Case Information: A 25-year-old female patient presented with dizziness and palpitations persisting for a year, worsening over the past three days. Diagnostic evaluation revealed Secundum Atrial Septal Defect (ASD) with left-to-right shunting. Total length of the atrial septum: 43 mm. A mid-septal echo interruption of 15×10 mm (including soft edges) was observed. The defect margin is no distance (0 mm) to aorta, and 4-5 mm to superior vena cava entrance.
Clinical Strategy: Initially, the BDASD-I 20 (waist diameter) occluder was considered. However, intraoperative reassessment revealed a defect size of approximately 16mm with soft rims. Based on these findings, the team opted for the BDASD-I 26 (with 16F delivery system) occluder for closure.
Case Summary: Compared to metal occluders, biodegradable ASD occluders offer several advantages. Their patented locking design ensures effective clamping of the aortic root while the biodegradable material minimizes wear on the root. The double-disc interlocking design allows the occluder to adhere closely to the defect, promoting better sealing and endothelialization. These features make biodegradable occluders particularly advantageous for treating complex defects near the aortic root.
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