Publications by authors named "Vinayak Rohan"

Introduction: Kidney transplantation (KT) in older age is increasingly common as more elderly patients live with end-stage renal disease. Immunosuppression (IS) after KT confers additional risk in aging patients with weakened immune systems. We hypothesized that 1-year mortality among KT recipients aged 70 y and older would be higher in those receiving induction IS with alemtuzumab lymphocyte depletion versus basiliximab interleukin-2 inhibition.

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Introduction: Kidney transplantation (KT) is the treatment of choice for end-stage renal disease. Diabetes mellitus is the most common indication for KT, with most recipients having type 2 diabetes mellitus (T2DM). Previous studies have shown inferior patient survival in T2DM KT recipients.

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Encapsulating peritoneal sclerosis is a rare but highly morbid disease process in patients with end-stage kidney disease on peritoneal dialysis. Surgical management has been described in patients with encapsulation of bowel causing obstruction. Here, we describe a case of surgical management in a patient following kidney transplant with medically refractory ascites and lower extremity edema.

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Outcomes analyzing conversion from IR-tacrolimus (IR) to LCP-tacrolimus (LCP) in obesity are limited. This was a retrospective longitudinal cohort study of patients converted from IR to LCP from June 2019 to October 2020. Primary outcomes were conversion ratios for weight-based dose at a steady-state therapeutic level and identification of appropriate dosing weight.

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Importance: Opioid use following kidney transplant is associated with an increased risk of graft loss and mortality. Opioid minimization strategies and protocols have shown reductions in short-term opioid use after kidney transplant.

Objective: To evaluate the long-term outcomes associated with an opioid minimization protocol following kidney transplant.

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Introduction: The traditional sutured venous anastomosis used during arteriovenous graft implantation is associated with a high incidence of subsequent stenosis that is attributed to neointimal hyperplasia. Hyperplasia results from multiple factors, including hemodynamic abnormalities and vessel trauma during implantation. A novel anastomotic connector device was designed to provide an alternative, less traumatic, endovascular venous anastomosis that may ameliorate the clinical challenges associated with a sutured anastomosis.

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Background: The influence of converting to once daily, extended-release LCP-Tacrolimus (Tac) for those with high tacrolimus variability in kidney transplant recipients (KTRs) is not well-studied.

Methods: Single-center, retrospective cohort study of adult KTRs converted from Tac immediate release to LCP-Tac 1-2 years post-transplant. Primary measures were Tac variability, using the coefficient of variation (CV) and time in therapeutic range (TTR), as well as clinical outcomes (rejection, infections, graft loss, death).

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Diabetes (DM) is a common comorbidity in transplant patients with known effects on gastrointestinal (GI) motility and absorption; however, DM's impact on immediate release (IR) tacrolimus to LCP-tacrolimus (LCP) conversion ratios has not been studied. This multivariable analysis of a retrospective longitudinal cohort study included kidney transplant recipients converted from IR to LCP between 2019 and 2020. The primary outcome was IR to LCP conversion ratio based on DM status.

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Article Synopsis
  • - The study investigates the willingness of uninfected kidney and liver transplant candidates to accept organs infected with hepatitis C virus (HCV) and finds that education significantly increases acceptance rates from 58% to 86%.
  • - Factors that enhance willingness include being over age 50, having longer waiting times, and possessing trust in the transplant system, with key motivations being reduced waiting time and the effectiveness of new treatments (DAAs).
  • - The researchers recommend providing tailored, digestible information about HCV-transplantation to help patients make informed decisions based on their individual understanding and health literacy levels.
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Introduction: The discovery of apolipoprotein L1 (ApoL1) has raised important ethical and clinical questions about genetic testing in the context of living and deceased kidney donation. Largely missing from this discussion are the perspectives of those African Americans (AA) most likely to be impacted by ApoL1 testing.

Methods: We surveyed 331 AA potential and former living kidney donors (LKDs), kidney transplant candidates and recipients, and nonpatients at three United States transplant programs about their ApoL1 testing attitudes.

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Background: The new kidney allocation changes with elimination of donor service areas (DSAs) and Organ Procurement and Transplantation Network regions were initiated to improve equity in organ allocation. The aim of this evaluation was to determine the operational, financial, and recipient-related effect of the new allocation system on a large rural transplantation program.

Study Design: A retrospective, cross-sectional analysis of organ offers, allograft outcomes, and attributed costs in a comparative time cohort, before (December 16, 2020 to March 14, 2021) and after (March 15, 2021 to June 13, 2021) the allocation change was performed.

