The aim of this work is to compare the hemodynamic and analgesic properties of Dexmedetomidine and Magnesium sulphate infusion in lower abdominal surgery.
Dexmedetomidine is a relatively new alpha 2 adrenergic receptor agonist with a higher α2/α1 selectivity ratio of 1620:1 that provides analgesic and anesthetic effects . Dexmedetomidine has various clinical uses in anesthesia such as sedation, and prolongation of the duration of postoperative analgesia when used as an adjuvant through intrathecal, epidural, or intravenous routes. Magnesium sulphate is another commonly used drug in anesthesia. Magnesium sulphate suppresses nociceptive impulses through inhibition of voltage-gated calcium channels and through antagonism of the N-methyl D-aspartate (NMDA) receptors. Although both drugs were reported to prolong the duration of spinal anesthesia, no studies to the best of our knowledge had compared the analgesic and hemodynamic profile of both drugs when used as intravenously during spinal anesthesia.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
QUADRUPLE
Enrollment
60
This group will receive Dexmedetomidine infusion at a rate of 0.5 mcg/kg/hour.
This group will receive Magnesium sulphate infusion at a rate of 15 mg/Kg/hour
This group will receive normal saline infusion
Cairo University
Cairo, Egypt
Duration of analgesia
Duration of analgesia after the operation defined as the time till the first analgesic request by the patient
Time frame: 24 hours
Systolic blood pressure
Systolic blood pressure measured in mmHg
Time frame: 6 hours
Diastolic blood pressure
Diastolic blood pressure measured in mmHg
Time frame: 6 hours
Heart rate
The number of heart beats per minute
Time frame: 6 hours
Onset of sensory block
The time needed to have complete sensory block after spinal anesthesia measured in minutes
Time frame: 30 minutes after spinal anesthesia
Onset of motor block
The time needed to have complete motor block after spinal anesthesia measured in minutes
Time frame: 30 minutes after spinal anesthesia
Duration of motor block
The time needed for recovery of motor motor after spinal anesthesia measured in hours
Time frame: 12 hours
Ramsay Sedation Scale
A scale used for assessment of sedation level ranges from 1 (combative) to 6 (unarousable)
Time frame: 12 hours after spinal anesthesia
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