Publications by authors named "Oliver Varban"

Background: Same-day discharge after sleeve gastrectomy (SDDSG) is being performed in select patient populations with increased regularity since 2020.

Objectives: To evaluate the impact of SDDSG on emergency department (ED) visits.

Setting: Academic and private practice bariatric surgery programs participating in a statewide quality improvement collaborative.

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Article Synopsis
  • Early reoperation rates after sleeve gastrectomy (SG) and Roux-en-Y gastric bypass (RYGB) are low, but approximately 32% of reoperations after SG and 24% after RYGB happen within 24 hours due to complications like hemorrhage.
  • Factors such as older age, hypertension, and liver disease increase the risk of early reoperation, particularly in SG patients, and longer surgery times are a common factor for both procedures.
  • The findings suggest that patients with significant comorbidities should be carefully evaluated as candidates for same-day surgery due to the heightened risks associated with potential early complications.
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Background: Bariatric surgery is underutilized as a treatment for metabolic disease and its associated comorbidities. While social support is known to play a crucial role in outcomes following bariatric surgery, little is known about the role of social support prior to surgery, which may impact preparedness for and willingness to undergo surgery. The study's objective was to examine the role of informal social support prior to bariatric surgery, the types of support received, and patient attitudes toward different demonstrations of support.

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Background: Clinical care pathways help guide and provide structure to clinicians and providers to improve healthcare delivery and quality. The Quality Improvement and Patient Safety Committee (QIPS) of the American Society for Metabolic and Bariatric Surgery (ASMBS) has previously published care pathways for the performance of laparoscopic sleeve gastrectomy (LSG) and pre-operative care of patients undergoing Roux-en-Y gastric bypass (RYGB).

Objective: This current RYGB care pathway was created to address intraoperative care, defined as care occurring on the day of surgery from the preoperative holding area, through the operating room, and into the postanesthesia care unit (PACU).

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Background: Aborted bariatric surgeries are an undesirable experience for patients as they are subjected to potential physical harm and emotional distress. A thorough investigation of aborted bariatric surgeries has not been previously reported. This information may allow the discovery of opportunities to mitigate the risk of aborting some bariatric operations.

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Introduction: Sex as a biologic variable remains largely understudied, even for the most commonly performed operations. The most effective treatment for obesity and obesity-associated comorbidities is bariatric surgery. There are limited data to describe potential differences in outcomes between male and female patients, particularly with regards to weight loss.

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Background: Sleeve gastrectomy (SG) is the most commonly performed weight loss operation, and its 2 most common complications are postoperative reflux and weight recurrence. There is limited evidence to guide decision-making in treating these conditions.

Objectives: To determine the efficacy of conversion of SG to Roux-en-Y gastric bypass (RYGB) for GERD management and weight loss.

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Article Synopsis
  • The study investigates how preexisting Non-Alcoholic Fatty Liver Disease (NAFLD) affects weight loss outcomes after bariatric surgery over a period of up to 5 years.
  • Based on data from the Michigan Bariatric Surgery Cohort, it was found that patients with preexisting NAFLD experienced significantly lower weight loss compared to those without it.
  • The research highlights the need for ongoing monitoring of NAFLD in patients post-surgery, as it may persist or recur in some individuals.
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Background: Although patients with lower socioeconomic status are at higher risk of obesity, bariatric surgery utilization among patients with Medicaid is low and may be due to program-specific variation in access. Our goal was to compare bariatric surgery programs by percentage of Medicaid cases and to determine if variation in distribution of patients with Medicaid could be linked to adverse outcomes.

Methods: Using a state-wide bariatric-specific data registry that included 43 programs performing 97,207 cases between 2006 and 2020, we identified all patients with Medicaid insurance (n = 4780, 4.

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Introduction: Technical variation exists when performing the gastrojejunostomy during Roux-en-Y gastric bypass (RYGB). However, it is unclear whether changing technique results in improved outcomes or patient harm.

