Objective To discuss the application characteristics, techniques, and indications of the newly designed Envoy DA distal access guiding catheter in neuro-interventional therapy.

Methods We retrospectively analyzed the clinical data of 50 patients who underwent endovascular treatment with Envoy DA distal access catheter within 2 years in our center. We analyzed whether the Envoy DA guiding catheter is successfully delivered to the target position, and provide sufficient support with satisfaction. The immediate effect of the operation and whether there were catheter-related complications during the procedure were evaluated. Then we summarized the indications of using Envoy DA during neuro-interventional therapy.

Results A total of 50 patients used 50 Envoy DA distal access guide catheters, and 46 (92.0%) successfully reach the desired position. Two catheters (2.0%) did not reach the target position due to insufficient support, 2 catheters were withdrawn after failure and replaced by long sheath accompanied by intermediate catheter to complete the operation. One patient (2.0%) had a guiding catheter-related internal carotid artery petrous segment dissection accompanied by catheter opening thrombosis during the operation, and one patient (2.0%) had a guiding catheter-related carotid cavernous fistula. Perioperative catheter-related complication rate is 4.0%. All the target lesions were successfully treated and the surgical technique success rate was 100%.

Conclusions The use of the newly designed Envoy DA guiding catheter in the treatment of cerebrovascular disease requires a reasonable selection of cases and manipulation to give full play to the advantages of simple operation and sufficient support.