Survival benefit of neoadjuvant FOLFIRINOX for patients with borderline resectable pancreatic cancer.

Backgrounds/Aims: While patients with borderline resectable pancreatic cancer (BRPC) are a target population for neoadjuvant chemotherapy (NAC), formal guidelines for neoadjuvant therapy are lacking. We assessed the perioperative and oncological outcomes in patients with BRPC undergoing NAC with FOLFIRINOX for patients undergoing upfront surgery (US). Methods: The AHPBA criteria for borderline resectability and/or a CA19-9 level > 100 µ/mL defined borderline resectable tumors retrieved from a prospectively populated institutional registry from 2007 to 2020. The primary outcome was overall survival (OS) at 1 and 3 years. A Cox Proportional Hazard model based on intention to treat was used. A receiver-operator characteristics (ROC) curve was constructed to assess the discriminatory capability of the use of CA19-9 > 100 µ/mL to predict resectability and mortality. Results: Forty BRPC patients underwent NAC, while 46 underwent US. The median OS with NAC was 19.8 months (interquartile range [IQR] 10.3-44.24) vs. 10.6 months (IQR 6.37-17.6) with US. At 1 year, 70% of the NAC group and 41.3% of the US group survived (p = 0.008). At 3 years, 42.5 % of the NAC group and 10.9% of the US group survived (p = 0.001). NAC significantly reduced the hazard of death (adjusted hazard ratio, 0.20; 95% confidence interval, 0.07-0.54; p = 0.001). CA19-9 > 100 µ/mL showed poor discrimination in predicting mortality, but was a moderate predictor of resectability. Conclusions: We found a survival benefit of NAC with FOLFIRINOX for BRPC. Greater pre-treatment of CA19-9 and multivessel involvement on initial imaging were associated with progression of the disease following NAC.

Opioid use after outpatient elective general surgery: quantifying the burden of persistent use.

Purpose: Surgery is a major risk factor for chronic opioid use among patients who had not recently been prescribed opioids. This study identifies the rate of, and risk factors for, persistent opioid use following laparoscopic cholecystectomy and open inguinal hernia repair in patients not recently prescribed opioids. Methods: This retrospective population-based cohort study included all patients who had not been prescribed opioids in the 6 months prior to undergoing open inguinal hernia repair or laparoscopic cholecystectomy from January 2013 to July 2016 in Ontario. Opioid prescription was identified from the provincial Narcotics Monitoring System and data were obtained from the Institute for Clinical Evaluative Sciences. The primary outcome was persistent opioid use after surgery (3, 6, 9 and 12 months). Associated risk factors and prescribing patterns were also examined. Results: Among the 90,326 patients in the study cohort, 80% filled an opioid prescription after surgery, with 11%, 9%, 5% and 1% filling a prescription at 3, 6, 9 and 12 months, respectively. Significant variability was identified in the type of opioid prescribed (41% codeine, 31% oxycodone, 18% tramadol) and in regional prescribing patterns (mean prescription/region range, 135-225 oral morphine equivalents). Predictors of continued opioid use included age, female gender, lower income quintile and being operated on by less experienced surgeons. Conclusion: Most patients who undergo elective cholecystectomy and hernia repair will fill a prescription for an opioid after surgery, and many will continue to fill opioid prescriptions for considerably longer than clinically anticipated. There is important variability in opioid type, regional prescribing patterns and risk factors that identify strategic targets to reduce the opioid burden in this patient population.

A framework for role allocation in education, research and leadership services in Canadian academic divisions of general surgery: a modified Delphi consensus.

BACKGROUND: Moving toward a funding standard similar to that for clinical services for roles essential to the functioning of education, research and leadership services within divisions of general surgery is necessary to strengthen divisional resilience. We aimed to identify roles and underlying tasks in these services central to sustainable functioning of Canadian academic divisions of general surgery. METHODS: Between June 2018 and October 2020, we used a 4-step modified Delphi method (online survey, face-to-face nominal group technique [n = 12], semistructured telephone interview [n = 8] and nominal group technique [n = 12]) to achieve national consensus from an expert panel of all 17 heads of academic divisions of general surgery in Canada on the roles and accompanying tasks essential to education, research and leadership services within an academic division of general surgery. We used 70% agreement to determine consensus. RESULTS: The expert panel agreed that a framework for role allocation in education, research and leadership services was relevant and necessary. Consensus was reached for 7 roles within the educational service, 3 roles within the research service and 5 roles within the leadership service. CONCLUSION: Our framework represents a national consensus that defines role standards for education, research and leadership services in Canadian academic divisions of general surgery. The framework can help divisions build resiliency, and enable sustained and deliberate advances in these services.

