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CompletedNCT00626028Updated Dec 20, 2019Results posted

Comparison of Inhaled Nitric Oxide and Oxygen in Participants Reactivity During Acute Pulmonary Vasodilator Testing

A Phase 3 interventional study of Nitric Oxide for inhalation and Oxygen in Idiopathic Pulmonary Arterial Hypertension and Cardiomyopathy, sponsored by Mallinckrodt. Completed at 18 sites in 5 countries. Open to participants aged 4 Weeks to 18 Years. Per ClinicalTrials.gov, last updated 2019-12-20.

Sponsored by Mallinckrodt · Phase 3, Interventional, and Diagnostic

From the registry’s dates

  • Registered 3 years 5 months after the study started (first participant enrolled Sep 2004, registered Feb 2008).
Phase
Phase 3
Study type
Interventional
Enrollment
136
Allocation
Randomized
Ages
4 Weeks to 18 Years
Sex
All
01

Study summary

The primary purpose of this study is to compare the number of participants with reversible pulmonary hypertension (vasoreactivity) due to nitric oxide for inhalation and oxygen as compared to 100% oxygen.

02

Conditions studied

  • Idiopathic Pulmonary Arterial Hypertension
  • Cardiomyopathy

Keywords

  • Pulmonary Vasculature
  • Nitric Oxide
  • INOmax®
  • Acute Lung Injury
  • Pulmonary Vasodilator Testing
  • Idiopathic Pulmonary Arterial Hypertension
  • Congenital Heart Disease
  • reversible pulmonary hypertension
  • vasoreactivity
  • Congenital Heart Disease with Pulmonary Hypertension
03

In context

Familial Primary Pulmonary Hypertension

352 studies on the registry are indexed under Familial Primary Pulmonary Hypertension; 35 are open to participants now.

This study's enrollment of 136 is above the median of 35 across 241 interventional studies indexed under Familial Primary Pulmonary Hypertension.

Browse Familial Primary Pulmonary Hypertension studies →

Lead sponsor

Mallinckrodt is the lead sponsor of 87 studies on the registry; none are open to participants now.

Of its 15 completed or terminated interventional studies of FDA-regulated products, 15 (100%) have results posted.

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

04

Who can participate

Ages eligible
4 Weeks to 18 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Must have any one of these three disease categories:

    • Idiopathic Pulmonary Arterial Hypertension

      • Mean pulmonary arterial pressure (PAPm) > 25 millimeters of mercury (mmHg) at rest, pulmonary capillary wedge pressure (PCWP) ≤ 15 mmHg, and PVRI> 3 u•m\^2 or diagnosed clinically with no previous catheterization
    • Congenital heart disease (CHD) with pulmonary hypertension repaired and unrepaired

      • PAPm > 25 mmHg at rest and PVRI> 3 u•m\^2 or diagnosed clinically with no previous catheterization
    • Cardiomyopathy

      • PAPm > 25 mmHg at rest and Pulmonary vascular resistance index (PVRI)> 3 u•m\^2 or diagnosed clinically with no previous catheterization
  2. Scheduled to undergo right heart catheterization to assess pulmonary vasoreactivity by acute pulmonary vasodilation testing.
  3. Male or female, ages 4 weeks to 18 years, inclusive
  4. Signed informed consent/assent

Exclusion criteria

Exclusion Criteria:

  1. Focal pulmonary infiltrates on chest radiograph.
  2. Diagnosed with severe obstructive or restrictive pulmonary disease that is significantly contributing to the patient's pulmonary hypertension.
  3. Received treatment with nitric oxide for inhalation within 30 days prior to study initiation, are on other investigational medications, nitroglycerin, sodium nitroprusside, sildenafil, other Phosphodiesterase type 5 (PDE-5) inhibitors, or prostacyclin
  4. Pregnant [urine human chorionic gonadotropin positive (HCG +)]
  5. Baseline Pulmonary capillary wedge pressure (PCWP) > 20 mmHg
05

Study design

Phase
Phase 3
Primary purpose
Diagnostic
Allocation
Randomized
Intervention model
Crossover assignment
Masking
None (open label)
Enrollment
136 participants (actual)

Study arms

  • Experimental
    Nitric Oxide First, Oxygen Last

    10 minute dose of Nitric Oxide (NO) at 80 ppm, then 10 minute dose of NO plus Oxygen, then 10 minute washout, then 10 minute dose of 100% Oxygen on Day 1.

    Drug: Nitric Oxide for inhalation · Drug: Oxygen · Drug: Nitric Oxide plus Oxygen

  • Experimental
    Oxygen First, Nitric Oxide Last

    10 minute dose of 100% Oxygen, then 10 minute dose of NO plus Oxygen, then 10 minute washout, then 10 minute dose of NO at 80 ppm on Day 1.

