Relationship between medical programme progress test performance and surgical clinical attachment timing and performance.

PURPOSE: Progress tests (PTs) assess applied knowledge, promote knowledge integration, and facilitate retention. Clinical attachments catalyse learning through an appropriate learning context. The relationship between PT results and clinical attachment sequence and performance are under-explored. Aims: (1) Determine the effect of Year 4 general surgical attachment (GSA) completion and sequence on overall PT performance, and for surgically coded items; (2) Determine the association between PT results in the first 2 years and GSA assessment outcomes. MATERIALS AND METHODS: All students enrolled in the medical programme, who started Year 2 between January 2013 and January 2016, were included; with follow up until December 2018. A linear mixed model was applied to study the effect of undertaking a GSA on subsequent PT results. Logistic regressions were used to explore the effect of past PT performance on the likelihood of a student receiving a distinction grade in the GSA. RESULTS: 965 students were included, representing 2191 PT items (363 surgical items). Sequenced exposure to the GSA in Year 4 was associated with increased performance on surgically coded PT items, but not overall performance on the PT, with the difference decreasing over the year. PT performance in Years 2-3 was associated with an increased likelihood of being awarded a GSA distinction grade (OR 1.62, p < 0.001), with overall PT performance a better predictor than performance on surgically coded items. CONCLUSIONS: Exposure to a surgical attachment improves PT results in surgically coded PT items, although with a diminishing effect over time, implying clinical exposure may accelerate subject specific learning. Timing of the GSA did not influence end of year performance in the PT. There is some evidence that students who perform well on PTs in preclinical years are more likely to receive a distinction grade in a surgical attachment than those with lower PT scores.

Adjuvant Chemotherapy in the Treatment of Intraductal Papillary Mucinous Neoplasms of the Pancreas: Systematic Review and Meta-Analysis.

BACKGROUND: The present systematic review aimed to compare survival outcomes of invasive intraductal papillary mucinous neoplasms (IIPMNs) treated with adjuvant chemotherapy versus surgery alone and to identify pathologic features that may predict survival benefit from adjuvant chemotherapy. METHOD: A systematic search of MEDLINE, PubMed, Scopus, and EMBASE was performed using the PRISMA framework. Studies comparing adjuvant chemotherapy and surgery alone for patients with IIPMNs were included. Primary endpoint was overall survival (OS). A narrative synthesis was performed to identify pathologic features that predicted survival benefits from adjuvant chemotherapy. RESULTS: Eleven studies and 3393 patients with IIPMNs were included in the meta-analysis. Adjuvant chemotherapy significantly reduced the risk of death in the overall cohort (HR 0.57, 95% CI 0.38-0.87, p = 0.009) and node-positive patients (HR 0.29, 95% CI 0.13-0.64, p = 0.002). Weighted median survival difference between adjuvant chemotherapy and surgery alone in node-positive patients was 11.6 months (95% CI 3.83-19.38, p = 0.003) favouring chemotherapy. Adjuvant chemotherapy had no impact on OS in node-negative patients (HR 0.53, 95% CI 0.20-1.43, p = 0.209). High heterogeneity (I2 > 75%) was observed in pooled estimates of hazard ratios. Improved OS following adjuvant chemotherapy was reported for patients with stage III/IV disease, tumour size > 2 cm, node-positive status, grade 3 tumour differentiation, positive margin status, tubular carcinoma subtype, and presence of perineural or lymphovascular invasion. CONCLUSION: Adjuvant chemotherapy was associated with improved OS in node-positive IIPMNs. However, the findings were limited by marked heterogeneity. Future large multicentre prospective studies are needed to confirm these findings and explore additional predictors of improved OS to guide patient selection for adjuvant chemotherapy.

Synchronous Liver Resection, Cytoreductive Surgery, and Hyperthermic Intraperitoneal Chemotherapy for Colorectal Liver and Peritoneal Metastases: A Systematic Review and Meta-analysis.

