E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Prevention of early thrombosis in arterio-venous fistulae in patients with Stage IV or V chronic kidney disease requiring haemodialysis |
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MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 14.0 |
E.1.2 | Level | LLT |
E.1.2 | Classification code | 10060478 |
E.1.2 | Term | Thrombosis prophylaxis in haemodialysis |
E.1.2 | System Organ Class | 10042613 - Surgical and medical procedures |
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E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 14.0 |
E.1.2 | Level | LLT |
E.1.2 | Classification code | 10059336 |
E.1.2 | Term | Haemodialysis fistula thrombosis |
E.1.2 | System Organ Class | 10022117 - Injury, poisoning and procedural complications |
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E.1.3 | Condition being studied is a rare disease | No |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
The primary objective of this trial is to determine whether the use of omega-3 fatty acids reduce the arterio-venous fistulae (AVF) failure rate for new AVF, compared to placebo within the first 12 months post AVF surgery.
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E.2.2 | Secondary objectives of the trial |
Secondary efficacy objectives:
To study the effect of omega-3 fatty acids compared placebo on the following categories of objectives:
1. Thrombosis (clotting) a. the rate of AVF Thrombosis within 12 months post AVF surgery b. the rate of primary patency at various time points after surgery (within 24 hours, at weeks 1, 6 and 12 and months 6 and 12) c. the rate of rescue interventions within 12 months post AVF surgery d. time to the first rescue intervention
2. Permanent AVF abandonment a. the rate of permanent abandonment within 12 months post AVF surgery b. time to permanent abandonment of the study AVF
3. Cannulation a. the rate of Cannulation Failure during the Cannulation Assessment Period b. time to the first successful cannulation
4. Central Venous Catheter (CVC) requirement a. for haemodialysis on ≥1 occasion between 12 weeks and 12 months post AVF Surgery b. for haemodialysis on ≥1 occasion during Cannulation Assessment Period c. for haemodialysis |
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E.2.3 | Trial contains a sub-study | Yes |
E.2.3.1 | Full title, date and version of each sub-study and their related objectives |
All details are contained within the main protocol.
RBC fatty acid substudy Omega-3 fatty acids incorporated into the red blood cell membrane will be used as a compliance measure. In addition, there will be a cross sectional assessment looking at RBC omega-3s and patient characteristics. This substudy will be undertaken by only the Australian and New Zealand sites.
Dietary and physical questionnaire Many CKD patients have poor diets and malnutrition. This sub-study explores the status and the significance of dietary intake (including fish) and lifestyle factors in relation to patient outcomes. In particular, the questionnaire results will enable the interaction between these lifestyle and dietary factors and response to omega-3 fatty acids supplementation to be explored. This substudy will be undertaken by all participating sites.
Pre-surgical Doppler studies This sub-study explores whether pre-operative vascular characteristics determined by duplex ultrasound will predict vascular access outcomes either independently or in particular, the response to aspirin, omega-3 fatty acids and the combination. This substudy will be undertaken by interested sites in any of participating countries with the requisite vein mapping faculties.
Platelet and Coagulation Function This substudy aims to study the effects of aspirin and omega-3 fatty acids alone and the combination on platelet function, coagulation and platelet activation as well as quantification of compliance with aspirin (prostaglandin metabolites). This substudy will be undertaken by only the Australian and New Zealand sites.
