Studies of fenestrated and/or branched endografts in high-risk patients with a diagnosis of TAAA were eligible for inclusion. Studies had to include more than three patients and provide data on patient demographics, follow-up length, technical success and 30-day mortality. Studies on juxtarenal aneurysm repair and studies that specialised in conventional open surgery or less invasive techniques were excluded.
The included studies were mostly conducted in patients with aneurysms classified as Crawford type IV and had aneurysm sizes of between 6.5cm and 7.6cm. Types of intervention were custom-designed branched and/or fenestrated endovascular devices based on the Zenith endograft. Mean patient age was 71 to 76 years. The proportion of male patients was approximately 65%. Many of the patients had comorbidities such as coronary artery disease, hypertension, diabetes, COPD, renal failure and previous surgery.
Three reviewers independently undertook study selection. Disagreements were resolved by discussion.