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Noninvasive Determination of Cerebral Tissue Oxygenation in Pulmonary Hypertension

NCT01463514 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 20

Last updated 2015-11-16

No results posted yet for this study

Summary

To study the effect of acute pulmonary vasodilatation on cerebral tissue oxygenation (CTO) and cerebral blood flow (CBF) as indicator for cerebrovascular autoregulation in comparison to the effects of supplemental oxygen, decreased carbon dioxide by hyperventilation and exercise in patients with pulmonary hypertension (PH) undergoing clinically indicated right heart catheterisation (RHC).

Oxygenation and hemodynamic parameters will be assessed during RHC according to standard procedures. Non-invasive near infrared spectroscopy (NIRS) and a nasal canula will be additionally applied to measure CTO, CBF and endtidal CO2 (EtCO2). All parameters will be obtained at rest breathing room air, during an oxygen challenge, during standardized hyperventilation, under vasodilatation testing and during exercise in random, single-blinded sequences (except for exercise and hyperventilation). Pulmonary, systemic and cerebral oxygenation parameters and hemodynamics will be correlated with each other and functional class, quality of life, exercise and cognitive assessments at the time of the RHC and after three month.

Conditions

  • Pulmonary Hypertension

Interventions

PROCEDURE

Right heart catheterization

Oxygenation and hemodynamic parameters will be assessed during RHC according to standard procedures. All measurements will be noted as usual for PH assessment including: at rest breathing room air, during an oxygen challenge, under vasodilator testing with NO and/or during exercise. Room air, supplemental oxygen and NO will be applied over common breathing mask while patient is in a supine position. Oxygen will be taken as usual from the common adjustable hospital wall access, NO will be taken according to usual clinical practice during RHC from a gas cylinder connected to a reservoir, where adequate ppm concentration can be regulated. A dose of 40 ppm NO will be used according to common practise. Oxygen delivery to maintain the peripheral oxygen saturation between 88% and 90% will be adjusted over a 3 minute period of time.

PROCEDURE

Near-infrared spectroscopy

For study purpose, patients will have additional non-invasive NIRS assessment. The measurement will take place during right heart catheterization.

Sponsors & Collaborators

  • University of Zurich

    lead OTHER

Principal Investigators

  • 01 Studienregister MasterAdmins · UniversitaetsSpital Zuerich

  • Silvia Ulrich Somaini, MD · University Hospital Zurich, Division of Pneumology

Study Design

Allocation
RANDOMIZED
Purpose
DIAGNOSTIC
Masking
SINGLE
Model
PARALLEL

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2011-09-30
Primary Completion
2013-06-30
Completion
2014-06-30

Countries

  • Switzerland

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT01463514 on ClinicalTrials.gov