BACKGROUND: Synchronous liver resection, cytoreductive surgery, and hyperthermic intraperitoneal chemotherapy for colorectal liver and peritoneal metastases have traditionally been contraindicated. More recent clinical practice has begun to promote this aggressive treatment in select patients. OBJECTIVE: This study aimed to investigate the perioperative and oncological outcomes of patients undergoing cytoreductive surgery and hyperthermic intraperitoneal chemotherapy, with and without liver resection, in the management of metastatic colorectal cancer. DATA SOURCES: Medline, Embase, and Cochrane Library databases were searched up to July 2020. STUDY SELECTION: Cohort studies comparing outcomes following cytoreductive surgery and hyperthermic intraperitoneal chemotherapy with and without liver resection for metastatic colorectal cancer were reviewed. No randomized controlled trials were available. INTERVENTION: Cytoreductive surgery and hyperthermic intraperitoneal chemotherapy with or without synchronous liver resection were compared. MAIN OUTCOME MEASURES: The primary outcome measures were perioperative mortality and major morbidity. Secondary outcomes included 3- and 5-year overall survival and 1- and 3-year disease-free survival. RESULTS: Fourteen studies fitted the inclusion criteria, with 8 studies included in the meta-analysis. On pooled analysis, there was no significant difference in perioperative morbidity and mortality between the two groups. Patients that underwent concomitant liver resection had worse 1- and 3-year disease-free survival and 3- and 5-year overall survival. LIMITATIONS: Only a limited number of studies were available, with a moderate degree of heterogeneity. CONCLUSIONS: The addition of synchronous liver resection to cytoreductive surgery and hyperthermic intraperitoneal chemotherapy for the treatment of resectable metastatic colorectal cancer was not associated with increased perioperative major morbidity and mortality in comparison with cytoreduction and hyperthermic intraperitoneal chemotherapy alone. However, the presence of liver metastases was associated with inferior disease-free and overall survival. These data support the continued practice of liver resection, cytoreductive surgery, and hyperthermic intraperitoneal chemotherapy in the management of select patients with such stage IV disease.

Epidural Versus Transabdominal Wall Catheters: A Comparative Study of Outcomes After Pancreatic Resection.

BACKGROUND: This study compared epidural analgesia with local anesthetic administration via transabdominal wall catheters (TAWC), to determine the effect on perioperative outcomes in pancreatic surgery. MATERIALS AND METHODS: A retrospective review of patients undergoing open pancreatic surgery at Auckland City Hospital from 2015 to 2018 was undertaken. Data collected included patient demographics, type of perioperative analgesia, intravenous fluid and vasopressor use, length of high dependency unit stay, postoperative complications, and length of hospital stay. RESULTS: Seventy-two patients underwent pancreatic surgery, of which 47 had epidural analgesia and 25 TAWC. The median age was 64 y (range 29-85). Failure of analgesia method occurred in 45% of epidural patients and 28% of TAWC patients (P = 0.209). There was no significant difference in volume of intravenous fluid given or need for vasopressors in the first 3 postoperative days, length of high dependency unit stay (median 1 d, P = 0.2836), rates of postoperative pancreatic fistula (32% versus 40%, P = 0.6046), postoperative complications (38% versus 20%, P = 0.183), or mortality (0.04% versus 0.04%, P = 1.0). CONCLUSIONS: Epidural analgesia and TAWC may have comparable perioperative outcomes in patients undergoing pancreatic surgery. Further randomized studies with a larger cohort of patients are warranted to identify the best postoperative analgesic method in patients undergoing pancreatic resection.

A systematic scoping review of the initial experience with laparoscopic radical antegrade modular pancreatosplenectomy for pancreatic malignancy.

