Objectives:To establish a method of electric power detection and to evaluate its performance for ultrasonic harmonic scalpel(UHS).Methods:We defined maximum electric power(Pmax),static electric power(Pg) and spare power index(Pi) at first and worked-out reasonable procedure,then we designed available detecting-tools and determined the Pmax,Pg and Pi.Results:We detected 3 sets of UHS from domestic or overseas makers and acquired Pmax,Pg and Pi successfully.The results were stable,reproducible and positively correlated to ultrasonic power.Conclusions:The ultrasonic power of UHS is difficult to detect.By the experiment in this paper,detecting ultrasonic power can be replaced by detecting electric power.

A new design of gnathodynamometer with microcomputer is introduced in this paper.We de- scrib the detailed structure,circuits and programme of biting head,sample collecting and maintaining and A/D conversion.In addition,the characteristic of the probe made of PVDF membrane is also discussed.

This paper mainly introduced the manufacturing technique and circuit theory or a new type of constant-temperature heating device used in laboratory. The practical application shewed that it was a rather ideal laboratory device.

Objective To develop the darkroom(tent) needed for X-ray film developing in the field conditions.Methods Three layers of colored cloth in red,black and army green were used for light-proving.Methods as field tent was used to support ground and create space.Results Tested in comprehensive field medical support drilling,this tent could develop film in 10 minutes despite the high temperature in the tent.The result was accepted by doctors.Conclusion It is waterproof,windproof and lightproof,and can develop satisfactory films in practical drill.

The basic principles and methods of information classification and encoding, as well as the present situation of classification of medical consumable materials, are introduced. By adopting multi-stage classification and encoding structure to information of medical consumable materials, the classification and encoding become more scientific, flexible and practical, which avails the informational management of medical consumable materials.

Objective To research a computer assisted 3D puncture system. Methods The system drew lessons from the method of CAS. MITK and the frame of X-knife were used to design the machine arm independently. Result The system came to the designing standard by experiments. Conclusion The clinical demanded product is developed with lower price in shorter time by integrating the mature techniques.

The instance reality of medial equipment combined with the center problem of standardization management on medical equipment stock to discuss the questions of how to manage and what about manage.According to correlated management demand and the fact of medical procurement,from the point of view on frame construction flow to the problem of elementary demand on medical equipment procurement,the stock process of medical instrument,the stock process of medical consumable and the management of purchase invoice etc were analyzed.The beneficial research reference can be provided by the daily management jobs of stock and maintenance,the management question of more refinement and general standardization.

The general principles on maintenance and management of technical specification are discussed. Through summarizing many years maintenance experiences of the hospital or medical institutions technical support department, the beneficial mentalities and referential experiences are provided by standardized and effective management on maintenance of medical equipment, according to the medical technology level of medical equipment management department, the economic efficiency, the size of medical equipment, the quality of maintenance technicians, and service ability as well as the management methods of medical equipment material.

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.

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.