Publications by authors named "George Q Zhang"

Background: Asian American (AsAm) representation is lacking in conversations surrounding cultural humility in healthcare. We aimed to investigate US medical student perspectives on AsAm patient inclusion in cultural humility training in medical education.

Methods: This qualitative study analyzed free-text responses to an optional, open-ended question presented at the conclusion of an online survey assessing medical student experiences with and perceptions regarding AsAm patients in their medical education.

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Anticipating a growing need for health care during the COVID-19 pandemic, the Centers for Medicare and Medicaid Services expanded telemedicine coverage in the United States on March 6, 2020. In this study we used roughly thirty million Medicare fee-for-service claims to quantify outpatient telemedicine use before and after the Medicare telemedicine coverage waiver and to examine the association of telemedicine use with the Area Deprivation Index, a comprehensive measure of neighborhood socioeconomic disadvantage. Before the waiver, 0.

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Background: Carotid artery stenting (CAS), including both transfemoral carotid artery stenting (TFCAS) and transcarotid artery revascularization (TCAR), reimbursement has been limited to high-risk patients by the Centers for Medicare & Medicaid Services (CMS) since 2005. We aimed to assess the association of CMS high-risk status with perioperative outcomes for carotid endarterectomy (CEA), TFCAS, and TCAR.

Methods: We performed a retrospective review of all Vascular Quality Initiative patients who underwent carotid revascularization between 2015 and 2020.

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Background: The worsening opioid epidemic has led to an increased number of surgical patients with chronic preoperative opioid use. However, the impact of opioids on perioperative outcomes has yet to be fully elucidated. The purpose of this study was to assess the association between preoperative opioid dose and surgical outcomes among colectomy patients.

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Background: Preoperative vein mapping before arteriovenous fistula (AVF) or arteriovenous graft (AVG) placement has been debated as a possible method of improving hemodialysis access outcomes for patients. However, high-quality national studies that have addressed this relationship are lacking. Thus, we assessed the association of preoperative vein mapping with hemodialysis access configuration and outcomes.

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Purpose: There has been a noted reluctance to offer laparoscopic surgery to Crohn's Disease patients due to the potential risks, and high rate, of converting the procedure to open. The purpose of this study was to compare clinical outcomes between Crohn's Disease patients undergoing a planned open colectomy, to those undergoing a laparoscopic colectomy that was converted to open.

Methods: Crohn's Disease patients undergoing an elective colectomy were identified using the ACS-NSQIP database (2012-2019).

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Background: Robotic surgery is attractive for resection of low rectal cancer due to greater dexterity and visualization, but its benefit is poorly understood. We aimed to determine if operative approach impacts radial margin positivity (RMP) and postoperative outcomes among patients undergoing abdominoperineal resection (APR).

Methods: This was a retrospective cohort study of patients from the National Surgical Quality Improvement Program who underwent APR for low rectal cancer from 2016 to 2019.

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Aim: Depression is a prevalent disorder that is associated with adverse health outcomes, but an understanding of its effect in colorectal surgery remains limited. The purpose of this study was to examine the impact of history of depression among patients undergoing colectomy.

Method: United States patients from Marketscan (2010-2017) who underwent colectomy were included and stratified by whether they had a history of depression within the past year, defined as (1) a diagnosis of depression during the index admission, (2) a diagnosis of depression during any inpatient or (3) outpatient admission within the year, and/or (4) a pharmacy claim for an antidepressant within the year.

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Background: Preoperative steroid use has been associated with worse surgical outcomes. The purpose of this study was to determine whether laparoscopic surgery reduces the risk of septic shock/sepsis among ulcerative colitis patients with preoperative chronic steroid use.

Methods: Patients with ulcerative colitis undergoing a total abdominal colectomy were identified from the American College of Surgeons National Surgical Quality Improvement Program (NSQIP) database (2005-2019).

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Objective: Anatomic grading systems have historically been poor predictors of patency after endovascular tibial interventions. The Global Vascular Guidelines proposed a new Global Anatomic Staging System (GLASS) to estimate one-year limb-based patency (LBP). The purpose of this study was to determine the association of GLASS with LBP following endovascular tibial interventions.

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Objective: Socioeconomic disadvantage is a known predictor of adverse outcomes and amputation in patients with diabetes. However, its association with outcomes after major amputation has not been described. Here, we aimed to determine the association of geographic socioeconomic disadvantage with 30-day readmission and 1-year reamputation rates among patients with diabetes undergoing major amputation.

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Background: Rectal cancer treatment is often multimodal, comprising of surgery, chemotherapy, and radiotherapy. However, the impact of coordination between these modalities is currently unknown. We aimed to assess whether delivery of nonsurgical therapy within same facility as surgery impacts survival in patients with rectal cancer.

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Background: Depression has been linked to increased morbidity and mortality in patients after surgery. The purpose of this study is to investigate the impact of documented depression diagnosis on in-hospital postoperative outcomes of patients undergoing colorectal surgery.

Materials And Methods: Patients from the National Inpatient Sample (2002-2017) who underwent proctectomies and colectomies were included.

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Background: Socioeconomic disadvantage is a known contributor to adverse events and higher admission rates in the diabetic population. However, its impact on outcomes after lower extremity amputation is unclear. We aimed to assess the association of geographic socioeconomic disadvantage with short- and long-term outcomes after minor amputation in patients with diabetes.

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Introduction: The increased use of minimally invasive surgery in the management of colorectal cancer has led to a renewed focus on how certain factors, such as insurance status, impact the equitable distribution of both laparoscopic and robotic surgery. Our goal was to analyze surgical wait times between robotic, laparoscopic, and open approaches, and to determine whether insurance status impacts timely access to treatment.

Methods: After IRB approval, adult patients from the National Cancer Database with a diagnosis of colorectal cancer were identified (2010-2016).

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Background: The utility of dermal regeneration templates for treating high-risk diabetic foot wounds is unclear. The authors report wound healing and major amputation outcomes among a cohort of diabetic patients with complex diabetic foot wounds treated in a multidisciplinary setting.

Methods: All patients with complex diabetic foot wounds treated with a dermal regeneration template (March of 2013 to February of 2019) were captured in a prospective institutional database.

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Background: We aimed to assess patient and demographic factors, treatment trends, and survival outcomes of patients with colorectal cancer with metastasis to the liver, lung, or both sites. Differences remain among national guidelines about the optimal management strategy.

Methods: Adults from the National Cancer Database (2010 to 2015) with a primary diagnosis of colorectal liver, lung, or liver and lung metastases were included and stratified by metastasis site.

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We show that unsymmetric BODIPY compounds with one, two, and three methyl groups can be synthesized easily and efficiently by the unsymmetric reaction method. Their steady state and time-resolved fluorescence properties are examined in solvents of different polarity. These compounds show high fluorescence quantum yields (0.

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