BACKGROUND: Laparoscopic radical antegrade modular pancreatosplenectomy (L-RAMPS) is a validated surgical approach for the surgical treatment of pancreatic malignancies of the body and tail of the pancreas. Open (O-) RAMPS is an established technique that offers oncological efficacy and acceptable post-operative outcomes when compared to standard distal pancreatectomy for pancreatic malignancies. This review aimed to determine the types of evidence available for L-RAMPS, and its selection criteria and reported outcomes, using systematic scoping review methodology. METHODS: A systematic review of available literature was performed in September 2020. Data extracted included patient selection criteria, technical details, total number of L-RAMPS procedures performed, lymph nodes retrieved, resection margins, survival, LOS and complications. RESULTS: Eight papers were eligible for inclusion, totalling 92 cases. There were no studies that directly compared O- to L-RAMPS. All reports were small retrospective cohorts with 3-30 patients. Selection criteria were reported in 4/8 studies and differed between studies. Technique descriptions were included in 6/8 studies. Studies reported a median of 5 (range 1-9) out of ten operative and clinical outcomes, including operative time median range 188-431 min, intraoperative blood loss median range 18-445 mL, R0 resection rate median range 91-100%, number of lymph nodes median range 11-43, and length of stay median range 12-20 days. CONCLUSIONS: L-RAMPS is infrequently reported in the literature. There are currently no data to allow for direct comparison of O- and L-RAMPS. Reports of L-RAMPS have an acceptable oncological and safety profile. A standardised description of the operative technique and outcome reporting, as well as specific training initiatives may be beneficial to broaden the application of L-RAMPS.

Systematic review and meta-analysis of risk factors of postoperative pancreatic fistula after distal pancreatectomy in the era of 2016 International Study Group pancreatic fistula definition.

BACKGROUND: Risk factors for the development of clinically relevant POPF (CR-POPF) following distal pancreatectomy (DP) need clarification particularly following the 2016 International Study Group of Pancreatic Fistula (ISGPF) definition. METHODS: A systemic search of MEDLINE, Pubmed, Scopus, and EMBASE were conducted using the PRISMA framework. Studies were evaluated for risk factors for the development CR-POPF after DP using the 2016 ISGPF definition. Further subgroup analysis was undertaken on studies ≥10 patients in exposed and non-exposed subgroups. RESULTS: Forty-three studies with 8864 patients were included in the meta-analysis. The weighted rate of CR-POPF was 20.4% (95%-CI: 17.7-23.4%). Smoking (OR 1.29, 95%-CI: 1.08-1.53, p = 0.02) and open DP (OR 1.43, 95%-CI: 1.02-2.01, p = 0.04) were found to be significant risk factors of CR-POPF. Diabetes (OR 0.81, 95%-CI: 0.68-0.95, p = 0.02) was a significant protective factor against CR-POPF. Substantial heterogeneity was observed in the comparisons of pancreatic texture and body mass index. Seventeen risk factors achieved significance in a univariate or multivariate comparison as reported by individual studies in the narrative synthesis, however, they remain difficult to interpret as statistically significant comparisons were not uniform. CONCLUSION: This meta-analysis found smoking and open DP to be risk factors and diabetes to be protective factor of CR-POPF in the era of 2016 ISGPF definition.

Systematic review of liver directed therapy for uveal melanoma hepatic metastases.

BACKGROUND: Uveal melanoma (UM) is a rare malignancy with a propensity for metastasis to the liver. Systemic chemotherapy is typically ineffective in these patients with liver metastases and overall survival is poor. There are no evidence-based guidelines for management of UM liver metastases. The aim of this study was to review the evidence for management of UM liver metastases. METHODS: A systematic review of English literature publications was conducted across Ovid Medline, Ovid MEDLINE and Cochrane CENTRAL databases until April 2019. The primary outcome was overall survival, with disease free survival as a secondary outcome. RESULTS: 55 studies were included in the study, with 2446 patients treated overall. The majority of these studies were retrospective, with 17 of 55 including comparative data. Treatment modalities included surgery, isolated hepatic perfusion (IHP), hepatic artery infusion (HAI), transarterial chemoembolization (TACE), selective internal radiotherapy (SIRT) and Immunoembolization (IE). Survival varied greatly between treatments and between studies using the same treatments. Both surgery and liver-directed treatments were shown to have benefit in selected patients. CONCLUSION: Predominantly retrospective and uncontrolled studies suggest that surgery and locoregional techniques may prolong survival. Substantial variability in patient selection and study design makes comparison of data and formulation of recommendations challenging.