PATCH-DP: a single-arm phase II trial of intra-operative application of HEMOPATCH™ to the pancreatic stump to prevent post-operative pancreatic fistula following distal pancreatectomy.

BACKGROUND: Post-operative pancreatic fistula (POPF) is the most significant cause of morbidity following distal pancreatectomy. Hemopatch™ is a thin, bovine collagen-based hemostatic sealant. We hypothesized that application of Hemopatch™ to the pancreatic stump following distal pancreatectomy would decrease the incidence of clinically-significant POPF. METHODS: We conducted a prospective, single-arm, multicentre phase II study of application of Hemopatch™ to the pancreatic stump following distal pancreatectomy. The primary outcome was clinically-significant POPF within 90 days of surgery. A sample size of 52 patients was required to demonstrate a 50% relative reduction in Grade B/C POPF from a baseline incidence of 20%, with a type I error of 0.2 and power of 0.75. Secondary outcomes included incidence of POPF (all grades), 90-day mortality, 90-day morbidity, re-interventions, and length of stay. RESULTS: Adequate fixation Hemopatch™ to the pancreatic stump was successful in all cases. The rate of grade B/C POPF was 25% (95%CI: 14.0-39.0%). There was no significant difference in the incidence of grade B/C POPF compared to the historical baseline (p = 0.46). The 90-day incidence of Clavien-Dindo grade ≥3 complications was 26.9% (95%CI: 15.6-41.0%). CONCLUSION: The use of Hemopatch™ was not associated with a decreased incidence of clinically-significant POPF compared to historical rates. (NCT03410914).

Chronic stress physically spares but functionally impairs innate-like invariant T cells.

The deleterious effects of psychological stress on mainstream T lymphocytes are well documented. However, how stress impacts innate-like T cells is unclear. We report that long-term stress surprisingly abrogates both T helper 1 (TH1)- and TH2-type responses orchestrated by invariant natural killer T (iNKT) cells. This is not due to iNKT cell death because these cells are unusually refractory to stress-inflicted apoptosis. Activated iNKT cells in stressed mice exhibit a "split" inflammatory signature and trigger sudden serum interleukin-10 (IL-10), IL-23, and IL-27 spikes. iNKT cell dysregulation is mediated by cell-autonomous glucocorticoid receptor signaling and corrected upon habituation to predictable stressors. Importantly, under stress, iNKT cells fail to potentiate cytotoxicity against lymphoma or to reduce the burden of metastatic melanoma. Finally, stress physically spares mouse mucosa-associated invariant T (MAIT) cells but hinders their TH1-/TH2-type responses. The above findings are corroborated in human peripheral blood and hepatic iNKT/MAIT cell cultures. Our work uncovers a mechanism of stress-induced immunosuppression.

Successful percutaneous transgastric diversion of a chronic post-operative combined pancreaticocutaneous and gastrocutaneous fistula using a snare-target technique: A case report.

