How is glass typically filtered from a solution in syringes?

The correct method for filtering glass from a solution in syringes is through the use of a 5 micron filter needle or straw. This approach is essential in compounding sterile preparations, particularly when there is a risk of particulate matter—like glass shards—from vials breaking during preparation or transfer.

A filter needle or straw is designed specifically for this purpose, featuring a filter that allows liquid to pass through while trapping larger particles, including glass. The 5 micron filter size is effective for capturing these potentially harmful contaminants, ensuring that the final solution is safe and suitable for patient administration.

Using a standard needle would not effectively filter out glass or other particulates since it lacks a filtration mechanism and simply creates an opening for fluid transfer. Allowing a solution to settle may help separate some particulates through sedimentation, but this method is unreliable and not practical for achieving sterile compounding standards. Additionally, stating that no filtration is required neglects the critical importance of maintaining sterility and safety in pharmaceutical preparations. The use of filter needles enhances the overall safety and quality of the medication being administered.