Blood Pressure — Comparison of 3 Techniques for Blood Pressure Measurements During Interventional Neuroradiology Procedures
Citation(s)
Chen G, Meng L, Alexander B, Tran NP, Kain ZN, Cannesson M Comparison of noninvasive cardiac output measurements using the Nexfin monitoring device and the esophageal Doppler. J Clin Anesth. 2012 Jun;24(4):275-83. doi: 10.1016/j.jclinane.2011.08.014.
Mascha EJ, Yang D, Weiss S, Sessler DI Intraoperative Mean Arterial Pressure Variability and 30-day Mortality in Patients Having Noncardiac Surgery. Anesthesiology. 2015 Jul;123(1):79-91. doi: 10.1097/ALN.0000000000000686.
Scheer B, Perel A, Pfeiffer UJ Clinical review: complications and risk factors of peripheral arterial catheters used for haemodynamic monitoring in anaesthesia and intensive care medicine. Crit Care. 2002 Jun;6(3):199-204. doi: 10.1186/cc1489. Epub 2002
Comparison of 3 Techniques for Blood Pressure Measurements During Interventional Neuroradiology Procedures
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.
