Hemocontrol and Blood Pressure Control in Dialysis Patients

April 27, 2006 updated by: Université de Montréal

Assessment of Hemocontrol Biofeedback System Efficiency on Long Term Blood Pressure Control, Nursing Interventions, and Quality of Life in Hemodialysis Patients: a Randomized Controlled Trial

Volume overload contributes significantly to the pathogenesis of hypertension in hemodialysis patients. The Hemocontrol(HC)system (Gambro), which automatically adjusts ultrafiltration rate and dialysate conductivity according to blood volume variations during dialysis, has been suggested to improve hemodynamic tolerance and thus facilitate fluid removal.

This randomized controlled trial was designed to compare the use of HC with standard hemodialysis to test the hypothesis that the use of the HC system may lower home blood pressure in comparison with standard hemodialysis as a primary endpoint. Secondary endpoints are a variation in the percentage of dialysis sessions requiring nurses' interventions for intra-dialytic hypotension and a change in the health-related quality of life of HD patients.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Hypertension is a common problem in patients undergoing chronic maintenance hemodialysis (HD) with a reported prevalence of 50 to 90 % [Hörl, 2002]. As a major risk factor for cardiovascular disease, hypertension contributes to the high rate of morbidity and mortality in ESRD patients [Foley, 1996; Port, 1999]. For a majority of dialysis patients, volume overload (VO) plays a major role in the pathogenesis of hypertension [Fishbane, 1996; Rahman, 2000; Ventura, 1997] and removing excess volume can often normalize blood pressure [Fishbane, 1996]. Unfortunately, correcting VO frequently proves to be difficult because of hemodynamic instability during HD sessions. As much as 20 to 50% of dialysis patients present with symptoms of intradialytic hypotension (IDH) [Santoro, 2002]. IDH increases nursing work load and negatively affects the efficacy of dialysis and the quality of life of HD patients. Different measures are used to avoid IDH, such as limitation of salt and water intake, avoidance of antihypertensive medication before dialysis, utilization of low temperature dialysate, and modeling of ultrafiltration and/or dialysate conductivity. These measures often generate mixed results.

The Hemocontrol (HC) biofeedback system (Gambro®) has been reported to reduce hemodynamic instability and hypotensive episodes during hemodialysis [Basile, 2001; Begin, 2002; Ronco, 2000; Santoro, 1994; Santoro, 1998; Santoro, 2002; Wolkotte, 2002]. The HC system consists in a fully integrated biofeedback system that monitors and regulates blood volume contraction during hemodialysis through software-driven adjustments of ultrafiltration rate and dialysate conductivity. By improving hemodynamic tolerance during dialysis, the use of the HC system has been suggested to facilitate fluid removal and correction of VO, leading to improved control of hypertension.

The present randomized controlled trial was designed to test the hypothesis that the use of the HC system would lower home BP in comparison with standard hemodialysis as a primary endpoint. Secondary endpoints are a variation in the percentage of HD sessions requiring nurses' interventions and a change in the health-related quality of life of HD patients.

Study Type

Interventional

Enrollment

60

Phase

  • Phase 3

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

  • Canada
    • Quebec
      • Montreal, Quebec, Canada, H4J 1C5
        • Hopital du Sacre-Coeur de Montreal

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

14 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • 18 years or older
  • chronic hemodialysis
  • on renal replacement therapy > 3 months
  • at least 3 dialysis sessions and 9 hours of therapy weekly
  • willing to measure blood pressure at home
  • able to sign an informed consent

Exclusion Criteria:

  • anticipated change in renal replacement therapy
  • anticipated transfer to another center
  • planned renal transplantation
  • enrollment in another clinical trial

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: Parallel Assignment
  • Masking: None (Open Label)

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Difference from baseline to end of study in ambulatory blood pressure control

Secondary Outcome Measures

Outcome Measure
Episodes of intra-dialytic hypotension requiring nursing interventions
Health-related quality of life (using the Kidney Disease and Quality of Life Short Form)

Collaborators and Investigators

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

Sponsor

Université de Montréal

Collaborators

Gambro Renal Products, Inc.

Investigators

  • Principal Investigator: Francois Madore, MD, Faculty of Medicine, University of Montreal

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

  • C. Déziel, M. Zellweger, R. Comeau, A. Valleau, S. Raymond-Carrier, F. Madore. Home Blood Pressure Management with Automated Blood Volume Regulation in Hemodialysis Patients: A Prospective Randomized Controlled Trial. J. Am. Soc. Nephrol. 15:594A, October 2004.
  • C. Déziel, M. Zellweger, R. Comeau, M. Kerangueven, S. Raymond-Carrier, F. Madore. Hemodynamic Stability during Hemodialysis and Quality of Life with Automated Blood Volume Regulation: A Prospective Randomized Controlled Trial. J. Am. Soc. Nephrol. 15:47A, October 2004

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

December 1, 2002

Study Completion

July 1, 2003

Study Registration Dates

First Submitted

April 27, 2006

First Submitted That Met QC Criteria

April 27, 2006

First Posted (Estimate)

April 27, 2006

Study Record Updates

Last Update Posted (Estimate)

April 27, 2006

Last Update Submitted That Met QC Criteria

April 27, 2006

Last Verified

September 1, 2003

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • HC-01

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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