实时磁共振成像引导下猪脑动脉溶栓治疗的实验研究

目的探讨实时MR成像引导下治疗猪脑动脉栓塞的可行性。方法选用１０只美国产的雌性小型猪作为实验对象。经皮穿刺股动脉，在实时MR成像的引导下，将３F主动追踪微导管分别插至双侧咽升动脉内。经３F微导管注入血栓堵塞咽升动脉，３０～６０min后，经３F微导管注射５０万～７５万u尿激酶溶栓。动脉增强MRA和冠状位压脂的MR冠状位T１成像评估溶栓治疗效果。结果MRA证实，猪主要由双侧咽升动脉在颅底形成微血管网供应脑的血供。在实时MR成像引导下，１０只猪的双侧咽升动脉经股动脉插管均获得成功，并完全被血栓堵塞。经动脉溶栓治疗后，血管内的血栓被溶解，堵塞的咽升动脉完全再通。结论在实时MR成像的引导下，进行猪的动脉溶栓治疗可行。     

Pilz安全产品在汽车制造行业的应用

本文给出了汽车制造业的安全需求。提出Pilz安全控制模块和安全传感器在汽车制造业中的应用。     

Nanopin plasmonic resonator array and its optical properties

A one-step electron-beam lithography process for the fabrication of a high-aspect ratio nanopin array is presented. Each nanopin is a metal-capped dielectric pillar upon a ring-shaped metallic disc. Highly tunable optical properties and the electromagnetic interplay between the metallic components were studied by experiment and simulation. The two metallic pieces play asymmetrical roles in their coupling to each other due to their drastic size difference. The structure can lead to ultrasensitive surface-enhanced Raman scattering chemical sensor arrays, etc.     

Mammography of breasts in which catheter cuffs have been retained: normal, infected, and postoperative appearances

OBJECTIVE: The purpose of this report is to show that Dacron (DuPont, Wilmington, DE) cuffs retained in breasts after the removal of Hickman catheters may result in complications requiring radiographic evaluation for subsequent management. We also describe potential complications, including infection, associated with a retained cuff and changes after the removal of a retained cuff. CONCLUSION: Because of the increased use of Hickman catheters for central vein access, Dacron cuffs more frequently are retained in breasts and are likely to be seen on mammograms. Radiologists need to be aware of the mammographic findings of a normal cuff, infected cuff, and the site of a surgically excised cuff.     

Synovectomy of the elbow and radial head excision in rheumatoid arthritis. Predictive factors and long-term outcome

We carried out a survival analysis of elbow synovectomy (ES) and excision of the radial head (RHE) performed on 171 rheumatoid elbows. The failure criteria were revision surgery (performed or desired) and/or the presence of significant or severe pain. The cumulative survival was 81% at one year which thereafter decreased by an average of 2.6% per year. The strongest predictor for success was a low preoperative range of supination-pronation when corresponding survival curves were compared. A low range of flexion-extension also predicted failure. Combining both factors gave better prediction (failure: 6.3% v 67%), but a long duration of elbow symptoms before surgery predicted failure (72%, p = 0.04). At review, there was a mean gain of 50 degrees in supination-pronation and 11 degrees in flexion-extension; both correlated with success. Failure correlated with recurrence of synovitis, elbow instability, ulnar neuropathy, poor general mobility and poor upper-limb function. The last was independently affected by the severity of RA in the ipsilateral shoulder. Our findings show that although the short-term result of ES and RHE in rheumatoid arthritis is good, the long-term outcome is poor except in a subgroup with more than 50% limitation of forearm rotation.