This paper introduces several test methods of characteristics of alarm indicator lights which can be used in the medical alarm system to verify the compliance of YY 0709-2009. These methods include the direct measurement of the pulse current supply of the alarm signals, image analysing of a video and reception by photoelectric sensor. After the comparation of the advantages and disadvantages among these methods, this paper proposes a new method of signal reception. This method which used a silicon photocell as the sensor with light filter in its front, and amplified circuit in the output end then used an oscillograph as the reviewer, has resolved the testing difficulties of the flashing signal simulating by LCD, and can be applied to test the alarm indicator lights in any medical electrical equipment.
Clinical Alarms ; Equipment Design ; Signal Processing, Computer-Assisted

The Wireless Body Area Network (WBAN) is a key part of the wearable monitoring technologies, which has many communication technologies to choose from, like Bluetooth, ZigBee, Ultra Wideband, and Wireless Human Body Communication (WHBC). As for the WHBC developed in recent years, it is worthy to be further studied. The WHBC has a strong momentum of growth and a natural advantage in the formation of WBAN. In this paper, we first briefly describe the technical background of WHBC, then introduce theoretical model of human-channel communication and digital transmission machine based on human channel. And finally we analyze various of the interference of the WHBC and show the AFH (Adaptive Frequency Hopping) technology which can effectively deal with the interference.
Computer Communication Networks ; Humans ; Models, Theoretical ; Wireless Technology

Objective To evaluate the effect of embelin combined with paclitaxel on the inhibition of A 549 lung cancer cell proliferation and tumor growing in tumor bearing nude mice. Methods The anti-proliferation efficiency of embelin combined with paclitaxel were evaluated by MTT assay, and A 549 cell apoptosis were evaluated by lfow cytometry. A 549 cells were xenografted in mice to establish the animal model, which were used to evaluate the effect of anti-tumor. Results compared to saline group、embelin group and paclitaxel group, the (paclitaxel+embelin) group could inhibit the growth of A 549 cells effectively(P<0.05). The embelin combined with paclitaxel induced the apoptosis of A 549 cells more effective than paclitaxel alone. The (paclitaxel+embelin) group significantly inhibited the growth of tumor tissue. Conclusion the paclitaxel can inhibit the growth of A 549 cells, the embelin can induce the apoptosis of A 549 cells, and the combination of paclitaxel and embelin may be a potentially effective treatment for lung cancer.

Abdominal increment is applied to patients with abdominal compartment syndrome (ACS) after severe trauma,while for some patients,intra-abdominal volume increment could not close the fascia within the primary stage.For theses patients,abdominal wound skin grafting was conducted,and the planned hernia was formed.Planned abdominal hernia developed over time,and finally huge incisional hernia was formed.This article described a modified sliding myofascial flap of the rectus abdominus muscles for definitive abdominal wall reconstruction for a patient with huge planned abdominal hernia,and a good curative effect was obtained.

Objective To observe the value of myocardial performance index (Tei index) in evaluating the left ventricular function in diabetic patients with normal left ventricular ejection fraction (LVEF),and to investigate its correlation with plasma N-terminal pro-brain natriuretic peptide (NT-proBNP).Methods 96 diabetic patients with normal LVEF were selected as the observation group,50 healthy persons were selected as control group.Left ventricular Tei index was measured by color Doppler ultrasound.The plasma NT-proBNP was detected.Results The Tei index,plasma level of NT-proBNP of the observation group were (0.49 ± 0.11),(397.6 ± 39.4) ng/L,those of the control group were (0.32 ± 0.07),(101.2 ± 18.4) ng/L,the differences between the two groups were statistically significant(t =11.357,1.992,all P ＜ 0.05).There was significant positive correlation between Tei index and plasma NT-proBNP in the observation group(r =0.661,P ＜ 0.05).Conclusion Combined determination of Tei index and plasma NT-proBNP can detect early myocardial damage in patients with diabetes mellitus.

Objective To study the changes of the mood states at different time point of one-time exhaustive exercise.Methods16 participants were tested by POMS at the moments before,at,after recovery and after recovery 20 min of one-time exhaustive exercise.Results The scores of the 7 subscales got by 4 measures were used for one-way repeated measures analysis of variance.The results were showed that tension subscale scores (F (3.45) =0.335,P＞0.05,ES =0.022),anger subscale scores (F(3.45) =3.683,P＞0.05,ES =0.197),fatigue subscale scores (F(3.45 =0.863,P＞0.05,ES =0.054),depression subscale scores (F(3.45) =1.905,P＞ 0.05,ES =0.113 ),confusion subscale scores (F( 3.45) =0.601,P ＞ 0.05,ES =0.039 ) and self-esteem subscale scores (F(3.45) =2.804,P ＞ 0.05,ES =0.157 ) had no significant differences,but vigor subscale scores increased significantly (F(3.45) =8.778,P ＜ 0.01,ES =0.369).Conclusion One-time exhaustive exercises enhanced individual' s positive mood states.

