Chemoreflex Sensitivity in Chronic Kidney Disease

November 19, 2008 updated by: RWTH Aachen University

Hyperoxic Chemoreflex Sensitivity in Chronic Kidney Disease

Cardiovascular morbidity and mortality are markedly increased in chronic kidney disease (CKD) and may be explained in part by sympathetic hyperactivity. Impaired hyperoxic chemoreflex sensitivity (CHRS) has been attributed to an increased sympathetic activity. The aim of the present study is to examine whether chemosensor function is altered in patients with stage 3 and stage 4 CKD.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Impaired hyperoxic chemoreflex sensitivity (CHRS) is assessed in patients with stage 3 CKD [glomerular filtration rate (GFR) 30-59 ml/min/1.73 m2], in patients with stage 4 CKD [GFR 15-29 ml/min/1.73 m2], as well as in patients without any evidence of CKD. CHRS is measured by determination of the venous partial pressure of oxygen and the heart rate before and after deactivation of the chemoreceptors by inhalation of pure oxygen. The difference in the R-R intervals before and after inhalation divided by the difference in the oxygen pressures is calculated as the CHRS. A CHRS below 3.0 ms/mmHg is defined as pathological. It should be shown that using a simple clinical bedside test we provide the first evidence for impaired hyperoxic chemoreflex sensitivity in stage 3 and 4 chronic kidney disease. We thereby may lay the basis for future intervention studies assessing chemosensor function in these patients.

Study Type

Observational

Enrollment (Actual)

65

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

  • Germany
    • NRW
      • Aachen, NRW, Germany, 52074
        • Department of Medicine, Division of Cardiology, Pulmonology and Vascular Medicine

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 to 90 years (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Patients suffering from CDK stage 3 (GFR 30-59 ml/min/1.73 m²) or stage 4 (GFR 15-29 ml/min/1.73 m²)
  • For the reference Patients without evidence for CDK

Exclusion Criteria:

  • Patients with heart failure, history of myocardial infarction or instable angina pectoris, atrial fibrillation, hyperthyroidism, chronic pulmonary diseases, sleep apnoea syndrome, alcohol abuse and drug induced cardiomyopathy

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

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
1
Patients with stage 3 CKD
Other: blood sampling
2
Patients with stage 4 CKD
Other: blood sampling
3
Patients without evidence for CDK
Other: blood sampling

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Hyperoxic chemoreflex sensitivity is impaired in patients with moderate to severe chronic kidney disease

Collaborators and Investigators

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

Sponsor

RWTH Aachen University

Collaborators

Heinrich-Heine University, Duesseldorf
SLK Kliniken Heilbronn GmbH

Investigators

  • Principal Investigator: Christian Meyer, MD, RWTH Aachen University Departement of Cardiology, Pulmonology and Vascular Medicine

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

January 1, 2007

Primary Completion (Actual)

November 1, 2008

Study Completion (Actual)

November 1, 2008

Study Registration Dates

First Submitted

November 19, 2008

First Submitted That Met QC Criteria

November 19, 2008

First Posted (Estimate)

November 20, 2008

Study Record Updates

Last Update Posted (Estimate)

November 20, 2008

Last Update Submitted That Met QC Criteria

November 19, 2008

Last Verified

November 1, 2008

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • Chemoreflex-Sensitivity-Study

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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