<prompt> A 30 yr old man with paraplegia, the muscle relaxant should be avoided for tracheal intubation will beSuxamethoniumVecuroniumRocuroniumMivacurium  <response>: Succinylcholine can cause hyperkalemia in paraplegic patients due to proliferation of extrajunctional receptor. Conditions causing susceptibility to succinylcholine-induced hyperkalemia in an order. Myopathies eg, Duchennes dystrophy Spinal cord injury Encephalitis Stroke Guillain-Barre syndrome Severe Parkinsons disease Burn injury Massive trauma Severe intraabdominal infection Tetanus Hence the use of succinyl choline is avoided in all the above conditions. 