Chronic Obstructive Pulmonary Disease (COPD) — Comparison of Two Positive Expiratory Pressure Devices in Stable COPD Patients
Citation(s)
Bulcun E, Ekici M, Ekici A Assessment of patients' preferences regarding the characteristics associated with the treatment of chronic obstructive pulmonary disease. Int J Chron Obstruct Pulmon Dis. 2014 Apr 16;9:363-8. doi: 10.2147/COPD.S56229. eCollection 2014.
Orlik T, Sands D Application of positive expiratory pressure *PEP* in cystic fibrosis patient inhalations. Dev Period Med. 2015 Jan-Mar;19(1):50-9.
Sethi S, Yin J, Anderson PK Lung flute improves symptoms and health status in COPD with chronic bronchitis: A 26 week randomized controlled trial. Clin Transl Med. 2014 Sep 23;3:29. doi: 10.1186/s40169-014-0029-y. eCollection 2014.
Comparison of Two Positive Expiratory Pressure Devices in Stable COPD Patients
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.
