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CompletedNCT00240487Updated Apr 24, 2015Results posted

Nitric Oxide Administration for Acute Respiratory Distress Syndrome

A Phase 3 interventional study of Nitric Oxide and No Intervention in Acute Respiratory Distress Syndrome, sponsored by Children's Hospital of Philadelphia. Completed at 1 site in United States. Open to participants aged 1 Month to 18 Years. Per ClinicalTrials.gov, last updated 2015-04-24.

Sponsored by Children's Hospital of Philadelphia · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
52
Allocation
Randomized
Ages
1 Month to 18 Years
Sex
All
01

Study summary

This research project is an open-label, randomized study for the use of Nitric Oxide in pediatric patients with acute respiratory distress syndrome (ARDS). The study examines whether nitric oxide (NO) treatment impacts the the P:F ratio (arterial partial pressure of oxygen (PaO2) divided by fraction of inspired oxygen (FiO2) in patients with ARDS. The goal of the study is to evaluate whether the order of NO therapy will have any effect on response, and evaluate the characteristics of patients who respond to NO compared to those who do not.

Read the detailed description

At low concentrations, nitric oxide(NO) functions as a cellular messenger and regulator of microcirculation. NO may have an important role in the pathogenesis of ARDS as well as its treatment. NO may be primarily useful in improving matching of ventilation and perfusion in the lung. The aims of the study are to attempt to show that NO will improve oxygenation as evidenced by improvement in PaO2/FiO2. Secondary aims are to see if the improvement in oxygenation allows there to be decreased time on FiO2>0.60, evaluate whether the order of NO therapy will have any effect on response, and evaluate the characteristics of patients who respond to NO compared to those who do not.

Subjects will be randomized to receive either nitric oxide first (nitric oxide for the first 4 hours, then no intervention/no nitric oxide for the next 4 hours) or delayed treatment with nitric oxide (no intervention/no nitric oxide for the first 4 hours, then nitric oxide for the next 4 hours)..

Blood gases were monitored once an hour during study participation (total of 8 hours). Final PaO2/FiO2 levels will be compared after 8 hours of study treatment in each group.

02

Conditions studied

  • Acute Respiratory Distress Syndrome

Keywords

  • Acute Respiratory Distress Syndrome
  • ARDS
  • Nitric Oxide
03

In context

Respiratory Distress Syndrome

1,597 studies on the registry are indexed under Respiratory Distress Syndrome; 312 are open to participants now.

This study's enrollment of 52 is below the median of 60 across 961 interventional studies indexed under Respiratory Distress Syndrome.

Browse Respiratory Distress Syndrome studies →

Lead sponsor

Children's Hospital of Philadelphia is the lead sponsor of 480 studies on the registry; 85 are open to participants now.

Of its 28 completed or terminated interventional studies of FDA-regulated products, 22 (79%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
1 Month to 18 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Patient is intubated and mechanically ventilated in the Pediatric Intensive Care Unit with a PaO2/FiO2 ratio less than or equal to 100, FiO2 greater than or equal to 0.60, PEEP greater than or equal to 10, and a Murray score greater than or equal to 2.5.

Exclusion criteria

Exclusion Criteria:

  • Neonates (1 week to 28 days) and/or patients on extracorporeal membrane oxygenation
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
52 participants (actual)

Study arms

  • Active comparator
    Nitric oxide first

    Subjects will be randomized to receive Nitric Oxide (NO) immediately after study entry, given at 10 parts per million (ppm) for the first 4 hours of study participation. Blood gases will be monitored once an hour for 4 hours. After the first 4 hours of study participation, the nitric oxide (NO) will be turned off and subjects will receive no intervention (no nitric oxide) for the next 4 hours of study participation. During this time, all subjects will receive standard clinical are. Blood gases will be monitored once an hour for 4 hours.

