Full
Outline
To design a local negative pressure isolation protection system on sickbed for infectious patients and conduct experimental research on its performance to analyze and evaluate the reliability and safety of its isolation protection against biological aerosol.
A local negative pressure isolation protection system on sickbed was designed with consideration to the structural type and materials. Then, the system was tested in terms of subjects′ experience, static and dynamic pressure difference, and noise. Particularly, the isolation protection performance of this system against biological aerosol in micro-circumstance airtight cabin was tested.
The local negative pressure isolation protection system on sickbed quickly established a stable local negative pressure difference within 1 min, with a maximum fluctuation error of 4.6%. The average noise under the maximum air volume was 64.2 dB(A). When Serratia marcescens aerosol with a maximum concentration of 1.4 × 1011 CFU/mL was atomized inside the isolation hood, the aerosol leakage rate outside the hood was 0, which showed that the local negative pressure isolation protection system on sickbed could effectively cut off the transmission of pathogenic microorganisms in the air. Moreover, the subjects had a good subjective experience.
The designed local negative pressure isolation protection system on sickbed is comfortable, lightweight, and portable, which can be used to reduce the risk of microbial spread among respiratory patients.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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