Syringe Guide: Safely Removing Air for Accurate Measurement

There are a few different parts of the syringe that you should be familiar with before you attempt to use one. The needle is used to extract medication from a vial and then to inject it into a person. The barrel is the part of the syringe that the medication goes into and the plunger controls the direction of the medication. To extract liquid, you pull the plunger of the syringe away from the barrel. To inject, push it toward the barrel. Before you can use the syringe for an injection, you must remove any air bubbles.

Instructions

• 1

  Turn the filled syringe upside down. The needle should now be pointing upward with the plunger facing the ground.

• 2

  Pull the plunger downward very slowly until a small empty space can be seen within the barrel of the syringe just below the needle.

• 3

  Flick the barrel of the syringe with your fingers. This causes all air inside the syringe to rise upward.

• 4

  Push the plunger upward now a little faster than before. Once a small amount of medicine squirts out of the needle, the air should be removed.