Kuwajima Takuto, Beppu Mikiya, Yoshimura Shinichi
Department of Neurosurgery, Hyogo Medical University, Nishinomiya, Hyogo, Japan.
Department of Neurosurgery, Saiseikai Noe Hospital, Osaka Joto-ku, Osaka, Japan.
Interv Neuroradiol. 2025 May 21:15910199251342318. doi: 10.1177/15910199251342318.
ObjectiveVolume embolization ratio (VER) is an important factor involved in recurrence rates in endovascular coiling for cerebral aneurysms. However, there is no method to clearly understand it during surgery. We report our simplified aneurysm VER calculation method and discuss the outcomes.MethodsWe performed treatment by calculating the aneurysm volume and coil length using the formula D(length of coil inserted to achieve 100% packing in cm) = 2 V(aneurysm volume in mm). The volume and VER calculated by our simplified method were denoted as simplified volume (sV) and simplified VER (sVER). The volume and VER were also calculated by the application Angiosuite Neuro Edition, which were denoted as aV and aVER. The volume of the coil calculated by Angiosuite Neuro Edition divided by sV was called simplified Angiosuite VER (saVER). Comparisons were made between the averages of sVER and aVER, and sVER and saVER. Postoperative follow-up was performed by magnetic resonance angiography (MRA) or DSA 3 or 6, and 12 months, and Raymond Roy occlusion classification (RROC) was evaluated.ResultsT-test results were not significantly different between sVER and aVER ( = 0.06) or sVER and saVER ( = 0.9), the difference in VER due to the calculation method was within the margin of error. Eight of the 18 patients had improved RROC at 12 months, and there were no cases of worsening of the score.ConclusionWe presented simplified VER calculation method which can be performed in real time and clinically acceptable approximation without the need for a smartphone app.
目的
体积栓塞率（VER）是影响脑动脉瘤血管内栓塞复发率的一个重要因素。然而，在手术过程中尚无明确了解该指标的方法。我们报告一种简化的动脉瘤VER计算方法并探讨其结果。
方法
我们通过公式D（为实现100%填充插入的弹簧圈长度，单位为cm）= 2V（动脉瘤体积，单位为mm³）来计算动脉瘤体积和弹簧圈长度，进而进行治疗。用我们简化方法计算的体积和VER分别记为简化体积（sV）和简化体积栓塞率（sVER）。还通过Angiosuite Neuro Edition软件计算体积和VER，分别记为aV和aVER。将Angiosuite Neuro Edition软件计算的弹簧圈体积除以sV得到简化的Angiosuite VER（saVER）。对sVER与aVER的平均值以及sVER与saVER的平均值进行比较。术后3、6和12个月通过磁共振血管造影（MRA）或数字减影血管造影（DSA）进行随访，并评估雷蒙德 - 罗伊闭塞分级（RROC）。
结果
t检验结果显示sVER与aVER（P = 0.06）或sVER与saVER（P = 0.9）之间无显著差异，计算方法导致的VER差异在误差范围内。18例患者中有8例在12个月时RROC有所改善，且无评分恶化的病例。
结论
我们提出了一种简化的VER计算方法，无需智能手机应用程序即可实时进行且临床可接受近似计算。