Objective To investigate the clinical application of forearm arteriovenous fistula in uremia patients, and find out the cause of fistula dysfunction. Methods Three hundred and forty-five chronic uremia patients were collected. Forearm arteriovenous fistula were set up as vascular access. Recorded the relationship betwe the using condition. Results Chronic nephritis was the most, and diabetic nephropathy was lowest in the using fistula time exceeding 2 years, the internal fistula losing function occurred 103 cases in 1 year after intenal fistula establishment, the highest rate was diabetic nephropathy, then hypertension innocence renal arteriolar sclerosis. There were significant difference beween diabetic nephropathy, hypertension innocence renal arteriolar sclerosis and chronic nephritis (P<0.05). Conclusion In diabetic nephropathy and hypertension patients, the using time of fistula is short and the accidence of fistula dysfunction is high.

BACKGROUND: The mouse model of cervical heart transplantation is an ideal medical research tool for study of transplant-induced ischemia/reperfusion injury and immunological rejection.However,technical problems have limited the widespread use of mouse cervical vascularized heart transplantation.OBJECTIVE: To improve the cervical heterotopic heart transplantation in mice using the tail-cuff technique.METHODS: Isogeneic transplantation was performed from Balb/c to BALB/c mice,and allogeneic transplantation from C57BL/6 to BALB/c mice.The right common carotid artery and the external jugular vein of the recipient were equipped with a tail cuff made from 24 G and 22 G intravenous catheter,and everted over the cuff,and then connected with the aorta and the pulonary artery of donor heart,respectively.RESULTS AND CONCLUSION: A total of 36 transplants for formal experiment,12 for isogeneic transplantation,and 24 for allogeneic transplantation,were performed with a surgical successful rate of 100%.The total surgical procedure was(49.6±7.4)minutes and total ischemic time of the grafts was(28.8±4.2)minutes.In particular,the average time for vascular everting and for the reconnection of both vessels was obviously shortened.This improved tail-cuff technique shows its superiority,and can serve as an ideal method for establishing cervical heterotopic heart transplantation model in mice.

In this study,the relationship between the advanced glycation end products(AGEs) and the expressions of receptor for AGEs(RAGE),intercellular cell adhesion molecule-1(ICAM-1) was investigated.The diabetic rat model was reconstructed and the fluorescence method,RT-PCR and in-situ hybridization techniques were used to detect AGEs content and the expressions of RAGE and ICAM-1 gene in the aorta and cardiac tissues.The results showed that AGEs content in aortic and cardiac tissues increased(P＜0.01) in diabetic rats; The expressions of RAGE and ICAM-1 enhanced (P＜0.05～0.01) and were positively correlated with the quantity of AGEs accumulation(P＜0.01) in the aorta and cardiac tissue.These parameters change in the diabetic rats can be improved with aminoglumine(AG) treatment.Suggesting that AGEs might induce RAGE and ICAM-1 expression.It's postulated that AGEs binding to RAGE play an important role to result in diabetic endothelial cells dysfunction and lesion.

Objective To explore the application and effectiveness of simulated patient role play in the inquiry and the medical record writing teaching.Methods Carrying out the teaching model of simulated patient role play in the Second Clinical Medical College of Southern Medical University to the undergraduate students of grade 2009 snd 2010 in diagnose inquiry and medical record writing training class.A self-designed student questionnaire mainly about atmosphere of class,study enthusiasm,Self-evaluation of learning efficiency,the effect of the medical record writing in-class training and so on was used to do the survey.On the other hand,questionnaire for teachers included students' performance,students' writing ability,etc.100 students and 50 teachers were investigated with the survey.The percentage of the options of each question on the questionnaire was calculated in order to analyze the new teaching mode.Results The random questionnaire survey showed that 85％ (85/100) of the students believe that the new teaching mode can activate classroom atmosphere and improve learning motivation.About 62％(62/100) of the students said medical record writing errors can be obtained and corrected timely in-class training.Most students in grade 2009 have better capacity in medical record writing than those students who did not contact with new teaching mode.Conclusion The teaching model of simulated patient role play in the analogue inquiry and medical record writing is efficient and feasible in medical education,which can improve students' practical ability and is expected to be applied in undergraduate medical education.