INTRODUCTION: Gastrocutaneous fistula complicating a post-operative or post-pancreatitis pancreatic fistula is uncommon, but has a high mortality rate and typically occurs 6-9 weeks after initial drainage. Conventional methods of treatment may be limited by the size of the fistula tract and visibility. PRESENTATION OF CASE: A 57-year-old man presented with a pancreatic duct leak, ten days after undergoing a distal pancreatectomy for renal cell carcinoma metastasis. Initial drainage attempts resulted in a chronic pancreaticocutaneous fistula (PCF)1 complicated by a separate gastric fistula sharing the same cutaneous tract along the inserted drain as well as recurrent symptomatic pleural effusions requiring repeat hospitalizations for management. The chronic fistula tract was too small for conventional direct puncture under fluoroscopic or endoscopic ultrasound guidance; therefore, percutaneous transgastric diversion of the combined pancreatico-gastrocutaneous fistula using a snare-target approach was performed with complete resolution of clinical symptoms. DISCUSSION: Complicated pancreatico-gastrocutaneous fistulae are rare and typically require drainage, either surgically or via percutaneous direct transgastric puncture or endoscopic-ultrasound guided stent insertion. This case report demonstrates that a minimally-invasive percutaneous snare-target approach can be effective in treating complex fistulae too small to be accessed through these conventional methods. This case also demonstrates that transgastric drainage along the tract, remote from either organ's fistula origin, can successfully divert and resolve the complex fistula without requiring direct drainage of the pancreatic duct itself. CONCLUSION: Incorporating the snare-target technique facilitates accurate transgastric drain placement within chronic fistula, particularly when the fistula caliber is too small for conventional drainage methods.

Pre-operative stenting and complications following pancreatoduodenectomy for pancreatic cancer: an analysis of the ACS-NSQIP registry.

BACKGROUND: Historically, pre-operative biliary stenting has been associated with higher infectious complication rates following pancreatoduodenectomy. However, alleviation of biliary obstruction is necessary for consideration of pre-operative chemotherapy, which may improve disease-free survival, or for mitigation of symptoms while awaiting surgery. Our aim is to compare contemporary post-operative complication risk among patients with pre-operative endoscopic retrograde cholangiopancreatography (ERCP) stenting compared to those without. METHODS: Patients who underwent a pancreatoduodenectomy for pancreatic cancer with biliary obstruction within the ACS-NSQIP registry from 2014 to 2017 were identified. The primary outcome was to compare the risk of 30-day complication (composite outcome) between patients with and without pre-operative ERCP stenting. Propensity score matching was used to ensure balanced baseline characteristics and log-binomial regression models were used to estimate risk ratios for overall perioperative complication between groups. RESULTS: From 6073 patients with obstructive jaundice undergoing pancreatoduodenectomy for pancreatic cancer, 92% (5564) were eligible for the study. After performing a propensity score matching on 20 baseline characteristics, 952 patients without stenting were matched to up to four patients who received pre-operative ERCP stenting (n = 3467) for a matched cohort of 4419. A total of 1901 (55%) patients with pre-operative ERCP stenting experienced a post-operative complication compared to 501 (53%) patients without stenting (risk ratio 1.04, 95% CI 0.97-1.11, p = 0.23). CONCLUSION: Pre-operative ERCP stenting was not associated with an increased risk of post-operative complication in patients undergoing pancreatoduodenectomy with obstructive jaundice. Biliary stenting may be safely considered for symptom relief and to potentially facilitate pre-operative chemotherapy for pancreatic cancer.

Venous thromboembolism in emergency general surgery patients: a single-centre retrospective cohort study

Background: There is limited literature on the risk of venous thromboembolism (VTE) in emergency general surgery (EGS) patients. We undertook this study to identify the rate of symptomatic VTE for patients undergoing EGS operations. Methods: We conducted a retrospective cohort study evaluating EGS patients who underwent operative intervention between March and December 2014. Data collected included patient demographics, type of procedure, risk of VTE, VTE prophylaxis, development of symptomatic VTE, and mortality. Results: We included 767 patients in our analysis. The mean age was 53 ± 19.7 years, and 52.2% of patients were female. Eighteen patients (2.3%) experienced VTE in hospital and 12 (1.6%) experienced VTE after discharge. Only 66% of patients received appropriate VTE prophylaxis. High-risk patients had a higher VTE rate (7.4% v. 2.3%, p < 0.001) and higher mortality (17.6% v. 4.0%, p < 0.001) than lowto moderate-risk patients. Conclusion: The risk of VTE in patients requiring EGS is significant and persists after hospital discharge. Further studies on quality improvement with VTE prophylaxis are warranted.

