- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT06327750
The Microcirculation, Dialysis Modality and Sequestered Salt (MIMOSA)
The aim of this clinical trial is to investigate the effect of 5 different dialysis treatments (combinations of dialysis mode and dialysis fluid sodium content) on the microcirculation (MC) and sequestered sodium content (SSC) in adult prevalent end-stage kidney disease (ESKD) patients treated with hemodialysis (HD) or hemodiafiltration (HDF). The main questions it aims to answer are:
What are the effects on the sequestered sodium content and microcirculation after 4 weeks of treatment with the following dialysis modes?
- HDF with an expected zero diffusive sodium balance (Dialysate sodium concentration (DNa)= Plasma sodium concentration (PNa)) compared to
- HDF with an expected diffusive sodium efflux (DNa < PNa, difference 3 mmol/L) compared to
- HD with an expected zero diffusive sodium balance (DNa = PNa) compared to
- HD with an expected diffusive sodium efflux (DNa < PNa, difference 3 mmol/L) compared to
- Isolated ultrafiltration for 30 minutes followed by HD with an expected zero diffusive sodium balance (DNa = PNa)
- Are the SSC and MC interrelated in this patient group?
This study is a randomized cross-over trial. Participants will be subjected to the abovementioned dialysis treatment modes in random order.
Study Overview
Status
Conditions
Detailed Description
The life expectancy of patients with end-stage kidney disease (ESKD) is poor. Post-dilution online hemodiafiltration (HDF) is associated with a lower mortality than standard hemodialysis (HD), especially when a high convection volume is achieved (high-volume HDF; hvHDF). It is unclear, however, why (hv)HDF improves survival. Neither an increased clearance of middle molecular weight uremic toxins, nor an improved bio-incompatibility can explain the difference. As the effects are already observed within 2.5 years, recovery of a functional disorder is more likely than restoration of structural alterations. The recuperation of vascular dysfunction may be the missing piece of the puzzle. Previous literature showed (1) that the microcirculation (MC) is severely disturbed in dialysis patients, (2) excess sodium can bind to glycosaminoglycans in the interstitium and in the glycocalyx of blood vessels without commensurate water retention (sequestered sodium content [SSC]) and (3) that in patients with non-dialysis dependent chronic kidney disease, a disturbed SSC is related to capillary rarefaction and dysfunction. Therefore, the present study aims to assess the influences of both the modality (HD and HDF) and the dialysate sodium concentration (DNa) on the SSC and the MC.
Therefore the following hypotheses will be evaluated: (1, 2) treatment with hvHDF improves the SSC and MC, if compared to HD; (3, 4) disorders of the SSC and the MC are influenced by differences between the dialysate sodium [DNa] and plasma sodium [PNa] concentrations; (5) SSC and MC are interrelated in this patient group.
