<prompt> Shortest acting competitive neuromuscular blocker?MivacuriumPancuroniumAtracuriumDoxocurium  <response>: Ans. a Mivacurium Ref. Anaesthesia by Ajay Yadav, 3rd ed., p 93 MIVACURIUM is Shortest acting nondepolarising muscle relaxant is 10 min.MIVACURIUM Among all nondepolarising muscle relaxants it has shortest duration of action, Is an ideal M-relaxant for day care anesthesia. Usually no reversal required. Mivacurium is indicated as an adjunct to anesthesia to facilitate endotracheal intubation and to induce skeletal muscle relaxation in the surgical field. Metabolised by Pseudocholinesterase enzyme similar to succinylcholine.Properties of nondepolarizing muscle relaxantsRelaxantEd95 Mg KgIntubating Dose Mg KgOnset After IntubatingDuration MinutesShort-acting Mivacurium0.080.21-1.515-20 Rocuronium0.30.62-330Intermediate-acting Rocuronium0.31.21.060 Vecuronium0.050.15-0.21.560 Atracurium0.230.751-1.545-60 Cisatracurium0.050.2260-90Long-acting Pancuronium0.070.08-0.124-590 Pipecuronium0.050.07-0.853-580-90 Doxacurium0.0250.05-0.083-590-120Educational points:DRUGS METABOLIZED BY PSEUDOCHOLINESTERASE Propandid Remifentanyl Esmolol Mnemonic: PREM SE Mivacuronium Scoline Ester linked LA except cocaineRocuronium Mivacurium can be used in Rapid sequence induction as muscle relaxants... 