A comparative evaluation of intrathecal bupivacaine alone, sufentanil or butorphanol in combination with bupivacaine for endoscopic urological surgery.

Saudi J Anaesth · 2011 · PMC3139316 · PMID 21804804

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closest p

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highly significantno p-value reported

Pruritus was observed in 60% of the patients in the sufentanil group (highly significant P value), with the intensity of pruritus being tolerable and not requiring any treatment.

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