Contexte: La littérature sur le risque de thromboembolie veineuse (TEV) chez les patients soumis à une chirurgie générale urgente est limitée. Nous avons entrepris cette étude afin de mesurer le taux de TEV symptomatique chez les patients ayant subi une intervention urgente en chirurgie générale. Méthodes: Nous avons procédé à une étude de cohorte rétrospective sur les patients qui ont subi une chirurgie générale urgente entre mars et décembre 2014. Parmi les données recueillies, mentionnons données démographiques, type d'intervention, risque de TEV, thromboprophylaxie, apparition d'une TEV symptomatique et mortalité. Résultats: Nous avons inclus 767 patients dans notre analyse. L'âge moyen était de 53 ± 19,7 ans et 52,2 % des patients étaient de sexe féminin. Dix-huit patients (2,3 %) ont présenté une TEV en cours d'hospitalisation et 12 (1,6 %) après leur congé. Seulement 66 % des patients ont reçu une thromboprophylaxie adéquate. Les patients à haut risque ont présenté des taux de TEV (7,4 % c. 2,3 %, p < 0,001) et de mortalité (17,6 % c. 4,0 %, p < 0,001) plus élevés que les patients présentant un risque faible à modéré. Conclusion: Le risque de TEV chez les patients soumis à une chirurgie générale urgente est significatif et persiste après le congé hospitalier. Il faudra mener des études plus approfondies sur l'amélioration de la qualité de la thromboprophylaxie.

The impact of a new hepatopancreatobiliary surgery program on the management of pancreatic cancer at Health Sciences North

Background: Centralization of specialist services to urban centres presents a challenge to patients living in rural communities. The hepatopancreatobiliary surgery (HPB) program at Health Sciences North (HSN) is the tenth and newest HPB centre by Cancer Care Ontario and presents a unique opportunity to evaluate the barriers to delivering HPB cancer care to patients in northern Ontario. Methods: We retrospectively reviewed the cases of patients referred to the Northeastern Ontario Cancer Centre and HSN with a pancreatic cancer diagnosis between 2009 and 2015. July 2013 marked the inception of the HPB surgical program. Our primary outcome was time to HPB surgical consultation. Secondary outcomes included distance of travel and time to curative intent operation. Results: Our population consisted of 207 patients (98 pre-HPB v. 109 post-HPB). Median time to consultation with an HPB surgeon was decreased in the post-HPB group (43 v. 11 d, p < 0.001). An increased proportion of patients with pancreatic malignancies in the post-HPB group received HPB surgical consultations (34% v. 74%, p < 0.001), with decreased median distance travelled to surgical consultation (411 v. 79 km, p < 0.001). Time to curative intent operation or medical oncology consultation did not significantly increase. Conclusion: A new HPB program appears to have facilitated the proportion of patients with pancreatic malignancies at HSN receiving an HPB surgical consultation. Patients received complex surgeries, closer to their home regions. It is anticipated that these changes may affect overall outcomes and patient satisfaction and will be the focus of future investigations.

Contexte: La concentration des services spécialisés dans les centres urbains pose un défi pour les patients des communautés rurales. Le programme de chirurgie hépatopancréatobiliaire (HPB) d'Horizon Santé-Nord (HSN) est le 10e et plus récent centre HPB d'Action Cancer Ontario; il offre une occasion unique d'évaluer les obstacles à la prestation des soins oncologiques HPB aux patients du Nord de l'Ontario. Méthodes: Nous avons passé en revue de manière rétrospective les cas adressés au Centre de cancérologie du Nord-Est de l'Ontario et à HSN pour un diagnostic de cancer du pancréas entre 2009 et 2015. Le programme chirurgical HPB a été lancé en juillet 2013. Notre principal paramètre était le délai d'obtention d'une consultation pour une chirurgie HPB. Les paramètres secondaires incluaient la distance à parcourir et le délai d'obtention d'une intervention à visée curative. Résultats: Notre population comportait 207 patients (98 pré-HPB c. 109 post-HPB). Le délai médian d'obtention de la consultation en chirurgie HPB a diminué dans le groupe post-HPB (43 j c. 11 j, p < 0,001). Une proportion plus grande de patients atteints de cancer du pancréas dans le groupe post-HPB a obtenu une consultation pour chirurgie HPB (34 % c. 74 %, p < 0,001), et une diminution de la distance médiane à parcourir pour se rendre à la consultation a été constatée (411 km c. 79 km, p < 0,001). Le délai d'obtention de la chirurgie à visée curative ou de la consultation en oncologie médicale n'a pas augmenté significativement. Conclusion: Le nouveau programme HPB semble avoir permis d'accroître la proportion de patients atteints de cancer du pancréas ayant pu bénéficier d'une consultation pour chirurgie HPB. Les patients ont pu subir des chirurgies complexes plus près de chez eux. On prévoit que ces modifications auront une incidence sur les paramètres globaux et la satisfaction des patients et qu'elles feront l'objet d'études.

