Clinical study of interventional embolization for the treatment of tiny intracranial aneurysms

Objective: To explore the therapeutic efficacy of endovascular embolization for the treatment of tiny intracranial aneurysms (≤ 3.0 mm) and to discuss its technical skill. Methods: During the period from Dec. 2010 to July 2013, a total of 12 patients with tiny intracranial aneurysms (≤ 3.0 mm) were admitted to authors' hospital to receive endovascular embolization therapy. Of the 12 patients, narrow-necked aneurysm (neck-to-body ratio ≤ 0.5) was seen in 7 and embolization with coils only was carried out, while wide-necked aneurysm (neck-to-body ratio > 0.5) was seen in 5 and stent-assisted coils embolization was adopted. Based on Raymond grading standard, the immediate therapeutic results were evaluated, and the procedure-related complications were recorded. Thirty days after the treatment, GOS grade was used to assess the results. Follow-up evaluation with angiography or through call was conducted. Results: Successful embolization of the aneurysm was obtained in all the 12 aneurysms, with a success rate of 100%. Angiography performed immediately after the treatment showed that complete embolization was achieved in 8 aneurysms (66.7%) and residual aneurysm cavity was seen in 4 aneurysms (33.3%). GOS grading indicated that 12 cases belonged to grade V. The 12 patients were followed up for 1-12 months through telephone, and no re-bleeding occurred. Conclusion: For the treatment of tiny intracranial aneurysms (≤ 3.0 mm), endovascular embolization is feasible although its safety and efficacy need to be further observed. (authors)