Cancer — Single-center Randomized Trial for Comparison of Performance Between Domestic and Imported Chemoport
Citation(s)
Ahn SJ, Kim HC, Chung JW, An SB, Yin YH, Jae HJ, Park JH Ultrasound and fluoroscopy-guided placement of central venous ports via internal jugular vein: retrospective analysis of 1254 port implantations at a single center. Korean J Radiol. 2012 May-Jun;13(3):314-23. doi: 10.3348/kjr.2012.13.3.314. Epub 2012 Apr 17.
Teichgräber UK, Kausche S, Nagel SN, Gebauer B Outcome analysis in 3,160 implantations of radiologically guided placements of totally implantable central venous port systems. Eur Radiol. 2011 Jun;21(6):1224-32. doi: 10.1007/s00330-010-2045-7. Epub 2011 Jan 5.
Teichgräber UK, Kausche S, Nagel SN Evaluation of radiologically implanted central venous port systems explanted due to complications. J Vasc Access. 2011 Oct-Dec;12(4):306-12. doi: 10.5301/JVA.2011.7739.
Single-center Randomized Trial for Comparison of Performance Between Domestic and Imported Chemoport
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.