Study Type
Enrollment (Estimated)
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: Muriel PC Grooteman, MD PhD
- Phone Number: +3120 566 5990
- Email: mpc.grooteman@amsterdamumc.nl
Study Contact Backup
- Name: Sabrine Chaara, MD
- Phone Number: +316463173499
- Email: s.chaara@amsterdamumc.nl
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
- Adult
- Older Adult
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- Age ≥18 years
- Treatment with HD or HDF 3 x per week during at least 4 hours for at least 3 months
- Blood flow rate feasiblity of ≥350 ml/min
- Residual diuresis <200 ml/day
- Plasma Na before dialysis 137-145 mmol/L at baseline
- spKt/Vurea ≥ 1.2
- Ability to understand study procedures and willingness to provide informed consent
Exclusion Criteria:
- Severe incompliance to dialysis procedure and accompanying prescriptions, especially frequency and duration of dialysis treatment
- Life expectancy < 3 months due to non-renal disease
- Expected transplantation within 6 months
- Access recirculation > 10%
- Participation in another clinical intervention trial
- Metal implants (e.g. implantable cardioverter defibrillators)
- Severe obesity (MRI Ø 60 cm ≈ abdominal circumference ≤ 188 cm)
- Claustrophobia
Study Plan
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 |
Intervention / Treatment |
---|---|
Active Comparator: Hemodialysis (DNa=PNa)
High-flux hemodialysis with expected diffusive zero sodium balance (DNa=PNa)
|
High-flux hemodialysis with expected diffusive sodium efflux (DNa
High-flux hemodialysis after isolated ultrafiltration with an expected zero diffusive sodium balance (DNa=PNa)
High volume hemodiafiltration with an expected zero diffusive sodium balance (DNa=PNa) Convection volume: ≥23L/session
High volume hemodiafiltration with expected diffusive sodium efflux (DNa |
Active Comparator: Hemodialysis (DNa<PNa)
High-flux hemodialysis with expected diffusive sodium efflux (DNa<PNa, difference: 3 mmol/L)
|
High-flux hemodialysis after isolated ultrafiltration with an expected zero diffusive sodium balance (DNa=PNa)
High volume hemodiafiltration with an expected zero diffusive sodium balance (DNa=PNa) Convection volume: ≥23L/session
High volume hemodiafiltration with expected diffusive sodium efflux (DNa
High-flux hemodialysis with an expected zero diffusive sodium balance (DNa = PNa)
|
Active Comparator: Hemodialysis after isolated ultrafiltration (DNa=PNa)
High-flux hemodialysis after isolated ultrafiltration with expected zero sodium balance (DNa=PNa)
|
High-flux hemodialysis with expected diffusive sodium efflux (DNa
High volume hemodiafiltration with an expected zero diffusive sodium balance (DNa=PNa) Convection volume: ≥23L/session
High volume hemodiafiltration with expected diffusive sodium efflux (DNa
High-flux hemodialysis with an expected zero diffusive sodium balance (DNa = PNa)
|
Active Comparator: High volume hemodiafiltration (DNa=PNa)
High volume hemodiafiltration with expected diffusive zero sodium balance (DNa=PNa)
|
High-flux hemodialysis with expected diffusive sodium efflux (DNa
High-flux hemodialysis after isolated ultrafiltration with an expected zero diffusive sodium balance (DNa=PNa)
High volume hemodiafiltration with expected diffusive sodium efflux (DNa
High-flux hemodialysis with an expected zero diffusive sodium balance (DNa = PNa)
|
Active Comparator: High volume hemodiafiltration (DNa<PNa)
High volume hemodiafiltration with expected diffusive sodium efflux (DNa<PNa, difference: 3 mmol/L)
|
High-flux hemodialysis with expected diffusive sodium efflux (DNa
High-flux hemodialysis after isolated ultrafiltration with an expected zero diffusive sodium balance (DNa=PNa)
High volume hemodiafiltration with an expected zero diffusive sodium balance (DNa=PNa) Convection volume: ≥23L/session
High-flux hemodialysis with an expected zero diffusive sodium balance (DNa = PNa)
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Skin microcirculation
Time Frame: up to 20 weeks; assessed every 4 weeks before the last dialysis session of each treatment period (i.e. 5 times in total)
|
Skin microcirculatory perfusion/vasoreactivity (arbitrary units) measured with a laser speckle contrast analysis (LASCA) perfusion imager
|
up to 20 weeks; assessed every 4 weeks before the last dialysis session of each treatment period (i.e. 5 times in total)
|
Sequestered salt content (SSC)
Time Frame: up to 20 weeks; assessed every 4 weeks before the last dialysis session of each treatment period (i.e. 5 times in total)
|
SSC measured with a 7 Tesla 23-Sodium MRI
|
up to 20 weeks; assessed every 4 weeks before the last dialysis session of each treatment period (i.e. 5 times in total)
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Intradialytic hypotension
Time Frame: up to 4 hours (=one dialysis treatment); assessed during all dialysis sessions (12 treatments per intervention, measured 4x/hour)
|
A systolic blood pressure (SBP) ≤ 90 mmHg in patients with a pre-dialysis SBP < 160 mmHg and a SBP < 100 mmHg in patients with a pre-dialysis SBP ≥ 160 mmHg.
