Guidelines:

• The ARROW and Terumo cannula is compatible with 0.025" wires, the KIMMAL-needle with 0.035" wires.

• Do not use straight wires; shape a "J".

• Never force the wire against resistance since the wire may take a false route.

• If resistance is met, check by fluoroscopy or angiography.

• If the 0.025" wire cannot be advanced beyond the brachial artery, introduce sheath first, followed by exchange for a 0.035" Terumo (hydrophilic) wire.

• When hydrophillic wires are used, be sure not entering small sidebranches.

• If the wire enters the descending instead of the ascending aorta , retry at deep inspiration or direct wire by the guiding catheter.