Arterial Blood Gases

Assessing respiratory & acid base status, testing of carboxy- and methaemoglobin

Coagulopathy, inadequate collateral circulation

If appropriate

Heparinised syringe with needle

Gauze and tape

Sharps container

Test request form, patient labels

Place index and middle fingers over the desired artery and feel for the area of maximum impulse

Decontaminate with alcohol swab, allow to air dry

Palpate for a pulse proximal to desired collection site

Allow the syringe to self-fill

Apply gentle pressure to the area using gauze or cotton ball for at least five minutes

Remove the needle, cap the syringe, gently invert

Dispose of sharps and other waste

Label the syringe and send to the lab