Population characteristics | With Sim&Size (n=94) | Without Sim&Size (n=95) | P value |
Median age (IQR) | 59.0 (48–66) | 56.5 (48–65) | 0.27 |
Female sex (n (%)) | 79 (84) | 77 (81) | 0.7 |
Diabetes (n (%)) | 3 (3) | 5 (5) | 0.72 |
Hypertension (n (%)) | 32 (34) | 36 (38) | 0.65 |
Hyperlipidemia (n (%)) | 20 (21) | 21 (22) | 1 |
Current or past smoking (n (%)) | 47 (50) | 39 (41) | 0.24 |
Intervention characteristics | |||
Ruptured aneurysm treated acutely (n (%)) | 6 (6) | 3 (3) | 0.33 |
Median aneurysm maximal diameter (mm) (IQR) | 6 (4–9) | 6 (4–10) | 0.14 |
Large vessel aneurysm (n (%)) | 79 (84) | 80 (84) | 1 |
Adjunctive coiling (n (%)) | 17 (18) | 18 (19) | 1 |
Experienced operator (n (%)) | 61 (65) | 67 (71) | 0.44 |
Complications (n (%))* | 3 (3) | 5 (5) | 0.72 |
Outcomes | |||
Need for corrective intervention (n (%)) | 8 (9)† | 19 (20)‡ | 0.036 |
Median duration of the intervention (min) (IQR) | 46 (40–59) | 52 (42–65) | 0.002 |
Median radiation dose (Air Kerma) (mGy) (IQR) | 1150 (929–1588) | 1558 (1059–1961) | <0.001 |
Median stent length (mm) (IQR) | 14 (14–16) | 16 (14–18) | <0.001 |
Median stent diameter (mm) (IQR) | 3.75 (3.25–4.25) | 4.00 (3.5–4.25) | 0.11 |
*Complications related to the femoral access were not included.
†Three cases of “need to discard the stent and deploy a new one” and five cases of “need to balloon the stent due to poor wall apposition”.
‡Ten cases of “need to discard the stent and deploy a new one”, five cases of “need to balloon the stent due to poor wall apposition” and five cases of “need to deploy a second stent due to either insufficient coverage of the aneurysm neck or poor proximal apposition”. In one case, in the cohort without the software, it was necessary both to discard the stent and to deploy a new one, and also to deploy yet another stent for poor proximal apposition (the case was counted as only one “need for corrective intervention” case).
IQR, interquartile range; mGy, milliGray.