云南几种蚤吸血量与菌栓形成的关系

在各蚤适宜的温湿度条件下,对云南6种蚤的菌栓形成率与吸血量关系的观察结果表明,蚤类的菌栓形成率与吸血量有关。     

Prevention of Pulmonary Cement Embolism by Inferior Vena Cava Filter following Vertebroplasty-related Cement Intravasation

A 77 year old woman with recent history of vertebroplasty for treatment of multiple osteoporotic lumbar vertebral body compression fractures presented for post-procedure care. A series of radiographs and cross-sectional imaging of the lumbar spine revealed an unexpected finding of cured bone cement within a small lumbar vertebral vein, the inferior vena cava and within the spokes of an inferior vena cava filter which had originally been placed two years earlier. Inferior vena cava filters have become the standard of care to prevent pulmonary embolism in the setting of deep venous thrombosis. However, cases of foreign materials becoming entrapped in filters are uncommon despite the documented frequency of intravasation of bone cement into the circulatory system following vertebroplasty procedures. This case is significant because it illustrates the rare occurrence of an inferior vena cava filter capturing intravasated bone cement and preventing its migration to the pulmonary circulation.     

Sizing gaseous emboli using Doppler embolic signal intensity

Extension of transcranial Doppler embolus detection to estimation of bubble size has historically been hindered by difficulties in applying scattering theory to the interpretation of clinical data. This article presents a simplified approach to the sizing of air emboli based on analysis of Doppler embolic signal intensity, by using an approximation to the full scattering theory that can be solved to estimate embolus size. Tests using simulated emboli show that our algorithm is theoretically capable of sizing 90% of "emboli" to within 10% of their true radius. In vitro tests show that 69% of emboli can be sized to within 20% of their true value under ideal conditions, which reduces to 30% of emboli if the beam and vessel are severely misaligned. Our results demonstrate that estimation of bubble size during clinical monitoring could be used to distinguish benign microbubbles from potentially harmful macrobubbles during intraoperative clinical monitoring.     

室温快速固化医用聚氨酯扩链剂的反应性及产物性能研究

在研究快速固化医用聚氨酯材料中,制备了以脂肪族多元醇为主的混合扩链剂（NB）,以芳香二胺MOCA为主的商品扩链剂（MB）作参照物,用红外光谱和凝胶色谱分别对NB和MB与聚醚型聚氨酯预聚体的反应过程进行了跟踪分析,并研究了各自所生成的聚氨酯材料N－PU和M－PU的性能,结果表明：N－PU中的异氰酸根反应较M－PU更彻底,而N－PU的平均分子量远大于M－PU,二体系反应的固化时间基本相同,且NB体系具有较好的初期流动性,将有利于临床操作,N－PU与M－PU材料分别呈现“C”型和反“S”型应力－应变特征,N－PU的蠕变特征不太明显且硬度较小,两种材料的环境适用性基本相同,因而B将可望取代传统的MB。