Syringe

What is a syringe?
A syringe is a pump consisting of a sliding plunger that fits tightly in a tube. The plunger can be pulled and pushed inside the precise cylindrical tube, or barrel, letting the syringe draw in or expel a liquid or gas through an orifice at the open end of the tube.

How does it work?
Pressure is used to operate a syringe. It is usually fitted with a hypodermic needle, nozzle, or tubing to help direct the flow into and out of the barrel. Plastic and disposable syringes are often used to administer medications.

How long is a syringe?
Standard needles vary in length from 3/8 inch to 3-1/2 inch. The location of the administration determines the needle length required. Generally, the further the depth of the injection, the longer the needle.

How many mL does a standard syringe hold?
Most syringes used for injections or to precisely measure oral medication are calibrated in milliliters (mL), also known as cc (cubic centimeters) as this is the standard unit for medication. The most frequently used syringe is the 3 mL syringe, but syringes as small as 0.5 mL and as large as 50 mL are also used.

Can I use the same syringe but different needle?
Is it acceptable to use the same syringe to give an injection to more than one patient if I change the needle between patients? No. Once they are used, the syringe and needle are both contaminated and must be discarded. Use a new sterile syringe and needle for each patient.

How do you disinfect a syringe?
Pour some undiluted (full-strength, no water added) bleach into a cup, cap or something that only you will use. Fill the syringe by drawing the bleach up through the needle to the top of the syringe. Shake it around and tap it. Leave the bleach in the syringe for at least 30 seconds.