Acute Pain Clinical Trial
Official title:
Analgesic Efficacy of Magnesium Sulphate as an Adjuvant to Levobupivacaine in Erector Spinae Block for Acute Pain Management in Modified Radical Mastectomy
To evaluate the analgesic efficacy of magnesium sulphate as adjuvants to levobupivacaine in erector spinae plane block in modified radical mastectomy surgery for acute pain management
The participating female will be randomly allocated using computer generated randomization program (http://www.randoiler.org) into one of 2 groups. Group (C) / (I):20 patients (control group): Patient will receive 20 ml 0.25% levobupivacaine into interfascial plane below erector spinae muscle at level of T5. Group (M) / (III): 20 patients (magnesium slphate group): Patient will receive 20ml 0.25% levobupivacaine above + 0.7 mg/kg MgSo4. The patient, the anesthesiologist who administered the drugs and the data collector will be blinded to the study drugs. ** Study protocol Pre-operative and post-operative procedure: Premedication will be given, after complete fasting hours after applying standard monitors (noninvasive blood pressure, pulse oximetery, ECG, temperature and capnography), an intravenous cannula will be placed and secured. Ultrasound guided Erector spinae plane (ESP) block will be given with patient in sitting position depending on surgical site (left or right) ESP block will be given using high frequency linear u/s transducer, the probe is placed in longitudinal orientation lateral to thoracic fifth spinous process, then Trapezius muscle, Rhomboidus major muscle, and erector spinae muscle, are identified from surface, we deposite20 ml of 0.25% levobupivacaine into interfacial plane below erector spinae muscle. General anesthesia will be induced with fentanyl l μg /kg, propofol 2mg /kg, muscle relaxant (atracurium 0.5 mg/kg) inhalational anesthesia (isoflurane or sevoflurane) No other narcotic, analgesic or sedative will be administrated during operative period. Standard monitor (mean arterial blood pressure, heart rate , oxygen saturation & end-tidal Co2) will observed and recorded every 30 min till end of surgery Post-operative: The patient will be transferred to the post anesthesia care unit (PACU) and will be monitored for: 1. Vital signs (heart rate, noninvasive blood pressure, and oxygen saturation). 2. RASS score (Richmond Agitation & Sedation scale) with its +4:-5 score range will be used to assess sedation post-operative, considered sedation ≥-2 table (1) 3. Numerical Rating Score (NRS) pain score with its 0-10 score range will be used to assess pain immediately post-operative and then at 2, 4, 6, 8, 12,18and 24hour in the post-operative period figure (1). 4. Time and amount to request analgesia (PCA patient controlled analgesia morphine (demand dose 1-2 mg, lock out 6-10 min)) at NRS≥3. 5. Side effect of studied drugs as (hypotension, sedation , respiration depression and vomiting ) and complication of the block for 24h post- operative. ;
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