title: [Study on the performances of the positive pressure powered air-filter protective hood].
abstract: The positive pressure powered air-filter protective hood can prevent physicians and nurses from being infected by serious respiratory infections. The contaminated air is filtered by the high efficiency specific air-filter (HESA) and then transported into the hood by a blower to form about 140 +/- 10 Pa positive pressure environment, which makes the air in hood overflow out from the lower part of the hood, by which carbon dioxide and vapor can be removed, and excreted. The HESA's filters of simulative virus up to 99.9999% with the structure of double layers filtering. With going at 4 km/h pace on a walking vehicle wearing the hood, the testees' heart rate is 90-105/min oxygen saturation of the blood(SPO2) is 97%-98%. When the air flow is from 75 L/min to 125 L/min, this can meet the testees' physiological demand under heavy workload. Clinical trial results show that the hood can effectively protect the physicians and nurses from infection.
authors.affiliation: Institute of Medical Equipment, Academy of Military Medical Sciences, Tianjin 300161, China. tianfeng56754@eyou.com
authors.forename: Feng
authors.initials: F
authors.lastname: Tian
authors.forename: Zheng
authors.initials: Z
authors.lastname: Wang
authors.forename: Jingquan
authors.initials: J
authors.lastname: Yang
authors.forename: Jian
authors.initials: J
authors.lastname: Yang
authors.forename: Shenjun
authors.initials: S
authors.lastname: Liu
authors.forename: Yanjun
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D000328:Adult; D004867:Equipment Design; D005260:Female; D005374:Filtration / Q000295:instrumentation; D006801:Humans; D008297:Male; D008875:Middle Aged; D012134:Respiratory Protective Devices