Methods: Surgeons participating in a state-wide bariatric surgery quality collaborative who completed a survey on how they perform a typical RYGB in 2011 and again in 2021 were included in the analysis (n = 31).

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  • Many people who have obesity and are getting surgery for it also struggle with depression.
  • In a study of over 44,000 patients, it was found that about 31% had some level of depression before their surgery.
  • Patients with severe depression tended to stay in the hospital longer and used substances like alcohol, cigarettes, and drugs more often compared to those without depression.
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Background: Despite increasing marijuana use nationwide, there are limited data on implications of marijuana use on bariatric surgery outcomes.

Objective: We investigated associations between marijuana use and bariatric surgery outcomes.

Setting: Multicenter statewide study utilizing data from the Michigan Bariatric Surgery Collaborative, a payor-funded consortium including over 40 hospitals and 80 surgeons performing bariatric surgery statewide.

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Objective: For patients with obesity and diabetes, bariatric surgery can lead to the remission of both diseases. However, the possible impact of diabetes on the magnitude of weight loss outcomes after bariatric surgery has not been precisely quantified.

Research Design And Methods: Data from Michigan Bariatric Surgery Cohort (MI-BASiC) was extracted to examine the effect of baseline diabetes on weight loss outcomes.

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Background: Metabolic surgery is the most effective treatment for obesity and may improve obesity-related pain syndromes. However, the effect of surgery on the persistent use of opioids in patients with a history of prior opioid use remains unclear.

Objective: To determine the effect of metabolic surgery on opioid use behaviors in patients with prior opioid use.

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Background: Concurrent hiatal hernia repair (HHR) during laparoscopic sleeve gastrectomy (LSG) may improve gastroesophageal reflux disease (GERD) symptoms. However, patient-reported outcomes are limited, and the influence of surgeon technique remains unclear.

Objectives: To assess patient-reported GERD severity before and after LSG with and without concomitant HHR.

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Context: Weight loss after bariatric surgery can be accurately predicted using an outcomes calculator; however, outliers exist that do not meet the 1 year post-surgery weight projections.

Objective: Our goal was to determine how soon after surgery these outliers can be identified.

Design: We conducted a retrospective cohort study.

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Background: Portomesenteric vein thrombosis (PVT) is a rare complication following bariatric surgery but can result in severe morbidity as well as death.

Objective: Identification of risk factors for PVT to facilitate targeted management strategies to reduce incidence.

Setting: Prospective, statewide bariatric-specific clinical registry.

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Introduction: Repairing a hiatal hernia at the time of laparoscopic sleeve gastrectomy (SG) can reduce or even prevent gastroesophageal reflux disease (GERD) symptoms in the post-operative period. Several different hiatal hernia repair techniques have been described but their impact on GERD symptoms after SG is unclear.

Methods: Surgeons (n = 74) participating in a statewide quality collaborative were surveyed on their typical technique for repair of hiatal hernias during SG.

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Background: Both gastric bypass and sleeve gastrectomy can induce diabetes remission. However, deciding which procedure to perform is challenging, because remission rates and morbidity can vary, depending on patient factors as well as disease severity.

Study Design: Using a statewide bariatric-specific data registry, we evaluated all patients undergoing sleeve gastrectomy and gastric bypass between 2006 and 2019 who reported taking either oral diabetic medication alone or who were on insulin before surgery and who also had 1-year follow-up (n=11,664).

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Background: Although bariatric surgery is the most effective treatment for obesity and weight-related comorbid diseases, utilization rates are disproportionately low among non-white patients. We sought to understand if variation in baseline characteristics or access to care exists between white and non-white patients.

Methods: Using a statewide bariatric-specific data registry, we evaluated all patients who underwent bariatric surgery between 2006 and 2020 and completed a preoperative baseline questionnaire, which included a question about self-identification of race.

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