AbstractAim: to compare between intrathecal dexmedetomidine (5mcg) and intrathecal meperidine (0.2mg/kg) fordecreasing the incidence and intensity of shivering after spinal anesthesia for lower abdominal operations.Methods: The present study was conducted in the Department of Anesthesia, Vardhman Institute of MedicalScience, Pawapuri, Nalanda, Bihar, India from jan 2017 to December 2017, and ninety patients scheduled forlower abdominal operations under spinal anesthesia were randomly allocated to three groups. Spinal anesthesiaconsisted of 12.5 mg hyperbaric bupivacaine 0.5% in addition to dexmedetomidine (5mcg) (group D) ormeperidine (0.2 mg/kg) (group M) or, normal saline (group S). Different parameters, including sublingualtemperature, sensory block, motor block, incidence and intensity of shivering, blood pressure, heart rate, pruritus,nausea, and vomiting was performed at 10-minute intervals.Results: Hypothermia was recorded in 17 patients in group D, 16 patients in group M and 18 patients in group S,while shivering developed in 6 patients in group D, 7 patients in group M and 8 patients in group S, however,pruritus, nausea and vomiting was more common in the meperidine group compared to the other two groups.Conclusion: To conclude, intrathecal dexmedetomidine and meperidine lowered the incidence of shivering andincreased duration of sensory and motor block during lower abdominal operations. Intrathecal meperidine causedmore pruritus, nausea and vomiting than intrathecal dexmedetomidine.

AbstractAim: to compare between intrathecal dexmedetomidine (5mcg) and intrathecal meperidine (0.2mg/kg) fordecreasing the incidence and intensity of shivering after spinal anesthesia for lower abdominal operations.Methods: The present study was conducted in the Department of Anesthesia, Vardhman Institute of MedicalScience, Pawapuri, Nalanda, Bihar, India from jan 2017 to December 2017, and ninety patients scheduled forlower abdominal operations under spinal anesthesia were randomly allocated to three groups. Spinal anesthesiaconsisted of 12.5 mg hyperbaric bupivacaine 0.5% in addition to dexmedetomidine (5mcg) (group D) ormeperidine (0.2 mg/kg) (group M) or, normal saline (group S). Different parameters, including sublingualtemperature, sensory block, motor block, incidence and intensity of shivering, blood pressure, heart rate, pruritus,nausea, and vomiting was performed at 10-minute intervals.Results: Hypothermia was recorded in 17 patients in group D, 16 patients in group M and 18 patients in group S,while shivering developed in 6 patients in group D, 7 patients in group M and 8 patients in group S, however,pruritus, nausea and vomiting was more common in the meperidine group compared to the other two groups.Conclusion: To conclude, intrathecal dexmedetomidine and meperidine lowered the incidence of shivering andincreased duration of sensory and motor block during lower abdominal operations. Intrathecal meperidine causedmore pruritus, nausea and vomiting than intrathecal dexmedetomidine.