An interventional study of Bioimpedance analysis in Hemodialysis, sponsored by Per Ivarsen. Recruiting at 1 site in Denmark. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-09-03.
Sponsored by Per Ivarsen · Not applicable, Interventional, and Other
In connection with dialysis treatment, fluid and salt balance changes. Some kidney disease patients experience fluid accumulation in the body and need to have excess fluid removed via the dialysis machine. Others have too little fluid in their bodies and experience general symptoms. The amount of fluid that needs to be removed is an individual assessment and can be difficult to determine. Today, fluid removal is determined based on signs such as water in the lungs, swollen legs, and blood pressure. By using a so-called bioimpedance spectroscopy (BIS) device, it os possible measure how much fluid is in the body. However, the calculations that BIS devices use are developed for healthy individuals and do not work optimally during dialysis. Therefore, the investigators will use the actual measurements and compare them with fluid extraction and weight changes to examine their relationship. Hemodialysis patients with ultrafiltration on 3 consecutive dialysis days in order to investigate whether there is a difference in measurements after the long dialysis break and whether the measurements are the same when you are being drawn to your dry weight are included. Other patients without fluid removed during dialysis will be investigated once. I the study the absolute blood volume is also measured, that is, how much fluid is in the bloodstream. This is also an expression of the body's total fluid volume. By combining the various measurements, the study will gain increased knowledge about your hydration status. If the measurement methods have sufficient precision, the use of BIS and measurement of total blood volume may contribute to a more accurate determination of your dry weight.
To investigate whether raw impedance data from BIS measurements can be used as a tool to estimate changes in fluid status in HD patients. Accuracy is low when using prediction equations that are integrated into the individual BIS device. This challenges the application in clinical practice. Furthermore, the prediction equation is not available for most devices. Small studies suggest greater accuracy when using raw data, which could make BIS measurements clinically applicable. Detailed purpose. To examine whether raw impedance data from BIS measurements can be used as a tool to estimate changes in fluid status in HD patients.
657 studies on the registry are indexed under Body Weight; 76 are open to participants now.
This study's planned enrollment of 42 is below the median of 71 across 500 interventional studies indexed under Body Weight.
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Hemodialysis for more than 3 month Hemodynamic stabile during a dialysis session
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Exclusion Criteria:
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Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Measurement wil be donne before and after a hemodialysis. Bioimpendance spectroscopy is measured with 3 different bioimpedance apperatur. Absolute blood volumen is measured 5-10 minutes after starting and before stopping the dialysis session. For center hemodialysis patients with ultrafiltration measurement til be performed on 3 consecutive days and for patient center hemodialysis patient meaurement wil be performed once with also apply for Home hemodialysis patients.
Device: Bioimpedance analysis
Comparing the perfomance of original data from 3 different bioimpedance apparatur and test there precision and accurary compared to ultrafiltration. And whether the performance of measuring absolut blood volume is better
Changes in BIS measured resistance and fluid removed
To investigate whether raw impedance data from BIS measurements can be used as a tool to estimate changes in fluid status in HD patients before and after a hemodialysis session of 4 hours duration. Weight loss during a hemodialysis session is equivalent to fluid removed. The meausement are don for up to oen week 1. To determine consistency in measurements of raw impedance data (Ω) between different BIS devices (here: Fresenius BCM ®, SFB7 ® and SOZO ® from Imped-iMed). 2. Change in raw impedance data (Ω) during a hemodialysis session of 4 hours 3. Degree of ultrafiltrating (ml) a hemodialysis session of 4 hours 4. Change in absolute blood volume (ml) during a hemodialysis session of 4 hours 4\) In a subset of patients test if the length of the of pause (days) between hemodialysis session influence the raw impedance measurements.
Time frame: From enrollment to the end of the dialysis session
Plan to share: Undecided
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Per Ivarsen