Health and Economic Impact of Intensive Surveillance for Distant Recurrence After Curative Treatment of Colon Cancer: A Mathematical Modeling Study.

BACKGROUND: Intensive surveillance strategies are currently recommended for patients after curative treatment of colon cancer, with the aim of secondary prevention of recurrence. Yet, intensive surveillance has not yielded improvements in overall patient survival compared with minimal follow-up, and more intensive surveillance may be costlier. OBJECTIVE: The purpose of this study was to estimate the quality-adjusted life-years, economic costs, and cost-effectiveness of various surveillance strategies after curative treatment of colon cancer. DESIGN: A Markov model was calibrated to reflect the natural history of colon cancer recurrence and used to estimate surveillance costs and outcomes. SETTINGS: This was a decision-analytic model. PATIENTS: Individuals entered the model at age 60 years after curative treatment for stage I, II, or III colon cancer. Other initial age groups were assessed in secondary analyses. MAIN OUTCOME MEASURES: We estimated the gains in quality-adjusted life-years achieved by early detection and treatment of recurrence, as well as the economic costs of surveillance under various strategies. RESULTS: Cost-effective strategies for patients with stage I colon cancer improved quality-adjusted life-expectancy by 0.02 to 0.06 quality-adjusted life-years at an incremental cost of $1702 to $13,019. For stage II, they improved quality-adjusted life expectancy by 0.03 to 0.09 quality-adjusted life-years at a cost of $2300 to $14,363. For stage III, they improved quality-adjusted life expectancy by 0.03 to 0.17 quality-adjusted life-years for a cost of $1416 to $17,631. At a commonly cited willingness-to-pay threshold of $100,000 per quality-adjusted life-year, the most cost-effective strategy for patients with a history of stage I or II colon cancer was liver ultrasound and chest x-ray annually. For those with a history of stage III colon cancer, the optimal strategy was liver ultrasound and chest x-ray every 6 months with CEA measurement every 6 months. LIMITATIONS: The study was limited by model structure assumptions and uncertainty around the values of the model's parameters. CONCLUSIONS: Given currently available data and within the limitations of a model-based decision-analytic approach, the effectiveness of routine intensive surveillance for patients after treatment of colon cancer appears, on average, to be small. Compared with testing using lower cost imaging, currently recommended strategies are associated with cost-effectiveness ratios that indicate low value according to well-accepted willingness-to-pay thresholds in the United States. See Video Abstract at http://links.lww.com/DCR/A921.

Standardization of Outpatient Procedure (STOP) Narcotics: A Prospective Non-Inferiority Study to Reduce Opioid Use in Outpatient General Surgical Procedures.

BACKGROUND: There has been a dramatic rise in opioid abuse, and diversion of excess, unused prescriptions is a major contributor. We assess the impact of implementing a new standardized pain care bundle to reduce postoperative opioids in outpatient general surgical procedures. STUDY DESIGN: This study was designed to demonstrate non-inferiority for the primary end point: patient-reported average pain in the first 7 postoperative days. We prospectively evaluated 224 patients who underwent laparoscopic cholecystectomy or open hernia repair (inguinal, umbilical) pre-intervention to 192 patients post-intervention. We implemented a multimodal intra- and postoperative analgesic bundle, including promoting co-analgesia, opioid-reduced prescriptions, and patient education designed to clarify patient expectations. Patients completed a brief pain inventory at their first postoperative visit. Groups were compared using chi-square test, Mann-Whitney U test, and independent samples t-test, where appropriate. RESULTS: No difference was seen in average postoperative pain scores in the pre- vs post-intervention groups (2.3 vs 2.1 of 10; p = 0.12). The reported quality of pain control improved post-intervention (good/very good pain control in 69% vs 85%; p < 0.001). The median total morphine equivalents for prescriptions filled in the post-intervention group were significantly less (100; interquartile range 75 to 116 pre-intervention vs 50; interquartile range 50 to 50 post-intervention; p < 0.001). Only 78 of 172 (45%) patients filled their opioid prescription in the post-intervention group (p < 0.001), with no significant difference in prescription renewals (3.5% pre-intervention vs 2.6% post-intervention; p = 0.62). CONCLUSIONS: For outpatient open hernia repair and cholecystectomy, a standardized pain care bundle decreased opioid prescribing significantly and frequently eliminated opioid use, and adequately treating postoperative pain and improving patient satisfaction.

