Comparison of 2 Different Indomethacin Dosing Protocols to Treat Infants Delivered at <28 Weeks Gestation With a Persistent Patent Ductus Arteriosus

Condition(s) targeted: Patent Ductus Arteriosus

Intervention: indomethacin (two different dosing regimens) (Drug)

Phase: Phase 2

Status: Completed

Sponsored by: University of California, San Francisco

Official(s) and/or principal investigator(s):
Ronald Clyman, M.D., Principal Investigator, Affiliation: University of California, San Francisco

The purpose of this study is to examine if a higher dose of indomethacin will increase the rate of ductus arteriosus closure in extremely premature infants without increasing the side effects. The long term objective is to find the optimal dosing of indomethacin for permanent closure of the Ductus and prevent the morbidity related to PDA and the complications of surgical ligation.

Official title: Comparison of 2 Different Indomethacin Dosing Protocols to Treat Infants Delivered at <28 Weeks Gestation With a Persistent Patent Ductus Arteriosus

Study design: Prevention, Randomized, Double-Blind, Dose Comparison, Single Group Assignment, Safety/Efficacy Study

Primary outcome:

The incidence of ductus closure, as determined by echocardiography, following the last dose of study drug

The incidence of the appearance of a symptomatic PDA following the last dose of study drug

The incidence of ductus ligation.

Secondary outcome:

Altered renal function during treatment

Incidence of Necrotizing enterocolitis

Incidence of chronic lung disease

Detailed description: This study is a Phase II randomized, masked, controlled trial that compares the current standard dose of indomethacin to a higher dose for the closure of PDA in premature infants less than 28 weeks of gestation.

Neonates (<28 weeks gestation) who are started on indomethacin treatment (with an initial 3-dose course: 0. 2, 0. 1, and 0. 1 mg/kg of indomethacin) within the first 96 hr after birth will be eligible for this trial if they continue to have Doppler evidence of ductus patency before the third dose of indomethacin. This group of infants have greater than 65% chance of developing symptomatic PDA and surgical ligation even after our standard extended course of indomethacin. Those infants who do not fit the exclusion criteria will be randomized to either a Standard Dose group or to a Higher Dose group after obtaining consent. The infants randomized to the standard group will receive a 4th, 5th, and 6th dose of indomethacin (0. 1 mg/kg) at 24 hr intervals (starting at 24 hr after the 3rd dose). The Higher Dose group infants delivered between 26-27 weeks gestation will receive a 4th, 5th, 6th, 7th, 8th and 9th dose of indomethacin (0. 1mg/kg) at 12 hr intervals (starting 12 hr after the 3rd dose). The Higher Dose group infants between 24-25 weeks gestation will receive a 4th, 5th, 6th, 7th, 8th and 9th dose of indomethacin (0. 25mg/kg) at 12 hour intervals (starting 12 hr after the 3rd dose). To keep the study blinded, the standard group will receive 3 extra doses of saline to match the 3 additional doses given to the higher dose group.

Minimum age: N/A. Maximum age: 48 Hours. Gender(s): Both.

Criteria:

Inclusion Criteria:

1. Newborn infants of less than 28 weeks gestational age who are treated with indomethacin during the first 48 hours after birth

2. Presence of patent ductus arteriosus (PDA) by Doppler echocardiography between the second and third dose of indomethacin.

3. Creatinine ≤1. 8 mg/dl

4. Platelets ≥ 50,000

Exclusion Criteria:

1. Chromosomal disorders.

2. Major congenital anomalies.

3. Contraindications for indomethacin

1. Necrotizing enterocolitis, by clinical or radiological evidence

2. Evidence of bleeding diathesis as evidenced by pulmonary hemorrhage, persistent oozing from puncture sites, grossly bloody stool (Note: Infants with an intracranial hemorrhage can be enrolled in this study).

University of California San Francisco, Davis, California 94143, United States

University of Chicago, Chicago, Illinois, United States

Brown University, Providence, Rhode Island, United States

Starting date: August 2003
Ending date: July 2006
Last updated: June 2, 2008