Subarachnoid Hemorrhage, Aneurysmal — Trial of Prophylactic Decompressive Craniectomy for Poor-grade Aneurysmal Subarachnoid Hemorrhage
Citation(s)
Dorfer C, Frick A, Knosp E, Gruber A Decompressive hemicraniectomy after aneurysmal subarachnoid hemorrhage. World Neurosurg. 2010 Oct-Nov;74(4-5):465-71. doi: 10.1016/j.wneu.2010.08.001. Epub 2011 Jan 12.
Schirmer CM, Hoit DA, Malek AM Decompressive hemicraniectomy for the treatment of intractable intracranial hypertension after aneurysmal subarachnoid hemorrhage. Stroke. 2007 Mar;38(3):987-92. Epub 2007 Feb 1.
Zhao B, Zhao Y, Tan X, Cao Y, Wu J, Zhong M, Wang S Primary decompressive craniectomy for poor-grade middle cerebral artery aneurysms with associated intracerebral hemorrhage. Clin Neurol Neurosurg. 2015 Jun;133:1-5. doi: 10.1016/j.clineuro.2015.03.009. Epub 2015 Mar 14.
Trial of Prophylactic Decompressive Craniectomy for Poor-grade Aneurysmal Subarachnoid Hemorrhage
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.
