The right radial<unk> .<unk>  is a medical procedure performed to obtain a sample of<unk> al blood for gas analysis. A needle is inserted into the radial<unk>  and spontaneously fills with blood. The syringe is either prepacked with a small amount of heparin to prevent coagulation, or must be heparinised, by drawing up a small amount of heparin and squirting it out again.
Radial artery puncture
Transradial catheterization
Meibography
Ankle–brachial pressure index
Pleximeter
Hair tourniquet
Intravascular ultrasound
Tourniquet