Beyond just the operating room: characterizing the complete caseload of a tertiary acute care surgery service.

BACKGROUND: Most studies evaluating acute care surgery (ACS) models of care for patients with emergency general surgery (EGS) conditions have focused on patients who undergo surgery while admitted under the care of the ACS service. The purpose of this study was to prospectively examine the case mix of admissions and consultations to an ACS service at a tertiary centre to identify the frequency and distribution of both operatively and nonoperatively managed EGS conditions. METHODS: In this prospective cohort study, we evaluated consecutive patients assessed by the ACS team between July 1 and Aug. 31, 2015, at a large Canadian tertiary care centre. This included all consultations and outside hospital transfers. Diagnoses, demographic characteristics, comorbidities, intervention(s), complications, readmission and in-hospital death were captured. RESULTS: The ACS team was involved in the care of 359 patients, 176 (49.0%) of whom were admitted under the direct care of the ACS team. Nonoperative care was indicated in 82 patients (46.6%) admitted to the ACS service and 151 (82.5%) of those admitted to a non-ACS service (p < 0.001). Bowel obstruction (37 patients [21.0%]) was the most common reason for admission, followed by wound/abscess (24 [13.6%), biliary disease (24 [13.6%]) and appendiceal disease (23 [13.1%]). Rates of 30-day return to the emergency department and readmission were 17.0% and 9.1%, respectively, and the in-hospital mortality rate was 1.7%. CONCLUSION: Acute care surgery teams care for a wide breadth of disease, a considerable amount of which is managed nonoperatively.

CONTEXTE: La plupart des études qui ont évalué les modèles de soins chirurgicaux aigus (SCA) chez des patients souffrant de problèmes de santé nécessitant un traitement de chirurgie générale (TCG) d'urgence ont porté sur des patients ayant subi une intervention lors de leur admission dans un service de SCA. Le but de cette étude était d'analyser de manière prospective la clientèle admise ou vue en consultation dans le service de SCA d'un centre de soins tertiaires pour connaître la fréquence et la distribution des problèmes de santé nécessitant un TCG d'urgence effectivement traités chirurgicalement ou autrement. MÉTHODES: Dans cette étude de cohorte prospective, nous avons évalué des patients consécutifs vus par l'équipe de SCA entre le 1er juillet et le 31 août 2015 dans un grand centre canadien de soins tertiaires. Cela incluait toutes les consultations et les transferts en provenance d'autres hôpitaux. Nous avons noté les diagnostics, les caractéristiques démographiques, les comorbidités, les interventions, les complications, réadmissions et les décès en cours d'hospitalisation. RÉSULTATS: L'équipe de SCA a assuré les soins de 359 patients, dont 176 (49,0 %) avaient été admis directement au service de SCA. Des soins non chirurgicaux étaient indiqués chez 82 patients (46,6 %) admis au service de SCA et chez 151 (82,5 %) patients admis dans d'autres services (p < 0,001). L'obstruction intestinale (37 patients [21,0 %]) a été la raison la plus fréquente des admissions, suivie de blessure ou d'abcès (24 patients [13,6 %), maladie biliaire (24 patients [13,6 %]) et maladie appendiculaire (23 patients [13,1 %]). Les taux de retour aux urgences et de réadmission dans les 30 jours ont été de 17,0 % et de 9,1 %, respectivement, et le taux de mortalité en cours d'hospitalisation a été de 1,7 %. CONCLUSION: Les équipes de soins chirurgicaux aigus prennent en charge un vaste éventail de pathologies, dont une part importante est gérée de manière non chirurgicale.