    Drug: Nitric Oxide for inhalation · Drug: Oxygen · Drug: Nitric Oxide plus Oxygen

Interventions

  • Nitric Oxide (NO) for inhalation, given at 80ppm over 10 minutes using an INOvent® delivery system

    Also known as: INOmax®

  • DrugOxygen

    100% oxygen (O2) for inhalation, given at 80ppm over 10 minutes using an INOvent® delivery system

  • DrugNitric Oxide plus Oxygen

    Drug pages: Nitric Oxide · Oxygen

    Nitric Oxide (NO) for inhalation plus oxygen, given at 80ppm over 10 minutes using an INOvent® delivery system

    Also known as: Inhaled Nitric Oxide, Oxygen

06

What researchers measure

Primary outcomes

  1. Number of Participants With Reversible Pulmonary Hypertension (Vasoreactivity)

    A composite of hemodynamic measurements were used to identify reversible pulmonary hypertension (vasoreactivity)

    Time frame: on Day 1

Secondary outcomes

  1. Number of Participants With Related Surgical Procedures Within 1 Year

    Number of participants who received surgery for pulmonary or cardiac disease within 1 year after treatment.

    Time frame: within 1 year

  2. Number of Participants With Adverse Events (AEs)

    An AE was defined as any untoward medical occurrence. An AE need not have a causal relationship with treatment and included any event that was not seen at baseline or, if present at baseline, increased in severity.

    Time frame: on Day 1

  3. Number of Participants With Serious Adverse Events (SAEs)

    SAEs were collected during the 12 hours after discontinuation of gas or discharge (whichever came first). An SAE was defined as any event that resulted in death, was life threatening, resulted in permanent disability or incapacity, required or prolonged inpatient hospitalization, or was a congenital anomaly. Important medical events that, without medical or surgical intervention, would also have resulted in one of the outcomes listed above were also considered as SAEs.

    Time frame: within 12 hours

  4. Number of Participants With Related Surgical Procedures Within 3 Years

    Number of participants who received surgery related to pulmonary or cardiac disease within 3 years

    Time frame: within 3 years

07

Results

Posted Sep 16, 2010
Limitations and caveats
Although the first and last treatments were randomly assigned, the second treatment was always the same. Therefore, a time/treatment interaction cannot be ruled out.

Participant flow

Children scheduled for clinically indicated right heart catheterization were screened for enrollment at 16 centers in the United States, United Kingdom, France, Spain and Netherlands.

Participant flow — Overall Study
MilestoneNitric Oxide First, Oxygen LastOxygen First, Nitric Oxide Last
Started6868
Completed6259
Not completed69
Withdrew: Adverse event11
Withdrew: Device failure01
Withdrew: Physician decision21
Withdrew: Inclusion/exclusion criteria36

Outcome measures

PrimaryNumber of Participants With Reversible Pulmonary Hypertension (Vasoreactivity)

A composite of hemodynamic measurements were used to identify reversible pulmonary hypertension (vasoreactivity)

Time frame:
on Day 1
Reported as:
Count of participants · Participants
Number of Participants With Reversible Pulmonary Hypertension (Vasoreactivity)
ParticipantsNitric Oxide First, Oxygen LastOxygen First, Nitric Oxide Last
Number of Participants With Reversible Pulmonary Hypertension (Vasoreactivity)2816
SecondaryNumber of Participants With Related Surgical Procedures Within 1 Year

Number of participants who received surgery for pulmonary or cardiac disease within 1 year after treatment.

Time frame:
within 1 year
Reported as:
Count of participants · Participants
Number of Participants With Related Surgical Procedures Within 1 Year
ParticipantsNitric Oxide First, Oxygen LastOxygen First, Nitric Oxide Last
Number of Participants With Related Surgical Procedures Within 1 Year4421
SecondaryNumber of Participants With Adverse Events (AEs)

An AE was defined as any untoward medical occurrence. An AE need not have a causal relationship with treatment and included any event that was not seen at baseline or, if present at baseline, increased in severity.

Time frame:
on Day 1
Reported as:
Count of participants · Participants
Number of Participants With Adverse Events (AEs)
ParticipantsNitric Oxide First, Oxygen LastOxygen First, Nitric Oxide Last
Number of Participants With Adverse Events (AEs)52
SecondaryNumber of Participants With Serious Adverse Events (SAEs)

SAEs were collected during the 12 hours after discontinuation of gas or discharge (whichever came first). An SAE was defined as any event that resulted in death, was life threatening, resulted in permanent disability or incapacity, required or prolonged inpatient hospitalization, or was a congenital anomaly. Important medical events that, without medical or surgical intervention, would also have resulted in one of the outcomes listed above were also considered as SAEs.

