Molecule Removal and Ease of Use: A Comparison of Two Different Dialyzers

July 3, 2025 updated by: Vantive Health LLC

Urea, Phosphate and b2-Microglobulin Removal and Ease of Use: Comparing the Polyflux HD-C4 With the Polyflux 210H

The Polyflux HD-C4 (Gambro Renal Products) is a new dialyzer based on the existing Polyflux H membrane and dialyzer technology, but which achieves a performance comparable to Polyflux 210H in a significantly smaller device.

The objectives of this study are:

  1. To compare and contrast small and large molecule removal by the Polyflux HD-C4 and Polyflux 210H dialyzers under conditions of routine hemodialysis; and,
  2. To compare and contrast the ease of use of the Polyflux HD-C4 dialyzer with that of the Polyflux 210H under conditions of routine clinical use for hemodialysis.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
12

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

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

  • United States
    • Minnesota
      • Minneapolis, Minnesota, United States, 55404
        • DaVita Clinical Research Facility

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

14 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Adults 18 years of age or older
  • Stable hemodialysis prescription using Polyflux 210H or Polyflux 21R for at least 2 months prior to study enrollment
  • Dialyzing through a native fistula or Gore-Tex graft.
  • Blood access must be able to provide a blood flow rate of 400 ml/min.

Exclusion Criteria:

  • Non-compliance with dialysis
  • Hematocrit less than 28%
  • Active Infection

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: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Other: HD-C4 First, then 210H
Subjects will be randomly assigned to begin the first week of three consecutive treatments with the Polyflux HD-C4 dialyzer. Following the third treatment, the subjects will be switched to the Polyflux 210H dialyzer for a second week of three consecutive treatments. Therefore each subject will have a total of six consecutive dialysis treatments.
Device: Polyflux 210H dialyzer
Three consecutive treatments with the Polyflux 210H dialyzer. All study treatments will be performed in the standard hemodialysis mode.
Other Names:
  • Gambro Polyflux 210H dialyzer
Device: Polyflux HD-C4
Three consecutive treatments with the Polyflux HD-C4 dialyzer. All study treatments will be performed in the standard hemodialysis mode.
Other Names:
  • Gambro Revaclear
Other: 210H First, then HD-C4
Subjects will be randomly assigned to begin the first week of three consecutive treatments with the Polyflux 210H dialyzer. Following the third treatment, the subjects will be switched to the Polyflux HD-C4 dialyzer for a second week of three consecutive treatments. Therefore each subject will have a total of six consecutive dialysis treatments.
Device: Polyflux 210H dialyzer
Three consecutive treatments with the Polyflux 210H dialyzer. All study treatments will be performed in the standard hemodialysis mode.
Other Names:
  • Gambro Polyflux 210H dialyzer
Device: Polyflux HD-C4
Three consecutive treatments with the Polyflux HD-C4 dialyzer. All study treatments will be performed in the standard hemodialysis mode.
Other Names:
  • Gambro Revaclear

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Comparison of Urea Removal Under Conditions of Routine Hemodialysis.
Time Frame: 2 weeks = duration required for each subject to complete 6 consecutive dialysis treatments
Urea removal is correlated with successful clinical outcomes. Kt/V is a way of measuring the delivered dose of dialysis where K=clearance of urea, t=treatment time and V=volume of body water. Single-pool (sp) Kt/V assumes that urea is removed from a single compartment in the human body during dialysis. However, because there are multiple compartments in the human body, rebound occurs following hemodialysis which lowers the Kt/V. Equilibrated (e) Kt/V is an equation that has been devised to predict the amount of rebound based on the ratio of K/V. Outcomes are posted for both spKt/V and eKt/V.
2 weeks = duration required for each subject to complete 6 consecutive dialysis treatments
A Comparison of Pre- to Post-dialysis Reduction of Small and Large Molecules Under Conditions of Routine Hemodialysis.
Time Frame: 2 weeks = duration required for each subject to complete 6 consecutive dialysis treatments
Overall removal of urea, phosphorus and β2-microglobulin was determined from the pre- to post-dialysis change in plasma concentration and from the amount of solute recovered in the dialysate. This outcome measure is reported as the percentage of pre- to post-dialysis reduction of urea, phosphorus and β2-microglobulin.
2 weeks = duration required for each subject to complete 6 consecutive dialysis treatments

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Comparison of Dialyzer Ease of Use Between the Polyflux HD-C4 Dialyzer and the Polyflux 210H
Time Frame: 2 weeks = duration required for each subject to complete 6 consecutive dialysis treatments
Assessment of blood side priming: 1=Very Easy 2=Acceptable 3=Difficult 4=Very Difficult / Assessment of dialysate side priming: 1=Perfect 2=Acceptable 3= Not Acceptable / Appearance of dialyzer fibers: 1=Very Good 2=Good 3=Poor 4=Very Poor / Appearance of dialyzer arterial header: 1=Very Good 2=Good 3=Poor 4=Very Poor / Appearance of venous header: 1=Very Good 2=Good 3=Poor 4=Very Poor /
2 weeks = duration required for each subject to complete 6 consecutive dialysis treatments

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Vantive Health LLC

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Baxter Healthcare Corporation
Gambro Renal Products, Inc.

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Harry Alcorn Jr., PharmD, DaVita Clinical Research Facility

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

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
February 1, 2008

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 1, 2008

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
March 1, 2009

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
February 13, 2008

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 11, 2008

First Posted (Estimated)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
March 14, 2008

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
July 14, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 3, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
July 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • Gambro 1460

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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