الفهرس 
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Abstract
Twenty patients scheduled for surgical Interfere- oe were the subject of this study. No preanaesthetic dictation was given. Patients were classified into *0 groups. Patients of the first group (ten patients) ’peoeived thiopentone sodium 5 mg/kg as an induction followed by Suxamethonium 1 mg/kg. Patients of h* second group (ten patients) received diazepam 0.2 pug/kg before thiopentone sodium as an induction agent ’followed by Suxamethonium. All patients were oxygen- Incubated and maintained by ether carried by oxygen ,through Boyle’s apparatus. Estimation of serum potassium level before induction and five minutes after the ,end of Suxamethonium fasciculation’s showed significant increase in thiopentone group (P < 0.05). The mean serum potassium level before induction was 3.68 + 0.166 m.mol Litre and five minutes after Suxamethonium FAS- circulations was 3.91 + 0.176 m.mol Liter There was no significant change in serum potassium level in diazepam group, the mean serum potassium level before ind- Uction was 4.05 + 0.385 M.mol Liter . and five minutes after Suxamethonium fasciculation’s was 3.78 + 0.371 m.mol Liter.