Effect of vessel preservation on splenic volume and function in patients with spleen preserving distal pancreatectomies.

BACKGROUND: Spleen preservation during distal pancreatectomy (SpDP) can be accomplished by a variety of surgical approaches, but the impact on spleen function is unknown. This study aimed to compare spleen volume, function and complications between patients who underwent vessel sparing (VSDP) vs. vessel ligating (Warshaw, WDP) SpDP. METHODS: All patients who underwent SpDP at the Toronto General Hospital from 2006 to 2015 were included. Primary outcomes were pre- and post-operative spleen volumes and contrast enhancement on CT, hematologic parameters, and spleen-related complications. RESULTS: 82 patients underwent SpDP with median follow up of 20.4 months. Splenic volumes were able to be calculated on 44 patients (VSDP n = 8, WDP n = 36). There was no difference between WDP and VSDP in operative duration, blood loss, hospital length of stay, or Clavien-Dindo ≥3 complication rate. Spleen volumes did not differ from baseline in either group. On postoperative imaging more WDP patients had areas of splenic hypoperfusion (p = 0.032). These differences resolved by 3 months after surgery, there were no instances of long term infectious or bleeding complications related to poor splenic function or gastric varices. CONCLUSION: Both WDP and VSDP achieve splenic preservation. Neither technique resulted in clinically apparent spleen related complications. There is no difference in splenic volume and function in the short/long term.

Effect of portal vein embolization on treatment plan prior to major hepatectomy for hepatocellular carcinoma.

BACKGROUND: Portal vein embolization (PVE) is used before major hepatectomy for hepatocellular carcinoma (HCC) to increase future liver remnant (FLR) volume. However, this may increase tumour growth rate, leading to more extensive resections. This study aimed to determine the effect of tumour growth, following PVE, on treatment plan. METHOD: Retrospective cohort study conducted on patients treated from 2008 to 2015 with PVE before major hepatectomy for HCC. Liver and tumour volumetry was performed on pre- and post-PVE CT scans. Image-based and actioned plans were compared before and after PVE. RESULTS: Thirty-one patients received PVE. Non-tumour total liver volume decreased (median 1440 to 1394 cm3; p = 0.031), while tumour (median 161-240 cm3; p < 0.001) and FLR volumes (median 430-574 cm3; p < 0.001) increased. The treatment plan changed in 15/31 patients: more extensive resection (n = 6), less extensive resection (n = 1), no resection as scheduled (n = 8). Tumour progression accounted for a clinically relevant change in treatment plan in 8/31 patients. CONCLUSION: Following PVE in the setting of HCC, tumour progression accounts for a change in treatment plan in approximately a quarter of patients. Further research is warranted to determine whether additional liver directed therapy should routinely be used to slow the growth of HCC post-PVE.

Renal outcomes following left renal vein harvest for venous reconstruction during pancreas and liver surgery.

BACKGROUND: The left renal vein (LRV) may be used for venous reconstruction during hepato-pancreato-biliary (HPB) surgery, although concerns exist about compromising renal function. This study aimed to determine renal outcomes following LRV harvest during HPB resections. METHODS: Circumferential PV/SMV resections from 2008 to 2014 were included within two groups (LRV harvest, Control). Absolute and change in Creatinine (Cr) and estimated GFR (eGFR), and rates of acute kidney injury (AKI) and chronic kidney disease (CKD), were compared. Multivariate logistic regression analyses were performed. RESULTS: 76 patients were included (LRV n = 17, Control n = 59). Median Cr and eGFR did not change within groups, although change in eGFR differed between groups at postoperative day (POD) 3 (-4.3 vs. 12.8, p = 0.0035) and 7 (-1.8 vs. 12.4, p = 0.0074). AKI occurred more frequently in the LRV group at POD1 (5/17 vs. 4/59, p = 0.023) and POD3 (5/17 vs. 3/59, p = 0012), with no difference in CKD between groups (2/11 vs. 5/33 at 3 months, p = 0.99). LRV harvest was an independent risk factor for AKI at POD1 and POD3, but not thereafter. CONCLUSIONS: Patients who undergo LRV harvest experience a higher rate of AKI in the first three post-operative days. LRV harvest during pancreas resection does not impact on long-term renal function.

