Inhaled Nitric Oxide in Pulmonary Embolism

June 22, 2010 updated by: Medical University of Vienna

Inhaled Nitric Oxide in Pulmonary Embolism, a Randomized, Double-Blind Placebo-Controlled Study

The purpose of the study is to determine if inhaled nitric oxide, a potent and selective pulmonary vasodilator, is beneficial in patients with acute pulmonary embolism causing increased right ventricular afterload.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

The early phase of severe pulmonary embolism is associated with high mortality. Right ventricular failure induced by the increase in right ventricular afterload is the final cause of deterioration leading to circulatory failure in patients who die from severe pulmonary embolism. Therefore, reduction of right ventricular afterload remains the central therapeutic strategy. In acute pulmonary embolism, the increase in pulmonary vascular resistance is caused by reduction in the cross-sectional area of the pulmonary vascular bed from obstructing emboli. Pulmonary arterial constriction further increases pulmonary vascular resistance, whereby vasoactive humoral factors may be contributing, which are released from activated platelets accumulating at the site of the clot. Consequently, administration of vasodilators of the pulmonary circulation may be regarded as a therapeutic option to antagonize increased pulmonary vasoconstriction or compensate for impaired vasodilation. Inhaled nitric oxide (NO) acts as a powerful selective pulmonary vasodilator. The aim of the study is to determine, if short-term inhalation of NO is beneficial in respiratory compromised patients with right ventricular dysfunction after acute pulmonary embolism.

Study Type

Interventional

Enrollment (Anticipated)

30

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Austria
      • Vienna, Austria, 1090
        • University of Emergency Medicine, Medical University of Vienna

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Patients with acute pulmonary embolism within 24 hours after onset of symptoms.
  • Patients with hypoxaemia not present before pulmonary embolism and acute right ventricular dysfunction.

Exclusion Criteria:

  • Age < 18 years.
  • Chronic lung disease, left heart failure, suspected or documented intracranial bleeding.
  • Pregnancy, Methaemoglobinaemia.
  • Patients who previously needed thrombolysis or surgical embolectomy.
  • Negative D-Dimer test.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: Triple

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
right ventricular size and arterial oxygenation
Time Frame: 2 hours
2 hours

Secondary Outcome Measures

Outcome Measure
Time Frame
blood pressure, central venous pressure, right ventricular function, pulmonary artery pressure
Time Frame: 2 hours
2 hours

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Medical University of Vienna

Investigators

  • Principal Investigator: Peter Schenk, Prof MD MSc, Dpt. of Internal Medicine III, Medical University Vienna, Austria

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

March 1, 2005

Primary Completion (Actual)

July 1, 2009

Study Completion (Actual)

December 1, 2009

Study Registration Dates

First Submitted

November 28, 2007

First Submitted That Met QC Criteria

November 28, 2007

First Posted (Estimate)

November 29, 2007

Study Record Updates

Last Update Posted (Estimate)

June 23, 2010

Last Update Submitted That Met QC Criteria

June 22, 2010

Last Verified

June 1, 2010

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 3052001

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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