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Yanyan Hu,1,2 Erpeng Qi,1 Fangyi Liu,1 Yuhan Lu,1 Shuilian Tan,1 Ya Sun,1 Zhiyu Han,1 Ping Liang,1 Xiaoling Yu1 1Department of Interventional Ultrasound, General Hospital of People’s Liberation Army, Beijing, China; 2Medical Department, First Affiliated Hospital of PLA General Hospital, Beijing, China Objectives: To evaluate the effectiveness of iodine-125 (125I) seed implantation for pancreatic cancer (PC), and preliminarily evaluate the clinical value of a self-developed three-dimensional (3D) visualized seed planning and navigation system in 125I seed implantation for treatment of PC. Patients and methods: Our team retrospectively reviewed 25 PC patients who underwent 125I seed implantation between December 2010 and November 2016. The patients were divided into two groups: 3D visualization preoperative planning group (12 patients, 13 lesions) and two-dimensional (2D) regular group (13 patients, 14 lesions). We compared and analyzed the parameters of the two groups, such as number of needle insertions, one-time treatment success rate, proportion of added seeds, local control rate, rate of complications, rate of pain relief, and the survival rate and risk factors of the two groups. There was no significant difference in clinical data of the two groups. Results: 125I seed implantation was performed successfully in all PC patients, with no occurrence of serious complications during and after the procedure. The one-time treatment success rate of 3D group (80%) was higher than that of 2D group (45.5%) (P

The purpose of this paper is to study the remove insurance time with different stiffness of typical MEMS SA Then we used ANSYS LS/DYNA finite element analysis of the structure, obtained the simulation process of slider displacement-time relationship, and got the numerical remove insurance time. By comparing theoretical analysis and simulation analysis, we can get the MEMS S&A device's remove insurance time variation with spring stiffness, and verify the correctness of the simulation analysis, which provide a theoretical basis for the design of the type MEMS S&A device.

In this paper, a MEMS SA the other item is the centrifugal insurance mechanism can effectively restrict the slider to ensure the safety of the device when primary insurance accident arming in handling transportation.