经皮肺动脉瓣植入术在肺动脉瓣反流患者中的临床应用

经皮肺动脉瓣植入术(PPVI)在我国作为一种新兴的技术,开展相对较晚,但随着我国医疗水平的不断提高以及临床对于右心室流出道梗阻的先天性心脏病患者术后出现重度肺动脉瓣反流的不断重视,PPVI在我国得到了飞速发展。近十几年来,欧美国家已在临床成熟应用PPVI,相对于传统外科手术而言其具有微创、可重复性、术后疗效好等优点。现对PPVI在肺动脉瓣反流患者中的临床应用进行叙述。     

三种氨基酸对兔血浆皮质酮浓度的影响

侧脑室注射甘氨酸使健康家兔和烧伤家兔血浆皮质酮浓度降低;注射L—谷氨酸和L—天冬氨酸使健康家兔血浆皮质酮浓度升高,但不能使烧伤后升高的血浆皮质酮浓度发生改变。提示这三种氨基酸作为神经递质参与下丘脑—垂体—肾上腺皮质轴的调控。烧伤刺激通过下丘脑引起内分泌紊乱,这种紊乱与L—谷氨酸和L—天冬氨酸失控有关。     

Dynamic aspects of expanding cava septi pellucidi et Vergae

Summary Two paediatric patients with expanding cysts of the cava Vergae et septi pellucidi are presented. In the first patient, consecutive CT scans showed agrowing cavum thought to be responsible for his dramatic increase in head circumference. In the other patient, the expanding cavum was discovered because a routine skull X-ray after minor head trauma revealed marked impressiones digitatae.Both patients were successfully treated with stereotactically placed internal shunts from the cysts via the lateral ventricle to the subarachnoid space. During this procedure, contrast medium was instilled, and the cysts were visualized on postoperative CT scans.Some dynamic aspects of such expanding cava are discussed.