Publications by authors named "Bigam D"

Background: Total pancreatectomy (TP) offers a surgical option for refractory pancreatitis, yet confers substantial long-term morbidity associated with resultant diabetes. While total pancreatectomy with islet autotransplantation (TPIAT) offers an intuitive solution, data evaluating its safety have been limited to single-center studies. The aim of this study is to evaluate whether the addition of islet autotransplantation to TP confers additional post-operative morbidity within the 30-day post-operative period.

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Background: Recurrent disease after liver transplant is well recognized for many diseases. Metabolic dysfunction-associated steatotic liver disease (MASLD) and steatohepatitis (MASH) are leading indications for liver transplant, and there is scarce knowledge about recurrence-related end outcomes such as retransplant and mortality. This project aims to assess the proportion of patients transplanted for MASH who develop recurrent disease and adverse clinical outcomes.

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Backgrounds/aims: Pancreatic texture is difficult to predict without palpation. Soft pancreatic texture is associated with increased post-operative complications, including postoperative pancreatic fistula (POPF), cardiac, and respiratory complications. We aimed to develop a calculator predicting pancreatic texture using patient factors and to illustrate complications from soft pancreatic texture following pancreaticoduodenectomy.

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Little is known about the skeletal muscle characteristics (fibre type proportion and size, location of nuclei, presence of fat infiltration) in children with liver disease with radiologically determined myopenia (low muscle mass). During liver transplantation (LTx) surgery, biopsies from the rectus abdominis muscle were collected. Muscle fibre types (I, I/IIA, IIA, IIA/X, IIX) and CSA index (µm/m2) were determined using immunofluorescence staining.

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Background: Efforts to preoperatively risk stratify and optimize patients before pancreaticoduodenectomy continue to improve outcomes. This study aims to determine the impact of hypoalbuminemia on outcomes following pancreaticoduodenectomy and outline optimal hypoalbuminemia cut-off values in this population.

Methods: The ACS-NSQIP (2016-2021) database was used to extract patients who underwent pancreaticoduodenectomy, comparing those with hypoalbuminemia (< 3.

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Background: Limited information is available regarding outcomes of islet cell isolation (ICI) and transplantation (ITx) using medical assistance in dying (MAiD) donors. We aimed to assess the feasibility and outcomes of ICI and ITx in MAiD donors.

Methods: ICI and ITx from MAiD were compared with donation after circulatory death (DCD) type III between 2016 and 2023.

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Background: Biliary obstruction before liver resection is a known risk factor for post-operative complications. The aim of this study was to determine the impact of persistent hyperbilirubinemia following preoperative biliary drainage before liver resection.

Methods: The ACS-NSQIP (2016-2021) database was used to extract patients with cholangiocarcinoma who underwent anatomic liver resection with preoperative biliary drainage comparing those with persistent hyperbilirubinemia (> 1.

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Article Synopsis
  • Hepatic artery complications (HACs) after pediatric liver transplantation can lead to significant health issues, and this study aims to understand how common they are, how they are managed, and what outcomes arise from these complications.
  • The research utilizes the international HEPATIC Registry, collecting data on pediatric patients under 18 who experienced HAC within the last 20 years, focusing on survival rates and treatment success.
  • Ethical approval will be obtained from all participating sites, and findings will be shared at conferences and in academic journals, with the study registered on ClinicalTrials.gov (NCT05818644).
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Background: Health care organizations implement electronic health record (EHR) systems with the expectation of improved patient care and enhanced provider performance. However, while these technologies hold the potential to create improved care and system efficiencies, they can also lead to unintended negative consequences, such as patient safety issues, communication problems, and provider burnout.

Objective: This study aims to document metrics related to the In Basket communication hub (time in In Basket per day, time in In Basket per appointment, In Basket messages received per day, and turnaround time) of the EHR system implemented by Alberta Health Services, the province-wide health delivery system called Connect Care (Epic Systems).

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BACKGROUND Ischemia/reperfusion injury (IRI) is an inherent problem in organ transplantation, owing to the obligate period of ischemia that organs must endure. Cyclosporine A (CsA), though better know as an immunosuppressant, has been shown to mitigate warm IRI in a variety of organ types, including the liver. However, there is little evidence for CsA in preventing hepatic IRI in the transplant setting.

