<prompt> A 5 year old boy suffering from Duchenne muscular dystrophy and polymyositis has been fasting for 8 hour and has to undergo tendon lengthening procedure. Which anaesthetics should be used?Induction by I.V. scoline and N20 halothane for maintenanceInduction by I.V. propofol, N20 and O2 for maintenanceInduction by I.V. thiopentone and N20 and halothane for maintenanceInhalational N20, halothane and O2 for maintenance  <response>: A halogenated anesthetic agent alone may trigger an episode of malignant hypehermia MH in patients with Duchennes and other muscular dystrophies, nonspecific myopathies, heat stroke, and osteogenesis imperfecta. Drugs Known to Trigger Malignant Hypehermia: Inhaled general anesthetics Ether Halothane Methoxyflurane Enflurane Isoflurane Desflurane Sevoflurane Nondepolarizing muscle relaxants Succinylcholine Ref: Butterwoh IV J.F., Butterwoh IV J.F., Mackey D.C., Wasnick J.D., Mackey D.C., Wasnick J.D. 2013. Chapter 52. Thermoregulation, Hypothermia, Malignant Hypehermia. In J.F. Butterwoh IV, J.F. Butterwoh IV, D.C. Mackey, J.D. Wasnick, D.C. Mackey, J.D. Wasnick Eds, Morgan Mikhails Clinical Anesthesiology, 5e. 