been shown to correlate with vital capacity and total lung capacity.1Aim: To correlate measurements of lung area during tidal and deep breathing on posteroanterior (PA) DCR images with spirometry measurements made on a group of healthy volunteers and COPD patients.Methods: Data from 21 DCR image sequences obtained during tidal and deep breathing from 13 patients (5 healthy vo...
Source: European Respiratory Journal - Category: Respiratory Medicine Authors: Tags: Clinical respiratory physiology, exercise and functional imaging Source Type: research
This study demonstrates the difficulties which arise when assigning a diagnosis of asthma to a symptomatic patient. We believe that careful assessment of airway physiology should be a cornerstone of the diagnostic process in the case of this disease.
Source: European Respiratory Journal - Category: Respiratory Medicine Authors: Tags: Clinical respiratory physiology, exercise and functional imaging Source Type: research
Conclusion: Psychogenic respiratory problems are usually diagnosed by exclusion of other diseases. This diagnosis should be considered in the adolescent age group which has no pathology in physical examination but especially high stress factor. In suspected patients, early psychiatric evaluation is important for early diagnosis of these patients.
Source: European Respiratory Journal - Category: Respiratory Medicine Authors: Tags: Paediatric respiratory epidemiology Source Type: research
The impacts of respiratory viruses in pulmonary exacerbations of CF patientsis not fully understoodMethod: Prospective longitudinal study, 50 CF 6-18 who produce sputum and PEx (2016-2018). Sputum viral respiratory PCR panel, aerobic and fungal culture. Blood count, sedimentation rates and serum C-reactive protein levels were measured and standard spirometry and radiological severity score performed. Additional nasopharyngeal (NP) swab was taken for respiratory virus assessment if clinician considers it necessary.Results: 48.9% sputum samples virus-positive. Human rhinovirus was the most common pathogen (23,4%). Influenza ...
Source: European Respiratory Journal - Category: Respiratory Medicine Authors: Tags: Paediatric bronchology Source Type: research
Conclusions: Close attention to these predictors may identify hospitalized COPD patients at elevated risk for early readmission.Table 1.Factors predicting readmission at 30 days by stepwise logistic regression analysis.VARIABLESORIC 95%Infiltrates at CXR2.170.93-8.80NIV2.880.94-8.80FEV1 (mL)0.990.99-0.99
Source: European Respiratory Journal - Category: Respiratory Medicine Authors: Tags: Monitoring airway disease Source Type: research
We present a 48 year-old active duty physician who initially presented in 2007 with dyspnea and cough. Despite the absence of variable obstruction on spirometry, a clinical diagnosis of asthma was made. The patient's symptoms were temporized with inhaled corticosteroids and bronchodilators, titrated to his symptoms, until eventual therapeutic failure resulted in re-referral to pulmonary. Chest computed tomography (CT) showed ground-glass nodules and patchy airspace opacities with evidence of thoracic lymphadenopathy. A positron emission tomography CT (PET CT) showed diffuse adenopathy throughout his thorax and abdomen with...
Source: Respiratory Medicine Case Reports - Category: Respiratory Medicine Source Type: research
ConclusionsPercent-predicted FEV1 and FVC values for normal children with a T1–T12 height of 22 cm at skeletal maturity were 
Source: Spine Deformity - Category: Orthopaedics Source Type: research
We examined whether CT-derived lung volumes representing air trapping could predict adverse respiratory outcomes and more rapid decline in spirometry to overt COPD using mixed-effect linear modelling. Among these subjects with normal forced expiratory volume in 1 s (FEV1) to forced vital capacity (FVC) ratio, CT-measured residual volume (RVCT) to total lung capacity (TLCCT) ratio varied widely, from 21% to 59%. Over 2.5±0.7 years of follow-up, subjects with higher RVCT/TLCCT had a greater differential rate of decline in FEV1/FVC; those in the upper RVCT/TLCCT tertile had a 0.66% (95% CI 0.06%–1.27%) ...
Source: European Respiratory Journal - Category: Respiratory Medicine Authors: Tags: Original Articles: COPD Source Type: research
Radiographic abnormalities of the pulmonary vessels, such as vascular pruning, are common in advanced airways disease, but it is unknown if pulmonary vascular volumes are related to measures of lung health and airways disease in healthier populations. In 2388 participants of the Framingham Heart Study computed tomography (CT) sub-study, we calculated total vessel volumes and the small vessel fraction using automated CT image analysis. We evaluated associations with measures of lung function, airflow obstruction on spirometry and emphysema on CT. We further tested if associations of vascular volumes with lung function were ...
Source: European Respiratory Journal - Category: Respiratory Medicine Authors: Tags: Lung structure and function, Lung imaging Original Articles: Lung structure and function Source Type: research
More News: Biomedical Science | Radiography | Science | Smokers | Spirometry | Study | Women