Showing papers in "Canadian Journal of Surgery in 2021"

Preoperative malnutrition in patients with colorectal cancer.

Abstract: Preoperative malnutrition in patients with colorectal cancer is associated with several postoperative consequences and poorer prognosis. Currently, there is a lack of a universal screening tool to assess nutritional status, and intervention to treat preoperative malnutrition is often neglected. This review summarizes and compares preoperative screening and interventional tools to help providers optimize malnourished patients with colorectal cancer for surgery. We found that nutritional screenings, such as the Subjectibe Global Assessment, Patient-Generated Subjective Global Assessment, Prognostic Nutritional Index, Nutrition Risk Index, Malnutrition Universal Screening Tool, Nutrition Risk Screening 2002, Nutrition Risk Score, serum albumin, and prealbumin, have all effectively predicted postoperative outcome. Physicians should consider which of these tools best fits their needs based on the their mode of assessment, efficiency, and specified parameters. Additionally, preoperative nutritional support, such as trimodal prehabilitation, modified peripheral parenteral nutrition, and N-3 fatty acid and arginine supplementation, which have also benefited patients postoperatively, ought to be implemented appropriately according to their ease of execution. Given the high prevalence of preoperative malnutrition in patients undergoing surgery for colorectal cancer, it is essential that health care providers assess and treat this malnutrition to reduce postoperative complications and length of hospital stay, and to improve prognosis to augment a patient's quality of care.La malnutrition preoperatoire chez les patients atteints d'un cancer colorectal est associee a plusieurs complications postoperatoires et a un pronostic plus sombre. Il n'existe actuellement aucun outil universel d'evaluation du statut nutritionnel, et les mesures visant a corriger la malnutrition preoperatoire font souvent defaut. La presente revue resume et compare les outils de depistage et d'intervention preoperatoires pour aider les professionnels a ameliorer l'etat des patients denutris qui doivent subir une chirurgie pour le cancer colorectal. Nous avons constate que le depistage nutritionnel a l'aide de questionnaires tels que l'Evaluation globale subjective, l'Index nutritionnel pronostique, l'Outil universel de depistage de la malnutrition, NRS 2002 (Nutrition Risk Screening 2002), l'evaluation du risque nutritionnel, et le dosage de l'albumine et de la prealbumine seriques, a permis de predire avec justesse l'issue de la chirurgie. Les medecins devraient verifier lequel de ces outils est le mieux adapte a leurs besoins selon leur modalite d'evaluation, leur efficience et autres parametres specifiques. Egalement, un soutien nutritionnel preoperatoire, comme la preadaptation trimodale, la nutrition parenterale peripherique modifiee et les supplements d'acides gras N-3 et d'arginine, qui ont aussi donne des resultats postoperatoires favorables, devrait etre applique selon sa facilite d'administration. Etant donne la forte prevalence de la malnutrition preoperatoire chez les patients soumis a une chirurgie pour cancer colorectal, les professionnels de la sante se doivent d'evaluer et de corriger la malnutrition afin de prevenir les complications postoperatoires, d'abreger la duree du sejour hospitalier, et d'ameliorer ainsi le pronostic et la qualite des soins.

Patients' perspectives of prehabilitation as an extension of Enhanced Recovery After Surgery protocols.

Abstract: Background Enhanced Recovery After Surgery (ERAS) and prehabilitation programs are evidence-based and patient-focused, yet meaningful patient input could further enhance these interventions to produce superior patient outcomes and patient experiences. We conducted a qualitative study with patients who had undergone colorectal surgery under ERAS care to determine how they prepared for surgery, their views on prehabilitation and how prehabilitation could be delivered to best meet patient needs. Methods We conducted semistructured interviews with adult patients who had undergone colorectal surgery under ERAS care within 3 months after surgery. Patients were enrolled between April 2018 and June 2019 through purposive sampling from 1 hospital in Alberta. The interview transcripts were analyzed independently by a researcher and a trained patient-researcher using inductive thematic analysis. Results Twenty patients were interviewed. Three main themes were identified. First, waiting for surgery: patients described fear, anxiety, isolation and deterioration of their mental and physical states as they waited passively for surgery. Second, preparing would have been better than just waiting: patients perceived that a prehabilitation program could prepare them for their operation if it addressed their emotional and physical needs, provided personalized support, offered home strategies, involved family and included surgical expectations (both what to expect and what is expected of them). Third, partnering with patients: preoperative preparation should occur on a continuum that meets patients where they are at and in a partnership that respects patients' expertise and desired level of engagement. Conclusion We identified several patient priorities for the preoperative period. Integrating these priorities within ERAS and prehabilitative programs could improve patient satisfaction, experiences and outcomes. Actively engaging patients in their care might alleviate some of the anxiety and fear associated with waiting passively for surgery.

Cancellation of elective surgery: rates, reasons and effect on patient satisfaction.