|
up to 4 hours (=one dialysis treatment); assessed during all dialysis sessions (12 treatments per intervention, measured 4x/hour)
|
Change in intradialytic blood pressure
Time Frame: up to 4 hours (=one dialysis treatment); assessed during all dialysis sessions (12 treatments per intervention, measured 4x/hour)
|
Change in systolic and diastolic blood pressure (mmHg) during one dialysis session
|
up to 4 hours (=one dialysis treatment); assessed during all dialysis sessions (12 treatments per intervention, measured 4x/hour)
|
Peridialytic blood pressure
Time Frame: up to 24 hours (=one interdialytic day): measured 3x/day every 4 weeks during the last interdialytic day of each treatment period (i.e. 5 times in total)
|
Change in systolic and diastolic blood pressure (mmHg) between dialysis sessions
|
up to 24 hours (=one interdialytic day): measured 3x/day every 4 weeks during the last interdialytic day of each treatment period (i.e. 5 times in total)
|
Change in CK-MB
Time Frame: up to 4 hours (=one dialysis treatment); measured before and immediately after the last dialysis session of each treatment period (i.e. 10 times in total)
|
Marker of cardiac damage, assessment in blood from arterial line of extracorporeal circuit
|
up to 4 hours (=one dialysis treatment); measured before and immediately after the last dialysis session of each treatment period (i.e. 10 times in total)
|
Change in high sensitivity C-reactive protein (hs-CRP)
Time Frame: up to 4 hours (=one dialysis treatment); measured before and immediately after the last dialysis session of each treatment period (i.e. 10 times in total)
|
Marker of inflammation, assessment in blood from arterial line of extracorporeal circuit
|
up to 4 hours (=one dialysis treatment); measured before and immediately after the last dialysis session of each treatment period (i.e. 10 times in total)
|
Change in interleukin-6 receptor (IL-6R)
Time Frame: up to 4 hours (=one dialysis treatment); measured before and immediately after the last dialysis session of each treatment period (i.e. 10 times in total)
|
Marker of inflammation, assessment in blood from arterial line of extracorporeal circuit
|
up to 4 hours (=one dialysis treatment); measured before and immediately after the last dialysis session of each treatment period (i.e. 10 times in total)
|
Change in soluble CD163 (sCD163)
Time Frame: up to 4 hours (=one dialysis treatment); measured before and immediately after the last dialysis session of each treatment period (i.e. 10 times in total)
|
Marker of inflammation, assessment in blood from arterial line of extracorporeal circuit
|
up to 4 hours (=one dialysis treatment); measured before and immediately after the last dialysis session of each treatment period (i.e. 10 times in total)
|
Change in soluble intercellular adhesion molecule-1 (s-ICAM-1)
Time Frame: up to 4 hours (=one dialysis treatment); measured before and immediately after the last dialysis session of each treatment period (i.e. 10 times in total)
|
Marker of inflammation, assessment in blood from arterial line of extracorporeal circuit
|
up to 4 hours (=one dialysis treatment); measured before and immediately after the last dialysis session of each treatment period (i.e. 10 times in total)
|
Change in serum glycosaminoglycans
Time Frame: up to 4 hours (=one dialysis treatment); measured before and immediately after the last dialysis session of each treatment period (i.e. 10 times in total)
|
Marker related to sequestered sodium content, assessment in blood from arterial line of extracorporeal circuit
|
up to 4 hours (=one dialysis treatment); measured before and immediately after the last dialysis session of each treatment period (i.e. 10 times in total)
|
Change in syndecan-1
Time Frame: up to 4 hours (=one dialysis treatment); measured before and immediately after the last dialysis session of each treatment period (i.e. 10 times in total)
|
Marker related to sequestered sodium content, assessment in blood from arterial line of extracorporeal circuit
|
up to 4 hours (=one dialysis treatment); measured before and immediately after the last dialysis session of each treatment period (i.e. 10 times in total)