Micro-particle Analysis This sub study aims to study the effects of aspirin and omega-3 fatty acids alone and in combination on the formation of pro coagulant micro particles. This substudy will be undertaken by interested UK sites only
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E.3 | Principal inclusion criteria |
Patients must meet the following inclusion criteria: 1. Stage 4 or 5 Chronic Kidney Disease 2. Currently on haemodialysis or haemodialysis is planned to start within 12 months (including patients currently on peritoneal dialysis). 3. Planned AVF will be the primary haemodialysis access mechanism. 4. Surgery to create an arterio-venous fistula in the upper or lower arm is planned. 5. Aged over 19 years 6. Treating team agreeable to patient’s involvement in the trial 7. Informed consent
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E.4 | Principal exclusion criteria |
Patients must not meet any of the following exclusion criteria: 1. Revision of existing AVF rather than de novo AVF 2. Medical indication for anti-platelet or thrombolytic agents* 3. Known intolerance of agents including hypersensitivity to aspirin, allergy to any other NSAIDs or fish or hypersensitivity to soya. 4. Current use of aspirin within two weeks of commencing trial, or of omega-3 fatty acids within 4 weeks of commencing trial* 5. Pregnancy, lactation or intention to fall pregnant during the time course of the study 6. Known bleeding disorder or established diagnosis of active or suspected bleeding 7. History of GI ulcers or bleeding within the last 3 months 8. Platelet count less than 100 x 109 /L 9. Known active peptic ulcer disease 10. Severe hepatic insufficiency 11. Already receiving anti-coagulation therapy such as warfarin 12. Receiving regular non-steroidal anti-inflammatory (NSAIDS) agents for another indication such as arthritis 13. Syndrome of asthma, rhinitis and nasal polyps if uncontrolled on usual therapy 14. Plan to have other (non-access) surgery within 2 weeks of trial medication period where, in the opinion of the investigator, aspirin or omega-3 fatty acids would be contraindicated for the planned procedure. 15. Potential non-compliance with treatment regimen in the view of the treating clinicians 16. Involved in another clinical trial where the intervention being trialled is likely to confound the outcome of this trial 17. Previously randomised to this trial. *Note: Patients who fail to meet the exclusion criteria 2 (Medical indication for anti-platelet or thrombolytic agents) and exclusion criteria 4 (Current use of aspirin within two weeks of commencing trial), and who are otherwise suitable will be enrolled into the expanded protocol.
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E.5 End points |
E.5.1 | Primary end point(s) |
AVF Access Failure is a composite of • Thrombosis: This is defined as the absence of a thrill or bruit clinically and/or the requirement of Rescue Intervention to restore patency for thrombosis or occlusion for the study AVF between AVF Surgery and Month 12 Visit. Please refer to section 4.6.5 for further information about Rescue Intervention events. • AVF Abandonment: This is defined as the permanent abandonment of study AVF between AVF Surgery and Month 12 Visit. Please refer to section 4.6.4 for further information about AVF abandonment. • Cannulation Failure: This is defined as the failure to successfully cannulate the study AVF with 2 needles (or with 1 needle if using single needle dialysis method) during 8 or more 12 HD sessions. Please refer to Section 4.6.3 for further information about Assessment Periods.
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
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E.5.2 | Secondary end point(s) |
4.5.2 Secondary Thrombosis • Thrombosis: This is defined as the absence of a thrill or bruit clinically and/or the requirement of Rescue Intervention to restore patency for thrombosis or occlusion for the study AVF between AVF Surgery and Month 12 Visit. Please refer to section 4.6.5 for further information about Rescue Intervention events. • Primary patency at various time points: This is defined as the presence of an audible bruit over the site of the arterio-venous anastomosis at time points of within 24 hours post surgery (Recovery visit), and Visits Weeks 1, 6 and 12 and Months 6 and 12. • Number and type of Interventions: This is defined as the number and type of interventions (both rescue and non-rescue) the study AVF requires between AVF Surgery and Month 12 Visit. Please refer to section 4.6.5 for further information about Rescue Intervention events. • Time to first Rescue Intervention: This is defined as the time from AVF creation to first occasion of rescue intervention up to Month 12 Visit. Please refer to section 4.6.5 for details of the Rescue Intervention events.
