Through summarizing the definition, concept, and development of patient registry, and also retrieving ClinicalTrials.gov, we introduce its application areas, application range, disease, research number. Based on the application situation, we present the challenges faced now and future development of direction.
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.
ObjectiveTo explore the diagnosis and surgical treatment of hepatic hydatid. MethodsWe collected 51 cases of liver hydatid treated in our department from January 2008 to September 2012, and retrospectively analyzed its diagnosis and surgical treatment. ResultsCT and ultrasonography were both effective in diagnosing liver hydatid (P>0.05). Several surgical methods were all effective in the treatment of hepatic hydatid. ConclusionCT and ultrasonography are effective in the diagnosis of hepatic hydatid. Economic, convenient, and noninvasive ultrasound can be used as a routine examination. Combined with CT examination, the diagnosis of hepatic hydatid can be intensely enhanced. Treatment of hepatic hydatid should be individualized.
Pulse waves contain rich physiological and pathological information of the human vascular system. The pulse wave diagnosis systems are very helpful for the clinical diagnosis and treatment of cardiovascular diseases. Accurate pulse waveform is necessary to evaluate the performances of the pulse wave equipment. However, it is difficult to obtain accurate pulse waveform due to several kinds of physiological and pathological conditions for testing and maintaining the pulse wave acquisition devices. A pulse wave generator was designed and implemented in the present study for this application. The blood flow in the vessel was simulated by modeling the cardiovascular system with windkessel model. Pulse waves can be generated based on the vascular systems with four kinds of resistance. Some functional models such as setting up noise types and signal noise ratio (SNR) values were also added in the designed generator. With the need of portability, high speed dynamic response, scalability and low power consumption for the system, field programmable gate array (FPGA) was chosen as hardware platform, and almost all the works, such as developing an algorithm for pulse waveform and interfacing with memory and liquid crystal display (LCD), were implemented under the flow of system on a programmable chip (SOPC) development. When users input in the key parameters through LCD and touch screen, the corresponding pulse wave will be displayed on the LCD and the desired pulse waveform can be accessed from the analog output channel as well. The structure of the designed pulse wave generator is simple and it can provide accurate solutions for studying and teaching pulse waves and the detection of the equipments for acquisition and diagnosis of pulse wave.