Udvidet hemodialyse versus højvolumen online hemodiafiltration for fjernelse af uræmiske toksiner (REMOV-HDx)
Virkningen af udvidet hemodialyseordination på global fjernelse af uræmiske toksiner sammenlignet med højvolumen online hemodiafiltrering: Et randomiseret åbent krydsforsøg
People with advanced kidney disease need dialysis to remove waste products from the blood. Some of these waste products, called uremic toxins, are small, while others are medium-sized and more difficult to remove. Poor removal of these toxins may contribute to symptoms and long-term complications in patients on dialysis.
Two dialysis techniques are commonly used to improve toxin removal beyond standard hemodialysis: expanded hemodialysis (HDx) using medium cut-off membranes, and high-volume online hemodiafiltration (HV-OL-HDF). Although both techniques are effective, the best way to prescribe expanded hemodialysis-particularly the ideal treatment time-has not been clearly defined.
The purpose of this study is to compare how well different treatment times of expanded hemodialysis remove small and medium-sized uremic toxins, and to compare these results with high-volume online hemodiafiltration. Toxin removal will be evaluated using a combined measurement called the Global Removal Score, which summarizes the removal of several important waste substances.
This is a single-center, randomized, open-label, crossover study. Adults receiving maintenance hemodialysis will receive three different expanded hemodialysis sessions with different treatment durations (180, 210, and 240 minutes), followed by one session of high-volume online hemodiafiltration. Blood samples will be taken before and after each dialysis session to measure toxin levels.
The results of this study may help determine whether expanded hemodialysis with shorter or standard treatment times can achieve toxin removal similar to high-volume hemodiafiltration, which could support more personalized and practical dialysis prescriptions.
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljeret beskrivelse
Expanded hemodialysis (HDx) using medium cut-off (MCO) membranes has been developed to improve the removal of medium-sized uremic toxins while maintaining effective clearance of small solutes. These medium-sized molecules have been associated with inflammation, cardiovascular disease, and other complications in patients with end-stage kidney disease. High-volume online hemodiafiltration (HV-OL-HDF) is currently considered a reference therapy for enhanced removal of these toxins, but its use may be limited by technical requirements, vascular access constraints, or resource availability.
While expanded hemodialysis has shown removal efficiency comparable to high-volume hemodiafiltration in prior studies, the optimal prescription of HDx-particularly the appropriate treatment duration-has not been clearly established. In routine clinical practice, dialysis dose is commonly guided by small-solute clearance (such as urea), which may not fully reflect the removal of medium-sized uremic toxins. A more comprehensive evaluation of toxin removal may help optimize dialysis prescriptions and improve treatment personalization.
This study is designed to compare the efficiency of uremic toxin removal across different expanded hemodialysis treatment durations and to contrast these results with high-volume online hemodiafiltration. Removal efficiency will be assessed using the Global Removal Score, a composite measure that integrates the removal rates of several small and medium-sized molecules while accounting for albumin loss.
The study is a single-center, randomized, open-label, crossover trial conducted in adult patients receiving maintenance hemodialysis. Each participant will receive three expanded hemodialysis sessions with different treatment durations (180, 210, and 240 minutes), administered in randomized sequences following the long interdialytic interval. After completion of the three expanded hemodialysis sessions, all participants will undergo one session of high-volume online hemodiafiltration with a predefined convective volume target.
During each study session, blood samples will be collected immediately before and after dialysis to measure concentrations of selected uremic toxins, including small solutes and medium-sized molecules. These measurements will be used to calculate individual and global removal rates for each dialysis modality and treatment duration. Standard dialysis parameters will be maintained according to institutional practice to ensure patient safety and consistency across sessions.
The crossover design allows each participant to serve as their own control, reducing variability related to patient-specific factors. The primary analysis will compare global toxin removal between expanded hemodialysis prescriptions and high-volume online hemodiafiltration, as well as across different HDx treatment durations.
The findings of this study may help clarify whether expanded hemodialysis with shorter or standard treatment times can achieve toxin removal comparable to high-volume hemodiafiltration. This information could support more individualized dialysis prescriptions and inform clinical decision-making in settings where high-volume hemodiafiltration is not feasible or routinely available.
