The local anaesthetic toxicity is maximally seen with?: (A) Epidural, (B) Intercostal space, (C) Caudal space, (D) Sciatico-femoral nerve block
Answer is B. 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.