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Background: In solid organ transplantation, HLA matching between donor and recipient is associated with superior outcomes. In islet transplantation, an intervention for Type 1 diabetes, HLA matching between donor and recipient is not performed as part of allocation. Susceptibility to Type 1 diabetes is associated with the presence of certain HLA types.

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Objective: The objective of this study was to determine the prognostic relevance, clinical characteristics, and 30-day outcomes associated with myocardial injury after noncardiac surgery (MINS) in major general surgery patients.

Background: MINS has been independently associated with 30-day mortality after noncardiac surgery. The characteristics and prognostic importance of MINS in major general surgical patients have not been described.

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Normothermic machine perfusion (NMP) has emerged as a valuable tool in the preservation of liver allografts before transplantation. Randomized trials have shown that replacing static cold storage (SCS) with NMP reduces allograft injury and improves graft utilization. The University of Alberta's liver transplant program was one of the early adopters of NMP in North America.

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Background: Pancreatic cystic lesions (PCLs) are common, with several guidelines providing surveillance recommendations. The Canadian Association of Radiologists published surveillance guidelines (CARGs) intended to provide simplified, cost-effective and safe recommendations. This study aimed to evaluate cost savings of CARGs compared to other North American guidelines including American Gastroenterology Association guidelines (AGAG) and American College of Radiology guidelines (ACRG), and to evaluate CARG safety and uptake.

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The coronavirus disease 2019 (COVID-19) pandemic created an unprecedented challenge for healthcare, and the world continues to struggle in recovering from its aftermath. COVID-19 has been clearly linked to hypercoagulable states and can lead to end-organ ischemia, morbidity, and mortality. Immunosuppressed solid organ transplant recipients represent a highly vulnerable population for the increased risk of complications and mortality.

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The proportion of general surgeons with graduate degrees in Canada is increasing. We sought to evaluate the types of graduate degree held by surgeons in Canada, and whether differences in publication capacity exist. We evaluated all general surgeons working at English-speaking Canadian academic hospitals to determine the types of degrees achieved, changes over time and research output associated with each degree.

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Background: In Africa, pediatric liver transplantation (PLT) is currently only performed in Egypt and South Africa, leaving those who require treatment in Kenya to travel abroad. The aim of this study was to determine whether sufficient capacity and need exists in Kenya to establish a safe and sustainable PLT program.

Methods: A descriptive analysis of the intensive care unit (ICU) beds, surgical workforce, current hepatobiliary volume, and estimated prevalence of pediatric liver disease (PLD) was conducted across 17 hospitals in Kenya between July and September 2020.

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Objective: To provide the largest single-center analysis of islet (ITx) and pancreas (PTx) transplantation.

Summary Background Data: Studies describing long-term outcomes with ITx and PTx are scarce.

Methods: We included adults undergoing ITx (n=266) and PTx (n=146) at the University of Alberta from January 1999 to October 2019.

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Background: Hepato-pancreatico-biliary (HPB) patients experience competing risk of venous thromboembolism (VTE) and bleeding. We sought to evaluate the effect of anti-Xa levels on VTE and bleeding, and to characterize factors associated with subprophylaxis.

Methods: This prospective cohort study evaluated adult HPB surgical patients; cohorts were described by anti-Xa levels as subprophylactic (<0.

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Acute liver failure (ALF) is a rare but devastating disease associated with substantial morbidity and a mortality rate of almost 45%. Medical treatments, apart from supportive care, are limited and liver transplantation may be the only rescue option. Large animal models, which most closely represent human disease, can be logistically and technically cumbersome, expensive and pose ethical challenges.

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Background: C-peptide levels are a key measure of beta-cell mass following islet transplantation, but threshold values required to achieve clinically relevant patient-centered outcomes are not yet established.

Methods: We conducted a cross-sectional retrospective cohort study evaluating patients undergoing islet transplantation at a single center from 1999 to 2018. Cohorts included patients achieving insulin independence without hypoglycemia, those with insulin dependence without hypoglycemia, and those with recurrent symptomatic hypoglycemia.

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Background: Preliminary studies show promise for extrahepatic islet transplantation (ITx). However, clinical comparisons with intraportal ITx outcomes remain limited.

Methods: This single-center cohort study evaluates patients receiving extrahepatic or intraportal ITx between 1999 and 2018.

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