Publications by authors named "Nyingi Kemmer"

Medical professional environments are becoming increasingly multicultural, international, and diverse in terms of its specialists. Many transplant professionals face challenges related to gender, sexual orientation or racial background in their work environment or experience inequities involving access to leadership positions, professional promotion, and compensation. These circumstances not infrequently become a major source of work-related stress and burnout for these disadvantaged, under-represented transplant professionals.

View Article and Find Full Text PDF

First-line treatment for nonalcoholic fatty liver disease (NAFLD) focuses on weight loss through lifestyle modifications. Weight loss ≥5% results in reduction of steatosis and weight loss ≥10% has been associated with improvement in hepatic inflammation and fibrosis. The incidence and sustainability of weight loss among patients with NAFLD were estimated and associating factors identified.

View Article and Find Full Text PDF

Background: In 2014, direct-acting antivirals (DAAs) became available for hepatitis C virus (HCV) with successful results. Since their implementation, the rate of HCV waitlist (WL) for liver transplantation (LT) has decreased, but significant ethnic disparities exist. We hypothesized that the rate of decline for HCV WL for LT is different across the various racial groups.

View Article and Find Full Text PDF

Background: The incidence of alcoholic liver disease (ALD) has increased, causing it to become a primary indication for liver transplantation in the United States. We hypothesized an association between alcohol taxation and prevalence of ALD.

Methods: We conducted a retrospective study of united network for organ sharing (UNOS) waitlist additions for liver transplantation between January 2007 and December 2016.

View Article and Find Full Text PDF

Background: Coronary artery disease (CAD) is a leading cause of mortality following orthotopic liver transplant, yet there is no standardized protocol for pre-liver-transplant coronary artery disease assessment. The main objective of this study was to determine the agreement between 2 methods of cardiac risk assessment: dobutamine stress echocardiogram (DSE) and coronary calcium score (CCS) and to determine which test was best able to predict coronary calcification in low-risk patients.

Methods: A retrospective study was performed using the medical records of 436 patients who received cardiac clearance for a liver transplant.

View Article and Find Full Text PDF

Background: Pulmonary function tests (PFTs) are currently recommended for liver transplant candidates. We hypothesized that PFTs may not provide added clinical value to the evaluation of liver transplant patients.

Methods: We conducted a retrospective cohort study of adult cadaveric liver transplants from 2012 to 2018.

View Article and Find Full Text PDF

An 18-year-old male who had been diagnosed at age 7 with a rare, progressive liver disease was referred to the transplant center and received a transplant, even though he did not meet the center's criteria for a patient with hepatopulmonary syndrome (HPS). Complications required relisting the patient urgently, but he eventually fully recovered; total hospital charges for his treatment exceeded $5 million. Reflection upon the case resulted in analysis of two ethical questions: primarily, clinician obligation to balance the provision of actuarially fair health care to society against the healing of a single patient; secondarily, the effects of malleable transplant criteria on trust in the patient selection process.

View Article and Find Full Text PDF

Introduction: Hepatitis C virus (HCV) infection is common in patients with end-stage renal disease. We investigated the safety and efficacy of ombitasvir (OBV)/paritaprevir (PTV)/ritonavir (r) ± dasabuvir (DSV) ± ribavirin (RBV) in 2 phase 3, open-label, multicenter studies in patients with stage 4 or 5 chronic kidney disease (CKD).

Methods: RUBY-I, Cohort 2 enrolled treatment-naïve or -experienced patients with HCV genotype (GT) 1a or 1b infection, with or without cirrhosis.

View Article and Find Full Text PDF

Long-term outcomes in liver transplantation for acute liver failure (ALF) are poorly studied. The aim of the study was to identify psychosocial variables that affect adherence and late survival. Retrospective review of ALF liver transplant (LTx) patients between 1997 and 2017 (n = 47) was conducted.

View Article and Find Full Text PDF

Background: Elective abdominal surgeries in patients with cirrhosis have been discouraged due to the high risk of complications. This study investigates the outcomes and safety of surgeries for hernias, and laparoscopic cholecystectomies in cirrhotic patients.

Methods: A retrospective cohort study that compared 91 cirrhotic patients to a control group of non-cirrhotic patients operated by liver transplant surgeons was conducted between 2009 and 2015.

View Article and Find Full Text PDF

Purpose: Prognostication following liver transplantation is limited. Red cell distribution width (RDW) has been associated with morbidity and mortality in a variety of diseases. We hypothesize RDW is predictive of mortality postliver transplantation.