Undersøgelsestype
Undersøgelsestype
Tilmelding (Faktiske)
Tilmelding
Fase
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiesteder
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-
Mexico City
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Mexico City, Mexico City, Mexico, 14080
- Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubiran
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Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion Criteria:
- Adults aged 18 years or older
- End stage renal disease Receiving maintenance hemodialysis three times per week on expanded hemodialysis as part of routine care for at least 1 month
- On dialysis treatment for more than 3 months
- Minimal or no residual urine output (less than 100 mL per day)
- Able and willing to provide written informed consent
Exclusion Criteria:
- Vascular access unable to support a blood flow of at least 300 mL/min
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Behandling
- Tildeling: N/A
- Interventionel model: Enkelt gruppeopgave
- Maskning: Ingen (Åben etiket)
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
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Eksperimentel: Expanded Hemodialysis Prescriptions and High-Volume Online Hemodiafiltration
Participants will receive three expanded hemodialysis sessions with different treatment durations (180, 210, and 240 minutes) in randomized order, followed by one session of high-volume online hemodiafiltration. Blood samples will be collected before and after each session to assess uremic toxin removal. |
Expanded hemodialysis will be performed using a medium cut-off dialysis membrane designed to enhance the removal of medium-sized uremic toxins while preserving albumin. Treatments will be delivered during regularly scheduled dialysis sessions with fixed dialysate flow and the maximum blood flow tolerated by the participant. Each participant will receive expanded hemodialysis sessions with three different treatment durations (180, 210, and 240 minutes), administered in randomized order following the long interdialytic interval. Blood samples will be collected before and after each session to assess removal of small and medium-sized uremic toxins.
Andre navne:
High-volume online hemodiafiltration will be delivered using post-dilution substitution during a standard dialysis session. Treatment will target a predefined convective volume consistent with high-volume hemodiafiltration while maintaining standard dialysis safety parameters. This intervention will be administered once to each participant after completion of the expanded hemodialysis sessions. Blood samples will be collected before and after the session to measure removal of small and medium-sized uremic toxins for comparison with expanded hemodialysis.
Andre navne:
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Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Global Removal Score of Uremic Toxins
Tidsramme: During each dialysis intervention session (pre- and post-dialysis measurements), over a 4-week study period
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The Global Removal Score is a composite measure of dialysis efficiency that summarizes the percentage reduction of selected small and medium-sized uremic toxins during a dialysis session. It is calculated using the reduction ratios of urea, beta-2 microglobulin, myoglobin, prolactin, alpha-1 microglobulin, and alpha-1 acid glycoprotein, adjusted for albumin loss. Higher values indicate greater overall uremic toxin removal. |
During each dialysis intervention session (pre- and post-dialysis measurements), over a 4-week study period
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Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Removal Rate of Individual Medium-Sized Uremic Toxins
Tidsramme: During each dialysis intervention session (pre- and post-dialysis measurements), over a 4-week study period
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Percentage reduction of individual medium-sized uremic toxins, including beta-2 microglobulin, myoglobin, prolactin, alpha-1 microglobulin, and alpha-1 acid glycoprotein, measured before and after each dialysis session. |
During each dialysis intervention session (pre- and post-dialysis measurements), over a 4-week study period
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Removal Rate of Small Solutes
Tidsramme: During each dialysis intervention session (pre- and post-dialysis measurements), over a 4-week study period
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Percentage reduction of small solutes, including urea and creatinine, measured before and after each dialysis session to assess small-molecule clearance across dialysis modalities and treatment durations. |
During each dialysis intervention session (pre- and post-dialysis measurements), over a 4-week study period
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Beta-2 Microglobulin Clearance by Kt/V
Tidsramme: During each dialysis intervention session, over a 4-week study period
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Dialysis dose for beta-2 microglobulin expressed as Kt/V, calculated for each dialysis session to compare the kinetics of beta-2 microglobulin removal across expanded hemodialysis prescriptions and high-volume online hemodiafiltration. |
During each dialysis intervention session, over a 4-week study period
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Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Efterforskere
Efterforskere
- Ledende efterforsker: Olynka Vega, MS, Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Studiestart
Primær færdiggørelse (Faktiske)
Primær færdiggørelse
Studieafslutning (Faktiske)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
- Urogenitale sygdomme
- Organisering af lungebetændelse
- Patologiske processer
- Mandlige urogenitale sygdomme
- Nyresygdomme
- Urologiske sygdomme
- Urogenitale sygdomme hos kvinder
- Kvinders urogenitale sygdomme og graviditetskomplikationer
- Kronisk sygdom
- Sygdomsegenskaber
- Sygdomme i immunsystemet
- Luftvejssygdomme
- Lungesygdomme
- Bronchiale sygdomme
- Lungesygdomme, obstruktiv
- Nyreinsufficiens
- Nyreinsufficiens, kronisk
- Bronchiolitis Obliterans
- Bronchiolitis
- Bronkitis
- Graft vs værtssygdom
- Patologiske tilstande, tegn og symptomer
- Bronchiolitis Obliterans syndrom
- Nyresvigt, kronisk
- Uræmi
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- NMM-4853
Plan for individuelle deltagerdata (IPD)
Planlægger du at dele individuelle deltagerdata (IPD)?
IPD-planbeskrivelse
Individual participant data will not be shared publicly. This study involves a small, single-center cohort with detailed clinical and laboratory data, and sharing individual-level data could increase the risk of participant re-identification. In addition, the data are collected for a specific mechanistic research purpose and are not intended for secondary analyses outside the scope of the approved protocol. Aggregate results will be reported through scientific publications and presentations.
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