Intermittent Claudication — Dacron vs Dardik for Fem-Pop Bypass
Citation(s)
Scharn DM, Oyen WJ, Klemm PL, Verhofstad AA, van der Vliet JA Thrombogenicity and related biological properties of heparin bonded collagen coated polyester and human umbilical vein prosthetic vascular grafts. J Surg Res. 2006 Aug;134(2):182-9. Epub 2006 Mar 20.
Scharn DM, Oyen WJ, Klemm PL, Wijnen MH, vanderVliet JA Assessment of prosthetic vascular graft thrombogenicity using the technetium-99m labeled glycoprotein IIb/IIIa receptor antagonist DMP444 in a dog model. Cardiovasc Surg. 2002 Dec;10(6):566-9.
Heparin Bonded and Collagen Coated Polyester or Human Umbilical Vein for Femoropopliteal Bypass: a Prospective Randomised Multicentre Trial.
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.
