Based an ordinary ECG, this paper deals with a portable monitor system able to measure the values of QRS. With a liquid crystal display (LCD), this monitor is suitable for China's special condition. Besides developing the overall scheme of the system, this paper also performs the designs for the hardware and software. The 80196 single chip microcomputer is taken as the central microprocessor to process and analyze the realtime ECG signals. With the performances of the ordinary monitor, this monitor also has such functions as arrhythmia analysis, HRV analysis, alarm, self-freeze and paper self-advance. Being convenient to carry, this monitor can be powered by alternate current (AC) or direct current (DC). Stability, low power consumption and low cost are emphasized on in the hardware design and structured design is applied to the software design. With a high versatility and a low cost, this monitor has a valuable reference to China's monitor.

The number of detector rows has been the focus of the CT development for decades.During the last decade,CT development has reached a threshold which is represented by coverage,mechanics,resolution and dosage.In order to break this bottleneck,two further development directions have been shown in recent years,of which,one is to increase the number of the detector rows,and the other is to revolutionize the material of detector to explore new clinical applications.Generally,HDCT opens the new era for whole CT modality,bringing the radiologists the high-resolution image,spectral imaging,large coverage and low dosage application.

The check & acceptance is an important component of medical equipment management,and it is the key to guarantee the quality,application and safety of medical equipment.In this article,we introduce some methods to check & accept the medical equipment according to our own experience.

Objective:This study was to study effect of keeping ying and weiqi in balance on cardiac muscular collagen Ⅰ,collagen Ⅲ,angiotensinⅡ in spontaneous diabetes rats,and provide new thoughts for prevention and treatment for diabetic cardiomyopathy.Methods:40 spontaneous diabetes rats were divided into four groups at random:spontaneous diabetes control group,diformin group,Guizhi Decoction group and Huanglian Jiedu Decoction group.Except control group,each group was given intragastric administration for 12weeks.Blood glucose,collagenⅠ,collagen Ⅲ,collagenⅠ/collagen Ⅲ,angiotensin Ⅱ were determined.Euzymelinked immunosorbent assay and radio-immuniy method were used.Results:Blood glucose in Huanglian Jiedu Decoction group and diformin group decreased;Compared respectively with diformin group and control group,collagenⅠdecreased obviously and collagen Ⅲ increased signifi cantly in Guizhi Decoction group,and the collagenⅠ/collagen Ⅲ decreased.Compared with diformin group and control group,cardiac muscular homogenate AT-Ⅱ contents decreased in both of Guizhi Decoction group and Huanglian Jiedu Decoction group.Conclusion:Guizhi Decoction can decrease the content of collagen Ⅰ,AT-Ⅱ and collagenⅠ/collagen Ⅲin cardiac muscular,and increase content of collagen Ⅲ,then prevent and treat cardiac muscular collagen reconstruction and myocardial fibrosis.Huanglian Jiedu Decoction can decrease the content of AT-Ⅱ,and decrease collagenⅠ/ collagen Ⅲ,collagenⅠ slightly,and can improve cardiac muscular collagen reconstruction.Keeping ying and weiqi in balance is a new thought for prevention and treatment for diabetic cardiomyopathy.

To explore the effect of high glucose on the NF-κB/IκB signal pathway in cultured rat glomerular mesangial cells. The results showed that high glucose increased the degradation of IκB-α and the translocation to nucleus of NF-κB. These changes could be reverted mostly by MG132, a proteasome inhibitor. It suggests that the activation of the NF-κB signal pathway by high glucose concentration may probably be via the ubiquitin-proteasome pathway.

Adolescent ; Adult ; Child ; Female ; Humans ; Male ; Nasal Septum ; injuries ; Skull Fractures ; diagnostic imaging ; Tomography, Spiral Computed ; Young Adult

