<prompt> The ideal muscle relaxant used for a neonate undergoing poo-enterostomy for biliary atresia is:AtracuriumVecuroniumPancuroniumRocuronium  <response>: A i.e. Atracurium In this case a muscle relaxant is required whose metabolism has nothing to do with liver preferabely it should not be excreted through bile. The straight forward answer is atracuriumcisatracurium as these are inactivated in plasma by spontaneous non enzymatic degradation Hoffman elimination independant of hepatic or renal function and biliary or urinary exceretion. 