Asthma — Mechanism(s) of Airflow Limitation During Exacerbation of Asthma
Citation(s)
Gelb AF, Christenson SA, Nadel JA Understanding the pathophysiology of the asthma-chronic obstructive pulmonary disease overlap syndrome. Curr Opin Pulm Med. 2016 Mar;22(2):100-5. doi: 10.1097/MCP.0000000000000236.
Gelb AF, Licuanan J, Shinar CM, Zamel N Unsuspected loss of lung elastic recoil in chronic persistent asthma. Chest. 2002 Mar;121(3):715-21. doi: 10.1378/chest.121.3.715.
Gelb AF, Moridzadeh R, Singh DH, Fraser C, George SC In moderate-to-severe asthma patients monitoring exhaled nitric oxide during exacerbation is not a good predictor of spirometric response to oral corticosteroid. J Allergy Clin Immunol. 2012 Jun;129(6)
Gelb AF, Nadel JA Understanding the pathophysiology of the asthma-chronic obstructive pulmonary disease overlap syndrome. J Allergy Clin Immunol. 2015 Sep;136(3):553-5. doi: 10.1016/j.jaci.2015.06.013. No abstract available.
Gelb AF, Yamamoto A, Mauad T, Kollin J, Schein MJ, Nadel JA Unsuspected mild emphysema in nonsmoking patients with chronic asthma with persistent airway obstruction. J Allergy Clin Immunol. 2014 Jan;133(1):263-5.e1-3. doi: 10.1016/j.jaci.2013.09.045. Epu
Gelb AF, Yamamoto A, Verbeken EK, Nadel JA Unraveling the Pathophysiology of the Asthma-COPD Overlap Syndrome: Unsuspected Mild Centrilobular Emphysema Is Responsible for Loss of Lung Elastic Recoil in Never Smokers With Asthma With Persistent Expiratory
Gelb AF, Zamel N, Krishnan A Physiologic similarities and differences between asthma and chronic obstructive pulmonary disease. Curr Opin Pulm Med. 2008 Jan;14(1):24-30. doi: 10.1097/MCP.0b013e3282f197df.
Gelb AF, Zamel N Unsuspected pseudophysiologic emphysema in chronic persistent asthma. Am J Respir Crit Care Med. 2000 Nov;162(5):1778-82. doi: 10.1164/ajrccm.162.5.2001037.
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