Permanent AVF abandonment • AVF Abandonment: This is defined as the permanent abandonment of study AVF between AVF Surgery and Month 12 Visit. Please refer to section 4.6.4 for further information about AVF abandonment. • Time to AVF Abandonment: This is defined as the time from AVF Surgery to permanent abandonment of study AVF up to Month 12 Visit. Please refer to section 4.6.4 for further information about AVF abandonment
Cannulation • Cannulation Failure: This is defined as the failure to successfully cannulate the study AVF with 2 needles (or with 1 needle if using single needle dialysis method) during 8 or more 12 HD sessions. Please refer Section 4.6.3 for the Cannulation Assessment Periods. • Time to the first Successful Cannulation: This is defined as the time taken from the AVF Surgery until the first successful attempt at access cannulation up until Month 12 Visit.
Central Venous Catheter (CVC) requirement • CVC Requirement between Visits Week 12 and Month 12: This is defined as the use of a CVC on any occasion to provide vascular access for HD between Week 12 and Month 12 Visits. • CVC Requirement during CAP: This is defined as the use of a CVC on any occasion to provide vascular access for HD during Cannulation Assessment Period. Please refer to section 4.6.3 for further information about assessment periods. • CVC Requirement after CAP: This is defined as the use of a CVC on any occasion to provide vascular access for HD after Cannulation Assessment Period to Month 12 Visit. Please refer to section 4.6.3 for further information about Assessment Periods. • Days of CVC: This is defined as the number of days a CVC is present in situ between Week 12 and Month 12 Visits.
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
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E.6 and E.7 Scope of the trial |
E.6 | Scope of the trial |
E.6.1 | Diagnosis | No |
E.6.2 | Prophylaxis | Yes |
E.6.3 | Therapy | No |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | Yes |
E.6.6 | Pharmacokinetic | No |
E.6.7 | Pharmacodynamic | No |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | No |
E.6.10 | Pharmacogenetic | No |
E.6.11 | Pharmacogenomic | No |
E.6.12 | Pharmacoeconomic | No |
E.6.13 | Others | No |
E.7 | Trial type and phase |
E.7.1 | Human pharmacology (Phase I) | No |
E.7.1.1 | First administration to humans | No |
E.7.1.2 | Bioequivalence study | No |
E.7.1.3 | Other | No |
E.7.1.3.1 | Other trial type description | |
E.7.2 | Therapeutic exploratory (Phase II) | No |
E.7.3 | Therapeutic confirmatory (Phase III) | Yes |
E.7.4 | Therapeutic use (Phase IV) | No |
E.8 Design of the trial |
E.8.1 | Controlled | Yes |
E.8.1.1 | Randomised | Yes |
E.8.1.2 | Open | No |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | Yes |
E.8.1.5 | Parallel group | Yes |
E.8.1.6 | Cross over | No |
E.8.1.7 | Other | No |
E.8.2 | Comparator of controlled trial |
E.8.2.1 | Other medicinal product(s) | Yes |
E.8.2.2 | Placebo | Yes |
E.8.2.3 | Other | No |
E.8.2.4 | Number of treatment arms in the trial | 4 |
E.8.3 |
The trial involves single site in the Member State concerned
| No |
E.8.4 | The trial involves multiple sites in the Member State concerned | Yes |
E.8.4.1 | Number of sites anticipated in Member State concerned | 8 |
E.8.5 | The trial involves multiple Member States | No |
E.8.6 Trial involving sites outside the EEA |
E.8.6.1 | Trial being conducted both within and outside the EEA | Yes |
E.8.6.2 | Trial being conducted completely outside of the EEA | No |
E.8.6.3 | If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned |
Australia |
Malaysia |
New Zealand |
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E.8.7 | Trial has a data monitoring committee | Yes |
E.8.8 |
Definition of the end of the trial and justification where it is not the last
visit of the last subject undergoing the trial
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Last visit of the last subject undergoing the trial. |
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E.8.9 Initial estimate of the duration of the trial |
E.8.9.1 | In the Member State concerned years | 3 |
E.8.9.1 | In the Member State concerned months | 12 |
E.8.9.1 | In the Member State concerned days | 30 |
E.8.9.2 | In all countries concerned by the trial years | 7 |
E.8.9.2 | In all countries concerned by the trial months | 11 |
E.8.9.2 | In all countries concerned by the trial days | 30 |