Abolfotouh MA, Salam M, Bani-Mustafa A, White D, Balkhy HH Prospective study of incidence and predictors of peripheral intravenous catheter-induced complications. Ther Clin Risk Manag. 2014 Dec 8;10:993-1001. doi: 10.2147/TCRM.S74685. eCollection 2014.
Abumrad NN, Rabin D, Diamond MP, Lacy WW Use of a heated superficial hand vein as an alternative site for the measurement of amino acid concentrations and for the study of glucose and alanine kinetics in man. Metabolism. 1981 Sep;30(9):936-40.
Liu D, Moberg E, Kollind M, Lins PE, Adamson U, Macdonald IA Arterial, arterialized venous, venous and capillary blood glucose measurements in normal man during hyperinsulinaemic euglycaemia and hypoglycaemia. Diabetologia. 1992 Mar;35(3):287-90.
Nauck MA, Liess H, Siegel EG, Niedmann PD, Creutzfeldt W Critical evaluation of the 'heated-hand-technique' for obtaining 'arterialized' venous blood: incomplete arterialization and alterations in glucagon responses. Clin Physiol. 1992 Sep;12(5):537-52.
Raffa m, Greco M, Barbati A Intravenous Retrograde Anesthesia. In: Alemanno F, Bosco M, Barbati A, eds. Anesthesia of the Upper Limb. Verlag, Italia: Springer; 2014 225-230.
Comparison of Retrograde and Antegrade Peripheral Intravenous Cannulation on the Ability to Aspirate Blood Samples in the Operating Room
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.