Neoadjuvant therapy and major arterial resection for potentially reconstructable arterial involvement by stage 3 adenocarcinoma of the pancreas.

BACKGROUND: Stage 3 pancreatic ductal adenocarcinoma (PDAC) is defined by arterial involvement. This study objective was to evaluate outcomes for patients with stage 3 PDAC with potentially reconstructable arterial involvement, considered for neoadjuvant therapy (NAT) and pancreatic resection, and to compare outcomes following arterial (AR) and non-arterial resection (NAR). METHODS: This study included patients from 2009 to 2016 with biopsy-proven stage 3 PDAC who were offered NAT before surgical exploration. AR was performed if required to achieve R0 resection. Time to event outcomes were analysed from diagnosis date. RESULTS: 87/89 patients (97.8%) received NAT (chemotherapy 41.6%, chemotherapy/radiotherapy 56.2%). 46/89 (51.7%) underwent exploration; 31 underwent resection (AR n = 20, NAR n = 11). AR patients had longer operative time (681 vs. 563 min, p = 0.006) and more blood loss (1600 vs. 575 mL, p = 0.0004), with no difference for blood transfusion, pancreatic fistula, length of stay, reoperation, or mortality. R0 rate was 30/31. Post-resection 90-day mortality was 3.2%. Median overall survival was statistically comparable between the AR and NAR groups (19.7 vs. 28.4 months, p = 0.41). CONCLUSIONS: AR had comparable clinical and oncologic outcomes to NAR. Following careful selection and non-progression after NAT, major AR may cautiously be considered if required to obtain a negative resection margin.

Neoadjuvant hyperfractionated chemoradiation and liver transplantation for unresectable perihilar cholangiocarcinoma in Canada.

BACKGROUND AND OBJECTIVES: Neoadjuvant chemoradiation and liver transplantation may be offered for unresectable perihilar cholangiocarcinoma (pCCA). This study aimed to determine the dropout rate and survival of patients who entered a national tri-modality protocol. METHOD: Patients enrolled Jan 2009-Aug 2015 were included. Enrolment criteria: ≤65 years, brush biopsy-proven unresectable pCCA <3.5 cm diameter. Conformal radiotherapy was given concurrently with Capecitabine. Following surgical staging, patients received maintenance Cisplatin and Gemcitabine until transplant or progression. Time to event analyses were performed from start of neoadjuvant therapy. RESULTS: Of 43 patients screened, 18 started treatment; median age 53.9 (26.7-62.8) years, tumour diameter 2.7 (2.0-3.4) cm. 11/18 dropped out due to metastatic disease identified during chemoradiation (n = 2), surgical staging (n = 6), or maintenance chemotherapy (n = 3). Six patients underwent transplantation. Median follow up was 17.6 (4.9-57.7) months and overall survival 16.4 months. One and two year survival was 70.6% and 35.3%, respectively. One and 2 year post transplant survival was 83.3% and 55.6%. Median progression free survival was 11.5 months. CONCLUSION: Neoadjuvant chemoradiation and liver transplantation for unresectable early stage pCCA is feasible, although with high rates of dropout and disease progression. Further research is required to determine factors to help select patients for treatment.

Paradigms in trauma laparoscopy for anterior abdominal stab wounds: A scoping review.

