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Background: Cholecystectomy for conditions like iatrogenic injury during cholecystectomy can lead to complications such as bile duct injuries, necessitating alternative options like bioprosthesis.

Methods: This study evaluated a bioprosthesis's efficacy in maintaining bile duct continuity over 24 months in 16 male pigs.

Results: The bioprosthesis was implanted in the common bile duct of three-month-old animals, with follow-ups at 1, 6, 12, 18, and 24 months. Liver function remained stable, and biliary permeability was assessed through various imaging techniques. Despite mild stenosis, biliary flow was unimpeded. Histological analysis confirmed biliary epithelium presence in the regenerated area.

Conclusion: The bioprosthesis acted as a scaffold for tissue regeneration without compromising biliary function. Remnants of the bioprosthesis were observed but did not affect biliary excretion in the 24-month porcine model. This study highlights the bioprosthesis's potential in bile duct reconstruction, offering a safe and effective option for maintaining biliary continuity.

Background: Limited and heterogeneous literature data necessitate a focused examination of the learning curve in robotic liver resections. This study aims to assess the learning curve of two surgeons from the same team with differing laparoscopic backgrounds.

Methods: Since February 2021, San Raffaele Hospital in Milan has implemented a robotic liver surgery program, performing 250 resections by three trained console surgeons. Using cumulative sum (CUSUM) analysis, the learning curve was evaluated for a Pioneer Surgeon (PS) with around 1200 laparoscopic cases and a New Generation Surgeon (NGS) with approximately 100 laparoscopic cases. Cases were stratified by complexity (38 low, 74 intermediate, 85 high).

Results: Both PS and NGS demonstrated a learning curve for operative time after 15 low-complexity and 10 intermediate-complexity cases, with high-complexity learning curves apparent after 10 cases for PS and 18 cases for NGS. Conversion rates remained unaffected, and neither surgeon experienced increased blood loss or postoperative complications. A "team learning curve" effect in terms of operative time emerged after 12 cases, suggesting the importance of a cohesive surgical team.

Conclusion: The robotic platform facilitated a relatively brief learning curve for low and intermediate complexity cases, irrespective of laparoscopic background, underscoring the benefits of team collaboration.

Background: IPMN consensus guidelines make implicit judgments on what cancer risk level should prompt surgery. We used decision modeling to estimate this cancer risk threshold (CRT) for BD-IPMN patients.

Methods: We created a decision model to compare quality-adjusted life years (QALYs) following surgery or surveillance for BD-IPMNs. We simulated treatment decisions for hypothetical patients, varying age, comorbidities and lesion location (pancreatic head/tail). The base case was a 60-year-old patient with mild comorbidities and pancreatic head IPMN. Probabilities, life expectancies, and utilities were incorporated from literature/public datasets. CRT was defined as the level of cancer risk at which the expected value of QALYs for surgery first exceeded that of surveillance.

Results: In the base case, surgery was preferred over surveillance, yielding 21.90 vs. 21.88 QALYs. The optimal CRT for a BD-IPMN patient depended on age, comorbidities, and location. CRT in the base case was 20 % and 3 % for an IPMN in the head and tail of the pancreas, respectively. Other drivers of preferred treatment were age and likelihood of postoperative mortality.

Conclusion: For BD-IPMNs, the optimal CRT varies depending on patient age and risk of surgical complications. Personalized risk threshold values could guide treatment decisions and inform future treatment consensus guidelines.

Background: Pancreatoduodenectomy in elderly patients may be associated with increased postoperative mortality, but studies in minimally invasive pancreatoduodenectomy (MIPD) are scarce.

Methods: International multicenter retrospective study including patients aged >60 years undergoing MIPD (robot-assisted and laparoscopic) and open pancreatoduodenectomy (OPD), were categorized by age: 60-69, 70-79, and 80+ years. In each category, propensity score matching (PSM) was performed (1:1 ratio) between MIPD and OPD. Primary outcome was 30-day/in-hospital mortality.

Results: Among 3820 patients, we matched 1468 patients aged 60-69, 1154 patients aged 70-79, and 196 patients aged 80+ years. In patients aged 60-69 and 70-79 years, MIPD was associated with longer operative time, less blood loss and a longer length of stay. Major morbidity was higher after MIPD with similar 30-day/in-hospital mortality. The R0 resection rate was higher after MIPD. In patients aged 80+ years, besides a longer operative time in MIPD, outcomes were comparable between both groups.

Conclusion: This study found no evidence that increasing age worsens mortality of MIPD. MIPD was associated with longer operative time, higher rate of major morbidity, prolonged length of stay versus less blood loss and a higher R0 resection in patients aged 60-69 and 70-79 years. These differences continue in patients aged 80+ years, but became less evident.

Background: Recently, there has been an increase in the utilisation of the robotic platform to perform minimally invasive pancreaticoduodenectomy in high volume centres, with the goal of reducing morbidity and improving patient outcomes. This study reports the successful implementation of a robotic pancreaticoduodenectomy (RPD) programme in the relatively low volume setting of Australia, measured against established, internationally accepted benchmarks for low-risk open pancreaticoduodenectomy (OPD).

Methods: Retrospective review of a prospectively maintained database for consecutive RPD at two Brisbane hospitals was performed, comparing data to internationally established benchmarks for low-risk OPD. A structured RPD programme was implemented by two surgeons across a study period spanning May 2017 to December 2023.

