comparison between the erector spinae block and caudal block with the aid of the of ultra sound in children as regard time of request of rescue analgesia , degree of intra and post operative pain relief , effect of hemodynamic stability and incidences of complication in open renal surgeries .
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
primary outcome
Timeframe: at the time of transfer from PACU and then at 1, 2, 3, 4, 6, 8 and 12 hours postoperatively