Abstract
Purpose: When intending balloon-/stent-assisted embolization of cerebral aneurysms using ≥8 Fr guiding and coaxial 6 Fr inner catheters, operations can be conducted more safely by inserting the inner catheter to a site proximal to the aneurysm. However, tortuous-blood-vessel-related mechanical vasospasm or blood stagnation makes it impossible to insert a 6 Fr inner catheter to a distal site in some patients. For adjunctive techniques, devices may interfere with each other in a 6 Fr inner catheter, reducing the operability.
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