Acne Vulgaris — Trial of Single Microneedle Radiofrequency for Moderate‐to‐Severe Acne Vulgaris
Citation(s)
Ahn GR, Kim JM, Park SJ, Li K, Kim BJ Selective Sebaceous Gland Electrothermolysis Using a Single Microneedle Radiofrequency Device for Acne Patients: A Prospective Randomized Controlled Study. Lasers Surg Med. 2019 Sep 10. doi: 10.1002/lsm.23152. [Epub ahead of print]
Lynn DD, Umari T, Dunnick CA, Dellavalle RP The epidemiology of acne vulgaris in late adolescence. Adolesc Health Med Ther. 2016 Jan 19;7:13-25. doi: 10.2147/AHMT.S55832. eCollection 2016. Review.
Tang X, Li C, Ge S, Chen Z, Lu L Efficacy of photodynamic therapy for the treatment of inflammatory acne vulgaris: A systematic review and meta-analysis. J Cosmet Dermatol. 2019 Oct 25. doi: 10.1111/jocd.13197. [Epub ahead of print] Review.
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.
