Effect of temperature and time on the detection of calcium and magnesium in urinary sample storage / 中国职业医学

OBJECTIVE: To investigate the effect of temperature and time on the detection results of calcium and magnesium in urinary sample storage. METHODS: Urinary samples of 5 health volunteers were collected. The samples were stored in room temperature, 4 ℃ and-20 ℃ for different duration after sealed separately. A flame atomic absorption spectrometry was used to detect calcium and magnesium mass concentrations in the urinary samples. RESULTS: The variation rate of calcium and magnesium mass concentrations was <2.00% when urinary samples were stored at room temperature for 8 hours, the variation rate was <6.00% when samples were stored at 4 ℃ for 15 days, and it was <5.00% when samples were stored at-20 ℃ for 60 days. CONCLUSION: The temperature and time of urinary sample storage can affect the detection results of calcium and magnesium mass concentrations. Packing and storing samples at low temperature after collection as soon as possible is beneficial to ensure the accuracy of test results.

Power interference and its restraining in ECG machine testing / 医疗卫生装备

Objective To analyze the power interference during ECG machine testing and to propose countermeasures.Methods Some measures in power supply stability, shielding, grounding and wire winding were carried out to reduce the influences of 50 Hz interference on ECG machine testing.Results The influences of the power interference were reduced greatly on ECG machine.Concluslon The performances of ECG machine can be ensured by restraining the power interference.

The construction of information management module of emergency medical rescue materials / 医学研究生学报

According to the problems and requirements in the management of emergency materials , a new approach to estab-lish the information management module of emergency medical rescue materials has been put forward to deal with the difficulties in the aspects of emergency medical rescue materials involving regular preparation , daily management , storage and transportation , emergency mobilization, sample grouping and portable maneuvering , and optimizing support.

Research on the potential problems and countermeasures of central gas supply in hospital / 中国医学装备

Objective: To supply the quality of hospital centers, conduct research and analysis, develop appropriate purification scheme. Methods: According to the specific hospital ward equipment used and production center with the use of state gas sampling filter device;through the device each ward of the hospital wards with a central gas sampling equipment, comparison and analysis. Results:through the filter sampling, analysis of equipment with a gas composition of trace impurities, impurities resulting inferred parts, the first time to get in touch with the manufacturers to jointly negotiate improvement programs. Conclusion:Hospital Center survey analysis is a gas quality monitoring and promotion of the development, the need to promote open each hospital to develop a central supply more complete safety indicators. Such a center gas quality testing program can be more effective in protecting the quality of gas supply, more conducive to clinical treatment and use.

Design and manufacture of medical shipping refrigerated box / 中国医疗器械杂志

<p><b>OBJECTIVE</b>To develop a set of low temperature medical shipping refrigerated box for storage and shipping for biologicals in field environment.</p><p><b>METHODS</b>Semiconductor cooling device (SCD) and phase change energy storage materials (PCESM) were adopted as the means for refrigeration and coolness storage, coolness was produced by SCD and stored by PCESM while power source present, and low temperature state for biologicals was keep by PCESM.</p><p><b>RESULTS</b>The problem for biologicals storage and shipping in low temperature state for medical experiment and clinic was resolved.</p><p><b>CONCLUSION</b>Medical shipping refrigerated box can be used not only in medical, but also in other field such as food storage and shipping, etc.</p>

The design and configuration of integrated multifunctional first-aid apparatus box / 中国医疗器械杂志

With clinical first-aid needs, it is necessary to develop and produce combined first-aid equipment box to meet needs of the battlefield and emergency treatment. The choice of medical devices should also be followed to change, so as to well realize the scene first aid and portable purpose, whose internal configuration of medical devices can also be set according to actual requirements and have met a case of multiple uses, to suit different applications require medical treatment.

Study on Curing Time Controlling of Materials Based on Isocyanate and Its Application in Transmitting Apparatus for the Wounded / 医疗卫生装备

Obiective To study controUing method for curing time of the materials based on isocyanate, and perfect making means and operating rules of transmitting apparatus for the wounded, Methods According to the controlling principles of the rate of chemical reaction, the influencing factors' were studied such as catalyzer, ambient temperature, mixture level of materials and materials volume by experiment. Results By the results of experiments, ambient temperature hasn't an effector impact on eufing time of isocyanate, catalyzer and mixture level of materials only have a little effect or impact on initial reaction time, but materials volume is an important factor of all. Conclusion By the means of experiments, the curing time of isocyanate is only influenced by the volume of materials, and the character is very useful to transmitting apparatus for the wounded in field battle or on-site emergency rescue.

Design of 50Hz notch filter based on MATLAB / 医疗卫生装备

50Hz power frequency interference is the main noise of ECG signal.With the signal processing toolbox of MATLAB,this paper develops a high-performance 50Hz notch filter.The design method is relatively simple compared with other methods and the application result verifies its efficiency.

Study on independent component analysis for epilepsy electroencephalogram / 医学研究生学报

Objective: Scanning the latent epileptic under the technology of independed component analysis(ICA),finding the patients and intervening in course of diseases earlier,reducing the degree of implicating and the ratio of disability or dead.Methods:Establishing ICA mathematic model,Sampling 16 channels standard EEG using the instrument developed by ourself,and processing the data using Fast ICA algorithm.Results:Separating,recognizing epileptic waveform,and diagnosing epilepsy by the results,and reversed transforming the epileptic waveform into 16 channels EEG space and locating the epileptic focus using some locating software.Conclusion:Scanning epilepsy under ICA,not only reducing signals recognizing workload,but also increasing its efficiency,and makes it possibe to scan epilepsy;and the accuracy and efficiency of source location could be increased greatly by inverse ICA.

