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    • 5. 发明授权
    • Ostomy bag with multi-stage filter
    • 造型袋与多级过滤器
    • US5643234A
    • 1997-07-01
    • US382475
    • 1995-02-01
    • Marc Lesko
    • Marc Lesko
    • A61F5/441A61F5/44
    • A61F5/441
    • The ostomy bag includes a multi-stage filter system that provides contamination protection for a deodorizing filter in the system. The multi-stage filter system also includes protection elements that are impassable to semi-liquid waste material but permit passage of gaseous waste. The protection elements are located such that gaseous waste must pass through the protection elements before it passes through the deodorizing filter. In one embodiment of the invention, the protection elements include a fluid and gas-impermeable cover layer with fluid bypass ports. The fluid and gas-impermeable cover layer is followed by a barrier filter that restricts passage of semi-liquid waste material. The barrier filter is followed by a liquid-impermeable membrane that prevents passage of liquid. The liquid-impermeable membrane is followed by a moisture-absorbent pad that is adjacent the deodorizing filter. The moisture-absorbent pad absorbs moisture condensate that may progress as vapor through the liquid-impermeable membrane. Thus semi-liquid waste cannot contact the deodorizing filter, since it cannot bypass the protection elements to reach the deodorizing filter.
    • 造口袋包括一个多级过滤系统,为系统中的除臭过滤器提供污染防护。 多级过滤器系统还包括不可渗入半液体废料但允许气态废物通过的保护元件。 保护元件被定位成使得气体废物在其通过除臭过滤器之前必须通过保护元件。 在本发明的一个实施例中,保护元件包括具有流体旁路端口的流体和气体不可渗透的覆盖层。 流体和气体不可渗透的覆盖层之后是限制半液体废料通过的阻隔过滤器。 屏障过滤器之后是防止液体通过的液体不可渗透的膜。 液体不可渗透膜之后是与除臭过滤器相邻的吸湿垫。 吸湿垫吸收可能通过不透液膜的蒸气进入的水分冷凝物。 因此,半液体废物不能接触除臭过滤器,因为它不能绕过保护元件到达除臭过滤器。