Results: Over the study period, seventy-two consecutive RPDs were performed, with 79 % for malignancy. Perioperative outcomes for transfusions, conversion rate, postoperative fistula rate, morbidity, mortality and oncological outcomes were all within established benchmark cutoffs for low-risk open pancreaticoduodenectomy (OPD), although operative time exceeded the benchmark value by 0.7hrs.

Conclusion: A carefully implemented RPD programme in the low volume Australian setting is feasible, with high quality outcomes achievable when compared to established benchmarks for low-risk OPD and to reported RPD series published by high volume pioneering centres.

Background: Preoperative biliary drainage (PBD) has been introduced to control the negative effects of obstructive jaundice in patients undergoing pancreaticoduodenectomy (PD). The optimal time interval between PBD and PD remains unclear. The purpose of our systematic review and meta-analysis was to evaluate the optimal period for PBD before PD.

Methods: Studies were searched in PubMed, Science Direct, Google Scholar and Cochrane Library until 30 March 2024. Studies using PBD in patients with malignant obstructive jaundice that compared the short duration group (SDG) with prolonged duration group (PDG) were included in this study. The definitions of short and prolonged drainage were based on cut-off times reported in the included studies.

Results: Twelve studies were included. Based on the available data, short and prolonged drainage periods were defined by comparing the outcomes of surgeries performed within specific cut-off times of 2 weeks, 3 weeks, and 4 weeks after PBD. No significant differences were observed between the SDG and PDG in mortality, major morbidity, pancreatic fistula, post pancreatectomy haemorrhage, septic complications, operative time, and hospital stay, regardless of the delay of surgery.

Conclusion: When PBD is needed, pancreatic resection could be performed at the earliest possible stage after achieving optimal perioperative care.

Background: Limited data exists regarding the safety and outcomes of combined division of the splenic vessels with the pancreatic parenchyma during laparoscopic distal pancreatectomy (LDP). This study aims to evaluate the combined division technique.

Methods: Patients who underwent LDP for pancreatic cancer from April 2011 to December 2022 were retrospectively reviewed and categorized into the following groups: combined (CV) versus separate (SV) division of the splenic vein; combined (CA) versus separate (SA) division of the splenic artery; and combined (CAV) versus separate (SAV) division of the splenic artery and vein, with or without the pancreatic parenchyma.

Results: Among the 80 patients included, 44 underwent CV and 36 underwent SV. Operative time and major morbidity were significantly lower in CV compared with SV. Similar findings were observed in CAV versus SAV, as well as lower blood loss in CAV. Operative time was significantly lower in CA versus SA. Pancreatic fistula and postpancreatectomy hemorrhage rates showed no significant differences between groups. No patient developed splenic arteriovenous fistula in follow-up.

Conclusion: Combined division of the splenic vessels with the pancreatic parenchyma during LDP is safe and associated with improved outcomes compared with separate division.

Background: The association between chronic obstructive pulmonary disease (COPD) and risk for postoperative complications after pancreatic surgery has not been clarified. The aim of this study was to investigate if COPD is associated with increased risk for postoperative complications after pancreatoduodenectomy.

Methods: All patients aged ≥18 years undergoing pancreatoduodenectomy from 2008 to 2019 at a high-volume tertiary centre for pancreatic cancer surgery were included. COPD was defined as an established diagnosis according to the International Statistical Classification of Diseases. The primary outcome was Clavien-Dindo-score (CD)≥ IIIa.

Results: Out of 1009 available patients, 57 (5.6 %) had a diagnosis of COPD. There was no association between COPD and CD≥ IIIa (25.5 % vs. 29.8 % p-value 0.471). COPD was associated with an increased risk for postoperative pancreatic fistula (POPF) (odds ratio [OR] 3.06, 95 % confidence interval 1.62-5.89; p < 0.001). The 12 months mortality rate was higher among patients with COPD compared to patients without COPD, although not statistically significant (28.07 % vs., 18.17 %, p-value = 0.063).

Conclusion: COPD was associated with increased risk for POPF. These results imply that among patients deemed fit enough to undergo surgery, COPD should be thoroughly evaluated in the risk stratification.

Background: Compared to open pancreaticoduodenectomies (OPD), the robotic (RPD) approach decreases the rate of complication and the length of stay (LOS). However, it remains unknown if these benefits persist in octogenarians, who are at higher risk for perioperative morbidity and mortality.

Methods: A retrospective analysis of the ACS-NSQIP database was performed to identify patients aged 80 years or older who underwent PD for pancreatic adenocarcinoma between 2015-2021. Patients who underwent RPD or OPD were compared using inversed probability weighting of the propensity score. Outcomes assessed include operative time, LOS, non-home discharge, major complications, unplanned readmission, return to the operating room, mortality, and clinically relevant postoperative pancreatic fistula.

Results: Of 30,751 patients, 1720 were octogenarians. One thousand six hundred twenty-five patients (94 %) underwent OPD, and 95 (6 %) underwent RPD. RPD was significantly associated with a reduced incidence of major complications (32.6 % vs. 45.6 %; p < 0.01) and a lower rate of non-home discharge (24.7 % vs. 34.3%; p < 0.05). However, RPD was associated with a longer operative time (438 min vs. 342 min; p < 0.0001). There was no difference in other assessed outcomes.

Conclusion: RPD may reduce major postoperative complications and non-home discharges compared to the open approach for octogenarians.