ObjectiveTo find out the most appropriate way to fix scalp electrodes for long-range video electroencephalogram on female patients. MethodsA total of 50 female patients with epilepsy who underment video electroencephalogram between May 2011 and May 2013 were divided into tonsure group, collodion group, and improvement group, with 40 patients in each group. Differences among three methods of fixation were observed and a questionnaire survey on satisfaction of patients and medical staff was conducted. ResultsWe found that the modified-method cost less time, caused less pain during electrode removal, required fewer procedures for nurses and was more acceptable by patients. ConclusionWe recommend the modified-method for female patients unless they are limited by some special conditions.
The purpose of this paper is to report the research and design of control system of magnetic coupling centrifugal blood pump in our laboratory, and to briefly describe the structure of the magnetic coupling centrifugal blood pump and principles of the body circulation model. The performance of blood pump is not only related to materials and structure, but also depends on the control algorithm. We studied the algorithm about motor current double-loop control for brushless DC motor. In order to make the algorithm adjust parameter change in different situations, we used the self-tuning fuzzy PI control algorithm and gave the details about how to design fuzzy rules. We mainly used Matlab Simulink to simulate the motor control system to test the performance of algorithm, and briefly introduced how to implement these algorithms in hardware system. Finally, by building the platform and conducting experiments, we proved that self-tuning fuzzy PI control algorithm could greatly improve both dynamic and static performance of blood pump and make the motor speed and the blood pump flow stable and adjustable.
ObjectiveTo investigate the methods and the effectiveness of arthroscopic treatment combined with repair of the cyst wall using the tendon flap of medial head of gastrocnemius muscle after resection of popliteal cyst. MethodsA retrospective analysis was made on the clinical data of 140 patients with popliteal cyst between August 2009 and June 2014, including 44 males and 96 females with a mean age of 54.68 years (range, 14-80 years). The median course of symptoms was 31 months (range, 20 days to 30 years). According to Rauschning and Lindgren criteria for popliteal cyst grade, 4 cases were rated as grade Ⅰ, 44 cases as grade Ⅱ, and 92 cases as grade Ⅲ. The preoperative Lysholm knee score was 68.99±8.23. Firstly, cyst was resected, then the hernia sac of joint capsule was repaired with the tendon flap of medial head of gastrocnemius muscle, and finally a knee arthroscopy was used for the diagnosis and treatment of intra-articular lesions. ResultsNo complication of nerve or blood vessel injury, infection, or necrosis occurred. The mean follow-up was 26 months (range, 6-64 months). During follow-up, 1 case (0.71%) had cyst recurrence. According to Rauschning and Lindgren criteria for popliteal cyst grade, 37 cases were rated as grade 0, 92 cases as grade Ⅰ, 10 cases as grade Ⅱ, and 1 case as grade Ⅲ at 6 months after operation, showing significant difference when compared with preoperative one (Z=-14.303, P=0.000); the Lysholm knee score (85.51±9.23) was significantly higher than preoperative score (t=-15.798, P=0.000). ConclusionArthroscopic treatment combined with repair of the cyst wall with the tendon flap of medial head of gastrocnemius muscle after resection of popliteal cyst is a better way to avoid recurrence.