Noninvasive Measurement of Cardiac Output in Pulmonary Hypertension Using Inert Gas Rebreathing

February 18, 2014 updated by: Medical University of Graz
The study hypothesis is that accuracy of CO measurement by IGR does not differ from classical CO measurement methods such as thermodilution or direct Fick method. This is why the study aims to determine whether non invasive cardiac output (CO) measurement using inert gas rebreathing (IGR)is a suitable method in patients with pulmonary hypertension. In order to examine this, the IGR method will be used in patients undergoing diagnostic or follow-up right heart catheterization.

Study Overview

Status

Completed

Conditions

Detailed Description

Inert Gas Rebreathing method enables non invasive measurement of cardiac output (CO) using the single rebreathing method. A mixture of blood soluble (N2O) and blood insoluble gas (SF6) and environmental air is inhaled and the amount of N2O, SF6, O2 and CO2 is measured by a photoacoustic analysator. The length of a measurement is about 1 minute.

As the gold standard measurement of CO is performed invasively, there is an urgent need for the development of non-invasive tools like IGR.

Study Type

Observational

Enrollment (Actual)

34

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
      • Graz, Austria
        • Ludwig Boltzmann Institute for Lung Vascular Research

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

Sampling Method

Non-Probability Sample

Study Population

The study population consists of patients undergoing diagnostic or follow-up right heart cathereization.

Description

Inclusion Criteria:

  • Written informed consent
  • Patients who undergo right heart catheterization

Exclusion Criteria:

  • Missing written informed consent

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

  • Observational Models: Cohort
  • Time Perspectives: Prospective

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Cardiac output
Time Frame: at baseline
at baseline

Collaborators and Investigators

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

Sponsor

Medical University of Graz

Collaborators

Ludwig Boltzmann Gesellschaft

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

February 1, 2012

Primary Completion (Actual)

February 1, 2014

Study Completion (Actual)

February 1, 2014

Study Registration Dates

First Submitted

May 24, 2012

First Submitted That Met QC Criteria

May 24, 2012

First Posted (Estimate)

May 28, 2012

Study Record Updates

Last Update Posted (Estimate)

February 19, 2014

Last Update Submitted That Met QC Criteria

February 18, 2014

Last Verified

February 1, 2014

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 24-079 ex 11/12

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

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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