    Drug: Nitric Oxide · Other: No Intervention

  • Active comparator
    Delayed nitric oxide

    Subjects will be randomized to receive no intervention (no nitric oxide) for he first 4 hours of study participation. During this time, all subjects will receive standard clinical care. Blood gases will be monitored once an hour for 4 hours. After the first 4 hours of study participation, the nitric oxide will be turned on and subjects will receive 10 ppm of nitric oxide for the next 4 hours of study participation. Blood gases will be monitored once an hour for 4 hours.

    Drug: Nitric Oxide · Other: No Intervention

Interventions

  • DrugNitric Oxide

    Subjects will receive inhaled Nitric Oxide at a dose of 10 parts per million (ppm) for a 4 hour study period. Blood gases will be collected once an hour.

    Also known as: Inhaled Nitric Oxide

  • OtherNo Intervention

    Subjects will receive no intervention (i.e., no nitric oxide treatment) for a 4 hour study period. Blood gases will be collected once an hour. During this time, all subjects will receive standard clinical care.

06

What researchers measure

Primary outcomes

  1. Mean PaO2/FiO2 Ratio

    Arterial blood gas measurements with cooximetry to evaluate arterial partial pressure of oxygen (PaO2) and fraction of inspired oxygen (FiO2) ratio. The mean PaO2/FiO2 ratio for each group after completion 8 hour of study participation was compared

    Time frame: 8 hours

07

Results

Posted Apr 24, 2015
Limitations and caveats
There may be some confounding of effects of lung recruitment from high mean airway pressures over the duration of the observation period.

Participant flow

Patients were recruited from the Pediatric Intensive Care Unit from 2000-2008.

Participant flow — Overall Study
MilestoneNitric Oxide FirstDelayed Nitric Oxide
Started2428
Completed2428
Not completed00

Outcome measures

PrimaryMean PaO2/FiO2 Ratio

Arterial blood gas measurements with cooximetry to evaluate arterial partial pressure of oxygen (PaO2) and fraction of inspired oxygen (FiO2) ratio. The mean PaO2/FiO2 ratio for each group after completion 8 hour of study participation was compared

Time frame:
8 hours
Reported as:
Mean · mmHg
Mean PaO2/FiO2 Ratio
mmHgImmediate Nitric Oxide TreatmentDelayed Nitric Oxide Treatment
Mean PaO2/FiO2 Ratio115.6 ± 40.6115.9 ± 40
Statistical analysis
  • Immediate Nitric Oxide Treatment vs Delayed Nitric Oxide Treatment · t-test, 2 sided · p = >0.05

Adverse events

Collected over All subjects were followed for 8 hours during study participation.. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Immediate Treatment With Nitric Oxide—0/24 (0%)0/24 (0%)
Delayed Treatment With Nitric Oxide—0/28 (0%)0/28 (0%)

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)Nitric Oxide FirstDelayed Nitric OxideTotal
<=18 years242852
Between 18 and 65 years000
>=65 years000
Age, Continuous
Age, Continuous(years)Nitric Oxide FirstDelayed Nitric OxideTotal
Mean9.93 ± 6.798.06 ± 6.288.84 ± 6.5
Sex: Female, Male
Sex: Female, Male(Participants)Nitric Oxide FirstDelayed Nitric OxideTotal
Female101424
Male141428
Region of Enrollment
Region of Enrollment(participants)Nitric Oxide FirstDelayed Nitric OxideTotal
United States242852
08

Study locations

1 site
  • The Children's Hospital of Philadelphia
    Philadelphia, Pennsylvania 19104, United States
09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Apr 24, 2015, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT00240487
Lead sponsor
Children's Hospital of Philadelphia
Collaborators
Mallinckrodt
Responsible party
Sponsor
First posted
Oct 18, 2005
Start date
Sep 2000
Primary completion
Sep 2008
Completion
Sep 2008
Results posted
Apr 24, 2015
Last update
Apr 24, 2015

Study contacts

Rodolfo I Godinez, MD, PhD
principal investigator · Children's Hospital of Philadelphia

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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