Abstract: Background The cancellation of elective surgeries is a major problem that increases wait times, exacerbates costs and can negatively affect patients, both psychologically and physically. Our objectives were to investigate the reasons for cancellations across specialties at a single centre, to compare these reasons with previous data from the same centre between 2005 and 2009 and to examine how cancellations affected patients’ lives and views of the medical system in cases when the cancellations were potentially preventable. Methods Cancellation records of all elective surgeries scheduled between June 1, 2012, and Jan. 31, 2016, at a medium-sized, tertiary care, academic centre were retrospectively reviewed. We evaluated the rates and reasons for cancellation and interviewed a subset of patients whose surgery was cancelled for a potentially preventable reason (i.e., operating room running late, bed shortage, emergency case took place of scheduled surgery). Results Across 11 surgical specialties, 2933 of 20 881 surgeries (14.0%) were cancelled and of these, 2448 (83.5%) were for administrative or structural reasons. Compared with the data collected previously for general, gynecological and urological procedures, cancellation rates increased from 8.1% to 11.8%. Although patients reported inconvenience, they were generally satisfied with the availability and the quality of the health care they received. Conclusion Consistent with the previous study, our data suggest that most cancellations occur because of administrative or structural processes that are potentially preventable. Targeting these processes may help to reduce cancellations for elective surgeries and thereby improve economic efficiency and patient outcomes.

Clinical practice guideline: evidence, recommendations and algorithm for the preoperative optimization of anemia, hyperglycemia and smoking.

Abstract: Preoperative optimization has not been explored comprehensively in the surgical literature, as this responsibility has often been divided among surgery, anesthesia and medicine. We developed an evidence-based clinical practice guideline to summarize existing evidence and present diagnostic and treatment algorithms for use by surgeons caring for patients scheduled to undergo major elective surgery. We focus on 3 common comorbid conditions seen across surgical specialties - anemia, hyperglycemia and smoking - as these conditions increase complication rates in patients undergoing major surgery and can be optimized successfully as soon as 6-8 weeks before surgery. With the ability to address these conditions earlier in the patient journey, surgeons can positively affect patient outcomes. The aim of this guideline is to bring optimization in the preoperative period under the existing umbrella of evidence-based surgical care.

A systematic review of global surgery partnerships and a proposed framework for sustainability.

Abstract: Background Building surgical capacity through global surgery partnerships (GSPs) between high and low- and middle-income countries (LMICs) is a rising global health focus. Our aim was to conduct a systematic review to characterize strategies employed by GSPs to build capacity and promote sustainability and to propose a novel reproducible model for sustainability. Methods We conducted a systematic review according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. We searched PubMed, EMBASE, Medline and African Journals Online to identify all peer-reviewed articles published between 2000 and 2016 that described GSPs between partners from the United States or Canada or both and partners from LMICs. We excluded papers that described nonsurgical GSPs, unilateral GSPs (e.g., humanitarian missions) or military initiatives. Descriptive features were analyzed, with a focus on attributes that promote sustainability. We then proposed criteria for sustainability on the basis of the themes that emerged from our review. Results Our search retrieved 3580 abstracts, which were then independently reviewed by 4 authors. A total of 128 papers (3.6%) met the inclusion criteria. They described GSPs in 68 countries on 5 continents. Among the GSPs, 21.9% demonstrated community engagement and 51.6% included multidisciplinary collaboration. Surgical training or education was provided in 81.3% of GSPs. Although 64.8% of GSPs collected data, only 53.1% reported project-related outcomes. A total of 55.5% had bilateral authorship for publications, and 28.9% had multisource funding. Only 1 GSP fulfilled all 6 of our criteria for sustainability. Conclusion In this systematic review we identified 6 pillars that are indicators of sustainability: community engagement, multidisciplinary collaboration, education and training, outcomes reporting, bilateral authorship and multisource funding. We propose that future GSPs should build on a foundation of bilateral ideas and expertise exchange, that they should have defined and measurable objectives, that they should engage in continuous evaluation of program outcomes and that they should take a thoughtful and transparent approach to sustained capacity building.

Variability in research productivity among Canadian surgical specialties.

Abstract: Background Academic productivity, as measured by number and impact of publications, is central to the career advancement and promotion of academic surgeons. We compared research productivity metrics among specialties and sought factors associated with increased productivity. Methods Academic surgeons were identified through departmental webpages and their scholarly metrics were collected through Scopus in a standardized fashion. We collected total number of documents, h-index, and average number of publications per year in the preceding 5 years. We explored whether presence of a training program, graduate degree, academic rank and size of the clinical group affected productivity metrics. Linear regression was used for multivariable analysis. Results We collected data on 2172 surgeons from 15 separate academic centres across Canada. Wide variability existed in metrics among specialties, with cardiac and neurosurgery being the most productive, and vascular surgery and plastic surgery being the least productive. The average number of publications was 71, and the average h-index was 18.7. The average h-index for cardiac surgery was 25.7 compared with 8.3 for vascular surgery (p < 0.001). Our multivariable model identified academic rank, surgical specialty, graduate degree, presence of a training program, and larger clinical group as being associated with increased academic productivity. Conclusion There is variability in research productivity among Canadian surgical specialties. Cardiac surgery and neurosurgery are productive, whereas vascular surgery and plastic surgery are less productive than other surgical disciplines. Obtaining a research-oriented graduate degree, being part of a larger clinical group, and presence of a training program were all associated with higher productivity, even after adjusting for academic rank and specialty.

The burden of waiting: wait times for pediatric surgical procedures in Quebec and compliance with national benchmarks.

