The Analysis of Inflow Angle of Intracranial Aneurysm and The Risk of Rupture of Intracranial Aneurysms
Keywords:
angle of cerebral aneurysm, ruptured intracranial aneurysm, risk of aneurysm ruptureAbstract
Introduction: A ruptured cerebral aneurysm has severe symptoms and subsequently high mortality. It was found that patients could die before or after reaching the hospital not very long. Factors that cause the rupture are size, location, aspect ratio estimating, and types of cerebral aneurysms. The researcher decided to study this topic because there was not any research about how the angle of cerebral aneurysm is related to the incidence at risk of rupture.
Method: Retrospective cross-sectional analytic study of aneurysm patients was used in this study. The patients had to get a computerized angiography (CTA) or get a cerebral angiogram for checking on an aneurysm at Maharaj Hospital, Nakhon Ratchasima between Jan 2019 and Dec 2021. Personal information was gathered from the medical record. The cerebral aneurysm was measured by the angle by program computer and x-ray computer photo.
Result: There were 152 patients with an eligible qualification. They were classified into 2 groups: 124 ruptured aneurysm patients (81.6%) and 28 unruptured aneurysm patients (18.4%). The researcher found the angle of cerebral aneurysm in case of prediction of ruptured incidence. The area under the ROC graph was 0.99 (95%CI). The angle of > 95˚ of the aneurysm had a sensitivity. The opportunity of rupture was 95. 2% (95%CI: 89.8,98.2). The specification was 96.4% (95%CI, 81.7,99.9). If the angle was analyzed according to an acute angle (< 90 ํ) andd obtuse angle (> 90 ํ). It was found that the sensitivity was 100% (95%CI:97.1,100) and the specificity was 85.7% (95% CI:67.3,96.0). The angle of > 95˚ had a 28.6% prevalence risk of intraoperative rupture; 26.9% of postoperative complication and 14.3% of postoperative death.
Conclusion: The angle of cerebral aneurysm affected an incidence of rupture. Obtuse angle possibly had a higher risk than acute angle. The > 95˚ had more effective average of sensitivity and specificity to notify the incidence of rupture. It also maybe had a higher risk to intraoperative rupture than the ≤ 95˚ of angle.
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