Pentothiol sodium should preferablay be injected into –
Femoral vein
Antecubital vein
Neck vein
Veins on outer aspect of fore arm
Inadverent intra-arterial injection occurs when thiopentone is injected in antecubital vein because in 10% of the cases brachial artery divides above elbow giving a very superficial abnormal artery which lies deep to antecubital vein. Therefore thiopentone injection should be given in the veins over the outer aspect of forearm (not in antecubital vein).