Abstract: Background Wait time information and compliance with national guidelines are limited to a few adult conditions in the province of Quebec. We aimed to assess compliance with Paediatric Canadian Access Targets for Surgery (P-CATS) guidelines and determine the burden incurred due to waiting for 3 common elective surgical conditions (inguinal hernia, cryptorchidism and hypospadias) in a pediatric population. Methods We carried out a population-based retrospective cohort study of randomly selected children residing in Quebec without complex chronic medical conditions, using administrative databases belonging to the Regie de l'assurance maladie du Quebec for the period 2010-2013. Disability-adjusted life years (DALYs) were calculated to measure the burden due to waiting. Multivariate forward regression identified risk factors for compliance with national guidelines. Results Surgical wait time information was assessed for 1515 patients, and specialist referral wait time was assessed for 1389 patients. Compliance with P-CATS benchmarks was 76.6% for seeing a specialist and 60.7% for receiving surgery. Regression analysis identified older age (p < 0.0001) and referring physician specialty (p = 0.001) as risk factors affecting specialist referral wait time target compliance, whereas older age (p = 0.040), referring physician specialty (p = 0.043) and surgeon specialty (p = 0.002) were significant determinants in surgical wait time compliance. The total burden accrued due to waiting beyond benchmarks was 35 DALYs. Conclusion Our results show that provincial compliance rates with wait time benchmarks are still inadequate and need improvement. Patient age and physician specialty were both found to have significant effects on wait time target compliance.

Presentation and survival among patients with colorectal cancer before the age of screening: a systematic review and meta-analysis.

Abstract: Background The incidence of colorectal cancer in North America is rising among patients younger than 50 years. Available data are conflicting regarding presentation and outcomes in this population. This review aimed to synthesize literature regarding young patients with colorectal cancer with respect to patient demographics, disease extent and survival, compared with patients older than 50 years. Methods We searched Medline, Embase, the Cochrane Central Register of Controlled Trials and PubMed for articles published between 1990 and the time of search. Articles comparing North American patients with colorectal cancer younger and older than 50 years were eligible for inclusion. We used a random-effects model to pool odds ratios. Results Eight retrospective studies were eligible for inclusion (n = 790 959). Mean age was 42.6 years (standard deviation [SD] 5.07) in the younger group, and 69.1 years (SD 9.25) in the older group. Young patients were more likely to present with regional (odds ratio [OR] 1.27, 95% confidence interval [CI] 1.16–1.40) and distant disease (OR 1.47, 95%CI 1.30–1.67). Considering patients at all stages of disease, differences in 5-year overall survival (OR 1.54, 95%CI 0.96–2.47) and cancer-specific survival (OR 1.01, 95%CI 0.91–1.13) were not statistically significant between groups. However, when controlling for disease extent, 5-year cancer-specific survival was significantly higher among young patients with local (OR 1.69, 95%CI 1.43–1.99), regional (OR 1.37, 95%CI 1.16–1.63) and distant disease (OR 1.79, 95%CI 1.45–2.21). Conclusion North American patients presenting with colorectal cancer before the age of 50 years are more likely to have advanced disease. Although overall and cancer-specific survival is not significantly different between these groups, younger patients have improved survival when controlling for cancer stage.

Screening for abdominal aortic aneurysms in Canada: 2020 review and position statement of the Canadian Society for Vascular Surgery

Abstract: Abdominal aortic aneurysms (AAAs) remain a major risk to patients, despite level 1 evidence for screening to prevent rupture events and decrease mortality. In 2007, the Canadian Society for Vascular Surgery (CSVS) published a review and position statement for AAA screening in Canada. Since that publication, there have been a number of updates in the published literature affecting screening recommendations. In this paper, we present a review of some of the controversies in the AAA screening literature to help elucidate differences in the various published screening guidelines. This article represents a review of the data and updated recommendations for AAA screening in the Canadian population on behalf of the CSVS. Les anevrismes de l’aorte abdominale (AAA) continuent de poser un risque majeur pour les patients, malgre des donnees probantes de niveau 1 a l’appui du depistage pour prevenir les ruptures et reduire la mortalite. En 2007, la Societe canadienne de chirurgie vasculaire (SCCV) a publie une revue et un enonce de position sur le depistage de l’AAA au Canada. Depuis lors, plusieurs mises a jour ont paru dans la litterature et elles ont un impact sur les recommandations relatives au depistage. Dans le present article, nous presentons une synthese de quelques controverses soulevees dans la litterature sur le depistage de l’AAA afin d’expliquer les differences entre les diverses lignes directrices publiees a ce sujet. Cet article propose au nom de la SCCV une revue des donnees probantes et des recommandations a jour sur le depistage de l’AAA dans la population canadienne.

The effect of the COVID-19 pandemic on bariatric surgery delivery in Edmonton, Alberta: a single-centre experience.

Abstract: Summary Delays in the delivery of bariatric surgery in Canada in the context of the COVID-19 pandemic have not been previously explored. Understanding the potential barriers associated with these delays may help in the implementation and delivery of enhanced bariatric protocols, thereby minimizing health care system burden and improving bariatric delivery. We present the experience of a single high-volume, accredited bariatric program in Edmonton, Alberta, in 2020. Although reductions in bariatric cases occurred during lockdown months, the overall number of cases was comparable to 2019 owing to the adoption of strategies aimed at offsetting the burden of hospital resources. These strategies included optimizing patient selection, implementing bariatric Enhanced Recovery After Surgery protocols, and minimizing unnecessary postoperative investigations to allow most patients to be discharged on postoperative day 1. We advocate to continue optimizing bariatric delivery in the face of the COVID-19 pandemic that so disproportionally affects those with severe obesity and its metabolic complications.

