In plain language
Across 3712 UK endovascular aortic repairs, patient dose indicators varied widely between centres and rose with complexity; proposed reference levels for kerma-area product (KAP) were 162 (EVAR), 175 (TEVAR) and 266 Gy cm2 (BEVAR/fenestrated endovascular aneurysm repair (FEVAR)). Staff dose was not measured.
At a glance
- Type of study
- Original research, Retrospective cohort study
- Who was studied
- Patients
- Size
- n = 3,712 procedures
- Where
- United Kingdom
- Summary based on
- the full text
What it found
Proposed UK national diagnostic reference levels (DRLs) for procedure KAP on fixed units rose with procedural complexity: standard EVAR, TEVAR, then branched endovascular aneurysm repair (BEVAR)/FEVAR.
Key figures: 162 Gy cm2, 175 Gy cm2 and 266 Gy cm2
A proportion of procedures exceeded the 500 Gy cm2 KAP follow-up trigger, most often complex BEVAR/FEVAR; none exceeded 5 Gy cumulative air kerma (CAK).
Key figures: 2.8%, 14.0% and 5.7% exceeded 500 Gy cm2
CAK DRLs were 865 mGy for standard EVAR and 1390 mGy for BEVAR/FEVAR; fluoroscopy KAP 49 and 190 Gy cm2.
Key figures: 865 mGy; 1390 mGy; 49 Gy cm2; 190 Gy cm2
75th percentile fluoroscopy times were 24.8 min (EVAR), 61.7 min (BEVAR/FEVAR) and 12.1 min (TEVAR).
Key figures: 24.8, 61.7 and 12.1 min
Standard EVAR on mobile units had roughly threefold lower KAP than on fixed units, and there were large inter-centre dose variations.
Key figures: approximately 3 times reduction
Limits to keep in mind
Retrospective multicentre data with incomplete variables (no patient weight, many centres missing CAK and fluoroscopy metrics); only patient dose indicators were measured, with no staff dosimetry.
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How this summary was made
ORSIF prepared this summary with AI assistance from the full text of the paper. A program then checked that the passage supporting each finding appears word for word in that source. A person has not yet reviewed each summary, so read the original before relying on a number. ORSIF summarizes research and does not endorse any product or company. Report a problem with this summary.
Prepared November 3, 2026.