Pitocin or Oral Misoprostol for PROM IOL (POM PROM)

POM PROM: Pitocin or Oral Misoprostol for PROM IOL in Nulliparous Women With Unfavorable Cervical Exams

Premature rupture of membranes (PROM) is a common occurrence of pregnancies at term. A delay from PROM to labor is associated with an increased risk of intrauterine infection and associated maternal and fetal morbidity; therefore, induction of labor (IOL) is recommended. The ideal agent for IOL is not known, particularly among specific subpopulations. The primary aim of this study is to determine if oxytocin (Pitocin) or oral misoprostol results in a shorter interval to delivery after the start of induction among nulliparous women with unfavorable cervical exams with term PROM.

Study Overview

• Status: Completed
• Conditions: PROM
• Intervention / Treatment: Drug: Misoprostol; Drug: Oxytocin

Detailed Description

Premature rupture of membranes (PROM) occurs in approximately 8% of pregnancies at term.1 Although onset of spontaneous labor is often prompt after membrane rupture, a delay from PROM to labor is associated with an increased risk of intrauterine infection and its associated maternal and fetal complications. For this reason, the American College of Obstetricians and Gynecologists (ACOG) endorses induction of labor for PROM "if spontaneous labor does not occur near the time of presentation."

The optimal method for PROM induction is less clear. Prior literature has examined the use of Pitocin (Oxytocin), vaginal and oral misoprostol, and dinoprost with mixed results. The TermPROM study found an increased risk of chorioamnionitis and Neonatal Intensive Care Unit (NICU) admission among women treated with vaginal misoprostol for induction.

The postulated link between vaginal misoprostol and chorioamnionitis is the need for vaginal examination for placement of the misoprostol; more vaginal examinations could potentially increase the risk for infection. Utilizing oral misoprostol would eliminate the need for a vaginal exam for administration, thereby potentially mitigating this risk of infection. Currently, vaginal and oral misoprostol as well as oxytocin are used routinely in clinical care based on provider discretion.

Among 7 randomized controlled trials examining the use of oral misoprostol as compared to oxytocin, two found oral misoprostol to result in faster induction to delivery, two found oxytocin to result in faster deliveries, and the remaining three found no difference between the two.3-9 These studies are limited by small sample size, inadequate reporting of patient demographics, varied misoprostol and oxytocin protocols, and inconsistent primary outcomes. Therefore, the utility of oral misoprostol in this population has not been established. Furthermore, its efficacy in specific patient populations is unreported in the literature.

The primary aim of this study is to determine if oxytocin or oral misoprostol results in a shorter interval to delivery after the start of induction among nulliparous women with unfavorable cervical exams with PROM.

• Study Type: Interventional
• Enrollment (Actual): 108
• Phase: Phase 4

Contacts and Locations

• Study Contact: Name: Whitney R Bender, MD; Phone Number: 4342948416; Email: whitney.bender@pennmedicine.upenn.edu

Study Locations

• United States
  • Pennsylvania
    • Philadelphia, Pennsylvania, United States, 19104
      • Hospital of the University of Pennsylvania

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

• English Speaking
• PROM </= 24 hours with no evidence of labor
• >/= 36 weeks gestation
• Agreeable to induction of labor
• Nulliparous
• Singleton pregnancy
• Vertex presentation
• Cervical dilation </=2 cm AND Bishop score < 8

Exclusion Criteria:

• Prior cesarean section
• Other contraindication to vaginal delivery
• Intrauterine Fetal Demise
• Major Congenital Anomaly
• Intraamniotic infection diagnosed at time of admission
• 36 weeks - 36 weeks and 6 days with unknown Group B Strep (GBS) status

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Active Comparator: Oxytocin	Drug: Oxytocin; IV Oxytocin 2 milliunits (mU)/min, increased by 2mU/min q15 minutes per hospital protocol
Active Comparator: Oral Misoprostol	Drug: Misoprostol; Oral misoprostol 50 mcg every 4 hours for up to 6 doses or until cervical ripening is no longer indicated

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Time from IOL to delivery	Time (hours) from start of IOL to delivery	Enrollment to Delivery

