颅内直母管动脉旁瘤在线圈栓塞后三维脉动流的数值模拟

对部分栓塞的不同线圈位置的血液流动进行数值模拟,以建议线圈栓塞的有效位置。在血液为不可压缩、牛顿流体和刚性血管假定下,利用人工压缩性方法求解三维N-S方程。在脉动情况下,计算了沿肿瘤壁面的平均剪应力、入流率、速度场和压力场。基于管径的最大/最小Reynolds数是475/152,Womersley数是2.5,这些值表示了中等脑动脉。主要的结果是:与无栓塞情况比较,栓塞后的壁面平均剪应力、入流率、瘤中速度和压力显著地减小;在瘤颈近端或远端被栓塞后的壁面平均剪应力和流入率都比瘤的顶部被栓塞后的小,而近端被栓塞后的壁面平均剪应力和流入率最小。既然小的入流率和低的剪应力提供了促使血栓形成的环境,那么近端或远端瘤颈应该是线圈栓塞最合适的位置。

非手术治疗脑动脉瘤的新方法

一种创伤性极小的脑动脉瘤治疗方法可采用一种柔软的外科材料制成线圈堵塞通向动脉瘤的血管而使其血流不能到达病患部位，以此预防动脉瘤体的破裂。该方法亦可称为分离的线圈栓塞形成术；手术费用较低，且患者恢复较快，从而使以往被认为不能手术的脑动脉瘤得以治愈。

医源性损伤致肋间动脉破裂出血介入治疗2例

胸腔穿刺术主要用于胸腔积液诊断和气胸、胸腔积液的治疗,该手术操作的典型并发症包括气胸、出血(包括血胸)和复张性肺水肿^([1])。胸腔穿刺引起肋间动脉损伤造成大出血为罕见的并发症;文献中报道的医源性损伤病例相对较少,既往的报道主要为外科手术的并发症^([2])。对肋间动脉大出血的及时处理很重要,我们将2例胸腔穿刺术致肋间动脉大出血成功行介入止血(1例明胶海绵栓塞及1例弹簧圈栓塞)的病例报道如下。

Transarterial coil embolization in treatment of gross hematuria following self-inflicted stab wound in a horseshoe kidney

Horseshoe kidney is an uncommon anomaly of the urinary system with an increased risk of injury during penetrating and blunt abdominal traumas. Selfinflicted abdominal stab wound, a rare type of abdominal injury, accounts for only a small percentage of suicidal attempts and may be infrequently encountered by physicians in trauma centers. Psychiatric disorders and alcohol or drug abuse are common risk factors in cases of self-stabbing. Here we report a rare case of self-stabbing of a horseshoe kidney. The case was a 19-year-old man with self-inflicted abdominal stab wound who was referred to our departmentof radiology due to re-occmTed gross hematuria three days after exploratory laparotomy and surgical repair of injured abdominal organs. A horseshoe kidney was incidentally found in the patient＇s abdominal computed tomography. Renal angiography revealed active contrast extravasation from one of the segmental arteries. Selective transarterial embolization with a coil was successfully performed to control the hematuria.