To test whether pre - disinfection skin scrub with 4% chlorhexidine gluconate is more effective on the reduction of surgical site microbial colonization and subsequent infection than is normal saline.
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
the positive rate of the baseline culture , the preoperative culture , and the postoperative culture
Timeframe: within 30 days after the operation