Abstract
Objectives: Behavior of the coils and microcatheters during coil ejection from the microcatheter is influenced not only by the characteristic features themselves but also by the properties of delivery wires. Elasticity and bending features of delivery wires of soft coils in five brands (Axium Helix, Deltaplush, ED coil Extrasoft, Galaxy Complex Xtrasoft, Target Ultra) are examined.
Methods: Delivery wires are pinched by tweezers at 30 mm or 20 mm proximal from detaching point, and repelling force was measured when the wires were bended to the point of length of 15 mm or 10 mm each. Configurations of bended wires were also investigated.
Results: Average repelling force (×10−3N) of Axium, Deltaplush, ED, Galaxy, and Target were 3.822, 4.41, 2.548, 3.136, and 4.018 each in 30 mm group, and 7.105, 9.996, 4.312, 5.488, 6.174 each in 20-mm group, respectively. Wires showed continuous curve in three brands of Axium, ED, and Target, and non-continuous curve with buckle at 10-mm short of detaching point in the remaining Deltaplush and Galaxy coils.
Conclusions: To finish coil embolization treatment safely and effectively, coils should be chosen according to proper understanding of characteristic features of each delivery wires.
