Frequency of delayed gastric emtpying depending on the alimentaty reconstruction (Billroth-II vs. Roux-en-Y) following pancreatoduodenectomy

Interventions: Group 1: Data collection from our pancreatic resection database (whipple procedure with Billroth-II reconstruction). Data collected: Age, BMI, diagnosis, risk factors, intraoperative characteristics, delayed gastric emptying, surgical complications, length of stay.
Group 2: Data collection from our pancreatic resection database (whipple procedure with Roux-en-Y reconstruction). Data collected: Age, BMI, diagnosis, risk factors, intraoperative characteristics, delayed gastric emptying, surgical complications, length of stay.
Primary outcome(s): Frequency and severity of delayed gastric emptying according to the International Study Group of Pancreatic Surgery (ISGPS) definition during the hospital stay and readmission.
Study Design: Allocation: ; Masking: ; Control: ; Assignment: ; Study design purpose: other

干预措施：
组1：数据采集自本中心采用毕II式（Billroth-II）吻合重建的胰十二指肠切除术（Whipple procedure）数据库。采集的数据包括：年龄、体质量指数（Body Mass Index, BMI）、诊断结果、危险因素、术中特征、胃排空延迟、手术并发症、住院时长。
组2：数据采集自本中心采用鲁氏Y形（Roux-en-Y）吻合重建的胰十二指肠切除术（Whipple procedure）数据库。采集的数据包括：年龄、BMI、诊断结果、危险因素、术中特征、胃排空延迟、手术并发症、住院时长。
主要结局指标：依据国际胰腺外科研究组（International Study Group of Pancreatic Surgery, ISGPS）的定义，评估住院期间及再入院时胃排空延迟的发生率与严重程度。
研究设计：
分组方式：无；盲法设置：无；对照设置：无；分配方法：无；研究设计目的：其他