As a substitute of the traditional auscultoscope, the midget ultrolow power consumption ECG auscultoscope combines the traditional one with the electrocardiograph, which is easy to operate and carry.

Medical vacuum knife (MVK) is a new approach for liver surgery. This paper introduces its principles and applications. Some detailed issues related to MVK are also presented such as its differences from other methods, its development and application perspective to abdominal surgery.

The latest domestic and foreign development of artificial vision technology is introduced in this paper. Its prospect and feasibility in China are mentioned too.

This paper introduces the applications of network technology, wire and wireless technologies to designs of medical equipments. The theories and applications of such technologies are presented as the ones of serial communication, concurrent communication, USB interface, Bluetooth HomeRF, wireless network communication and GPRS.

Objective To investigate the circadian change of autonomic nervous system in hyperthyroidism (HT) patients. Methods Recording 24 h dynamic electrocardiography from 33 HT patients( HT group) and 35 controls (control group). The cardiac autonomic nervous function was evaluated by the time domain and frequency domain analysis of heart rate variability( HRV). Results Comparing with control group, the SDNN, SDANN, ASDNN and rMSSD were significantly lower in HT group[ (82.3 ± 29.0)ms vs. (139.4±40.2 ) ms, ( 75.0 ± 27.4) ms vs. ( 130.3 ± 43.9) ms, (29.9 ± 14.9 ) ms vs. (57.3 ± 14.4) ms,( 19.8 ± 10.9 ) ms vs. (29.5 ± 9.4) ms ] (P ＜ 0.01 or ＜ 0.05 ), the long term total power (TP), high frequency (HF), low frequency (LF) and very low frequency (VLF) were significantly lower in HT group [ (566.1±573.2) ms2/Hz vs. ( 1894.2 ± 984.3)ms2/Hz, (68.1 ± 88.9 ) ms2/Hz vs. (232.7 ± 155.5 ) ms2/Hz, ( 127.4 ±163.0) ms2/Hz vs. (551.3 ± 390.6) ms2/Hz, (330.3 ± 300.6) ms2/Hz vs. (1073.2 ± 570.2) ms2/Hz] (P ＜0.01 ). Comparing with control group, short term VLF was higher in HT group during most time in 24 hours (P＜ 0.05 ). Short term LF was higher in HT group mainly in day time (P＜ 0.05 ). Short term HF was higher in HT group occasionally in the whole day (P＜0.05). Short term LF/HF didn't show significant difference between HT group and control group at most time points (P＞0.05).Conclusion In HT patients, cardiac chronotropic property is impaired, sympathetic activity increases in whole day, vagal activity increases correspondently but the increase in day is more marked than that in night.

This paper introduces an assist system for the blind.It utilizes ultrasonic to measure the distance and speed.Then the distance signal is converted to position of slip block and the speed signal is converted to tone.The main function of this sytem is to assist the blind to determine distance and speed of objects.It is practical,Simple and inexpensive.

Objective To explore the epidemiological features of the metabolic syndrome in a cohort study of Xiangtan Mengkuang in China.Methods The prevalence rate,means and standard deviation of various risk factors associated with metabolic syndrome were analysed on the basis of base-line survey of risk factors of 5792 subjects(aged 25 years-old～) in 2004.Results (1)The prevalence rate of metabolic syndrome was 12.9%(12.4% in males,and 13.7% in females,P

A buofulm reactor ( BFR ) was fabrucated vua a cultuvatuon process usung naturally occurrung mucrobual seeds from locally collected wastewaters, and a serues of researches were carrued out wuth thus BFR based onlune Buochemucal Oxygen Demand ( BOD) monutor. The results showed that the BFR cultuvatuon tume was less than 14 h, and the buodegradatuon effucuencues was 18. 5%. The munumum detectuon lumut was 0. 5 mg/L, as well as the upper detectuon lumut was 20 mg/L. The relatuve error and relatuve standard devuatuon un accuracy and long term stabuluty to standard were -0. 8% and ±3. 2%, respectuvely. The real sample determunatuons showed an average relatuve error of +5. 6% to conventuonal BOD5 method. The BFR mauntauned a good performance un long term stabuluty and accuracy durung thus test peruod, and the broad lunear range ensured the demand for surface water onlune monutorung.

Ultrasonic estimation of fetal weight is important in the management o f labor and delivery. Lots of charts and formulas have been put forward in virtu e of regression methods. Artificial neural network, a kind of computer artificia l intelligence technology, can simulate human thinking based on neural structure and physiology. With the excellence in complex and non-linear information proce ssing, artificial neural network is fitter for the forecasting of fetal weight t han traditional regression methods.

Objective To develop an overall health risk model and to evaluate its convergent validity and reliability.Methods Health examination results of 230 adults from a public institution were collected by using Chinese Health Risk Appraisal Questionnaire V1.0 (CHRAQ V1.0).An CHRAQ V1.0-based overall health risk model was then developed,which included 34 items.Kolmogorov-Smirnov was used to test normal distribution of the data.Pearson correlation coefficient and Spearman correlation coefficient were used to evaluate parallel validity of the model.Crane Bach coefficient,Spearman-Brown coefficient and test-retest reliability were calculated to evaluated the reliability of the model.Results In this study,212 valid questionnaires (92.17％) were received.The average score of the newly developed overall health risk model was 41.96 ± 9.69,and its kurtosis coefficient and coefficient of skewness were 2.105 and 0.862,respectively.In Kolmogorov-Smirnov,the data were normally distributed (Z =1.073,P =0.199).The correlation coefficient of positive rate of all objective examinations with model scores was 0.774 (P ＜ 0.05).The Cronbach's alpha coefficient,Spearman-Brown coefficient and test-retest reliability of the model were 0.652,0.784 and 0.841,respectively (P ＜ 0.05).Conclusion In this investigation,our newly developed overall health risk model shows good validity and reliability and application prospect in the field of health management.