Comparative Examination of Finishing Coils Available in Japan

Objective: In the final stage of coil embolization, microcatheter kickback often occurs and it may be difficult to fill the remaining space with a coil. To avoid microcatheter kickback and achieve successful embolization, soft type coils such as ED coil-10 Extra Soft type R (EDC-10ES) are frequently used as a finishing coil. We compared six different brands of finishing coils to evaluate the efficacy of EDC-10ES. Case Presentations: This paper presents a representative case of small cerebral aneurysm treated with only EDC-10 ES coils were presented. Furthermore, to compare the degree of coil softness and microcatheter kickback, we verified the in vitro coil performance of six different brands of finishing coils. The first experiment compared the degree of microcatheter kickback in the final stage of coil embolization and the second experiment tested the softness of the delivery wire. Conclusion: The results verified that EDC-10 ES has less microcatheter kickback in relation to both the coil and delivery wire, compared to the other finishing coils. Consequently, EDC-10 ES was evaluated as a coil with extremely high softness, allowing stable coil placement in the final stage of embolization.