Objective To provide precise data of encephalic pressure of the patients with higher encephalic pressure.Methods Through a hole bored in the proper position on the top of skull,a 1mm vessel,full of physiological saline,was inserted into the ventricle,whose outside was connected with the sensor through a 3-way stop cock.The sensor transformed the pressure into electrical signals and transmitted them to micro-computer C8051F020 for data processing.The value of pressure was then displayed on the LCD.Results Real-time and precise detection could be acquired by this intracranial pressure gage.Conclusion The digital intracranial pressure gage is easy-to-operate,simple and portable.

Objective To discuss how to improve the management and using efficiency of first-aid equipment.Methods The scientific management of hospital first-aid equipment was discussed in such aspects as administrator,duty,equipment,metrology and personnel.Results The management level and using efficiency of hospital first-aid equipment were greatly improved.Conclusion The method improves the first-aid and synthesis capability.

To make biomedical engineer comprehend deeply the cleaning and disinfection method of hemodialysis equipment,this paper discusses two factors determining cleaning and disinfection method,analyzes the impurities infecting dialysis' quality and treatment effect in hemodialysis system,and systematically introduces the daily cleaning and disinfection of hemodialysis equipment as well as its notice by citing Gambro AK95 series hemodialysis equipment.

88 patients with advanced schistosomiasis japonica complicated with hepatitis B, which was confirmed by positive HBsAg and/or HBcAg in liver with double perioxidase-anti-perioxidase (PAP) method, were analyzed clinically and pathologically. It was found that there were four pathological types in the livers of these patientss simple schistosomial liver fibrosis (SSLF, 16.3%), SSLF complicated with chronic hepatitis (18.2%), SSLF complicated with inactive cirrhosis (29.6%) and SSLF complicated with active cirrhosis(38.6%). Among the 88 patients, 43(48.9%) cases had no clinical manifestation associated with the damage of liver function and only 23(26.1%) cases had the history of acute hepatitis. The relationship between clinical manifestations and liver pathological changes was also discussed.

The function of spontaneous T suppressor cell (STs) of peripheral blood was detected in 17 patients with acute schistosomiasis japonica, 14 cases with chronic schistosomiasis and 25 patients with advanced schistosomiasis. The subset of T cell were simultaneously phenotyped in all cases except 10 patients with advanced schistosomiasis. Among the patients with acute schistosomiasis the rates of OKT3 + (pan T cell), OKT4+ (helper T cell) and OKT8 + (suppressor/cytotoxic T cell) were all significantly increased, and the function of STs was normal. In chronic and advanced schistosomiasis, the rate of OKT8 + T cell was raised, the rate of OKT3+ T cell and ratio of OKT4+/OKT8+ were statistically reduced, and the function of STs was significantly increased. The rate of OKT8+ T cell was negatively correlated with the function of STs in acute schistosomiasis, whereas in chronic and advanced rchistosomiasis, the rate of OKT8 + T cell had significant positive correlation with STs function while OKT4 +/OKT8 + had significant negative correlation with this function. The results indicate that the cellular immune response is increased in patients with acute schistosomiasis and down regulated in patients with chronic and advanced schistosomiasis. The function of T suppressor cell and the subset of T cell may play an important role in the immunoregulation of patients with schistosomiasis japonica.

Objective To develop a new optometer controlled by micro-computer.Methods With AT89C51 single-chip as hardware and programmed by C language,the instrument applied,the optometer adopted LCD and international standard optotype.The optotype had 14 lines of object-finders,and only one line of random characters was displayed on the screen every time.The optometry distance was 3m.All procedures were controlled by singlechip.Results The case of memorizing eye-chart was avoided and the optometry was every simple.Conclusion The instrument eliminates mirror used for optometry short distance,and the optometry results can be stored and printed.It also has the merits of small volume,precise manufacture,simple operation,low cost and AC/DC power supply.

Objective To discuss the principle and clinical application of microcomputer optometer.Methods The optometer is composed of singlechip,handle and LCD.The eyesight is examined by selecting exposure of random sample eye-chart mark 'E' within direction keys on the handle.Results The optometer has the merits of simple manipulation,exact result,small cubage,AC/DC power supply and so on.Besides,it prevents the testee from remembering eye-chart.Conclusion The optometer can be extensively used in hospital,school,every work unit or even family.

Objective To introduce the display principle and clinical application of PET-CT. Methods The display principle of PET-CT was analyzed. Results The status of tissue or organ were showed by using PET in the form of dissection images and the relative physiological parameters. Advanced CT technology exactly locates and indicates anatomic and functional information of target tissue or organ. Conclusion In combination of PET and CT, PET-CT show high value in clinical application.

The principle and safety of radio knife are discussed. Personnel safety and the safe operation of the equipment are expounded based on the principle and structure of radio knife. Strict abidance by operation regulations is essential to guarantee the safety of patients, operator and equipment.

Based on abundant experiences on circuit servicing of medical equipment in frontier defending military units,this paper discusses the significance of military medical equipment third-class servicing station again and provides solutions to some problems in work.