Uremic Pruritus, Cytokines and Polymethylmethacrylate Artificial Kidney

March 1, 2007 updated by: China Medical University Hospital

Background: Uremic pruritus is one of the common complications in long-term dialysis patients. In general, many factors including xerosis, elevated serum calcium, phosphate, calcium-phosphate product, hyperparathyroidism and inadequate dialysis may contribute to it. Recently, researchers reported that immuno-hypothesis with high serum level of cytokines could be the cause of uremic pruritus. Polymethylmethacrylate (PMMA) artificial kidney (AK) has been reported to adsorb more serum cytokines than other high flux artificial kidneys.

Methods: In July 2006, 30 patients with severe uremic pruritus from 300 chronic hemodialysis patients in a single center entered this prospective study. Their dialyzers were changed to PMMA AK for 4 weeks. The severity of pruritus was evaluated every week using the results of a questionnaire (pruritus score). Laboratory assays including pre-dialysis serum blood urea nitrogen, creatinine, β2-microgblubulin (β2M), calcium, phosphate, intact parathyroid hormone (iPTH), total CO2, ferritin, hematocrit, high sensitivity C-reactive protein (hsCRP), IL-1, IL-2, IL-6, IL-18, TNF-α, KT/V and β2M clearance were measured before and at the end of 4 weeks of PMMA AK use.

Expected Results:To prove the PMMA membrane could improve the uremic pruritus and to reveal the effect of PMMA membrane on serum level of possible factors contributing to uremic pruritus.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment

30

Phase

  • Phase 4

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

  • Taiwan
      • Taichung, Taiwan, 404
        • China Medical University Hospital

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

26 years to 82 years (ADULT, OLDER_ADULT)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Patients with chronic pruritus (>3 months) were screened using traditional visual analogue scale (VAS) and then scored using a pruritus questionnaire (pruritus scoring system).
  • Other inclusion criteria were that patients enrolled should be dialysed for 4 hours, three times a week, with KT/V >1.2, serum albumin> 3.0 mg/dl, hematocrit > 24%, ferritin < 900 ng/ml, phosphate <7 mg/dl, corrected calcium <11 mg/dl, calcium-phosphate product < 70, intact parathyroid hormone (iPTH) <600 pg/ml, and normal serum level of alanine aminotransferase and bilirubin in past 3 months.

Exclusion Criteria:

  • Pruritus unrelated to renal failure
  • Evidence of malignancy
  • Liver cirrhosis diagnosed by echogram or admission within 3 months of the start of the study.

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: NON_RANDOMIZED
  • Interventional Model: SINGLE_GROUP
  • Masking: NONE

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Improvement of uremic pruritus

Secondary Outcome Measures

Outcome Measure
Change of serum level of cytokines

Collaborators and Investigators

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

Sponsor

China Medical University Hospital

Investigators

  • Study Director: Chiu-Ching Huang, MD, China Medical University Hospital

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

July 1, 2006

Study Completion

September 1, 2006

Study Registration Dates

First Submitted

March 1, 2007

First Submitted That Met QC Criteria

March 1, 2007

First Posted (ESTIMATE)

March 2, 2007

Study Record Updates

Last Update Posted (ESTIMATE)

March 2, 2007

Last Update Submitted That Met QC Criteria

March 1, 2007

Last Verified

March 1, 2007

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • DMR95-IRB-79

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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