|
Change in vascular endothelial growth factor C (VEGF-C)
Time Frame: up to 4 hours (=one dialysis treatment); measured before and immediately after the last dialysis session of each treatment period (i.e. 10 times in total)
|
Marker related to sequestered sodium content, assessment in blood from arterial line of extracorporeal circuit
|
up to 4 hours (=one dialysis treatment); measured before and immediately after the last dialysis session of each treatment period (i.e. 10 times in total)
|
Change in extracellular vesicles (EVs)
Time Frame: up to 4 hours (=one dialysis treatment); measured before and immediately after the last dialysis session of each treatment period (i.e. 10 times in total)
|
Marker for tissue-injury and inflammation, assessment in blood from arterial line of extracorporeal circuit
|
up to 4 hours (=one dialysis treatment); measured before and immediately after the last dialysis session of each treatment period (i.e. 10 times in total)
|
Change in skin microcirculation
Time Frame: up to 4 hours (=one dialysis treatment); measured before and immediately after the last dialysis session of each treatment period (i.e. 10 times in total)
|
Change in skin microcirculatory perfusion/vasoreactivity (arbitrary units) measured with a laser speckle contrast analysis (LASCA) perfusion imager during one dialysis session.
This will be assessed in 5 patients only.
|
up to 4 hours (=one dialysis treatment); measured before and immediately after the last dialysis session of each treatment period (i.e. 10 times in total)
|
Change in sequestered salt content (SSC)
Time Frame: up to 4 hours (=one dialysis treatment); measured before and immediately after the last dialysis session of each treatment period (i.e. 10 times in total)
|
Change in SSC measured with a 7 Tesla 23-Sodium MRI during one dialysis session.
This will be assessed in 5 patients only.
|
up to 4 hours (=one dialysis treatment); measured before and immediately after the last dialysis session of each treatment period (i.e. 10 times in total)
|
modified Dialysis symptom index (mDSI)
Time Frame: up to 20 weeks; evaluated every 4 weeks, during/after the last dialysis session of each treatment period
|
Standardized questionnaire for the evaluation of physical symptoms and recovery time in dialysis patients, consisting of 13 items.
Participants rate the severity of each item on a 5-point likert scale, ranging from 0 ('not at all') to 4 ('very much').
Higher scores indicate a greater perceived severity of symptoms.
|
up to 20 weeks; evaluated every 4 weeks, during/after the last dialysis session of each treatment period
|
Thirst distress scale (TDS)
Time Frame: up to 20 weeks; evaluated every 4 weeks, during/after the last dialysis session of each treatment period
|
The thirst distress scale is a 6-item questionnaire that measures thirst distress on a scale from 1 to 5, where 1 corresponds to 'Strongly disagree' and 5 to 'Strongly agree'.
Higher scores indicate greater perceived thirst distress.
|
up to 20 weeks; evaluated every 4 weeks, during/after the last dialysis session of each treatment period
|
EQ Visual analogue scale (EQ VAS)
Time Frame: up to 20 weeks; evaluated every 4 weeks, during/after the last dialysis session of each treatment period
|
The EQ VAS records the patients's self-rated health-related quality of life on a vertical visual analogue scale where 0 means 'the worst health you can imagine' and 100 means 'the best health you can imagine'.
Higher scores indicate a better perceived health-related quality of life.
|
up to 20 weeks; evaluated every 4 weeks, during/after the last dialysis session of each treatment period
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Muriel PC Grooteman, MD PhD, Amsterdam UMC
Study record dates
Study Major Dates
Study Start (Estimated)
Primary Completion (Estimated)
Study Completion (Estimated)
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
Additional Relevant MeSH Terms
Other Study ID Numbers
- NL83566.018.24
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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