Objective To investigate the assembl ing and cl inical appl ication of the video output system util izing teaching sight glass of surgical microscope. Methods Between June 2009 and April 2010, 10 patients with craniocervical junction malformation were treated by the method of transoral-transpharyngeal approach with the microscope and videooutput system under the direct vision. There were 6 males and 4 females with an average age of 32 years (range, 13-52 years). Three cases had the history of injury and 7 cases had no history of definite injury. The disease duration was from 10 months to 12 years (median, 5 years). The main cl inical symptoms were brevicoll is or torticoll is; 2 patients had malformation appearance and 4 patients had occi put-cervical pain. The physical examination showed that all patients had the symptoms that upper cervical cord was damaged; the imaging examination showed that all patients had basilar invagination, atlantoaxial dislocation, and ossification. Before and after operations, the functions of nerve were evaluated by Japanese Orthopaedic Association (JOA) scoring, the improvement rate was calculated to evaluate the efficacy. Results By the video output system assembly, 15.1 mill ion pixels high-definition images could be collected and reached 1 920 × 1 080 pixels video camera, so assistants or medical students could watch the cl inical operation directly. All patients had no neural injury or cerebrospinal fluid leakage during operation. Basilar invagination and atlantoaxial dislocation were corrected. Infection at incision occurred in 1 patient; other incisions healed by first intention without early compl ication. All patients were followed up 6-16 months (mean, 13.5 months). The average JOA score was increased from 10.2 preoperatively to 15.5 at 6 months postoperatively with an improvement rate of 77.9%. At 12 months after operation, bony fusions were achieved. Conclusion The miscroscope and video output system can improve the effectiveness of the original surgical microscope. It makes visual fields much clearer and operations more accuratewith a few compl ications.
Objective To explore the application value of standardized patient (SP)-based teaching method in the teaching of medical history taking for international students. Methods During the autumn semester of 2017, 96 international medical students were randomly divided into two groups, with 48 students in the SP-based teaching group and 48 students in the conventional teaching group. The test scores of medical history taking in English in internal medical practice of the two groups were compared. The teaching feedback from the international students was collected and evaluated by online questionnaire survey. Results The scores of medical history taking examination in internal medical practice of the students using SP-based teaching method were higher than those of the students using conventional teaching method (86.5±9.7 vs.78.2±10.6), and the difference was statistically significant (t=3.983, P<0.001). According to the questionnaire analysis, in terms of whether the current teaching method could enhance learning interest, improve communication ability, promote clinical skills, train clinical thinking, and highlight humanistic care, students with positive views in the SP-based teaching group accounted for 92.86%, 97.62%, 85.71%, 90.48%, and 95.24%, respectively, while students with positive views in the conventional teaching group accounted for 90.00%, 87.50%, 82.50%, 77.50%, and 97.50%, respectively, and the differences were not statistically significant (P>0.05). Conclusions Well-trained SP has a good application value in clinical practice of internal medicine and diagnostics teaching for international students. SP-based teaching method has been accepted and supported by the majority of international medical students who have experienced it.
The gait acquisition system can be used for gait analysis. The traditional wearable gait acquisition system will lead to large errors in gait parameters due to different wearing positions of sensors. The gait acquisition system based on marker method is expensive and needs to be used by combining with the force measurement system under the guidance of rehabilitation doctors. Due to the complex operation, it is inconvenient for clinical application. In this paper, a gait signal acquisition system that combines foot pressure detection and Azure Kinect system is designed. Fifteen subjects are organized to participate in gait test, and relevant data are collected. The calculation method of gait spatiotemporal parameters and joint angle parameters is proposed, and the consistency analysis and error analysis of the gait parameters of proposed system and camera marking method are carried out. The results show that the parameters obtained by the two systems have good consistency (Pearson correlation coefficient r ≥ 0.9, P < 0.05) and have small error (root mean square error of gait parameters is less than 0.1, root mean square error of joint angle parameters is less than 6). In conclusion, the gait acquisition system and its parameter extraction method proposed in this paper can provide reliable data acquisition results as a theoretical basis for gait feature analysis in clinical medicine.
