American Society of Anesthesiologists Task Force on Acute Pain Management Practice guidelines for acute pain management in the perioperative setting: an updated report by the American Society of Anesthesiologists Task Force on Acute Pain Management. Anesthesiology. 2012 Feb;116(2):248-73. doi: 10.1097/ALN.0b013e31823c1030.
Dowell D, Haegerich TM, Chou R CDC Guideline for Prescribing Opioids for Chronic Pain--United States, 2016. JAMA. 2016 Apr 19;315(15):1624-45. doi: 10.1001/jama.2016.1464. Review.
Hill MV, McMahon ML, Stucke RS, Barth RJ Jr Wide Variation and Excessive Dosage of Opioid Prescriptions for Common General Surgical Procedures. Ann Surg. 2017 Apr;265(4):709-714. doi: 10.1097/SLA.0000000000001993.
Hill MV, Stucke RS, McMahon ML, Beeman JL, Barth RJ Jr An Educational Intervention Decreases Opioid Prescribing After General Surgical Operations. Ann Surg. 2018 Mar;267(3):468-472. doi: 10.1097/SLA.0000000000002198.
Sun EC, Darnall BD, Baker LC, Mackey S Incidence of and Risk Factors for Chronic Opioid Use Among Opioid-Naive Patients in the Postoperative Period. JAMA Intern Med. 2016 Sep 1;176(9):1286-93. doi: 10.1001/jamainternmed.2016.3298. Erratum in: JAMA Intern Med. 2016 Sep 1;176(9):1412.
Optimizing Pain Control in Transurethral Resection of the Prostate
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.