Prioritizing surgery during the COVID-19 pandemic: the Quebec guidelines.

Abstract: Summary In many countries, health care institutions have ramped down nonemergent activities in order to free up hospital and critical care beds in anticipation of a wave of patients with coronavirus disease 2019 (COVID-19). Medical activities were reduced to a minimum, leaving operating rooms to run semiurgent and urgent surgeries only. The status quo of systematically prioritizing resources away from surgical care to patients with COVID-19 may lead to unintended long-term outcomes. We propose a 4-step prioritization system based on resource availability and clinical criteria, as well as supplemental triage criteria for instances where multiple patients have equal claims to priority. The algorithm aims to guide clinicians and decision-makers toward allocating resources to surgical patients while still optimizing pandemic-specific benefits to the population.

Predatory publishing solicitation: a review of a single surgeon's inbox and implications for information technology resources at an organizational level.

Abstract: Summary Over a 6-month period, roughly one-third of emails received in a single surgeon’s email inbox were predatory in nature (i.e., soliciting material for nonexistent journals or conferences). While existing databases (e.g., Beall’s list and The CalTech Library list of questionable conferences) catalogue many fraudulent senders, the list is ever-expanding. The overall cost to health care organizations in terms of wasted bandwidth and financial diversion is extensive, as is confusion for trainees and colleagues. For the sake of fiscal responsibility and the maintenance of scholarly standards, it is incumbent upon organizational information technology departments to continually refine strategies to reduce this adverse impact.

Moving toward better health: exercise practice is associated with improved outcomes after spine surgery in people with degenerative lumbar conditions

Abstract: Background: Recovery and rehabilitation following surgery can take many months. Understanding what patients can do to facilitate recovery would be beneficial for spinal surgeons. This study sought to evaluate the impact of exercise practice, before and after surgery, on long-term outcomes of spine surgery in a robust clinical sample. Methods: This prospective longitudinal cohort study included adult patients undergoing spinal surgery for degenerative spinal conditions. Patients were administered a survey that included preoperative and postoperative exercise practices and the following patient-reported outcome measures: the physical component score (PCS) and mental component score (MCS) of the Medical Outcomes Study 36-Item Short Form Survey (Rand-36), the Oswestry Disability Index (ODI) score, the Numeric Rating Scale (NRS) score for pain and the Patient-Reported Outcome Measurement Information System (PROMIS) Pain Interference Short Form score. Random effects models investigated the relationship of exercise, follow-up time and their interaction in predicting each patient-reported outcome measure over time, with and without sociodemographic covariates. Results: There were 168 patients in the study sample with up to 12 months of follow-up data. Analysis revealed modest significant main effects of exercise on PCS, MCS, ODI and PROMIS scores and main effects of time on all outcomes. The exercise-by-time interaction was significant in predicting the trajectories of the ODI and MCS scores. When full models were adjusted for education and employment status, interaction effects were no longer significant, but exercise main effects remained significant for ODI score. Conclusion: Patients who engage in exercise before and after spine surgery have better mental health and spine-specific recovery trajectories than those who do not. All health care providers should encourage patients to exercise while they are waiting for surgery within preoperative limitations and as soon as they are able after surgery and to continue this over the long term.

The unique impact of COVID-19 on orthopedic surgery residency applicants and program directors in Canada.

Abstract: Summary The COVID-19 pandemic led to the cancellation of visiting medical student electives and in-person residency interviews in Canada. Orthopedic surgery residency programs are now curtailed in their ability to self-promote and select optimal applicants. Online and social media tools should be adopted to promote programs. Faculty, residents and trainees should aim to attend virtual social and program information events. Applicants should make efforts to learn about the programs by attending events and reaching out to residents, and strengthen their application through research and other activities to demonstrate their interest and commitment to the field of orthopedic surgery. These efforts may help avoid the prospect of qualified candidates being unranked by programs or residency positions being unfilled. These difficult circumstances may serve to engender collaboration and cooperation across residency programs and medical schools and lay the foundation for a thriving interconnected ecosystem of future orthopedic surgeons.

Development, manufacture and initial assessment of validity of a 3-dimensional-printed bowel anastomosis simulation training model.

