About this trial
This study aims to compare the analgesic efficacy of the transversalis fascia plane (TFP) block and intrathecal dexmedetomidine in patients undergoing cesarean section (CS).
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Age from 18 to 40 years.
American Society of Anesthesiology (ASA) physical status II.
Women undergoing cesarean section under spinal anesthesia.
Disqualifiers
Contraindication to spinal anesthesia.
Women with body mass index >40 kg/m2.
Pregnancy-induced hypertension
Local infection at the site of injection.
Trial design
Parallel
Treatments tested in this trial
Transversalis fascia plane block
Other interventionPatients will receive spinal anesthesia (using 2.5 mL of hyperbaric bupivacaine 0.5%) with bilateral transversalis fascia plane (TFP) block (using 20 mL of bupivacaine 0.25%) at the end of surgery.
Intrathecal dexmedetomidine
DrugPatients will receive spinal anesthesia (using 2.5 mL of hyperbaric bupivacaine 0.5%) + (5 µg intrathecal dexmedetomidine diluted in 0.5ml saline) with a sham block at the end of surgery.
Treatment groups
Trial outcomes
Primary outcomes
Degree of pain
Each patient will be instructed about postoperative pain assessment with the numeric rating scale (NRS) score. NRS (0 represents "no pain" while 10 represents "the worst pain imaginable"). NRS will be assessed at post-anesthesia care unit (PACU), 2, 4, 6, 8, 12, 18 and 24 h postoperatively.
Secondary outcomes
Total morphine consumption
Rescue analgesia of morphine will be given as 3 mg bolus if the numeric rating scale (NRS) \> 3 to be repeated after 30 min if pain persists until the NRS \< 4.
Time to the 1st rescue analgesia
Time to the first request for the rescue analgesia will be recorded from the end of surgery to first dose of morphine administrated.
Mean arterial pressure
Mean arterial pressure will be recorded preoperatively and every 30 minutes till the end of surgery.
Heart rate
Heart rate will be recorded preoperatively and every 30 minutes till the end of surgery.
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