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. 2012 Jan;46(1):67-9.

[Evaluation of the protective performance of a positive pressure bio-protective clothing against viral aerosol]

[Article in Chinese]
Affiliations
  • PMID: 22490144

[Evaluation of the protective performance of a positive pressure bio-protective clothing against viral aerosol]

[Article in Chinese]
Na Li et al. Zhonghua Yu Fang Yi Xue Za Zhi. 2012 Jan.

Abstract

Objective: To evaluate the protective performance of a positive pressure bio-protective clothing against viral aerosol.

Methods: The suspension of indicating virus phage Phi-X174 was made for viral aerosol generating in a hermetic cabin. The diameter of viral aerosol particles were measured with a aerodynamics size analyzer. By adjusting the inner humidity of the cabin, the protective efficiency of the positive pressure bio-protective clothing against viral aerosol in high and low windshield conditions was determined with Andersen six-stage air sampler sampling and plage forming unit (PFU) counting, respectively.

Results: The mass median diameter of Phage Phi-X174 aerosol particles was about 0.922 µm and the background concentration is beyond 2 × 10⁴ particles/m³. The protective efficiency of the clothing against phage Phi-X174 aerosol particles was above 99.9% under different test conditions with the range of viral aerosol concentration between 0 - 23 PFU/m³. Airflow (P = 0.84), environment humidity conditions (P = 0.33) and sampling time (P = 0.07) did not affect the protective efficiency statistically.

Conclusion: The positive pressure bio-protective clothing provided a relatively high efficiency against phage Phi-X174 aerosol regardless of airflow rate, environment humidity and sampling time.

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