<prompt> The local anaesthetic toxicity is maximally seen with?EpiduralIntercostal spaceCaudal spaceSciatico-femoral nerve block  <response>: According, the rate of systemic absorption is greatest with intercostal nerve blocks followed by caudal, lumbar epidural, brachial plexus block femoral and sciatic nerve blocks. Sequence of systemic absorption IV Tracheal Intercostal block Para cervical block Caudal Lumbar epidural Brachial Plexus Sciatic Subcutaneous. 