http://medicalxpress.com/ en-us Medical Xpress internet news portal provides the latest news on Health and Medicine. (HealthDay)—There is increasing evidence that the small airways contribute significantly to the clinical expression and severity of asthma, according to research published online Nov. 9 in Allergy. http://medicalxpress.com/news/2012-11-evidence-small-airway-role-asthma.html Immunology Tue, 20 Nov 2012 17:10:02 EST news272652446 The American Thoracic Society has issued the first-ever guidelines on the use of fractional exhaled nitric oxide (FENO) that address when to use FENO and how to interpret FENO levels in different clinical settings. The guidelines, which appear in the September 1 American Journal of Respiratory and Critical Care Medicine, are graded based on the available evidence in the literature. http://medicalxpress.com/news/2011-09-ats-publishes-clinical-guidelines-feno.html Diseases, Conditions, Syndromes Thu, 01 Sep 2011 17:34:36 EST news234117259 Using computed tomography (CT), researchers have identified two types of structural changes in the lungs of patients with chronic obstructive pulmonary disease (COPD) that are associated with frequent exacerbations, or episodes when symptoms suddenly worsen. Their findings are published online in the journal Radiology. http://medicalxpress.com/news/2011-07-1057omputed-tomography-lungs-copd-flare-ups.html Diseases, Conditions, Syndromes Wed, 27 Jul 2011 14:00:01 EST news230992280 One-fifth of all patients with pulmonary arterial hypertension suffer with the fatal disease for more than two years before being correctly diagnosed and properly treated, according to a new national study led by researchers at Intermountain Medical Center in Salt Lake City. http://medicalxpress.com/news/2011-07-quicker-diagnosis-treatment-fatal-lung.html Sleep apnea Mon, 11 Jul 2011 14:39:36 EST news229613949