INTRODUCTION: Anterior abdominal stab wounds (AASW) are a heterogeneous presentation with evolving management over time and heterogenous practice between centres. The aim of this scoping review was to identify, characterise and classify paradigms for trauma laparoscopies for AASW. METHODOLOGY: Studies were screened from Embase, Medline, Scopus, Cochrane Library and Web of Science from 1 January 1947 until 1 January 2023. Extracted data included indications for trauma laparoscopies vs laparotomies, and criteria for conversion to an open procedure. RESULTS: Of 72 included studies, 35 (48.6 %) were published in the United States, with an increasing number from South Africa since 2014. Screening tests to determine an indication for surgery included local wound exploration, computed tomography, and serial clinical examination. Two studies proposed no absolute contraindications to laparoscopy, whereas most papers supported trauma laparoscopies over laparotomies in hemodynamically stable patients with positive or equivocal screening tests. However, clinical decision trees were used inconsistently both between and within many hospital centres. Triggers for conversion to laparotomy were diverse. Older studies typically reported conversion if peritoneal breach was identified. More recent studies reported advances in technical skills and technology allowed attempt at laparoscopic repair for organ and/or vascular injury. CONCLUSION: This review emphasises that there are many different paradigms of practice for AASW laparoscopy, which are evolving over time. Significant heterogeneity of these studies highlights that meta-analysis of outcomes for trauma laparoscopy is not appropriate unless the included studies report homogenous treatment paradigms and patient cohorts. The decision to perform a trauma laparoscopy should be based on surgeon/hospital experience, patient factors, and resource availability.

Role of neoadjuvant peptide receptor radionuclide therapy in unresectable and metastatic gastro-entero-pancreatic neuroendocrine neoplasms: A scoping review.

Peptide receptor radionuclide therapy (PRRT) is an established therapy for metastatic neuroendocrine neoplasms (NEN). The role of PRRT as a neoadjuvant treatment prior to surgery or other local therapies is uncertain. This scoping review aimed to define the landscape of evidence available detailing the utility of PRRT in the neo-adjuvant setting, including the clinical contexts, efficacy, and levels of evidence. A comprehensive literature search of PUBMED, SCOPUS, and EMBASE through to December 2022 was performed to identify reports of PRRT use as neoadjuvant therapy prior to local therapies. Observational studies and clinical trials were included. A total of 369 records were identified by the initial search, and 17 were included in the final analysis, comprising 179 patients treated with neoadjuvant PRRT. Publications included case reports, retrospective cohort series and a phase 2 trial. Definitions of unresectable disease were variable. Radioisotopes used included 177Lu (n = 142) and 90Y (n = 36), used separately (n = 178) or in combination (n = 1). A combination of PRRT with chemotherapy was also explored (n = 2). Toxicity data was reported in 11/17 studies. Survival analysis was reported in 3/17 studies. Surgical resection following PRRT was reported for both the primary tumor (n = 71) and metastases (n = 12). Resection rates could not be calculated as not all publications reported whether resection was completed. Published literature exploring the use of PRRT in the neoadjuvant setting is mostly limited to case reports and retrospective cohort studies. From these limited data there is reported to be a role of PRRT in neoadjuvant setting in the literature. However, the low quality of evidence precludes any definite conclusion on the grade of disease, site of primary, isotope used or use of concomitant chemotherapy that can benefit from this application. Further prospective studies will require collaboration between multiple centers to gain sufficient high-quality evidence.

Near-Peer Coaching to Enhance Operative Learning: An Educational Innovation for Surgical Training.

Objective: To design, implement, and evaluate a near-peer coaching model to enhance operative learning in general surgery training. Background: There is an urgent need to maximize operative learning in surgical education. Trainees find barriers to operative learning difficult to navigate and often sacrifice educational opportunities for the sake of impression management. Methods: A prospective cohort study was conducted over a 6-month period following design and implementation of a trainee-led near-peer coaching model; "SPICE" (Set goals, Plan, Imagine, Comment and feedback, Evaluate and reflect). Semistructured interviews were conducted to explore trainees' experiences of the model. Results: Twelve trainees participated in the study. The near-peer coaching encounters provided trainees with the psychological safety to be honest about learning needs, validated insecurities, and mitigated the pressures associated with impression management that consistently shaped consultant-trainee relationships. Trainees described improved operative performance, increased self-confidence, and a greater ability to adapt to the unexpected. Trainees adapted the use of the SPICE model to conventional consultant-trainee dynamics, which facilitated learning conversations and negotiation of operative opportunities. On a broader scale, trainees noticed an improvement in the teaching culture of the unit, describing that the use of the model legitimized the importance of perioperative learning conversations and increased consultant enthusiasm for teaching. Conclusions: Near-peer coaching created a unique psychological safety that facilitated authentic reflection and goal setting and improved trainee confidence. The benefits of the SPICE model were translated to other contexts and facilitated entrustment in conventional consultant-trainee relationships.

