Liquid bacterial interception experiment method as well as liquid bacterial interception experiment system-air filter with normal pore diameter of 0.2 [m]um

Abstract

The invention relates to a liquid bacterial interception experiment method as well as a liquid bacterial interception experiment system-air filter with normal pore diameter of 0.2 [mu]m. The liquid bacterial interception experiment system-air filter with normal pore diameter of 0.2 [mu]m comprises a constant-pressure tank; the top of the constant-pressure tank is communicated with a gas outlet ofa gas pump through a gas inlet pipe; a pressure gauge is arranged on the constant-pressure tank; the constant-pressure tank is filled with challenge bacterial liquid; the constant-pressure tank is communicated with the inlet of the tested air filter with normal pore diameter of 0.2 [mu]m; the air filter with normal pore diameter of 0.2 [mu]m is positioned in a percolate collecting bottle; a flow valve is arranged on a liquid outlet pipe; the inlet of the liquid outlet pipe is positioned at the bottom of the constant-pressure tank. The liquid bacterial interception experiment system-air filterwith normal pore diameter of 0.2 [mu]m has the following advantages: the filtering effect of the to-be-tested air filter with normal pore diameter of 0.2 [mu]m under the worst condition can be tested,the system can help people to evaluate the bacterial interception ability of the air filter, and the rigorous use requirements of medical equipment such as a transfusion device and a blood transfusion device can be met.

Description

technical field [0001] The invention relates to a liquid bacterial interception test system and method of a medical air filter, in particular to a liquid bacterial interception test method and system - an air filter with a nominal pore size of 0.2 μm. Background technique [0002] At present, there are several methods for evaluating the retention capacity of gas filters, mainly including liquid bacterial retention test, aerosol bacterial retention test and aerosol virus retention test, etc. The liquid bacterial interception test is to pre-wet the hydrophobic filter membrane with a low surface tension liquid, and then refer to the bacterial interception test method of the sterile-grade liquid filter / membrane, using a diameter of about 0.3μm ~ 0.4μm, long The bacterial suspension of Brevundimonas diminuta (ATCC 19146) with a diameter of about 0.6 μm ~ 1.0 μm was challenged. Correspondingly, with reference to liquid sterilization and filtration, most manufacturers currently la...

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Problems solved by technology

Due to the different filtration mechanisms, the liquid precision of the filter is lower than that of the gas. It has been proved that the filter that can intercept phage / virus in the aerosol challenge can not intercept the phage / virus in the liquid challenge.

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