https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 Effects of changing reference values and definition of the normal range on interpretation of spirometry https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:10921 Sat 24 Mar 2018 08:10:56 AEDT ]]> A randomised trial of domiciliary, ambulatory oxygen in patients with COPD and dyspnoea but without resting hypoxaemia https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:18137 Sat 24 Mar 2018 08:04:44 AEDT ]]> Assessment of breathing patterns and respiratory muscle recruitment during singing and speech in quadriplegia https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:18132 Sat 24 Mar 2018 08:04:28 AEDT ]]> Measurement of FEF25–75% and FEF75% does not contribute to clinical decision making https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:17502 , FVC and FEF25-75% from 11654 white males and 11113 white females, aged 3-94 years, routinely tested in the pulmonary function laboratories of four tertiary hospitals. FEF75% was available in 8254 males and 7407 females. Predicted values and lower limits of normal, defined as the fifth percentile, were calculated for FEV1, FVC, FEV1/FVC ratio, FEF25-75% and FEF75% using prediction equations from the Global Lung Function Initiative. There was very little discordance in classifying test results. FEF25-75% and FEF75% were below the normal range in only 2.75% and 1.29% of cases, respectively, whereas FEV1, FVC and FEV1/FVC ratio were within normal limits. Airways obstruction went undetected by FEF25-75% in 2.9% of cases and by FEF75% in 12.3% of cases. Maximum mid-expiratory flow and flow towards the end of the forced expiratory manoeuvre do not contribute usefully to clinical decision making over and above information from FEV1, FVC and FEV1/FVC ratio.]]> Sat 24 Mar 2018 08:04:05 AEDT ]]> Grading the severity of airways obstruction: new wine in new bottles https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:16918 1)/(forced) vital capacity ((F)VC) ratio below the fifth percentile and graded the severity of pulmonary function impairment using z-scores for FEV₁, which signify how many standard deviations a result is from the mean predicted value. Using the lower limit of normal for FEV₁/(F)VC and z-scores for FEV₁ of -2, -2.5, -3 and -4 to delineate severity grades of airflow limitation leads to close agreement with ATS/ERS severity classifications and removes age, sex and height related bias. The new classification system is simple, easily memorised and clinically valid. It retains previously established associations with clinical outcomes and avoids biases due to the use of per cent predicted FEV₁. Combined with the Global Lung Function prediction equations it provides a worldwide diagnostic standard, free of bias due to age, height, sex and ethnic group.]]> Sat 24 Mar 2018 08:00:32 AEDT ]]> Effect of singing on respiratory function, voice, and mood after quadriplegia: a randomized controlled trial https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:18362 Sat 24 Mar 2018 07:52:40 AEDT ]]> Implications of adopting the Global Lungs Initiative 2012 all-age reference equations for spirometry https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:18364 LLN and FVC20% underdiagnosis of airway obstruction up to the age of 55 years and to 16-23% overdiagnosis in older subjects. GLI 2012 equations increase the prevalence of a "restrictive spirometric pattern" compared to ECSC but decrease it compared to NHANES.]]> Sat 24 Mar 2018 07:52:39 AEDT ]]> Effects of adopting the new Global Lung Function Initiative 2012 reference equations on the interpretation of spirometry https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:18366 Sat 24 Mar 2018 07:52:38 AEDT ]]> Reasons for referral for pulmonary function testing: an audit of 4 adult lung function laboratories https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:28324 Sat 24 Mar 2018 07:25:14 AEDT ]]>