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Objective To survey bacterium pollution state on the surface of medical equipment maintenance tools,and thenobserve the disinfection effect of ozone.Methods Totally 30 medical equipment maintenance tools including screwdriver,hexagona wrench and multimeter from certain hospital were placed in ozone disinfection cabinet,and then disinfected by ozoneup to 5 minutes.Samples on the surface of tools were collected by cotton swabs before and after disinfection,cultured for 48hours in 37 ℃,and then the bacterial colony counts were measured and analyzed,and pathogenicity bacteria were identified.The pollution couditions on kinds of tools were compared.Results The surface of the tools was polluted severely,bacterialcolony counts of which before disinfection reached (132.68±37.02) cfu/cm2,and decreased to (6.44±1.08) cfu/cm2 after 5-minutes' disinfecting.There was statistically significant difference in the bacterial counts before and after the disinfection (P＜0.01),and the inactivation ratio was up to 95.15％.Pathogenicity bacteria such as staphylococcus aureus and escherichia coliwere detected before the disinfection,and killed after that.The bacteria counts were significantly different in the three kindsof tools,and the screwdriver gained the highest count while the multimeter had the lowest one.Conclusion The surface ofmedical equipment maintenance tools is polluted by bacteria severely,including some pathogenicity bacteria,and should be disinfected regularly.Ozone can kill bacteria rapidly,and the tools can achieve sanitary standard after 5-minutes' ozone disinfecting.
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Objective:To used the internationally accepted methods of CT quality assurance for testing their quality, to maintain the normal operation of CT scanner and guarantee the quality of photographic image.Methods: Toshiba Activion 16 row CT, set the scanning conditions: tube voltage 120 kv, 310 mas exposure, scan time is 0.33 s, scanning layer thickness: 10 mm, 5 mm, 1.5 mm, view(FOV) 150 mm×150 mm, 512 x 512 reconstruction matrix. We measured the following performance parameters for CT spatial resolution, low contrast resolution,uniformity and noise with Catphan500 phantom made by the phantom laboratory of U.S.A.Results: The spatial resolution, low contrast resolution, uniformity and noise of the CT are all in line with the requirements. Obtained by detecting the X-ray dose, pixel, the thickness of the above parameters are affected, but also the interaction between the above parameters simultaneously.Conclusion: By detecting the spatial resolution, low contrast resolution of medical image, we can effectively guarantee system performance, maintaining optimal image quality.
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Objective: To design a heart rate testing procedure which based on Labview. Methods:Collect the blood oxygen signals of the fingers, which keep in step with the pulse wave. Filter the signals and obtain the pregnant datum by the Labview procedures. Results: Achieve the pulse cycle“T”by Labview processing the blood oxygen signals of the fingers, and gain the heart rate by calculating the pulse in one minute(Pulse is equal to the number of heart beat in one minutes-1/T,the heart rate). Conclusion:It is an important and meaningful work to process the signals. Not only acquire the heart rate, but also prompt and diagnose the diseases of the cardiovascular system. It also can provide some meaningful diagnostic evidence.
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OBJECTIVE:To establish a fast,accurate,programmed and automatic mode for the statistical analysis of drug in-formation data so as to achieve the compatibility and the switching among multiple forms and the sharing of data information. METHODS:Common Excel commands and functions as well as their use methods were introduced and analyzed combined with drug information statistics cases. RESULTS & CONCLUSIONS:By taking steps such as exporting raw data,designing drug infor-mation sheets and summarizing drug raw data with the pivot table,the data of the drugs purchased by the hospital in a manner of centralized bidding and national essential drugs purchased can be calculated on the basis of different periods of time to fast and accu-rately search for drug data,facilitate data induction and processing and shorten statistics cycle. The above-mentioned steps are well applicable,easy to master,efficient and fast,reliable in the check of results and data,and suitable for the statistics for hospital drug information and other fields.
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Objective:According to the theory of Traditional Chinese Medicine pulse diagnosis, we have used a PVDF pulse sensors and a combination of pre-amplifier unit to accurately detect the pulse information.Methods: Based on the principle of electronic technology design a multi-level amplification and filtering circuitry for detecting the pulse signal condition. Design the data acquisition circuit based on AT89C51 microcontroller and analog-digital conversion chip AD0809.Results: Using the signal acquisition and data amplifier circuit to effectively collect, process and amplify the pulse wave, will integrally combine the traditional Chinese medicine theory and modern scientific theories, greatly reduce the misdiagnosis rate, then effectively achieve the objective of pulse diagnosis.Conclusion: The data acquisition circuit which based on AT89C51 single-chip microcomputer and A/D conversion chip AD0809 can basically complete the pulse signal collection and processing, the signal amplification is more noticeable, which has A certain role in promoting to reveal the objective.
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Objective: To solve the problem, that the high-cost consumables exists many management blind spots and shortcomings, under the traditional medical high-cost consumables purchase management mode. Methods:Combined with the characteristics of medical high-cost consumables, design a new high-cost consumables purchase management mode. Based on theArmy No.1high-cost consumables management system, using bar code technology, to realize the full closed tracking management of medical high-cost consumables. Results:Realized the unified control of the whole hospital medical high-cost consumables, timely and accurately mastered the material purchase, storage and usage, and to realize the object of the high-cost medical material management and safe usage. Conclusion:The scheme is feasible, and solve many problems, those are high-cost consumables management denominated in error, cost volatility and unseasonal financial processes and so on. It can become the effective means of hospital high-cost consumables management.
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Objective:To discuss the effect of the choice of brain functional MRI parameter on image quality. Methods:To select nine young volunteers for scanning brain functional MRI from February to December, 2012, and analyze the effect caused by parameters to the image quality. Results:The lower of the b value, the more level 1 image, the less level 3 image;the more of the number of diffusion sensitive gradient direction, the more level 1 image, the less level 3 image. The largest impact on image quality is the interlayer spacing, the number of diffusion sensitive gradient direction and the b value. Conclusion:The factors influencing the quality of brain functional MRI images including the interlayer spacing, the number of diffusion sensitive gradient direction and b value. In the parameter selection process, one should start from diagnostic purposes and weigh the pros and cons with overall consideration.
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Objective:Based on the matrix laboratory (MATLAB) design and implementation of the digital image processing system, to achieve the goal of medical image information. Methods: To use MATLAB software to develop a design and implementation of the medical digital image processing system. Results:This paper presents a kind of digital image processing system based on MATLAB, including all aspects of the image processing. Conclusion:Through the research of medical image processing system, medical imaging for important information can be obtained.
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Objective: To cool down the implementation of field training injury cold and heat function of electric control part. Methods:To design of peripheral control circuit, the use of STM32 microcontroller software compiled program, temperature control function of the whole device. Results: Though the program running, it realized the function of temperature control device. Conclusion:STM32 MCU has powerful functions, low price, simple use, convenient development advantages, suitable for use in other medical equipment electrical control part.