Genç F, Tan M The effect of acupressure application on chemotherapy-induced nausea, vomiting, and anxiety in patients with breast cancer. Palliat Support Care. 2015 Apr;13(2):275-84. doi: 10.1017/S1478951514000248. Epub 2014 Apr 30.
Hirsch J Impact of postoperative nausea and vomiting in the surgical setting. Anaesthesia. 1994 Jan;49 Suppl:30-3. Review.
Lee A, Fan LT Stimulation of the wrist acupuncture point P6 for preventing postoperative nausea and vomiting. Cochrane Database Syst Rev. 2009 Apr 15;(2):CD003281. doi: 10.1002/14651858.CD003281.pub3. Review. Update in: Cochrane Database Syst Rev. 2015;11:CD003281.
Liodden I, Howley M, Grimsgaard AS, Fønnebø VM, Borud EK, Alraek T, Norheim AJ Perioperative acupuncture and postoperative acupressure can prevent postoperative vomiting following paediatric tonsillectomy or adenoidectomy: a pragmatic randomised controlled trial. Acupunct Med. 2011 Mar;29(1):9-15. doi: 10.1136/aim.2010.002915. Epub 2010 Dec 18.
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.