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Article Synopsis
  • The MILLER procedure is a minimally invasive technique used to treat patients with dialysis access-related steal syndrome and issues like pulmonary hypertension and heart failure.
  • A retrospective study of 13 patients showed technical success in all cases, with a median follow-up of 12 months and varying rates of primary and secondary patency.
  • Although the procedure improved symptoms and had decent long-term patency rates (83% at 6 months, 66% at 12 months), further interventions may be necessary for maintaining effectiveness over time.
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Background: Racial disparities following pancreas transplantation (PTX) are poorly defined.

Methods: This was a large-scale, single-center, longitudinal cohort study including adult PTX recipients. Patients were grouped by race to allow for comparisons.

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Background: The aim was to evaluate the effects of music on patients' anxiety and satisfaction after undergoing dialysis access procedures under moderate sedation.

Methods: Patients (n = 30) undergoing moderate sedation for dialysis access procedures were evaluated at a single institution. Each patient filled out a survey preoperatively and postoperatively using the short form State-Trait Anxiety Inventory (STAI-6).

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Background: Maintaining access to kidney transplantation during a pandemic is a challenge, particularly for centers that serve a large rural and minority patient population with an additional burden of travel. The aim of this article was to describe our experience with the rollout and use of a virtual pretransplantation evaluation platform to facilitate ongoing transplant waitlisting during the early peak of the COVID-19 pandemic.

Study Design: This is a retrospective analysis of the process improvement project implemented to continue the evaluation of potential kidney transplantation candidates and ensure waitlist placement during the COVID-19 pandemic.

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Background: Allo-antigen-specific T-cytotoxic memory cells (TcM) which express CD40 ligand (CD154) in overnight lymphocyte co-culture are strongly associated with acute cellular rejection (ACR) seen in "for cause" biopsies for renal allograft dysfunction. Specifically, when the likelihood of rejection is increased, donor-specific allospecific TcM exceed those induced by HLA-non-identical third-party cell by 1.15-fold or greater.

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Study Objective: Opioid use has been associated with significant morbidity and mortality in the United States. Studies within kidney transplantation have also shown increased risk of mortality, graft loss, and complications in kidney transplant recipients who use opioids prior to transplant. The objective of this analysis was to identify if recent pretransplant opioid exposure would be an effective risk-stratifier for patients at risk for readmissions and readmission costs.

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Post-transplant lymphoproliferative disorder (PTLD) comprises a broad spectrum of diseases and is a rare but serious complication of solid organ transplantation. We report the case of a 45-year-old simultaneous pancreas and kidney (SPK) transplant recipient with diffuse, early-onset PTLD, manifesting as jejunal perforation at 6 months after transplantation. The patient underwent urgent small bowel resection of the affected portion of jejunum.

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Apolipoprotein L1 (ApoL1) predictive genetic testing for kidney disease, and its emerging role in transplantation, remains controversial as it may exacerbate underlying disparities among African Americans (AAs) at increased risk. We conducted an online simulation among AAs (N = 585) about interest in ApoL1 testing and its cofactors, under 2 scenarios: as a potential living donor (PLD), and as a patient awaiting transplantation. Most respondents (61%) expressed high interest in genetic testing as a PLD: age ≥35 years (adjusted odds ratio [aOR], 1.

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There is a high rate of Emergency Department (ED) utilization in kidney recipients post-transplant; ED visits are associated with readmission rates and lower survival rates. However, utilization within and outside transplant centers may lead to different outcomes. The objective was to analyze ED utilization patterns at transplant and non-transplant centers as well as common etiologies of ED visits and correlation with hospitalization, graft, and patient outcomes.

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Opioid use after kidney transplant has been shown to be a risk factor for chronic opioid use, which leads to an increased risk of mortality. The purpose of this study was to evaluate the early impact of a multimodal pain regimen and education quality improvement program on opioid use after kidney transplant 2 months after implementation. This was a retrospective, single-center analysis of post-operative opioid use, comparing the average daily Morphine milligram equivalents (MME) of the patients who received education on opioids and a multimodal pain regimen (preoperative TAP/QL block, scheduled APAP and gabapentin) compared to a historical control group.

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Tacrolimus (Tac) is widely used to prevent rejection and graft loss in solid organ transplantation. A limiting characteristic of Tac is the high intra and interpatient variability associated with its use. Routine therapeutic drug monitoring (TDM) is necessary to facilitate Tac management and to avoid undesirable clinical outcomes.

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