Bartz D, Maurer R, Allen RH, Fortin J, Kuang B, Goldberg AB Buccal misoprostol compared with synthetic osmotic cervical dilator before surgical abortion: a randomized controlled trial. Obstet Gynecol. 2013 Jul;122(1):57-63. doi: 10.1097/AOG.0b013e3182983889.
Chambers DG, Willcourt RJ, Laver AR, Baird JK, Herbert WY Comparison of Dilapan-S and laminaria for cervical priming before surgical pregnancy termination at 17-22 weeks' gestation. Int J Womens Health. 2011;3:347-52. doi: 10.2147/IJWH.S25551. Epub 2011 Oct 20.
Chen FC, Bergann A, Krosse J, Merholz A, David M Isosorbide mononitrate vaginal gel versus misoprostol vaginal gel versus Dilapan-S for cervical ripening before first trimester curettage. Eur J Obstet Gynecol Reprod Biol. 2008 Jun;138(2):176-9. Epub 2007 Nov 5.
Fox MC, Krajewski CM Cervical preparation for second-trimester surgical abortion prior to 20 weeks' gestation: SFP Guideline #2013-4. Contraception. 2014 Feb;89(2):75-84. doi: 10.1016/j.contraception.2013.11.001. Epub 2013 Nov 11.
Lichtenberg ES Complications of osmotic dilators. Obstet Gynecol Surv. 2004 Jul;59(7):528-36. Review.
Lyus R, Lohr PA, Taylor J, Morroni C Outcomes with same-day cervical preparation with Dilapan-S osmotic dilators and vaginal misoprostol before dilatation and evacuation at 18 to 21+6 weeks' gestation. Contraception. 2013 Jan;87(1):71-5. doi: 10.1016/j.contraception.2012.07.006. Epub 2012 Aug 13.
Newmann S, Dalve-Endres A, Drey EA; Society of Family Planning . Clinical guidelines. Cervical preparation for surgical abortion from 20 to 24 weeks' gestation. Contraception. 2008 Apr;77(4):308-14. doi: 10.1016/j.contraception.2008.01.004. Epub 2008 Mar 4.
Newmann SJ, Sokoloff A, Tharyil M, Illangasekare T, Steinauer JE, Drey EA Same-day synthetic osmotic dilators compared with overnight laminaria before abortion at 14-18 weeks of gestation: a randomized controlled trial. Obstet Gynecol. 2014 Feb;123(2 Pt 1):271-8. doi: 10.1097/AOG.0000000000000080.
Poon LC, Parsons J Audit of the effectiveness of cervical preparation with Dilapan prior to late second-trimester (20-24 weeks) surgical termination of pregnancy. BJOG. 2007 Apr;114(4):485-8. Epub 2007 Feb 19.
Samuel MI, Parsons JH Hygroscopic dilator (Dilapan-S) and misoprostol combination for the early first-trimester termination of pregnancy: a pilot study. J Fam Plann Reprod Health Care. 2009 Jan;35(1):45-7. doi: 10.1783/147118909787072234.
Schulz KF, Grimes DA, Cates W Jr Measures to prevent cervical injury during suction curettage abortion. Lancet. 1983 May 28;1(8335):1182-5.
International Observational E-Registry on the Use of Dilapan-S/Dilasoft Osmotic Dilators for Cervical Priming Prior to Induced Abortion
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.