Intra-Abdominal Hypertension Is More Common Than Previously Thought: A Prospective Study in a Mixed Medical-Surgical ICU.

OBJECTIVES: To determine the prevalence of intra-abdominal hypertension in mixed medical-surgical critically ill patients using modern definitions and measurement techniques. Secondarily to determine variables associated with intra-abdominal hypertension and ICU mortality. DESIGN: A prospective observational study. SETTING: Single institution trauma, medical and surgical ICU in Canada. PATIENTS: Consecutive adult patients admitted to the ICU (n = 285). INTERVENTION: Intra-abdominal pressure measurements twice a day during admission to the ICU. MEASUREMENTS AND MAIN RESULTS: In 285 patients who met inclusion criteria, 30% were diagnosed with intra-abdominal hypertension at admission and a further 15% developed intra-abdominal hypertension during admission. The prevalence of abdominal compartment syndrome was 3%. Obesity, sepsis, mechanical ventilation, and 24-hour fluid balance (> 3 L) were all independent predictors for intra-abdominal hypertension. Intra-abdominal hypertension occurred in 28% of nonventilated patients. Admission type (medical vs surgical vs trauma) was not a significant predictor of intra-abdominal hypertension. Overall ICU mortality was 20% and was significantly higher for patients with intra-abdominal hypertension (30%) compared with patients without intra-abdominal hypertension (11%). Intra-abdominal hypertension of any grade was an independent predictor of mortality (odds ratio, 3.33; 95% CI, 1.46-7.57). CONCLUSIONS: Intra-abdominal hypertension is common in both surgical and nonsurgical patients in the intensive care setting and was found to be independently associated with mortality. Despite prior reports to the contrary, intra-abdominal hypertension develops in nonventilated patients and in patients who do not have intra-abdominal hypertension at admission. Intra-abdominal pressure monitoring is inexpensive, provides valuable clinical information, and there may be a role for its routine measurement in the ICU. Future work should evaluate the impact of early interventions for patients with intra-abdominal hypertension.

Carbon monoxide and hydrogen sulphide reduce reperfusion injury in abdominal compartment syndrome.

BACKGROUND: Carbon monoxide (CO)- and hydrogen sulphide-releasing molecules (CORM-3 and GYY4137, respectively) have been shown to be potent antioxidant and antiinflammatory agents at the tissue and systemic level. We hypothesized that both CORM-3 and GYY4137 would reduce the significant organ dysfunction associated with abdominal compartment syndrome (ACS). MATERIAL AND METHODS: Randomized trial was conducted where ACS was maintained for 2 hours in 27 rats using an abdominal plaster cast and intraperitoneal CO2 insufflation at 20 mmHg. Three experimental groups underwent ACS and received an experimental molecule at the time of decompression: inactive CORM-3, active CORM-3, and GYY4137, whereas three groups underwent no ACS to serve as a sham. Sinusoidal perfusion, inflammatory response and cell death were quantified in exteriorized livers. Respiratory, liver, and renal dysfunction was assessed biochemically. RESULTS: Hepatocellular death and the number of activated leukocytes within postsinusoidal venules were significantly increased in rats with ACS (16-fold increase, 17-fold leukocyte activation, respectively, P < 0.05). Administration of CORM-3 or GYY4137 resulted in a significant decrease of both parameters (P = 0.03 and P = 0.009). ACS resulted in an increase in markers of renal and liver injury; CORM-3 or GYY4137 partially restored levels to those seen in sham animals. Myeloperoxidase was significantly elevated in the ACS group in lung, liver, and small intestine (P = 0.0002, P = 0.01, and P = 0.08, respectively). CORM-3 treatment, but not GYY4137, was able to completely block the response (65 ± 11 U/ml and 92 ± 18 U/ml, respectively versus 110 ± 10U/ml in the ACS group, lung tissue). CONCLUSIONS: We have demonstrated the effect of two molecules, CO and hydrogen sulphide, on tempering the reperfusion-associated metabolic and organ derangements in ACS. CORM-3 demonstrated a greater effect than GYY4137 and was able to restore most of the measured parameters to levels comparable to sham.

