Behrman SW, Zarzaur BL, Parmar A, Riall TS, Hall BL, Pitt HA Routine drainage of the operative bed following elective distal pancreatectomy does not reduce the occurrence of complications. J Gastrointest Surg. 2015 Jan;19(1):72-9; discussion 79. doi: 10.1007/s11605-014-2608-z. Epub 2014 Aug 13.
Knaebel HP, Diener MK, Wente MN, Buchler MW, Seiler CM Systematic review and meta-analysis of technique for closure of the pancreatic remnant after distal pancreatectomy. Br J Surg. 2005 May;92(5):539-46. doi: 10.1002/bjs.5000.
Mangieri CW, Kuncewitch M, Fowler B, Erali RA, Moaven O, Shen P, Clark CJ Surgical drain placement in distal pancreatectomy is associated with an increased incidence of postoperative pancreatic fistula and higher readmission rates. J Surg Oncol. 2020 Jul 2:10.1002/jso.26072. doi: 10.1002/jso.26072. Online ahead of print.
Paulus EM, Zarzaur BL, Behrman SW Routine peritoneal drainage of the surgical bed after elective distal pancreatectomy: is it necessary? Am J Surg. 2012 Oct;204(4):422-7. doi: 10.1016/j.amjsurg.2012.02.005. Epub 2012 May 10.
Sell NM, Pucci MJ, Gabale S, Leiby BE, Rosato EL, Winter JM, Yeo CJ, Lavu H The influence of transection site on the development of pancreatic fistula in patients undergoing distal pancreatectomy: A review of 294 consecutive cases. Surgery. 2015 Jun;157(6):1080-7. doi: 10.1016/j.surg.2015.01.014. Epub 2015 Mar 16.
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.