Some evidence-based blood conservation techniques include drugs that increase preoperative blood volume or decrease postoperative bleeding;
一些循证血液保护技术包括提高术前血容量或减少术后出血的药物；
Operation time, bleeding volume, postoperative pain time were recorded, and the differences among these 4 groups were analyzed.
分析4组在手术时间、术中出血量、术后疼痛时间有无差异。
Operation duration, bleeding volume and postoperative complications were compared between the two groups.
观察两组手术时间、出血量及术后病理情况。
Operation duration, bleeding volume and postoperative complications were compared between the two groups.
观察两组手术时间、出血量及术后病理情况。
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