Abstract: Background It is critical that junior residents be given opportunities to practise bowel anastomosis before performing the procedure in patients. Three-dimensional (3D) printing is an affordable way to provide realistic, reusable intestinal simulators. The aim of this study was to test the face and content validity of a 3D-printed simulator for bowel anastomosis. Methods The bowel anastomosis simulator was designed and assembled with the use of desktop 3D printers and silicone solutions. The production cost ranges from $2.67 to $131, depending on which aspects of the model one prefers to include. We incorporated input from a general surgeon regarding design modifications to improve the realism of the model. Nine experts in general surgery (6 staff surgeons and 3 senior residents) were asked to perform an anastomosis with the model and then complete 2 surveys regarding face and content validity. Items were rated on a 5-point Likert scale ranging from 1 (“strongly disagree”) to 5 (“strongly agree”). Results The overall average score for product quality was 3.58, indicating good face validity. The average score for realism (e.g., flexibility and texture of the model) was 3.77. The simulator was rated as being useful for training, with an overall average score of 3.98. In general, the participants agreed that the simulator would be a valuable addition to current simulation-based medical education (average score 4.11). They commented that the model would be improved by adding extra layers to simulate mucosa. Conclusion Experts found the 3D-printed bowel anastomosis simulator to be an appropriate tool for the education of surgical residents, based on the model’s texture, appearance and ability to undergo an anastomosis. This model provides an affordable way for surgical residents to learn bowel anastomosis. Future research will focus on proving educational efficacy, effectiveness and transfer that can be adapted for laparoscopic anastomosis training, hand-sewing and stapling procedures.

From cellular function to global impact: the vascular perspective on COVID-19.

Abstract: Since COVID-19 was declared a pandemic a year ago, our understanding of its effects on the vascular system has slowly evolved. At the cellular level, SARS-CoV-2 - the virus that causes COVID-19 - accesses the vascular endothelium through the angiotensin-converting enzyme 2 (ACE-2) receptor and induces proinflammatory and prothrombotic responses. At the clinical level, these pathways lead to thromboembolic events that affect the pulmonary, extracranial, mesenteric, and lower extremity vessels. At the population level, the presence of vascular risk factors predisposes individuals to more severe forms of COVID-19, whereas the absence of vascular risk factors does not spare patients with COVID-19 from unprecedented rates of stroke, pulmonary embolism and acute limb ischemia. Finally, at the community and global level, the fear of COVID-19, measures taken to limit the spread of SARS-CoV-2 and reallocation of limited hospital resources have led to delayed presentations of severe forms of ischemia, surgery cancellations and missed opportunities for limb salvage. The purpose of this narrative review is to present some of the data on COVID-19, from cellular mechanisms to clinical manifestations, and discuss its impact on the local and global surgical communities from a vascular perspective.

Identification of hypercoagulability with thrombelastography in patients with hip fracture receiving thromboprophylaxis.

Abstract: Background Venous thromboembolism (VTE) is the second most common complication after hip fracture surgery. We used thrombelastography (TEG), a whole-blood, point-of-care test that can provide an overview of the clotting process, to determine the duration of hypercoagulability after hip fracture surgery. Methods In this prospective study, consecutive patients aged 51 years or more with hip fractures (trochanteric region or neck) amenable to surgical treatment who presented to the emergency department were eligible for enrolment. Thrombelastography, including calculation of the coagulation index (CI) (combination of 4 TEG parameters for an overall assessment of coagulation) was performed daily from admission until 5 days postoperatively, and at 2 and 6 weeks postoperatively. All patients received 28 days of thromboprophylaxis. We used single-sample t tests to compare mean maximal amplitude (MA) values (a measure of clot strength) to the hypercoagulable threshold of greater than 65 mm, a predictor of in-hospital VTE. Results Of the 35 patients enrolled, 11 (31%) were hypercoagulable on admission based on an MA value greater than 65 mm, and 29 (83%) were hypercoagulable based on a CI value greater than 3.0; the corresponding values at 6 weeks were 23 (66%) and 34 (97%). All patients had an MA value greater than 65 mm at 2 weeks. Patients demonstrated normal coagulation on admission (mean MA value 62.2 mm [standard deviation (SD) 6.3 mm], p = 0.01) but became significantly hypercoagulable at 2 weeks (mean 71.6 mm [SD 2.6 mm], p < 0.001). There was a trend toward persistent hypercoagulability at 6 weeks (mean MA value 66.2 mm [SD 3.8 mm], p = 0.06). Conclusion More than 50% of patients remained hypercoagulable 6 weeks after fracture despite thromboprophylaxis. Thrombelastography MA thresholds or a change in MA over time may help predict VTE risk; however, further study is needed.

Prolonged surgical time increases the odds of complications following total knee arthroplasty.

Abstract: Background: The aim of this study was to evaluate the influence of operating time on complications and readmission within 30 days of total knee arthroplasty (TKA) and to determine if there were specific time intervals associated with worse outcomes. Methods: The American College of Surgeons’ National Surgical Quality Improvement Program database was used to identify patients 18 years of age and older who underwent TKA between 2006 and 2017, using procedural codes. Patient demographic characteristics, operation length and 30-day major and minor complication and readmission rates were captured. We used multivariable regression to determine if the rates of complications and readmission differed depending on the length of the operation, while adjusting for relevant covariables. Results: A total of 263 174 patients who underwent TKA were identified from the database. Their mean age was 66.8 (standard deviation 9.7) years. Within 30 days of the index procedure, 5700 patients (2.2%) experienced a major complication, 5185 (2.0%) experienced a minor complication and 7730 (3.1% of 249 746 patients from 2011 to 2017) were readmitted. Mean operation length was 91.7 minutes (range 30–240 min). After adjustment for relevant covariables, an operating time of 90 minutes or more was a significant predictor of major and minor complications as well as readmission. There was no difference in the odds of complications or readmission for operations lasting 30–49, 50–69 or 70–89 minutes (p > 0.05). Conclusion: Our data suggest that operating times of 90 minutes or more may be associated with an increase in the 30-day odds of complications and readmission following TKA. Further studies are needed to confirm our findings and determine the influence of surgical time on outcomes when there is increased case complexity.

