<h3>BACKGROUND</h3> Steroid resistant asthma (SRA) represents a small subgroup of those patients who have asthma and who are difficult to manage. Two patients with apparent SRA are described, and 12 additional cases who were admitted to the same hospital are reviewed. <h3>METHODS</h3> The subjects were selected from a tertiary hospital setting by review of all asthma patients admitted over a two year period. Subjects were defined as those who failed to respond to high doses of bronchodilators and oral glucocorticosteroids, as judged by subjective assessment, audible wheeze on examination, and serial peak flow measurements. <h3>RESULTS</h3> In 11 of the 14 patients identified there was little to substantiate the diagnosis of severe or steroid resistant asthma apart from symptoms and upper respiratory wheeze. Useful tests to differentiate this group of patients from those with severe asthma appear to be: the inability to perform reproducible forced expiratory manoeuvres, normal airway resistance, and a concentration of histamine causing a 20% fall in the forced expiratory volume (FEV<sub>1</sub>) being within the range for normal subjects (PC<sub>20</sub>). Of the 14 subjects, four were health care staff and two reported childhood sexual abuse. <h3>CONCLUSION</h3> Such patients are important to identify as they require supportive treatment which should not consist of high doses of glucocorticosteroids and β<sub>2</sub> adrenergic agonists. Diagnoses other than asthma, such as gastro-oesophageal reflux, hyperventilation, vocal cord dysfunction and sleep apnoea, should be sought as these may be a cause of glucocorticosteroid treatment failure and pseudo-SRA, and may respond to alternative treatment.
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The structural behaviour of elliptical hollow sections (EHS) has been examined in previous studies under the isolated loading conditions of pure compression and pure bending.This paper examines the response of EHS under combined compression plus uniaxial bending at the cross-sectional level.Structural performance data were initially generated through a series of laboratory stub column tests with various load eccentricities.The measured geometric and material properties of the test specimens, together with the full load-deformation histories have been reported herein.The test data were supplemented by further results generated through parallel numerical studies.Slenderness parameters and limits for EHS under combined compression plus bending were developed following analytical work.Finally, the experimental and numerical data were used to verify proposed interaction expressions for the design of EHS under combined loading; these have been developed in accordance with Eurocode 3 for ease of future incorporation.