Number of Coils for Parent Artery Occlusion of Ruptured Vertebral Artery Dissecting Aneurysm Delta Coil Case Series and Literature Review

Abstract

Background: Parent Artery Occlusion (PAO) by simple coiling for Vertebral Artery Dissection (VAD) sometimes needs a large number of coils, increasing both operative time and medical costs. DELTA coils (Johnson and Johnson, USA) provide a homogenous coil distribution and high packing density due to their triangular shape. They have the potential to decrease the number of coils used in PAO. In this study, we retrospectively investigated the number of coils required for PAO using the simple coiling to treat VAD-induced Subarachnoid Hemorrhage (SAH). Methods:We analyzed 11 of our own SAH patients who underwent PAO for VAD by simple coiling. A literature search was performed using PubMed and Japan Medical Abstracts Society for VAD, endovascular treatment, and coil. Results:The mean number of coils used in our hospital was 6.8 (3-10); the mean operative time was 77.8 (49-140) minutes. In the literature review, 20 of the 112 acquired reports stated the number of coils used for PAO by simple coiling for VAD-induced SAH. Of the 33 cases in the 20 reports, the mean number of coils used was 10.4 (3-60). Conclusion:DELTA coils and their characteristic triangular shape have the possibility to save medical costs by reducing the number of coils used for PAO.