Evaluating the impact of a resident research program in general surgery.

BACKGROUND: Programs of resident research have been found to improve research productivity. However, evidence of the success of these programs is lacking in a Canadian context. The objective of this study was to evaluate the impact of the introduction of a formal program of resident research at a single Canadian academic centre. METHODS: Resident research activities were tracked over a 10-year period (Resident Research Day (RRD) presentations, abstract presentations, published articles). Activities were divided into pre (2002-2007) and post (2007-2012) resident research program implementation time frames. Differences in research productivity were compared between time frames. Surveys of resident attitudes towards research were administered prior to the program's implementation in 2007, and following introduction of the resident research program in 2009 and 2015. RESULTS: Overall, research productivity (abstracts, publications, and RRD presentations) increased between pre and post resident research program time periods, with a statistically significant increase in mean number of published abstracts. Resident attitudes towards research changed somewhat over time, with fewer residents supporting mandatory research in recent years. CONCLUSION: Implementation of a resident program of research resulted in a significant increase in research productivity. The setting of clear, modifiable, and achievable goals, as well as providing tools for research success, have contributed to the success of this program.

Impact of the Acute Care Surgery Model on Disease- and Patient-Specific Outcomes in Appendicitis and Biliary Disease: A Meta-Analysis.

BACKGROUND: The acute care surgery (ACS) model was developed to acknowledge the complexity of a traditionally fractured emergency general surgery patient population, however, there are variations in the design of ACS service models. This meta-analysis analyzes the impact of implementation of different ACS models on the outcomes for appendicitis and biliary disease. STUDY DESIGN: A systematic, English-language search of major databases was conducted. From 1,827 papers, 2 independent reviewers identified 25 studies that reported on outcomes for patients with appendicitis (n = 13), biliary disease (n = 7), or both (n = 5), before and after implementation of an ACS service. The Newcastle-Ottawa Scale was used to score quality. Outcomes were analyzed using random effect methodology and sensitivity analyses were performed. RESULTS: Significant heterogeneity existed between studies and ACS designs. The overall study quality rating was fair to poor with a moderate risk of bias. After implementation of an ACS service, there was an overall reduction in length of stay by 0.51 days (95% CI -0.81 to -0.20 days) and 0.73 days (95% CI 0.09 to 1.36 days) for appendicitis and biliary disease, respectively. Complication rates were lower after implementing ACS (odds ratio 0.65; 95% CI 0.49 to 0.86 and odds ratio 0.46; 95% CI 0.34 to 0.61). There was no difference in after-hours operating for either appendicitis or biliary disease, except when considering ACS models with dedicated theater time, which favors an ACS model (odds ratio 0.49; 95% CI 0.33 to 0.73) in appendicitis. CONCLUSIONS: The ACS model has been shown to benefit acute care surgery patients with improved access to care, fewer complications, and decreased length of stay for 2 common disease processes. The design and implementation of an ACS service can impact the magnitude of effect.

Processes of Health Care Delivery, Education, and Provider Satisfaction in Acute Care Surgery: A Systematic Review.

In recent years, significant workload, high acuity, and complexity of emergency general surgery conditions have led hospitals to replace the traditional on-call model with dedicated acute care surgery (ACS) service models. A systematic search of Ovid, EMBASE, and MEDLINE was undertaken to examine the impact of ACS services on health-care delivery processes and cost, education, and provider satisfaction. From 1827 papers, reviewers identified 22 studies that met inclusion criteria and subsequently used The Evidence-Based Practice for Improving Quality method and Newcastle-Ottawa Scale to score quality and level of evidence. Most studies found an increase in daytime operating, improved patient transit from emergency department to operating room to home, and decreased length of stay. Higher and more diverse case volumes improved resident education and operative experience. ACS services enhanced the educational experience of residents on subspecialty services by offloading emergency work from those services. Finally, surgeons generally felt that ACS services improved job satisfaction, productivity, and billing. The ACS model has demonstrated improvement in timeliness of care, diversified case mix, decreased costs, improved trainee learning, and increased surgeon job satisfaction.