Test method of contact wound dressing: antibacterial property
Source：本站 Time：2021/4/29 9:28:17 frequency：
Both sides of the dressing are not wet. In the dressing in this state, there is no exudate or very small amount of exudate on the wound surface, and the outer surface of the dressing is in a dry state.
Note: If the dressing does not claim to block water, it is deemed that the outer surface is in a dry state.
Semi wet condition
One side of the dressing is wet. In the dressing in this state, there is exudate on the wound surface, while the outer surface of the dressing is in a dry state, that is, "dry outside and wet on the inside"; or, there is no exudate or very small amount of exudate on the wound surface, and the outer surface of the dressing is expected to be Being in a damp state, that is, "wet outside and dry inside".
Note: If the dressing does not claim to block water, the outer surface is deemed to be in a dry state; if the dressing claims to block water, the outer surface is deemed to be in a wet state.
Wet condition
Both sides of the dressing are wet. In the dressing in this state, there is exudate from the wound surface, and the outer surface of the dressing is expected to be in a wet state.
Note: If the dressing claims to block water, it is considered that the outer surface is in a wet state.
Dry antibacterial test device: the challenge room is used for holding challenge inoculum, and the sampling room is used for wiping sampling. Before the test, use the confirmed sterilization procedure to sterilize the test device for use.
Semi-wet state (outer dry and inner wet) antibacterial test device: the challenge chamber is used to hold the challenge inoculum, and the sampling chamber is used to hold the nutrient broth medium. Before the test, use the confirmed sterilization procedure to sterilize the test device for use.
Semi-wet state (wet outside and dry inside) antibacterial test device: the challenge chamber is used to hold the challenge bacteria liquid, and the sampling chamber is used for wiping sampling. Before the test, use the confirmed sterilization procedure to sterilize the test device for use.
LFY-721 Bacterial barrier test device is used to evaluate the bacterial barrier properties of contact wound dressings with bacterial barrier performance. It can be tested in four methods: dry bacterial barrier properties, semi-wet (outer dry and inner wet) bacterial barrier properties, semi-wet (outer wet inner dry) bacterial barrier properties, and wet bacterial barrier properties.Meet the standard YY/T 0471.5-2017Test methods for primary wound dressings一Part 5:Bacterial barrier properties.