Early Versus Late Drainage Removal in Patients Who Underwent Pancreaticoduodenectomy: A Comprehensive Systematic Review and Meta-analysis of Randomized Controlled Trials Using Trial Sequential Analysis.

BACKGROUND: The superiority of early drain removal (EDR) versus late (LDR) after pancreaticoduodenectomy (PD) has been demonstrated only in RCTs. METHODS: A meta-analysis was conducted using a random-effects model and trial sequential analysis. The critical endpoints were morbidity, redrainage, relaparotomy, and postoperative pancreatic fistula (CR-POPF). Hemorrhage (PPH), delayed gastric emptying (DGE), length of stay (LOS), and readmission rates were also evaluated. Risk ratios (RRs) and mean differences (MDs) with a 95% confidence interval (CI) were calculated. Type I and type II errors were excluded, comparing the accrued sample size (ASS) with the required sample size (RIS). When RIS is superior to ASS, type I or II errors can be hypothesized. RESULTS: ASS was 632 for all endpoints except DGE and PPH (557 patients). The major morbidity (RR 0.55; 95% CI 0.32-0.97) was lower in the EDR group. The CR-POPF rate was lower in the EDR than in the LDR group (RR 0.50), but this difference is not statistically significant (95% CI 0.24-1.03). The RIS to confirm or exclude these results can be reached by randomizing 5959 patients. The need for percutaneous drainage, relaparotomy, PPH, DGE, and readmission rates was similar. The related RISs were higher than ASS, and type II errors cannot be excluded. LOS was shorter in the EDR than the LDR group (MD - 2.25; 95% CI - 3.23 to - 1.28). The RIS was 567, and type I errors can be excluded. CONCLUSIONS: EDR, compared with LDR, is associated with lower major morbidity and shorter LOS.

Physical Prehabilitation in Patients who Underwent Major Abdominal Surgery: A Comprehensive Systematic Review and Component Network Meta-Analysis Using GRADE and CINeMA Approach.

BACKGROUND: Physical prehabilitation is recommended before major abdominal surgery to ameliorate short-term outcomes. METHODS: A frequentist, random-effects network meta-analysis (NMA) was performed to clarify which type of preoperative physical activity among aerobic exercise (AE), inspiratory muscle training (IMT), and resistance training produces benefits in patients who underwent major abdominal surgery. The surface under the P-score, odds ratio (OR), or mean difference (MD) with a 95% confidence interval (CI) were reported. The results were adjusted by using the component network approach. The critical endpoints were overall and major morbidity rate and mortality rate. The important but not critical endpoints were the length of stay (LOS) and pneumonia. RESULTS: The meta-analysis included 25 studies. The best approaches for overall morbidity rate were AE and AE + IMT (OR = 0.61, p-score = 0.76, and OR = 0.66, p-score = 0.68). The best approaches for pneumonia were AE + IMT and AE (OR = 0.21, p-score = 0.91, and OR = 0.52, p-score = 0.68). The component analysis confirmed that the best incremental OR (0.30; 95% CI 0.12-0.74) could be obtained using AE + IMT. The best approach for LOS was AE alone (MD - 1.63 days; 95% CI - 3.43 to 0.18). The best combination of components was AE + IMT (MD - 1.70; 95% CI - 2.06 to - 1.27). CONCLUSIONS: Physical prehabilitation reduces the overall morbidity rate, pneumonia, and length of stay. The most relevant effect of prehabilitation requires the simultaneous use of AE and IMT.

The Presence of an Aberrant Right Hepatic Artery Did Not Influence Surgical and Oncological Outcomes After Pancreaticoduodenectomy: A Comprehensive Systematic Review and Meta-Analysis.

BACKGROUND: The presence of an aberrant right hepatic artery (a-RHA) could influence the oncological and postoperative results after pancreaticoduodenectomy (PD). METHODS: A systematic review and metanalysis were conducted, including all comparative studies having patients who underwent PD without (na-RHA) or with a-RHA. The results were reported as risk ratios (RRs), mean differences (MDs), or hazard ratios (HRs) with 95% confidence intervals (95 CI). The random effects model was used to calculate the effect sizes. The endpoints were distinguished as critical and important. Critical endpoints were: R1 resection, overall survival (OS), morbidity, mortality, and biliary fistula (BL). Important endpoints were: postoperative pancreatic fistula (POPF), delayed gastric emptying (DGE), post pancreatectomy hemorrhage (PPH), length of stay (LOS), and operative time (OT). RESULTS: Considering the R1 rate no significant differences were observed between the two groups (RR 1.06; 0.89 to 1.27). The two groups have a similar OS (HR 0.95; 0.85 to 1.06). Postoperative morbidity and mortality were similar between the two groups, with a RR of 0.97 (0.88 to 1.06) and 0.81 (0.54 to 1.20), respectively. The biliary fistula rate was similar between the two groups (RR of 1.09; 0.72 to 1.66). No differences were observed for non-critical endpoints. CONCLUSION: The presence of a-RHA does not affect negatively the short-term and long-term clinical outcomes of PD.

Effect of malnutrition on postoperative results after pancreatic resection: An entropy balancing analysis.

BACKGROUND & AIMS: Malnutrition is a well-recognized risk factor for major surgery-related complications, but the impact of preoperative nutritional therapy is still debated due to a lack of high-level evidence. The study aims to evaluate the role of preoperative malnutrition in the postoperative course of patients who underwent pancreatic resection. METHODS: This is a retrospective study involving 488 patients who underwent pancreatic resection. An entropy balance was applied to 134 patients at risk for moderate or severe malnutrition (M/S-MAL) to obtain a cohort equal to 354 patients, with the null or low risk of malnutrition (N/L-MAL). The reweighting scheme was made in two steps. In the 1st reweighting, the two cohorts were homogenized for confounding factors not modifiable. In the 2nd reweighting, the two cohorts were matched for modifiable factors by preoperative dietary support. The entropy balance was evaluated with the d-value. The postoperative results were reported as mean differences (MD) or odds ratio (OR) with a confidence interval at 95% (95 CI). RESULTS: The M/S-MAL included patients with lower values of BMI (d < 0.750), hemoglobin (d = 0.671), serum albumin (d = 0.554), total protein (d = 0.381). The M/S-MAL patients were more frequent ECOG 1-2 (d = 0.418), with jaundice (d = 0.445) or back pain (d = 0.366). The pancreaticoduodenectomy (d = 0.440) and vascular resection (d = 0.620) in the M/S-MAL group were performed more frequently. The pancreatic remnant was more often hard (d = 0.527), and the Wirsung duct dilated (d = 0.459) in the N/L-MAL group. The rate of pancreatic ductal adenocarcinoma was higher in M/S-MAL (d = 0.399). After 1st weighting, M/S-MAL patients have a high comprehensive complication index (CCI) (MD = 5.5; 0.3 to 10.7), were more frequently discharged not at home (OR 2.3; 1.1 to 5.4) with a prolonged mean hospital stay (MD 6.1.1; 0.1 to 12.1, days), After 2nd weighting, the two groups have similar postoperative results. CONCLUSION: The correction of malnutrition could play an independent role in reducing the severity of complication, length of stay, and type of discharge in patients who underwent pancreatic resection.