الفهرس 
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Abstract
.9% NaCl perineural. Exclusion Criteria is morbid obesity, a history of chronic pain, diabetics, chronic renal failure, neuropathy or psychiatric disorder, drug or alcohol abuse, and hypersensitivity to local anaesthetics. During the period of the study 8 months at Faculty of Medicine; Ain-Shams University Hospital. The data was collected and presented as followed in several tables and figures.
The aim of this study is to compare the effect of adding either magnesium sulphate or dexamethasone as adjuvant in supraclavicular block from aspect of haemodynamic, onset, duration, of sensory and motor block.
group (A) mgso4 group by adding magnesium sulphate with bupivacaine there was marked reduction in mean arterial pressure and heart rate when compared with dexamethasone, and control group, but in case of sensory and motor block about 87.5% of study patient in this group have full motor and sensory block, in case of increasing time of motor and sensory block the magnesium sulphate success increasing time for motor and sensory block to reach 313 min sensory and 351 min in motor block, first call of Analgesic are after 5 hr.
group (B) by adding dexamethasone with bupivacaine the mean arterial blood pressure increased after 20 min of injection and return normal after 240 min, heart rate was normal, but in case of sensory and motor block about 77.5% of study patient in this group have full motor and sensory block, in case of increasing time of motor and sensory block the dexamethasone success increasing time for motor and sensory block to reach 278 min sensory and 314 min in motor block, first call of Analgesic are after 4hr which were less durable than MgSO4 group.
group A (Magnesium sulphate with bupivacaine) were more effective and increasing affected time in motor and sensory block than group B (Dexamethasone with Bupivacaine) and group C (Control).