A 16-month-old Labrador-Poodle cross (case 1) and a 3-month-old German shorthaired pointer (case 2) were referred for patent ductus arteriosus (PDA) occlusion. Two-dimensional transthoracic and two- and three-dimensional transesophageal echocardiography revealed a window-like PDA characterized by a wide and short ductus. Due to the atypical PDA morphology with no ampulla in case 1, ductal occlusion was attempted with non-canine-specific Amplatzer occluder devices. However, these were too small and failed to remain stable. Amplatz Canine Duct Occluder (ACDO) devices were used with success in both cases. Due to the defects' morphology, the proximal ACDO disc protruded into the aorta but there were no signs of obstruction to aortic blood flow 16 months (case 1) and 1 month (case 2) post-occlusion. We describe two cases of a window-like type PDA that were successfully occluded with an ACDO.

中文翻译：

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二维和三维经食管超声心动图评估和成功封堵两只狗的窗状动脉导管未闭

一只 16 个月大的拉布拉多贵宾犬杂交犬（病例 1）和一只 3 个月大的德国短毛指示犬（病例 2）被转诊接受动脉导管未闭 (PDA) 闭塞治疗。二维经胸超声心动图以及二维和三维经食管超声心动图显示窗口状 PDA，其特征是导管宽而短。由于病例 1 的非典型 PDA 形态且无壶腹，因此尝试使用非犬特异性 Amplatzer 封堵装置进行导管封堵。然而，它们太小并且未能保持稳定。 Amplatz 犬导管封堵器 (ACDO) 装置在这两个案例中均获得成功。由于缺陷的形态，近端 ACDO 椎间盘突出到主动脉中，但闭塞后 16 个月（病例 1）和 1 个月（病例 2）没有主动脉血流阻塞的迹象。我们描述了两个使用 ACDO 成功遮挡的窗口型 PDA 案例。