Reducing Preoperative Fasting Through Technology and Education in an Acute General Surgical Adult Cohort.

BACKGROUND: Despite widespread support for reduced fasting protocols prior to anesthesia, the traditional "fast from midnight" (FFMN) remains widely employed. This study implemented a pilot preoperative fasting reduction program for patients booked for acute surgery in the Department of General Surgery at a busy metropolitan tertiary hospital, including use of an electronic health record (EHR)-based solution, aiming to measure effect on fasting times and use of intravenous fluid (IVF). METHODS: A pilot program was implemented in August 2021 in the Emergency General Surgery (EGS) unit at the Royal Melbourne Hospital, Australia. This included a new smart phrase within the EHR (EU2WU6: Eat until 2, drink water until 6) and an education campaign. Adult patients who underwent preoperative fasting between September 1 and December 31, 2021, were screened. Uptake of the protocol was recorded. Further, total fasting times (TFT) and IVF use were recorded. Potential impact with varying levels of protocol uptake was modeled. RESULTS: Uptake of EU2WU6 increased from 0% to 80%. TFT and total time on IVF (TT-IVF) were lower using EU2WU6 (TFT 7 hours vs. 13 hours, p < 0.001; TT-IVF 3 hours vs. 8 hours, p < 0.001). Proportion of patients requiring fluid overnight when using EU2WU6 was lower (18/45 vs. 34/50, p = 0.0062). Hospitalwide yearly savings, with 100% application of EU2WU6, were projected at 2,050 bags of IVF (at a cost savings of A$2,296), 10,251 minutes for physicians, and 20,502 minutes for nurses. CONCLUSION: The pilot preoperative fasting reduction program successfully reduced disparity between evidence and clinical practice.

Comparison of risk adjusted excess post-operative pancreatic fistula rates after pancreaticoduodenectomy using cumulative sum analysis.

BACKGROUND: Post-operative pancreatic fistula (POPF) is a key outcome post pancreaticoduodenectomy. There are numerous POPF risk calculators but no agreed benchmark, a key component of meaningful audit. We compared observed versus predicted POPF for six risk adjusted POPF calculators, to ascertain how they differ and thus contribute to discussion around benchmarking. METHODS: This was a retrospective single-arm cohort study at the Royal Melbourne Hospital of patients who underwent pancreaticoduodenectomy 1 November 2015 to 31 December 2021 with a primary outcome of a clinically relevant POPF. Cumulative sum (CUSUM) plots of observed versus predicted rate of POPF for sequential patients were constructed for six risk adjusted POPF calculators - Birmingham, updated Birmingham, fistula risk score (FRS), modified FRS (m-FRS), alternative FRS (a-FRS), and updated alternative FRS (ua-FRS). RESULTS: The study included 77 patients. The actual rate of clinically relevant POPF was 14.3%. FRS calculated an excess of 1.3 POPF per 100 cases. All other calculators demonstrated prevention of POPF per 100 cases: Birmingham 3.4, updated Birmingham 14.0, m-FRS 0.3, a-FRS 1.2, ua-FRS 19.7. CONCLUSION: The observed versus predicted rate of POPF was near zero for all risk calculators except ua-FRS and updated Birmingham, which predicted a higher POPF than observed (19.7, 14.0, respectively). These results indicate that, excepting ua-FRS and updated Birmingham, these calculators yield comparable results. Benchmarks for POPF should prescribe which risk calculators are used, and ideally a unified standard between centres should be the goal to provide consistency in outcome reporting and robust audit processes.

A comprehensive classification of invasive procedures for treating the local complications of acute pancreatitis based on visualization, route, and purpose.

