病因

Anencephaly and spina bifida, with an approximately equal prealence, account for 95% of the cases and cephalocele for the remaining 5%.

然而大多数NTD的确切病因仍不清楚，一个母亲或以前的同胞有NTD，则再发率是5-10%。围产期给与叶酸补充可以减少一半的发生。

Objective To investigate the causation and the function of fundus angiography in the diagnosis of macular hemorrhage.

目的 分析黄斑部出血的病因及眼底血管造影在诊断中的作用。

The shortest time to operation was 8 months;the longest time was 56 months,averaging 24 months. The high risk factors of HJD included bad acetabular ecstrophy angle,and anteversion angle.The etiological factor and tendency of dislocation in operation are also risk factors.

结果：平均随访24个月(8~ 56个月)，分析其中期疗效，髋臼外翻角和前倾角的异常是造成人工全髋关节置换术后脱位的高危因素，术前病因、术中脱位倾向是危险因素。

This is necessary for tumor diagnosis, anticancer therapy, and the fundamental research of tumor pathology.

这将为肿瘤的临床诊治以及肿瘤病因的基础研究提供必要的条件。

Objective To analyze the cause and the anticoagulant therapy for patients with atrial fibrillation.

目的：分析我院心房颤动住院患者的病因及抗凝治疗现状。

Coarctation of the aorta is a rare hereditary disorder that is one of the most common causes of hypertension in children.

主动脉缩窄是一种并不多见的遗传性疾患，但却是儿童高血压的主要病因之一。

Six cases were found to have normal direction of flow,but in the functional test of the involved upper limb,the reversal flow peak value of the ill vertebral artery increased,or the direction of flow turned from normal to reverse.2-dimensional ultrasound showed that 90% of subclavian steal syndrome were caused by arteriosclerosis,10% caused by aortitis.

结果 TCD检查时，24例患者中18例均表现为椎动脉血流反向，肢体束臂试验反向血流增加，6例血流方向正常，束臂试验患侧椎动脉反向峰值血流速度增快，或由正向变为反向。二维超声示引起锁骨下动脉盗血综合征的病因动脉硬化占90％，大动脉炎占10%。

One hundred seventy-seven eyes of 161 patients consecutive who had corneal edema resulting from Fuchs endothelial dystrophy, pseudophakic bullous keratopathy, aphakic bullous keratopathy, failed graft or iridocorneal endothelial syndrome.

连续的161位患者的177只眼，都有角膜水肿。病因分别为FUCHS角膜内皮营养不良，人工晶体眼大泡性角膜病变，无晶体眼大泡性角膜病变，移植术失败和虹膜角膜内皮综合征。

Neural tube was formed by the apophysis,bend and close of neural crest.

它们在病因学上是多因素的，是遗传学因素和环境因素共同作用结果。

Objective To investigate the etiopathogenisis,diagnosis and treatment of abdominal apoplexy.

目的探讨自发性腹腔出血的病因、诊断和治疗方法。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。