BACKGROUND Numerous studies have demonstrated the accuracy of epiaortic ultrasound scanning (EAS) for assessing ascending aortic disease. It remains unclear whether EAS changes the incidence of perioperative stroke after off-pump coronary artery bypass (OPCAB). METHODS We studied a retrospective cohort of 2292 patients who underwent isolated OPCAB from January 2001 to December 2011. Patients ...

Limited resection can be a therapeutic approach in patients with cirrhosis with very low remnant hepatic function after resection. In this study, two hilar vascular clamping methods (hilar selective clamping In 13] and hilar lobar clamping method In 8]), which were used for resection ofhepatocellular carcinoma in patients with cirrhosis, were compared based on cardiovascular stability during cl...

Dynamic stabilization operation can effectively improve the mechanical performance of ballast bed by using stabilizer. To effect, a rigid-flexible coupling dynamics simulation model stabilizer-ballast system was established according to actual structure stabilizer, and effect different parameters stabilizer on analyzed. The results showed that: maximum value lateral displacement response sleepe...

Experiments with a cam-type clamp tool were carried out to overcome the difficulty of transporting and installing large-diameter mono-piles for offshore wind turbines. Using experiments method design small wedge-type clamping mechanism using cam teeth made 40Cr material resulted in maximum friction mechanism. A single was created hoist Through force analysis Automatic Dynamics Analysis Mechanic...

In order to provide secure clamping with a low thermal conductance, some temperature detectors are held point contact sapphire ball clamps. While this method is increasingly common, the conductance across interface has not been well studied. We present direct measurement of such clamps between 200 and 600 mK, force approximately $$2.7\,\pm 0.3\,\hbox {N}/\hbox {clamp}$$ . The single sapphire-on...

In manipulating the assembly of micro-components, symmetrical microgripper mechanism often causes destruction, damaging those components during manipulation, due to phenomenon non-uniform clamping force output from clamp. From this disadvantage, a new asymmetric structure is proposed with stable force. The will have smaller displacement than that symmetric structure. Therefore, increase gain, f...

This paper discusses the process of modelling and parameter selection for creation electronic wedge brake system (EWB). The involves a permanent magnet DC engine (PMDC) that drives motor, gear leadscrew core. proposed model is simpler more flexible which can be used in both most well-known EWB designs either natural or optimized EWB. motor rendered according to specifications. angle profile cen...

celiac artery aneurysm is a rare visceral aneurysm, comparising only 4 % of them. in this article, an innovative surgical method is presented for the treatment o f such aneurysms. a 53 year old female referred to our center with epigastric pain and a mass in the region, which was diagnosed as a case of celiac artery aneurysm by using different imaging techniques. during the operation, according...