Effect of preoperative long-term opioid therapy on patient outcomes after total knee arthroplasty: an analysis of multicentre population-based administrative data.

Abstract: Background Up to 40% of patients are receiving opioids at the time of total knee arthroplasty (TKA) in the United States despite evidence suggesting opioids are ineffective for pain associated with arthritis and have substantial risks. Our primary objective was to determine whether preoperative opioid users had worse knee pain and physical function outcomes 12 months after TKA than patients who were opioid-naive preoperatively; our secondary objective was to determine the prevalence of opioid use before and after TKA in Alberta, Canada. Methods In this retrospective analysis of population-based data, we identified adult patients who underwent TKA between 2013 and 2015 in Alberta. We used multivariable linear regression to examine the association between preoperative opioid use and Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) pain and physical function scores 12 months after TKA, adjusting for potentially confounding variables. Results Of the 1907 patients, 592 (31.0%) had at least 1 opioid dispensed before TKA, and 124 (6.5%) were classified as long-term opioid users. Long-term opioid users had worse adjusted WOMAC pain and physical function scores 12 months after TKA than patients who were opioid-naive preoperatively (pain score β = 7.7, 95% confidence interval [CI] 4.0 to 11.6; physical function score β = 7.8, 95% CI 4.0 to 11.6; p < 0.001 for both). The majority (89 ([71.8%]) of patients who were long-term opioid users preoperatively were dispensed opioids 180-360 days after TKA, compared to 158 (12.0%) patients who were opioid-naive preoperatively. Conclusion A substantial number of patients were dispensed opioids before and after TKA, and patients who received opioids preoperatively had worse adjusted pain and functional outcome scores 12 months after TKA than patients who were opioidnaive preoperatively. These results suggest that patients prescribed opioids preoperatively should be counselled judiciously regarding expected outcomes after TKA.

COVID-19: pivoting from in-person to virtual orthopedic surgical evaluation.

Abstract: In March 2020, the coronavirus disease 2019 (COVID-19) pandemic necessitated substantial downscaling of office-based orthopedic surgical practice. To address the ongoing need for patient assessment, surgical practices pivoted from in-person appointments to a virtual platform. Patients (n = 1823), contacted by telephone (82%) or by video (18%), judged this new approach as excellent or very good in 71% of telephone contacts, and in 84% of those successfully inter-viewed by video. For future meetings, 4 of 5 patients preferred virtual rather than in-person contact. Patients whose round-trip travel time for in-person appointments was under 2 hours were twice as likely to prefer future in-person contact as those more than 2 hours away. Patients who had far to travel or who used walking aids were more likely to travel accompanied. Acknowledging that patients value both videoconferencing and telephone contact, surgeons should offer virtual visits as an alternative to in-person assessments. Patients need to have access to reliable Internet. Finally, telemedicine is environmentally friendly.

Longitudinal survival trends of patients with cancer with surgically managed appendicular metastatic bone disease: systematic review.

Abstract: Background: Advances in systemic cancer therapies have improved survival for patients with metastatic carcinoma; however, it is unknown whether these advances have translated to improved survival for patients with appendicular metastatic bone disease (A-MBD) after orthopedic interventions. We conducted a study to evaluate the trend in overall survival for patients who underwent orthopedic surgery for A-MBD between 1968 and 2018. Methods: A systematic search of Embase and Medline to identify studies published since 1968 evaluating patients treated with orthopedic surgery for A-MBD was conducted for a previously published scoping review. We used a meta-regression model to assess the longitudinal trends in 1-, 2- and 5-year overall survival between 1968 and 2018. The midpoint year of patient inclusion for each study was used for analysis. We categorized primary tumour types into a tumour severity score according to prognosis for a further meta-regression analysis. Results: Of the 5747 studies identified, 103 were retained for analysis. Meta-regression analysis showed no significant effect of midpoint study year on survival across all time points. There was no effect of the weighted average of tumour severity scores for each study on 1-year survival over time. Conclusion: There was no significant improvement in overall survival between 1968 and 2018 for patients with A-MBD who underwent orthopedic surgery. Orthopedic intervention remains a poor prognostic variable for patients with MBD. This finding highlights the need for improved collection of prospective data in this population to identify patients with favourable survival outcomes who may benefit from personalized oncologic surgical interventions.

The effect of daily probiotics on the incidence and severity of necrotizing enterocolitis in infants with very low birth weight.