BACKGROUND: The dynamic characteristics of electroencephalogram (EEG) include a decrease in the chaotic dimension, the correlation dimen sion, the Lyapunov exponent, the chaotic complexity, the freedom of EEG and an enhanced synchronization and periodicity of the EEG from several minutes to tens of minutes before epileptic seizures. All these characteristics prefigure the forthcoming seizures. Some studies have proven that the non linear dynamical system can be used as a feasible approach to explore the potential variables for describing the chaos portrait of EEG. OBJECTIVE: To analyze the electric characteristics of EEG signal in the epileptic seizures in rat model by investigating the nonlinear dynamical variables, such as the approximate entropy (ApEn) and correlation dimen sion. DESIGN: Observational and experimental study based on animals. SETTING: Department of Medical Engineering, Department of Gastroen terology, Second Artilleryman General Hospital of Chinese PLA; Department of Physics, Faulty of Biomedical Engineering, Fourth Military Medical Uni versity of Chinese PLA. MATERIALS: From September 2001 to January 2002, this study was conducted at the Complexity Laboratory of the Biomedical Department of the Fourth Military Medical University of Chinese PLA. Six male SD rats,weighing 150- 200 g, were selected.INTERVENTIONS: After intraperitoneal injection of chloral hydrate (0. 5 mL), the male SD rats were deeply anesthetized. When their EEG signal became stable, bemegride injection was diluted at 1:1 with saline and was given on a volume of 0.5 mL to the rats intraperitoneally. After a while,the epileptic seizures started marked by a spasm with a deep roar. The entire epileptic seizures were recorded. According to the shape of EEG waves and the corresponding symptoms of the rats during their seizures, data of the four phases, referring to normal condition, preictal phase, ictal phase and postictal phases of epileptic seizures, were selected for nonlinear analysis. The variations of the ApEn and the correlation dimension were calculated.MAIN OUTCOME MEASURES: In the four phases of the seizures, before seizures, preictal phase, ictal phase and postictal phases, the changes in the ApEn and correlation dimension were observed.RESULTS: All the 6 rats entered the statistical procedure. During epilepsy, the ApEn and correlation dimension of the EEG signal in ictal phases (0. 447 ±0. 126, 2. 166 ±0. 377) decreased significantly while those in preictal phases(0. 807 ±0. 182, 4. 773 ±0. 319) and postictal phases (1. 241 ±0. 125, 6. 042 ±0. 373) (t = -3. 984to 17. 902, P ＜0. 01). The ApEn and the correlation dimension of the EEG signal in preictal and ictal phases had significant difference with those observed under normal conditions (1.313 ± 0. 090, 6. 405 ± 0. 694) (t = -5. 228 to 12. 740, P ＜ 0. 01 ).CONCLUSION: The changes in ApEn and correlation dimension showed by nonlinear dynamical approach in this study reflect the characteristics of EEG signals in preictal time, ictal time and postictal timeof the epileptic seizures and the differences among them. Additionally, they also reveal the laws in the changes of the complex ictal EEG signal.

Objective:To establish a model of mandibular impact third molar extraction with common dental materials for pre-clinical trai-ning.Methods:Based on the characteristics of the common dental materials,the anatomy and extraction skill of mandibular impact third molar,the dental model for mandibular impact third molar extraction was designed and made.Then,this dental model was placed in the head-simulation model as required,and used by the dentists and the students.The questionnaire was designed and used to evalu-ate the effects of the model.Results:A new method of designing and making a dental model for mandibular impact third molar extraction with the common dental materials was established successfully.The questionnaire results showed that all the dentists and students agreed that this model could simulate the mandibular third molar extraction procedure.Conclusion:Simulation model of the mandibular third molar extraction can help students for the following clinical practice.

Objective To compare the incidence of cardiopulmonary complications between treatment of video assisted thoracoscopic operation and traditional thoracotomy operation in elderly patients with non-small cell lung cancer.Methods 122 cases of elderly patients with non small cell lung cancer were treated in our hospital from Mar 2010 to Jun 2014,and randomly divided into observation group (therapeutic lobectomy by video assisted thoracoscopic operation) and control group (therapeutic lobectomy by traditional thoracotomy operation) (n=61,each).The postoperative cardiopulmonary complications and relevant indexes of cardiopulmonary function were analyzed and compared between the two groups.Results Before operation,there was no significant difference in the relevant indexes of cardiopulmonary function between the two groups (P＞0.05).After operation,the forced expiratory volume in one second (FEV1) and maximal ventilatory volume (MMV) were higher and the heart rate was lower in observation group than in control group (t=3.682,2.243,5.677,all P＜0.05).The incidence of cardiopulmonary complication was lower in observation group than in control group (13.1％ vs.27.9％,x2 =4.075,P=0.044).Conclusions Video assisted thoracoscopic operation is better for the recovery of cardiopulmonary function,and can reduce cardiopulmonary complication in elderly patients with non-small cell lung cancer.

AIM: To investigate the molecular mechanism by which the SARS-CoV S protein induces chemokine IP-10 in airway epithelial cells.METHODS: cDNA microarrays were used to screen the gene expression profiles of human bronchial epithelial cells(16HBEs) stimulated by SARS-CoV S protein.In addition,RT-PCR,EMSA,and Western blotting were performed to analyze the phosphorylation of JAK/STAT signal pathway.The changes of IRF-1 and IP10 gene expression and the influence by the corresponding inhibitors were analyzed.RESULTS: IRF-1,a key transcription factor of the JAK/STAT signal pathway,was activated in human bronchial epithelial cells after stimulation by the S protein of SARS-CoV.The IP-10 gene expression was detected 2 h following the phosphorylation of STAT1 after 15 min,which was blocked by STAT1or JAK2 inhibitors.Electrophoretic mobility shift assay(EMSA) demonstrated that the nuclear proteins bound to ISRE and GAS but not NF-?B DNA motif.CONCLUSION: The SARS-CoV S protein induces IP-10 gene expression in human bronchial epithelial cells through activation of the JAK/STAT signal pathway,suggesting that the JAK/STAT signal pathway activated by virus plays key roles in virus infection related acute lung injury.