- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03851185
Combining Bioimpedance and Blood Volume Measurements in Haemodialysis
Individualised Fluid Management in Haemodialysis: Combining Bioimpedance and Absolute Blood Volume Measurements for Improved Clinical Effectiveness and Patient Experience
Around 60,000 patients in the UK are being treated for severe kidney failure. The most common treatment is haemodialysis (HD). An important part of HD is removing extra fluid from the body which the kidneys normally remove in urine. Deciding how much fluid to remove is not easy. It is normally based on clinical signs, such as blood pressure or tissue swollen with fluid, but there is a need for better tests to help guide these decisions.
Bioimpedance tests are one way of measuring fluid status. They involve passing a small electric current through tissue using stickers on the skin. The test is portable, cheap, simple, painless and harmless. One bioimpedance device, the Body Composition Monitor (BCM), has been designed particularly for kidney patients. However the BCM measures fluid in the whole body and cannot tell us how much fluid is in the blood (the blood volume), which has the biggest effect on patients' health.
The aim of this study is to see whether blood volume measurements can help to make fluid management more individualised. This could reduce the impact of dialysis on patients' health and improve patients' experience of the treatment.
Objective 1: To demonstrate whether the addition of blood volume measurements can help to tailor fluid management to HD patients' individual needs. In particular we will look at how body size, nutritional state, age and localised fluid can affect patients' blood volume.
Objective 2: To see if there is a simple way of making blood volume measurements with no need for expertise or extra equipment.
It is planned to recruit 40 patients into 4 clinically different groups and compare results between them.
The results will be compared between groups to help us understand how decisions about fluid management can be tailored to keep blood volume at the optimal level.
Study Overview
Status
Conditions
Study Type
Enrollment (Anticipated)
Contacts and Locations
Study Locations
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Leeds, United Kingdom, LS9 7TF
- Recruiting
- St James's University Hospitals NHS Trust
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Contact:
- David Keane
- Phone Number: 01132064119
- Email: david.keane@nhs.net
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Cohort 1 - Reference group: This group is intended to represent HD patients who have normal fluid status and normal compartmental fluid volumes.
Inclusion criteria:
- Ultrafiltration volumes in the preceding two weeks of less than 0.5 litres;
- pre-HD BCM-measured OH <1.1 litres; pre-HD blood pressure <140/90.
Cohort 2 - High BMI group: This group is intended to represent patients with high BMI who routinely finish dialysis with significant fluid depletion, as defined by BCM, without intradialytic symptoms.
Inclusion criteria:
- BMI>30 with target weight > 1.1 kg below normally hydrated weight;
- no recorded symptoms related to fluid removal in the preceding 2 weeks.
Cohort 3 - Low LTI group: This group is intended to represent patients who have a low LTI and who routinely finish dialysis with a degree of excess fluid as defined by BCM.
Inclusion criteria:
- LTI < 10kg/m2 with target weight > 1.1 kg above normally hydrated weight.
Cohort 4 - Localised oedema group: This group is intended to represent patients who have localised lower limb oedema.
Inclusion criteria:
- Oedema as defined by pitting
Study Plan
How is the study designed?
Design Details
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Measurement of post-dialysis blood volume (ABV) in the high BMI group.
Time Frame: 10 mins
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Absolute blood volume measurements: ABV measurements will be made based on the infusion of ultra-pure dialysate into the extracorporeal blood circuit and the analysis of the effect of the dilution on RBV.
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10 mins
|
Measurement of post-dialysis blood volume (ABV) in the low lean tissue index (LTI) cohort
Time Frame: 10 Mins
|
Absolute blood volume measurements: ABV measurements will be made based on the infusion of ultra-pure dialysate into the extracorporeal blood circuit and the analysis of the effect of the dilution on RBV.
|
10 Mins
|
Measurement of post-dialysis blood volume (ABV) in the localised oedema cohort
Time Frame: 10 mins
|
Absolute blood volume measurements: ABV measurements will be made based on the infusion of ultra-pure dialysate into the extracorporeal blood circuit and the analysis of the effect of the dilution on RBV.
|
10 mins
|
Collaborators and Investigators
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Anticipated)
Study Completion (Anticipated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Other Study ID Numbers
- RL18/109517
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
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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