1004. A 6-Fr guiding catheter (Slim Guide®) for use with multiple micro devices -Experimental study-

Authors: Yutaka Kai, PhD; Yutaka Kai (Aso, Japan)

Background: A modified technique is required in patients with wide-necked aneurysms whose treatment by the single microcatheter technique is difficult. We developed a new 6-Fr guiding catheter (Slim Guide®) that features a large lumen (0.072 inch) for performing the modified technique. To evaluate the usefulness of Slim Guide® we carried out experiments using 3 types of 6-Fr guiding catheter. Methods: In experiment 1, the shaft hardness and kink resistance were compared among 3 different guiding catheters (Slim Guide®, Launcher®, Envoy®). In experiment 2, we inserted a microballoon catheter and a microcatheter into the 3 different guiding catheters and recorded the maximal infusion pressure. In experiment 3, we inserted 13 different types of microdevices into the 3 different guiding catheters and evaluated the resistance of the microdevices. Results: Although the shaft of the Slim Guide® was softer than of the other 2 guiding catheters, its kink resistance was comparable. The maximal infusion pressure was significantly lower than with Launcher® or Envoy® catheters. Furthermore, with Slim Guide®, in 136 of 143 microdevice combinations examined (95.1%) there was no resistance; this was true for 125 (87.4%) and 116 (81.1%) combinations using the Launcher®- and the Envoy® guiding catheter, respectively. There was a significant difference between Slim Guide® and the other 2 guiding catheters with respect to their accommodation of double microsystems (p<0.05). Conclusions: Although the inner diameter of Slim Guide® is slightly larger than of the other 2 guiding catheters, it significantly increased the combination of microdevices that could be used for the coil embolization of difficult aneurysms.