ABSTRACT
Objective To improve the oxygen concentrator in the medical gas pipeline system according to standard YY 1468-2016 Oxygen concentrator air supply system for medical gas pipeline system.Methods Standard YY 1468-2016 about to be implemented was analyzed based on standard YY/T 0298-1998 Medical molecular sieve oxygen generator general technical specification.Management measures were proposed for the oxygen concentrator according to standard YY 1468-2016.Results The oxygen concentrator in the medical gas pipeline system was optimized so that the requirements of compulsory standards were met.Conclusion The oxygen concentrator in the medical gas pipeline system has to be enhanced in running,supervision and management to meet the requirements of the new standard.
ABSTRACT
Objective To develop a N95 filter device for medical gas terminal to remove bacteria,viruses,particles and impurities from medical gas so as to purify medical gas to sterile grade.Methos The device was composed of a filter element and a shell,and the two parts were gifted with cylindrical shape to enlarge filtration area and reduce airflow resistance.The filter element had its length being 110 mm and diameter being 40 mm,and was composed of a tubular plastic frame and high-performance N95 filter cotton with high filtration rate.The top of the filter element was fixed to the inlet end of the device,and the bottom was fastened to the outlet end by splicing.The device with a total length of 150 mm had its shell and joint made of plastics,and was 110-mm long at the inlet end and 60-mm long at the outlet end.The outside diameter of the device was 60 mm,the connection thread at the middle of the device was 20-mm long,and the cones at the two ends had a 30-mm diameter.The joints at the ends had their sizes being 5 mm according to industrial standard,which were used to connect the device with the oxygen tube.Results The device had the filtration rate being higher than 99.9％ for both particle filtration efficiency and bacterial filtration efficiency,and the desired requirements were met.Conclusion The device gains advantages when filtering bacteria,virus and particles,and thus is worthy promoting clinically.
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Objective To investigate the feasibility and stability of medical gas suction feeding device for copying the model of respiratory failure in dogs. Methods The self-designed medical gas suction feeding device was used to establish the model of respiratory failure in dogs. After regulating the proportion of oxygen (O2), carbon dioxide (CO2) and nitrogen (N2), the fraction of inspiration O2 (FiO2) was decreased, while the forced inspiratory carbon dioxide (FiCO2) was increased. At the same time, the breathing out pathway was open to make the arterial oxygen partial pressure p (O2) and arterial blood carbon dioxide partial pressure p (CO2) reached and stabilized in a stable condition. The arterial blood samples between default state and 1 hour, 2 hour after modeling were collected to detect the blood gas index. Results One hour after the establishment of model, the p (O2) was≤60 mmHg (1 mmHg=0.133 kPa), and p (CO2) was≥50 mmHg (1 mmHg=0.133 kPa), which suggested that the dog model of respiratory failure was established successfully. Compared with the basic state, data of pH, oxygen content, oxygen saturation (SaO2) and residual alkali (BE) were decreased at 1 hour and 2 hour after modeling (P 0.05). Conclusion Under the regulation of the medical gas suction feeding device, the respiratory failure state of large experimental animals is successfully established.
ABSTRACT
Objective To realize unifying gas source adapter's standards for different medical gas use equipment while the one be connected to different terminal units of central gas source, and terminal's pressure control of the medical gas pipe network, and medical gas uninterrupted supply for partial department in hospital. Methods A general fast adapter for terminal units of medical gas use equipment and central gas source was designed and developed, and its operation methods were explained. It was used and connected into different terminal units for unified format and universality. Results It was convenient and effective in the clinical application in clinical test. Conclusion The general fast adapter is simply manufactured, and achieves the resources shared of the medical gas use equipment. It has good perspective for clinical surgery applying.