Abstract: Background: Necrotizing enterocolitis remains a leading cause of morbidity and mortality in premature infants. The role of prophylactic probiotics in its prevention is unclear. This study evaluates the effect of routine probiotics on the incidence and severity of necrotizing enterocolitis in infants with very low birth weight in the neonatal intensive care unit. Methods: This retrospective cohort study compared infants cared for at a single institution before and after implementation of routine probiotic administration (2014– 2018). Babies born after July 2016 received probiotics containing Bifidobacterium and Lactobacillus daily until 35 weeks corrected gestational age. Baseline characteristics, necrotizing enterocolitis incidence and severity, infections, mortality, and length of stay were compared between groups. Results: Of the 665 infants included in the study, 310 received probiotics and 355 did not. The 2 groups did not differ with regard to gestational age, birth anthropometrics, mode of delivery, comorbidities, and type of enteral feed. The incidence of necrotizing enterocolitis (Bell’s stage 2 of 3) was similar between groups (4% v. 5%, p = 0.35), as was its severity (p = 0.10). In addition, there were no significant differences in mortality and length of stay between the groups. Significantly fewer infants receiving probiotics developed infections (27% v. 34%, p = 0.046), with the rate of urinary tract infections having the largest reduction. Conclusion: The routine use of Bifidobacterium and Lactobacillus probiotics in infants with very low birth weight did not significantly affect the incidence and severity of necrotizing enterocolitis. However, the use of probiotics was associated with fewer overall infections.

Urinary catheter use in patients with hip fracture: Are current guidelines appropriate? A retrospective review.

Abstract: Background: Guidelines for urinary catheterization in patients with hip fracture recommend limiting catheter use and using intermittent catheterization preferentially to avoid complications such as urinary tract infection (UTI) and postoperative urinary retention (POUR). We aimed to compare current practices to clinical guidelines, describe the incidence of POUR and UTI, and determine factors that increase the risk of these complications. Methods: We retrospectively reviewed the charts of patients with hip fracture who presented to a single large tertiary care centre in southeastern Ontario between November 2015 and October 2017. Data collected included comorbidities, catheter use and length of stay. We compared catheter use to guidelines, and investigated the incidence of and risk factors for POUR and UTI. Results: We reviewed the charts of 583 patients, of whom 450 (77.2%) were treated with a catheter, primarily indwelling (416 [92.4%]). Postoperative urinary retention developed in 98 patients (16.8%); however, it did not affect length of stay (p = 0.2). Patients with indwelling catheters for more than 24 hours after surgery had a higher incidence of POUR than those who had their catheter removed before 24 hours (65/330 [19.7%] v. 10/98 [10.2%]) (odds ratio [OR] 2.2, 95% confidence interval [CI] 1.06–4.38). A UTI developed postoperatively in 62 patients (10.6%). Catheter use was associated with a 6.6-fold increased risk of UTI (OR 6.6, 95% CI 2.03–21.4). Patients with indwelling catheters did not have a significantly higher incidence of UTI than those with intermittent catheterization (57/416 [13.7%] v. 2/34 [5.9%]) (p = 0.2). Patients who developed a UTI had significantly longer catheter use than patients who did not (p Conclusion: Indwelling catheters were used frequently, which suggests low compliance with clinical guidelines. Longer duration of catheter use led to higher rates of UTI and POUR. Further investigation of the reasons for the common use of indwelling rather than intermittent catheterization is needed.

Expertise-based design in surgical trials: a narrative review.

Abstract: Randomized controlled trials (RCTs) are the most robust study design for evaluating the safety and efficacy of a therapeutic intervention. However, their internal validity are at risk when evaluating surgical interventions. This review summarizes existing expertise- based trials in surgery and related methodological concepts to guide surgeons performing this work. We provide caseloads required to reach the learning curve for various surgical interventions and report criteria for expertise from published and unpublished expertise-based trials. In addition, we review design and implementation concepts of expertise-based trials, including recruitment of surgeons, crossover, ethics, generalizability, sample size and definitions for learning curve. Several RCTs have used an expertise-based design. We found that the majority of definitions used for expertise were vague, heterogeneous, and inconsistent across trials evaluating the same surgical intervention. Statistical methods exist to adjust for the learning curve; however, there is limited guidance. We developed the following criteria for surgical expertise for future trials: 1) decide on the proxy to be used for the learning curve, and 2) assess eligible surgeons by comparing their performance to the previously defined expertise criteria.

Morbidity associated with the use of oxaliplatin versus mitomycin C in hyperthermic intraperitoneal chemotherapy (HIPEC) for peritoneal carcinomatosis of colorectal or appendiceal origin: a multi-institutional comparative study.

Abstract: Background The raw costs of mitomycin C (MMC) and oxaliplatin for hyperthermic intraperitoneal chemotherapy (HIPEC) differ substantially. We sought to compare the morbidity and toxicity profiles associated with the use of oxaliplatin and MMC in patients undergoing cytoreductive surgery (CRS) and HIPEC for peritoneal carcinomatosis (PC) of colorectal or appendiceal origin, to evaluate whether the costeffectiveness of these 2 agents should dictate drug choice. Methods We conducted a retrospective multi-institutional study of all patients with PC of colorectal or appendiceal origin treated with CRS-HIPEC using MMC or oxaliplatin from 2010 to 2015. Demographic, perioperative, morbidity, toxicity and cost data were compared between the 2 treatment groups and between cancer-origin subgroups. Results Forty-two patients treated with MMC and 76 treated with oxaliplatin were included in the study. Baseline demographic and tumour characteristics were comparable in the 2 groups, except that the patients treated with MMC had higher Charlson Comorbidity Index scores. The MMC group had a higher rate of cancer of colorectal origin (76.2% v. 57.9%, p = 0.047) and longer operative times (553 v. 320 min, p < 0.001). In the subgroup of patients whose cancer was of colorectal origin, patients treated with MMC had a higher transfusion rate (50.0% v. 28.6%, p = 0.023) and lower postoperative baseline hemoglobin level (100 v. 119 g/L, p = 0.002) than those treated with oxaliplatin. There was no difference in hematologic toxicity scores after controlling for postoperative anemia. There was no difference in the rates of major complications and 90-day mortality. However, MMC was less costly than oxaliplatin ($724 v. $8928). Conclusion MMC and oxaliplatin are both suitable agents for HIPEC and are associated with comparable morbidity and toxicity profiles, regardless of cancer origin. Thus, we propose that cost-effectiveness should ultimately dictate drug selection.

