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A Prospective Cohort Comparison Study of Open and Endovascular Techniques for Juxtarenal and Suprarenal Abdominal Aortic Aneurysms (The UK Complex AAA Study).

Basic Trial Information

Phase Type Status Age Sponsor Protocol IDs Recruitment
Open The Royal Liverpool and Broadgreen University Hospital EUDRACT No:


Trial Lead Organisations

Official Title

A Prospective Cohort Comparison Study of Open and Endovascular Techniques for Juxtarenal and Suprarenal Abdominal Aortic Aneurysms (The UK Complex AAA Study).

Trial Start Date



Trial Coordinator

Claire Taylor

Trial Coordinator Email Address

Trial Coordinator Contact No


Inclusion criteria:

  1. Patients undergoing elective Juxtarenal AAA repair in England [juxtarenal AAA defined and stratified into 4 strata of anatomical complexity].
  2. Patients with a Juxtarenal AAA 55 mm or larger in size and placed on Medical Management ‘Operation-deferred’.

Exclusion criteria:

  1. Surgeon-modified stent-grafts and devices.
  2. Emergency operations (elective operations are distinguished from non-elective ones on NVR),
  3. Thoracic or thoracoabdominal aneurysms (this is a different extent/location of aneurysm disease, requiring different health technology. These treatments are currently being investigated by ETTAA study-HTA 11/147/03. Patients will be included in ETTAA),
  4. Aneurysm neck anatomy suitable for standard infrarenal EVAR within IFU of any CE marked device.
  5. ‘Operation Declined Medical Management’ patients, due to co-morbidity or patient choice.


  • Taunton, Musgrove Park Hospital (Taunton) (Katy Darvall)


  • Bristol, Southmead Hospital (Bristol) (Paul Bevis)
  • Cambridge, Addenbrooke's Hospital (Jonathan Boyle)
  • Kingston Upon Hull, Hull Royal Infirmary (Ian Chetter)
  • Leeds, Leeds General Infirmary (Jai Patel)
  • Liverpool, Royal Liverpool University Hospital (Robert Fisher)
  • London, St. George's Hospital (London) (Ian Loftus)
  • Newcastle upon Tyne , Freeman Hospital (Newcastle upon Tyne) (James McCaslin)


  • Leicester, Glenfield Hospital (Leicester) (Tryfonas Vainas)
  • Oldham, Royal Oldham Hospital (George Antoniou)


  • Gloucester, Gloucestershire Royal Hospital (Gloucester) (Sharath Paravastu)

Frequently Asked Questions

What is the purpose of the study?

Abdominal aortic aneurysm (AAA) is a common condition where the aorta, the largest artery, begins to bulge abnormally.  AAAs vary in complexity. Some AAAs are more complex because they are close to the arterial branches to the kidneys. There are different methods of managing such complex aneurysms and doctors are unsure which is best. We intend to study all patients undergoing such aneurysm treatment in England without altering their treatment. We plan to examine the routinely performed scans and utilise data that is routinely collected by the NHS. Available data will be analysed to compare the safety and effectiveness of different treatments, and to see if a particular treatment is better suited for particular features so that patients can be offered bespoke treatment strategies.


What will happen to me if I take part?

All patients undergoing treatment for complex AAA repair will be included. If you are happy for your anonymised data to be included in the study there is actually nothing further required for you to do. You will have your treatment planned as normal and the routinely collected NHS data will be made available to the study team at a later date. No personal or sensitive data will be used in analyses.

Some patients may be asked to take part in the study by completing questionnaires about their Quality of Life. If you agree to take part in this aspect of the study you will be asked to sign a consent form before you receive any questionnaires. The questionnaires take approximately 15 minutes to complete and you will be given a prepaid envelope so you can return it to the trial team. You will receive follow- up questionnaires for up to 5 years.


Do I have to take part?

No. It is up to you to decide whether or not you want to be included in this study.

If you do not want your data to be included with the routinely collected NHS data you can "opt out" by contacting the trial team on Tel: 0151 706 3438 or emailing

If you agree to take part with the Quality of Life questionnaires you are free to withdraw your consent at any time and without giving a reason.

A decision to opt out or to withdraw consent will not affect the standard of care you receive.








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