BACKGROUND/AIMS: The lack of a system to classify invasive procedures to treat local complications of acute pancreatitis is an obstacle to comparing interventions. This study aimed to develop and validate a comprehensive multidisciplinary classification. METHODS: Standardized terminology was used to develop a classification of procedures based on three key components: how the lesion is visualized, the route used during the procedure, and the procedure's purpose. Gastroenterologists, radiologists, and surgeons (n = 22) from three New Zealand centers independently classified 15 published technique descriptions. Inter-rater reliability was calculated for each component. The classification's clarity, ease of use, and potential to achieve its objectives were rated on a Likert scale. RESULTS: The classification's clarity, ease of use, and potential to achieve its objectives had median scores of 4/5. Inter-rater reliability for visualization, route, and purpose components was substantial at 0.73 (95% CI 0.63-0.82), 0.79 (95% CI 0.70-0.87), and 0.64 (95% CI 0.53-0.74), respectively. CONCLUSIONS: This article describes the development and validation of a comprehensive classification for the wide range of procedures used to treat the local complications of acute pancreatitis. It has substantial inter-rater reliability and high acceptability, which should enhance communication between clinicians and facilitate comparison between procedures.

Early organ-specific mitochondrial dysfunction of jejunum and lung found in rats with experimental acute pancreatitis.

INTRODUCTION: Multiple organ dysfunction is the main cause of death in severe acute pancreatitis. Primary mitochondrial dysfunction plays a central role in the development and progression of organ failure in critical illness. The present study investigated mitochondrial function in seven tissues during early experimental acute pancreatitis. METHODS: Twenty-eight male Wistar rats (463 ± 2 g; mean ± SEM) were studied. Group 1 (n= 8), saline control; Group 2 (n= 6), caerulein-induced mild acute pancreatitis; Group 3 (n= 7) sham surgical controls; and Group 4 (n= 7), taurocholate-induced severe acute pancreatitis. Animals were euthanased at 6 h from the induction of acute pancreatitis and mitochondrial function was assessed in the heart, lung, liver, kidney, pancreas, duodenum and jejunum by mitochondrial respirometry. RESULTS: Significant early mitochondrial dysfunction was present in the pancreas, lung and jejunum in both models of acute pancreatitis, however, the Heart, liver, kidney and duodenal mitochondria were unaffected. CONCLUSIONS: The present study provides the first description of early organ-selective mitochondrial dysfunction in the lung and jejunum during acute pancreatitis. Research is now needed to identify the underlying pathophysiology behind the organ selective mitochondrial dysfunction, and the potential benefits of early mitochondrial-specific therapies in acute pancreatitis.

Learning in the Operating Theatre: A Thematic Analysis of Opportunities Lost and Found.

OBJECTIVE: The operating theatre (OT) is an important learning environment. Trainees face barriers to learning in the OT that may reduce meaningful educational interactions. The impact of these barriers on the intraoperative learning experience of trainees and the strategies that they employ to overcome them are not known. This qualitative study aimed to describe the intraoperative learning experiences of senior general surgery trainees in Australia and their strategies to optimize learning in the OT. DESIGN, SETTING, PARTICIPANTS: The authors developed a semi-structured interview guide based on published literature. Purposive sampling was used to identify a representative group of general surgery trainees in Australia, who were interviewed in a private setting with audio recordings deidentified for verbatim transcription and analysis. Thematic analysis was conducted using an interpretivist approach to produce a coding framework. RESULTS: Ten trainees participated in the study. Themes were divided into external and internal barriers to learning, promoters of effective learning and actions to facilitate learning. External barriers included cultural neglect of an important issue, with inadequate prioritization of teaching and a lack of structure for intraoperative learning. From this, we identified the theme of missed opportunities. Internal barriers included difficulties in developing assertiveness required to address these issues and a failure to adequately plan for learning, with reliance on the mentor to initiate. Actions to facilitate learning were rarely employed by trainees, as most were unaware of strategies to maximize intraoperative learning. CONCLUSIONS: Trainees find the barriers to learning in the OT difficult to address and are not well acquainted with strategies that may allow them to maximize their learning.