Establishment of medical instrument quality & safety management system / 医疗卫生装备

The development of medical technology and method more and more relies on medical engineering technology.This paper demonstrates the importance of quality management in medical engineering from many aspects,especially from the establishment of medical instrument quality and safety management system.

Design of centralized infusion managing and controlling system / 医疗卫生装备

This paper describes the structure, operating principles, design method of both software and hardware of a centralized controlling system of infusion pumps based on CAN bus. The system can monitor the status information and control the infusion parameters of many infusion pumps simultaneously. It provides a more complicated cliaical infusion treatment means, greatly eases the work burden on doctors and nurses, and promotes the effects of treatment and nursing.

Experimental study of ultrasound sensor based on fiber grating / 医疗卫生装备

Optic fiber-grating sensor has many unique advantages and is one of the widely-applied sensors in recent years. The response of FBG sensor to ultrasound was investigated. Results showed that the sensor output intensity was basically linear to the acoustic power. So the optic fiber-grating sensor can be applied to noninvasive detection of internal ultrasound.

The Research on the Analysis method of the Neuron-threshold Experiment / 医疗卫生装备

We got vary data about neuron-threshold from animal experiment. We try to find the disciplinarian from the data in order to confirm something. In this article we first confirmed unitary method of neuron-threshold; and then found t he complication working on the neuron-threshold parameter and the connection bet ween one another; at last proved the non-linear characteristic about neuron. The se conclusions do well to the clinic application of nerve electro-physiology; ne rve biology and neuron-threshold. Along with the experiment data enriched and co nsummated more and more, using analysis method for experiment, neuron-threshold will be up to par of clinic diagnosis and treatment.

Method for assessing bid of medical equipment based on BP neural network / 医疗卫生装备

This paper introduces the basic theory of BP neural network and develops a model for assessing bid of medical equipment based on BP neural network. A case is analyzed with the model, and the result shows the high accuracy of it.

Principle and clinical application of ultrasonic surgical installation / 医疗卫生装备

With the appearance and development of ultrasonic surgical installation, ultrasonic therapy enters on a new epoch. High-amplitude and high-power ultrasonic vibration produced during the operation, ultrasonic surgical installation can be used to decrease the amount of bleeding or stop bleeding according to the acoustic properties of different tissues. The part where pathological changes happen can be excised selectively by ultrasonic surgical installation. This article introduces the principle, structure, classification and clinical application of ultrasonic surgical installation in detail.

Preliminary research of epilepsy brain electricity based on SVM algorithm / 医疗卫生装备

Objective To select algorithm for noninvasive EEG screening of epilepsy patients with a view to early detection and reduction of the incidence of epilepsy,morbidity and mortality.Methods Electroencephalogram(EEG)signal characteristics of the normal and epilepsy wave were extracted,automatically identified and classified based on support vector machine(SVM) analysis with a view to achieving epilepsy automatic scale screening.Results The EEG characteristics energy displayed by the model between epilepsy patients and healthy people could be divided obviously.As a new machine learning methods,SVM had a strong ability to generalize.EEG signals based on the algorithm of the classification would become diagnosis of epilepsy patients misprision of a new viable avenue.Conclusion SVM is suitable for the limited samples(small samples).The spontaneous EEG classification with SVM can achieve better results,so it can be used to epileptic EEG abnormality screening.

Study on requirement forecasting of medical consumptive materials based on Kalman filter / 医疗卫生装备

An analysis method for requirement of medical consumptive materials on Kalman filter is put forward.An analysis mathematical model is established at first,its solution process is carried out at same time,and then an example using this solution is given according to the working practice.At last,the shortcomings using classical Kalman filter were discussed and a new method using adaptive Kalman filter was proposed.

Exploration on Management Technological Specification of Medical Equipment / 医疗卫生装备

Objective The diagnosis and treatment of modern hospital are greatly influenced by medical devices. With the widespread introduction of medical equipment, the scientific management how to carry on the instrument and appliance by the administrative department of hospital becomes an unavoidable problem. Methods Based on the definition of medical equipment, basic attributes and management skills, some key questions which the administrator should notice and solve in the scientific management are introduced, and gives out the principle and method. Results It is pointed out that scientific management can correctly guide the investment of equipment, and gain great benefit with a minimum input. Conclusion Investment according to the developmental strategy is proposed, which provides strong theoretical basis for leadership and administrative departments.

Discussion About Procurement Managerial Technique Standard for Medical Equipment Importation / 医疗卫生装备

Objective To discuss the procurement managerial technique standard for medical equipment importation.Methods The procurement managerial technique standard for medical equipment importation was studied from the aspects of flows for international bidding,declaration and operation as well as related specifications.Results The imported medical equipment according with the procurement managerial technique standard,gifted with a high cost performance,satisfied the requirements of the nation and the hospital.Conclusion The managerial technique standard can promote the procurement of imported medical equipment.

Discussion on Rule of Quality Managing Technology for Medical Apparatus & Equipment / 医疗卫生装备

Objective To research the quality management technique of medical device that as an important technique of medical engineering department in hospital is a guarantee of the hospital's development.Methods The definition,elements,signification and extension of management technique,elaborated the technique process and requirement of the quality control in hospital were introduced.Results Following an analysis of the quality control system and actualizing methods,perspective and current objective of the accident report system,legal and systemic quality management,as well as the role and responsibility of medical engineering practitioner were discussed.Conclusion The quality level of hospital will be fully improved depending on establishment of the quality management technique for medical device.