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In recent years, most areas of our country are suffering transmission line ice-coating disasters caused by cold weather. Aiming at this phenomenon, this paper designs a robot that not only can avoid the various fittings on the line, but also can cross the tension tower of phase line to jumper line. According to the development status of the deicing robot at home and abroad, the specific environment of the transmission line, as well as the function of crossing obstacle and tension tower, the design specifications and structural scheme is presented. On the basis of the mechanical structure design, the motion characteristics of deicing robot is researched, and the virtual prototype of the robot is simulated based on ADAMS, and key research is the factors which affect the gravity center when the robot crosses obstacle and tower. With the analysis of factors mentioned, robot stability greatly improved.

Objective: To evaluate the outcomes of combined organ resection for T4b gastric cancer, and determine the operative indication and prognostic factors., Methods: Clinical data of 96 cases with T4bN0-3bM0 gastric cancer treated with combined organ resection in Tianjin Cancer Hospital from 2001 to 2005 were analyzed retrospectively., Results: Twelve patients developed postoperative complications, including pancreatic fistula (n=4), abdominal infection(n=5), pulmonary infection(n=3), all of which were managed with conservative treatment. There were no perioperative deaths. All the patients had postoperative follow up with a median of 73 months. The 1-, 3-, 5-year overall survival rates were 70.5%, 42.1%, and 23.5%, respectively. Univariate analysis showed that Borrmann type, histologic type, lymph node staging, and pancreatic invasion were associated with the survival in patients with T4b gastric cancer(both P<0.05). Multivariable analysis showed that lymph node staging and histologic type were independent prognostic factors(all P<0.05)., Conclusion: For well differentiated gastric cancer with lymph node staging of pN0 or pN1, combined organ resection may offer survival benefit.

Background: The incidence of carcinoma of the pancreas is increasing in the world. Pancreatic carcinoma is characterized by early local extension to contiguous structures and metastases to regional lymph nodes and the liver. This study was conducted to increase the rate of pancreatoduodenectomy combined with vascular reconstruction., Methods: Pancreatoduodenectomy with vascular reconstruction was performed for 79 patients at a number of hospitals in Fujian Province, Zhejiang Province, Shanghai and Xinjiang Uyghur Autonomous Region from April 1994 to December 2003. One of these patients also underwent right hemicolectomy; but all received through superior mesenteric vein (SMV)-portal vein (PV) reconstruction. The reconstructions of the superior mesenteric artery (SMA) and hepatic artery (HA) were performed in 4 patients, and reconstructions of the SMA or HA were carried out in 7 and 4 patients respectively. Partial reconstruction of the inferior vena cava (ICV) was done in 2 patients when the tumor was adhering to the wall of the inferior caval vein., Results: Four patients died during the peri-operative period, with a mortality rate of 5%. No complications such as biliary or pancreatic fistulae or artificial blood vessel infection were noted. Histological examination showed one patient with neuroendocrine cancer and the other 78 patients with adenocarcinoma of the pancreatic head. Resected endothelia and vascular margins proved to be microscopically tumor-free. Follow-up for 3 months to 10 years for all except two patients showed 7 of the 9 patients who had undergone resection and reconstruction of the SMA and HA died 7 months or 4 years after operation and 37 survived for over 3 years and 12 for more than 5 years. The rest are still under follow-up., Conclusion: Pancreatoduodenectomy with vascular reconstruction for carefully selected patients with carcinoma of the pancreatic head has proved to be a safe and reliable treatment, capable of raising the rates of tumor resection and survival.