The Effect of Magnesium for Postoperative Catheter-related Bladder Discomfort in Male Patients Undergoing Laparoscopic Radical Resection of Liver or Colorectal Tumors

Interventions: Magnesia mixture group:Magnesium sulfate;Control group :Normal saline
Primary outcome(s): Incidence of urinary catheter-related bladder discomfort score >= 2
Study Design: Parallel

干预措施：镁剂混合组（给予硫酸镁，Magnesium sulfate）；对照组：给予生理盐水（Normal saline）。
主要结局指标：导尿管相关性膀胱不适评分（urinary catheter-related bladder discomfort score）≥2分的发生率。
研究设计：平行对照试验。