Time frame:
within 12 hours
Reported as:
Count of participants · Participants
Number of Participants With Serious Adverse Events (SAEs)
ParticipantsNitric Oxide First, Oxygen LastOxygen First, Nitric Oxide Last
Number of Participants With Serious Adverse Events (SAEs)30
SecondaryNumber of Participants With Related Surgical Procedures Within 3 Years

Number of participants who received surgery related to pulmonary or cardiac disease within 3 years

Time frame:
within 3 years
Reported as:
Count of participants · Participants
Number of Participants With Related Surgical Procedures Within 3 Years
ParticipantsNitric Oxide First, Oxygen LastOxygen First, Nitric Oxide Last
Number of Participants With Related Surgical Procedures Within 3 Years126

Adverse events

Collected over within 3 years. Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Nitric Oxide First, Oxygen Last—3/62 (4.8%)0/62 (0%)
Oxygen First, Nitric Oxide Last—0/59 (0%)0/59 (0%)
Most frequent serious events
Most frequent serious events
EventNitric Oxide First, Oxygen LastOxygen First, Nitric Oxide Last
ST Segment ElevationInvestigations1/620/59
BradycardiaCardiac disorders1/620/59
Pulmonary HypertensionRespiratory, thoracic and mediastinal disorders1/620/59
Cardiac ArrestCardiac disorders1/620/59
HypotensionVascular disorders1/620/59
Low Cardiac Output SyndromeCardiac disorders1/620/59
Decreased oxygen saturationInvestigations1/620/59

Baseline characteristics

The intent-to-treat (ITT) population was defined as all participants randomized regardless of actual receipt of treatment gas, the treatment gas actually received, or the appropriateness of their enrollment.

Age, Categorical
Age, Categorical(Participants)Nitric Oxide First, Oxygen LastOxygen First, Nitric Oxide LastTotal
<=18 years6868136
Between 18 and 65 years000
>=65 years000
Age, Continuous
Age, Continuous(years)Nitric Oxide First, Oxygen LastOxygen First, Nitric Oxide LastTotal
Mean5.9 ± 5.585.9 ± 5.585.9 ± 5.58
Sex: Female, Male
Sex: Female, Male(Participants)Nitric Oxide First, Oxygen LastOxygen First, Nitric Oxide LastTotal
Female343468
Male343468
Region of Enrollment
Region of Enrollment(participants)Nitric Oxide First, Oxygen LastOxygen First, Nitric Oxide LastTotal
France302757
United States151732
Spain121224
Netherlands5611
United Kingdom6612
08

Study locations

18 sites
  • Lucile Salter Packard Children's Hospital at Stanford
    Stanford, California 94304, United States
  • The Children's Hospital
    Denver, Colorado 80218, United States
  • Children's Hospital Boston
    Boston, Massachusetts 02115, United States
  • St. Louis Children's Hospital
    St Louis, Missouri 63110, United States
  • New York Presbyterian Hospital
    New York, New York 10032, United States
  • Cincinnati Children's Hospital
    Cincinnati, Ohio 45229, United States
  • Columbus Children's Hospital
    Columbus, Ohio 43205, United States
  • The Medical University of South Carolina
    Charleston, South Carolina 29425, United States
  • CHU Timone - Département de cardiologie
    Marseille, France
  • Hôpital d'Enfants
    Nancy, France
  • Hôpital NECKER - Enfants Malades
    Paris, France
  • Beatrix Children's Hospital / University Hospital Groningen
    Groningen, Netherlands
  • Hospital Sant Joan de Déu de Barcelona
    Barcelona, Spain
  • Unidad de Cardiologia Infantil - Hospital Vall d'Hebrón
    Barcelona, Spain
  • Hospital Gregorio Maranon
    Madrid, Spain
  • Instituto Pediátrico del Corazón - Hospital Materno Infatil Doce de Octubre
    Madrid, Spain
  • Royal Brompton Hospital
    London, United Kingdom
  • Southampton University Hospitals Trust - Wessex Cardiothoracic Centre
    Southampton, United Kingdom
09

References and documents

Publications

  • Barst RJ, Agnoletti G, Fraisse A, Baldassarre J, Wessel DL; NO Diagnostic Study Group. Vasodilator testing with nitric oxide and/or oxygen in pediatric pulmonary hypertension. Pediatr Cardiol. 2010 Jul;31(5):598-606. doi: 10.1007/s00246-010-9645-5. Epub 2010 Apr 20. PubMed 20405117 ↗

Individual participant data

Plan to share: No

10

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Sep 2004 to primary completion in Feb 2010, 65 months.

Results were first posted in Sep 2010, 7 months after primary completion.

Of 26 phase 3 interventional studies under Familial Primary Pulmonary Hypertension, half reached primary completion within 68 months of starting (the median), counting those still running; a quarter within 36 and three quarters within 95. This study's 65 months is close to that.

How these figures are worked out, and which studies are left out of them.

Registered
Feb 20, 2008
First posted
Feb 29, 2008
StartActual
Sep 2004
Primary completionActual
Feb 2010
CompletionActual
Feb 2010
Results first posted
Sep 16, 2010
Last update
Dec 20, 2019
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Dec 20, 2019, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT00626028
Lead sponsor
Mallinckrodt
Responsible party
Sponsor
First posted
Feb 29, 2008
Start date
Sep 2004
Primary completion
Feb 2010
Completion
Feb 2010
Results posted
Sep 16, 2010
Last update
Dec 20, 2019

Study contacts

Global Clinical Leader, MD
study director · Mallinckrodt

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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Studies of the drugs tested here: Nitric Oxide · Oxygen

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