Safety and efficacy of a strategy of vitamin K antagonist reversal with prothrombin complex concentrates compared to vitamin K in patients with hip fracture.

Abstract: Background Increased preoperative delay in patients with hip fractures may be responsible for increased morbidity and mortality. We hypothesized that a strategy of reversal of vitamin K antagonist (VKA) by prothrombin complexes concentrates (PCCs), as compared to vitamin K, is safe and reduces preoperative delay and hospital length of stay (LOS). Methods In this pilot study, we reviewed the records of patients admitted to a university-affiliated hospital for hip fracture between Jan. 1, 2012, and Dec. 31, 2016, who were taking VKA. Patients were stratified according to reversal strategy (vitamin K v. PCC). Adverse effects, time to surgery, LOS and mortality were collected from the electronic medical record and were compared between the 2 study groups and a control group not treated with VKA. Results A total of 141 patients were included in the study: 65 in the vitamin K group, 26 in the PCC group and 50 in the control group. The median preoperative delay in the PCC group (20 h [interquartile range (IQR)] 13-25 h]) and the control group (20 h [IQR 15-33 h]) was lower than that in the vitamin K group (45 h [IQR 31-52 h]) (p < 0.001). Patients in the PCC group had a shorter median hospital LOS than those in the vitamin K group (6 d [IQR 4-9 d] v. 8 d [IQR 6-11 d], p < 0.05). No difference was observed in the proportion of patients who received a red blood cell transfusion, or had thrombotic or hemorrhagic complications. No difference in mortality at 12 months was observed between the groups. Conclusion In patients with hip fracture, the use of PCCs as compared to vitamin K to reverse the effect of VKA significantly reduced preoperative delay and hospital LOS, and was not associated with an increase in the rates of thrombotic or hemorrhagic complications. Prospective studies involving a greater number of patients are required to confirm these promising results.

Point-of-care ultrasonography for the diagnosis of testicular torsion: a practical resident curriculum.

Abstract: Background Prompt Doppler ultrasonography to aid in diagnosis is often key to managing testicular torsion, but there may be delays in access; a faster, more widely available alternative is point-of-care ultrasonography (POCUS). The purpose of this study was to develop and evaluate a scrotal POCUS curriculum for urology and emergency medicine residents. Methods Content experts in urology, emergency medicine and diagnostic imaging collaborated in a modified Delphi method to design a practical didactic curriculum for scrotal POCUS for the identification of testicular torsion. Training included 3 online video teaching modules and a 1-hour hands-on teaching session with standardized adult patients. We evaluated participants' competency in scrotal POCUS using a validated scale. We assessed participants' knowledge, comfort and confidence in performing scrotal POCUS before and after the intervention and at 3 months. Results Twenty-four urology (n = 12) and emergency medicine (n = 12) residents participated in the curriculum. After hands-on practice, 23 participants (96%) were deemed competent at scrotal POCUS. Pre-post testing showed significant improvement in knowledge (mean score 63% v. 80%, p < 0.001), comfort (mean Likert score 0.6 v. 3.6, p < 0.001) and confidence (mean Likert score 1.0 v. 2.1, p < 0.001) after the intervention. These effects were maintained at the 3-month assessment. Conclusion The scrotal POCUS curriculum was effective and acceptable to both urology and emergency medicine residents. The findings suggest that scrotal POCUS can be learned effectively through a short hands-on session and didactic instruction.

Evaluating the efficacy of self-study videos for the surgery clerkship rotation: an innovative project in undergraduate surgical education.

Abstract: Background Educational videos have become valuable resources and can address some of the pitfalls of traditional learning. To ensure clerkship students have adequate exposure to curriculum objectives, a series of objective-aligned self-directed learning video podcasts covering core surgical concepts were developed by medical students and surgical residents. The objective of the study was to evaluate the efficacy of the video podcasts in the surgery clerkship rotation. Methods Nineteen video podcasts were created, housed at www.surgicaleducationportal.com, and distributed to third-year medical students completing their surgical clerkship. A 10-question multiple-choice quiz was administered before and after students viewed each video, and they were also asked to complete a satisfaction survey. Results A total of 302 paired pretests and posttests were completed. There was a mean increase of 2.7 points in posttest scores compared with pretest scores (p < 0.001). On a Likert scale from 1 to 5, with 5 being excellent, students rated the usefulness of the videos as 4.3, the quality of the content as 4.3 and the quality of the video as 4.2. Ninety-eight percent of students would recommend these videos to their classmates. Conclusion Video podcasts are an effective modality for engaging medical students and may improve standardization of learning during their surgical clerkship.