Different doses of dexmedetomidine as adjuvant to intrathecal bupivacaine in total abdominal hysterectomy

INTERVENTION: Intervention1: Nil: Nil Intervention2: Dexmedetomidine as adjuvant in BUPIVACAINE inTotal abdomen hysterectomy: Evaluation of different doses INTRATHECAL dexmedetomidine as adjuvant to INTRATHECAL BUPIVACAINE in total abdominal hysterectomy Control Intervention1: Different doses of dexmedetomidine: Dose 3,5,10mcg , intrathecal once in every patient total duration is 24 month Control Intervention2: Nil: Nil CONDITION: Health Condition 1: ‐ Health Condition 2: 1‐ Obstetrics PRIMARY OUTCOME: Onset of sensory block 15min ; Onset of motor block 15min ; Duration of sensory and motor block within 15 minTimepoint: Onset of sensory block in 15 min ; Onset of motor block in 15 min ; Duration of sensory and motor block 15 min SECONDARY OUTCOME: Postoperative analgesia requirements ; Intra operation hemodynamic stability ; RSScaleTimepoint: In 48 week INCLUSION CRITERIA: Age 18‐45 yr ASA grade 1 and 2 BMI ‐ 18‐28 kg/m2