What is the best practice when pouring a sterile liquid?

When pouring a sterile liquid, the best practice is to discard the first small amount of liquid, often referred to as "wasting" the initial portion. This step is vital because it helps to wash away potential microorganisms or contaminants that may have accumulated at the lip of the container. The first few drops can be contaminated during the opening of the container or from handling, which could compromise the sterility of the liquid being poured.

By discarding this initial amount, you ensure that the liquid you pour onto your sterile field or instruments is as free from contaminants as possible, which is crucial in maintaining infection control standards. This practice helps safeguard against introducing pathogens and is an important aspect of aseptic technique in healthcare and laboratory settings.