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Infection	Suspected intraamniotic infection	Enrollment to Delivery
Time from PROM to delivery	Time (hours) from PROM to delivery	Enrollment to Delivery
Time from IOL to vaginal delivery	Time (hours) from PROM to delivery	Enrollment to Delivery
Time from PROM to vaginal delivery	Time (hours) from PROM to vaginal delivery	Enrollment to Delivery
Cesarean delivery	Cesarean section rate	Enrollment to Delivery
Maternal morbidity	Composite maternal morbidity: postpartum hemorrhage, blood transfusion, endometritis, wound infection, venous thromboembolism (VTE), hysterectomy, Intensive care unit (ICU) admission, readmission within 1 week, death	Enrollment to 1 week postpartum
Neonatal Morbidity	Composite neonatal morbidity: NICU admission > 48 hours, neonatal blood transfusion, hypoxic ischemic encephalopathy, intraventricular hemorrhage grade III or IV, headcooling, severe respiratory distress syndrome, necrotizing enterocolitis, sepsis, death	Enrollment to 1 week postpartum

Collaborators and Investigators

• Sponsor: University of Pennsylvania

Publications and helpful links

General Publications

• Committee on Practice Bulletins-Obstetrics. ACOG Practice Bulletin No. 188: Prelabor Rupture of Membranes. Obstet Gynecol. 2018 Jan;131(1):e1-e14. doi: 10.1097/AOG.0000000000002455.
• Hannah ME, Ohlsson A, Farine D, Hewson SA, Hodnett ED, Myhr TL, Wang EE, Weston JA, Willan AR. Induction of labor compared with expectant management for prelabor rupture of the membranes at term. TERMPROM Study Group. N Engl J Med. 1996 Apr 18;334(16):1005-10. doi: 10.1056/NEJM199604183341601.
• Al-Hussaini TK, Abdel-Aal SA, Youssef MA. Oral misoprostol vs. intravenous oxytocin for labor induction in women with prelabor rupture of membranes at term. Int J Gynaecol Obstet. 2003 Jul;82(1):73-5. doi: 10.1016/s0020-7292(03)00136-x. No abstract available.
• Crane JM, Delaney T, Hutchens D. Oral misoprostol for premature rupture of membranes at term. Am J Obstet Gynecol. 2003 Sep;189(3):720-4. doi: 10.1067/s0002-9378(03)00768-3.
• Butt KD, Bennett KA, Crane JM, Hutchens D, Young DC. Randomized comparison of oral misoprostol and oxytocin for labor induction in term prelabor membrane rupture. Obstet Gynecol. 1999 Dec;94(6):994-9. doi: 10.1016/s0029-7844(99)00423-8.
• Ngai SW, Chan YM, Lam SW, Lao TT. Labour characteristics and uterine activity: misoprostol compared with oxytocin in women at term with prelabour rupture of the membranes. BJOG. 2000 Feb;107(2):222-7. doi: 10.1111/j.1471-0528.2000.tb11693.x.
• Mozurkewich E, Horrocks J, Daley S, Von Oeyen P, Halvorson M, Johnson M, Zaretsky M, Tehranifar M, Bayer-Zwirello L, Robichaux A 3rd, Droste S, Turner G; MisoPROM study. The MisoPROM study: a multicenter randomized comparison of oral misoprostol and oxytocin for premature rupture of membranes at term. Am J Obstet Gynecol. 2003 Oct;189(4):1026-30. doi: 10.1067/s0002-9378(03)00845-7.
• Mbaluka CM, Kamau K, Karanja JG, Mugo N. EFFECTIVENESS AND SAFETY OF 2-HOURLY 20 MCG ORAL MISOPROSTOL SOLUTION COMPARED TO STANDARD INTRAVENOUS OXYTOCIN IN LABOUR INDUCTION DUE TO PRE-LABOUR RUPTURE OF MEMBRANES AT TERM: A RANDOMISED CLINICAL TRIAL AT KENYATTA NATIONAL HOSPITAL. East Afr Med J. 2014 Sep;91(9):303-10.

Study record dates

Study Major Dates

• Study Start (Actual): August 12, 2019
• Primary Completion (Actual): December 8, 2022
• Study Completion (Actual): January 8, 2023

Study Registration Dates

• First Submitted: July 19, 2019
• First Submitted That Met QC Criteria: July 19, 2019
• First Posted (Actual): July 23, 2019

Study Record Updates

• Last Update Posted (Actual): January 12, 2024
• Last Update Submitted That Met QC Criteria: January 9, 2024
• Last Verified: January 1, 2024

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Pregnancy Complications; Obstetric Labor Complications; Female Urogenital Diseases and Pregnancy Complications; Urogenital Diseases; Fetal Membranes, Premature Rupture; Physiological Effects of Drugs; Gastrointestinal Agents; Reproductive Control Agents; Anti-Ulcer Agents; Abortifacient Agents, Nonsteroidal; Abortifacient Agents; Oxytocics; Oxytocin; Misoprostol
• Other Study ID Numbers: 833536

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: Yes