Study to Assess Clearances and Bio-compatibility of ELISIO Dialyzer
Today, haemodialysis is a recognized standard treatment for patients with chronic kidney disease stage 5. During the haemodialysis treatment session, blood passes from the patient through the extracorporeal circuit and is then returned. The dialyzer represents the greatest surface are of the extracorporeal circuit, as dialysis treatment is essentially based on the removal of small molecular weight solutes down along a concentration gradient, and this depends upon surface area. The ELISIO-H dialyzer differs in design to our current standard dialyzer, the FX100, by having fibers of a greater internal diameter, which potentially allows more internal haemofiltration, leading to an improved clearance of larger molecular weight solutes. It is now thought that these so called "middle molecular weight" solutes are more important in contributing to the clinical condition termed azotaemia, rather than smaller solutes such as urea.
The investigators therefore wish to study the clearance of middle sized molecules between the different dialyzers.
|Study Design:||Allocation: Non-Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
|Official Title:||Study to Assess Clearances and Bio-compatibility of ELISIO Dialyzer|
- solute clearances [ Time Frame: 9 months ] [ Designated as safety issue: No ]
- erythropoietin requirements [ Time Frame: 9 months ] [ Designated as safety issue: No ]
- effect on inflammatory markers [ Time Frame: 9 months ] [ Designated as safety issue: No ]
- clotting potential [ Time Frame: 9 months ] [ Designated as safety issue: Yes ]
|Study Start Date:||February 2009|
|Study Completion Date:||November 2009|
|Primary Completion Date:||November 2009 (Final data collection date for primary outcome measure)|
Device: ELISIO dialyzer
Stable chronic kidney dialysis patients, currently dialyzing on the main Royal Free hospital dialysis unit will be asked to participate in the study. It is aimed to recruit 15 patients currently dialysing using the Fresenius FX100 dialyzer, who have used Fresenius polysulphone membranes for > 3 months.
During a mid week dialysis session, dialysis adequacy will be assessed by on line clearance, and samples of both blood and dialysate taken to assess, both clearances and bio-compatibility.
Thereafter patients would be switched to dialyse using the ELISIOTM-H dialyzer, but continue with the same dialysis prescription, and after 3 months, measurements repeated
Assessments Primary Clearances : on-line Kt/V, dual pool Kt/V, phosphate, b2microglobulin, cystatin C Secondary Serum :isoprostane generation complement activation platelet activation - coagulation activation - thrombophilic markers - Other Anticoagulation requirements & clotted circuits erythropoietin requirements, phosphate control therapy CRP
|Royal Free Hospital|
|London, United Kingdom, NW3 2QG|
|Principal Investigator:||andrew davenport, md||center for nephrology, University college Hospital medical School|