Injections are considered an invasive procedure.

Intradermal injections have the fastest rate of absorption compared to other injection routes.

Intravenous injections deliver medication directly into the bloodstream.

Subcutaneous injections are commonly used to administer insulin.

The barrel of a syringe contains measurement calibrations.

The inside of the syringe barrel does not need to be kept sterile.

Insulin syringes in Australia are calibrated on a 100-unit scale.

Tuberculin syringes are calibrated in tenths of a millilitre.

The smaller the gauge number of a needle, the larger its internal diameter.

A needle has four main parts: hub, shaft, lumen, and bevel.

The gauge of a needle refers to its length.

Ampoules hold multiple doses of medication.

A filter needle should be used when drawing medication from an ampoule to prevent glass contamination.

Air should be injected into a vial before withdrawing medication.

No more than 2 mL should be injected into a subcutaneous site.

Intramuscular injections are administered at a 45-degree angle.

The Z-track technique reduces medication leakage into subcutaneous tissue.

The ventrogluteal site is preferred because it avoids major nerves and blood vessels.

Used needles should always be recapped using both hands before disposal.