View Article and Find Full Text PDF

Fibrolamellar hepatocellular carcinoma is a rare hepatocellular tumor usually arising in noninfected and noncirrhotic livers. Only 2 cases accompanied by hyperammonemia due to intrahepatic shunting have been reported. A 23-year-old white woman presented with a 2-week history of nausea, vomiting, generalized weakness, and intermittent right upper quadrant pain.

View Article and Find Full Text PDF

Recurrence of hepatocellular carcinoma (HCC) remains a main detriment to long-term survival in liver transplants (LTx) for HCC. The study aims to review the use of sorafenib in recurrent HCC LTx in the Model End Stage Liver Disease era. Two hundred forty-seven patients with HCC LTx from 2002 to 2013 were included.

View Article and Find Full Text PDF

Nonalcoholic steatohepatitis (NASH) is increasingly recognized as the most common chronic liver disease worldwide. The aim of this study is to investigate the transplantation trends of liver transplant (LT) recipients with NASH. Using the United Network for Organ Sharing database, we found a steady increase in LT rate especially in those more than 65 years old.

View Article and Find Full Text PDF

Background: Obesity has been associated with poor oncologic outcomes following pancreatoduodenectomy for pancreatic cancer. However, there is a paucity of evidence on the impact of obesity on postoperative complications, oncologic outcome and survival in patients with hepatocellular carcinoma (HCC) undergoing orthotopic liver transplantation (OLT).

Methods: From a database of over 1000 patients who underwent OLT during 1996-2008, 159 patients with a diagnosis of HCC were identified.

View Article and Find Full Text PDF

Cirrhosis is a chronic liver disease stage that encompasses a variety of etiologies resulting in liver damage. This damage may induce secondary complications such as portal hypertension, esophageal variceal bleeding, spontaneous bacterial peritonitis, and hepatic encephalopathy. Screening for and management of these complications incurs substantial health care costs; thus, determining the most economical and beneficial treatment strategies is essential.

View Article and Find Full Text PDF

Goals: The purpose of this study was to assess the incidence of Clostridium difficile infection in patients who received rifaximin for the treatment of hepatic encephalopathy (HE).

Methods: Medical charts of patients who received rifaximin for the treatment of HE were reviewed. The number of patients who developed diarrhea during treatment with rifaximin and results of latex agglutination assays to detect C.

View Article and Find Full Text PDF

Goals: To evaluate the durability of the response to rifaximin for treatment of hepatic encephalopathy (HE).

Background: The nonsystemic antibiotic rifaximin has been approved for maintenance of HE remission, and several studies have indicated the efficacy of rifaximin for acute HE; however, the duration of therapeutic response for >6 months remains unknown.

Study: Medical records of patients with cirrhosis who received rifaximin maintenance therapy for HE between January 2004 and May 2009 were reviewed.

View Article and Find Full Text PDF

There is a paucity of information on the utilization patterns of liver transplantation (LT) for HIV-positive individuals. The aim of this study is to examine the trends in LT of HIV patients in the US. This study was a retrospective analysis using the UNOS database (1999-2008).

View Article and Find Full Text PDF
Ethnic disparities in liver transplantation.

Gastroenterol Hepatol (N Y)

May 2011

End-stage liver disease is a major cause of morbidity and mortality among ethnic minorities. In the United States, ethnic minorities comprise approximately 30% of all adult liver transplantations performed annually. Several studies have suggested that ethnic populations differ with respect to access and outcomes in the pre- and post-transplantation setting.

View Article and Find Full Text PDF

Hepatitis C-related arthropathy is one of the most common extrahepatic manifestations of hepatitis C virus (HCV) infection. Although symptoms can be disabling, the prognosis typically is benign. Patients who have atypical chronic inflammatory arthritis with an unknown cause should be evaluated for HCV infection.

View Article and Find Full Text PDF

We report the case of a 46-year-old white male with confirmed Clostridium difficile infection for >4 weeks after fluoroquinolone therapy. The patient received two courses of metronidazole 500 mg three times daily (t.i.

View Article and Find Full Text PDF

Previous data have suggested that the nonsystemic antibiotic rifaximin may be effective for the treatment of Clostridium difficile infection (CDI). This single-center retrospective study evaluated the efficacy of rifaximin for the treatment of CDI refractory to standard treatments in patients who had received liver transplants. Among 205 patients who had received liver transplants between July 2001 and December 2007, 3 patients with a confirmed diagnosis of C.

View Article and Find Full Text PDF

Hepatitis C virus (HCV) is a major cause of chronic liver disease infecting more than 170 million people worldwide. HCV produces a wide gamut of manifestations varying from mild self-limiting disease to cirrhosis and hepatocellular carcinoma. A variety of viral, environmental and host genetic factors contribute to the clinical spectrum of patients infected with HCV and influence response to interferon (IFN) therapy.

View Article and Find Full Text PDF