目的：探討蛋白酶體抑制劑——硼替佐米對初治多發性骨髓瘤的療效及對移植造血干細胞采集的影響。方法：對一例初發的中年男性多發性骨髓瘤患者使用硼替佐米+地塞米松+反應停（VTD）的方案進行化療，獲得緩解后采集外周血造血干細胞。結果：應用以硼替佐米為基礎的方案治療3個療程后，患者即獲得完全緩解；完成4個療程化療后成功采集足夠數量的外周血造血干細胞；完成6個療程化療后，進入維持治療，至今已完全緩解17個月。治療過程中除惡心、嘔吐外無其他明顯不良反應。結論：硼替佐米用于初治多發性骨髓瘤有良好的治療效果，不良反應少，不影響造血干細胞采集。
In order to investigate the effect of deep brain stimulation on diseases such as epilepsy, we developed a closed-loop electrical stimulation system using LabVIEW virtual instrument environment and NI data acquisition card. The system was used to detect electrical signals of epileptic seizures automatically and to generate electrical stimuli. We designed a novel automatic detection algorithm of epileptic seizures by combining three features of field potentials: the amplitude, slope and coastline index. Experimental results of rat epileptic model in the hippocampal region showed that the system was able to detect epileptic seizures with an accuracy rate 91.3% and false rate 8.0%. Furthermore, the on-line high frequency electrical stimuli showed a suppression effect on seizures. In addition, the system was adaptive and flexible with multiple work modes, such as automatic and manual modes. Moreover, the simple time-domain algorithm of seizure detection guaranteed the real-time feature of the system and provided an easy-to-use equipment for the experiment researches of epilepsy control by electrical stimulation.
This paper reports the study and design of a visualization system of the ultrasonic rhinitis therapeutic apparatus with the function of endoscopic sinus. On Linux operating platform, we captured the video data of a video capture card that connected the endoscopic sinus using Video4Linux (V4L2) that was provided by the operating system. The video images were displayed by Qt. The visualization system solved the problem that the current ultrasonic rhinitis therapeutic apparatus had to rely on the large and expensive endoscopy equipment. And this simplified the doctors' operation, met the need of monitoring nasal cavity in the process of operating, greatly reduced the costs of treatment and would contribute to the promotion of the instrument. As a result, it has been tested that the nasal endoscopic image achieved by the system is clear and smooth, and fully meet the clinical needs of ultrasonic treatment of rhinitis.
Abdominal imaging is one of the important clinical applications of magnetic resonance imagining, but image degradation due to respiratory motion remains a major problem. Retrospective respiratory navigator gating technique is an effective approach to alleviate such degradation but is subject to long scan time and low signal-to-noise ratio (SNR) efficiency. In this study, a modified retrospective navigator gating technique with variable over-sampling ratio acquisition and weighted average reconstruction algorithm is presented. Experiments in phantom and the imaging results of seven volunteers demonstrated that the proposed method provided an enhanced SNR and reduced ghost-to-image ratio compared to the conventional method. The proposed method can also be used to reduce imaging time while maintaining comparable image quality.
In recent years, wearable devices grew up gradually and developed increasingly. Aiming at the problems of skin sensibility and the change of electrode impedance of Ag/AgCl electrode in the process of long-term electrocardiogram (ECG) signal monitoring and acquisition, this paper discussed in detail a new sensor technology–fabric electrode, which is used for ECG signal acquisition. First, the concept and advantages of fabric electrode were introduced, and then the common substrate materials and conductive materials for fabric electrode were discussed and evaluated. Next, we analyzed the advantages and disadvantages from the aspect of textile structure, putting forward the evaluation system of fabric electrode. Finally, the deficiencies of fabric electrode were analyzed, and the development prospects and directions were prospected.