Objective:To investigate the responsibility transformation of hemodialysis engineer with the popularization of hemodialysis therapy. Methods:Through long clinical practice and exploration the responsibility of hemodialysis engineer in the new environment by working closely with senior engineer and nurse which leaded the cooperation between manufacturers and department of equipment in hospital. Results: According to the discussion and practice demonstration, the responsibility of hemodialysis engineer is no longer corrective maintenance, but to put more attention to preventive maintenance and quality control, even to improvement maintenance to service clinical. Conclusion:With the quality improvement and new idea which the management model focuses on patients, hemodialysis engineer will strengthen the quarlity control and improve the maintenance, provide better service for clinical work.

Objective:To design automatic reverse osmosis water system with new design idea of reverse osmosis water system, to make sure of the procedure. Methods:During the design, using microcomputer technology to control water preparation and disinfection. Results:Using MCU to control preparation of water and disinfection, in order to monitor water quality. If water quality exceeds the standard, the system will alarm and generate records. Conclusion: Using microcomputer technology to design Reverse osmosis water system, not only reducing artificial, but also to improve the safety and controllability, even the quality control of reverse osmosis water system.

OBJECTIVE:To optimize the toxicity attenuation processing technology of Amorphophallus sinensis Belval.. METH-ODS:With the overall score of taste stimulation and rabbit eye irritation of A. sinensis Belval. as the index,and based on the sin-gle factor method,orthogonal test was designed to investigate the the influences of the amount of saturated calcium hydroxide solu-tion,heating time and heating temperature on the processing effect,and verification tests as well as irratation comparison before and after processing were conducted. RESULTS:The amount of saturated calcium hydroxide solution and heating temperature had significant influence on the processing effect. The optimal processing technology was to add saturated calcium hydroxide solution 30 times as much as the amount of medicinal materials at 100 ℃ and heat it for 30 min. The verification tests showed overall scores of 8.05,8.44 and 8.37(RSD=2.5%,n=3). The average overall scores before and after processing were 0.12 and 8.54(n=10)re-spectively. CONCLUSIONS:The medicinal materials processed by the optimal technology have lower stimulation and irritation. The optimal technology is stable and reliable.