Abstract
ObjectiveTo evaluate the application of a hollow 3D-printed aneurysm model based on CTA data in microcatheter shaping MethodsUsing CTA data for 28 patients with 31 aneurysms, transparent hollow 3D models of the aneurysms were printed using a 3D printer. Microcatheters were shaped and validated in vitro using the models. The preshaped microcatheters were used for interventional coiling, and the accuracy and stability of the microcatheters during the procedure were evaluated. ResultsThirty preshaped microcatheters were successfully advanced toward the aneurysm sac and showed good alignment with the patient’s anatomy. Twenty-two of the microcatheters automatically jumped into the sac, eight required microwire guidance, and one failed. Among the successful cases, 26 remained stable during coiling and four prolapsed from the sac. ConclusionThe hollow 3D-printed model provided more profound anatomic information for precise shaping of microcatheters, increasing their stability during coiling.
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