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Daily drainage volume on the first day after surgery was significantly less in the cold separation group than in the electrosurgical separation group (61.25 ± 27.76 mL vs 94.25 ± 46.09 mL), and the total drainage volume was significantly lower in the cold separation group than in the electrosurgical separation group (170.45 ± 75.40 mL vs 281.05 ± 148.43mL; P = .005). P value <.05, *; ≤.01, **.
