Active clinical trials for "Acute Kidney Injury"

The purpose of this study is to test how well the NephroCheckTM Test, a noninvasive laboratory test performed on urine, predicts loss of kidney function in patients that have had a heart transplant or a Left Ventricular Assist Device (LVAD) or Total Artificial Heart (TAH) implanted.

Contrast induced nephropathy (CN) is a common cause of acute kidney injury and is associated with increased morbidity and mortality and healthcare cost. Iodinated contrast media (ICM) induce kidney injury through vasoconstriction and ischemia as well as direct tubular toxicity. Older subjects, individuals with preexisting kidney disease, diabetes, hypotension, and those exposed to higher volumes of ICM are at higher risks for CN. Within the last several years, multiple strategies have been used in clinical studies to reduce the risk of CN in high risk individuals with inconsistent results. In general, it is agreed that volume expansion is effective in reducing the risk. However, no study has looked at changes in renal blood flow (RBF) in response to volume expansion or after exposure to ICM to investigate its relationship with occurrence of CN. In this proposal, up to 125 individuals with preexisting kidney disease as evidenced by an estimated glomerular filtration rate (eGFR) between 30 - 60 ml/min/1.73 m2 and up to 25 individuals with normal renal function (total of up to 150 individuals) who are scheduled for coronary angiography will be studied. Each individual will have serial measurements of RBF; at baseline, after volume expansion with normal saline, and after exposure to ICM, using the novel technique of contrast enhanced ultrasound (CEU). The investigators will investigate the utility of monitoring RBF with CEU in predicting the occurrence of CN (a rise of > 0.3 mg/dL or 25% in baseline serum creatinine 48 hours after exposure to ICM) after adjusting for other known risk factors in the group of subjects with reduced GFR. The investigators will also examine the correlation between RBF changes and other urinary and serum biomarkers of kidney injury in this group. Up to 25 individuals with a normal kidney function will be studied in a separate part of the study in which the accuracy of CEU based measurements of RBF will be compared to the RBF and blood flow velocity obtained simultaneously using a Doppler flow probe placed directly inside the main renal artery during coronary angiogram procedure. Total to enroll = 150.

The aim of this study is to determine if by providing a collaborative, integrated pathway-based healthcare compared to the usual healthcare, whether or not this would be superior in reducing the length of hospital stay across five high frequency /high risk medical diagnoses: Acute Venous Thromboembolism, Acute Kidney Injury, Community Acquired Pneumonia, Adult Left Ventricular Heart Failure, and Asthma.

The purpose of the study is to determine the association between acute kidney injury and serum levels symmetrical and asymmetrical dimethylarginine (SDMA/ADMA) and their assumptive influence on mortality, renal function and on arterial stiffness.

Sustained low efficiency daily hemodiafiltration(SLEDD-f) is a kind of renal replacement therapy with high-flux dialyser membrane (helixone). The pore size of helixone is larger than most antibiotics, and vancomycin is supposed to be removed during dialysis. Our study wants to find the amount of vancomycin removed during SLEDD-f, and try to find the most appropriate dose regimen for this kind of patients.

Acute renal failure (ARF) is a rare but serious complication of gastroenteritis and dehydration, the most common reason for pediatric emergency visits. Renal function is determined by the glomerular filtration rate (GFR). Serum creatinine, the current marker of GFR, is insensitive and a late marker of ARF. Unfortunately, "gold standard" methods for measurement of GFR are impractical in the emergency setting. Recently, cystatin C (CysC) was introduced as superior marker for the measurement of GFR, particularly in children. A single random blood sample allows for accurate determination of GFR in the so-called "creatinine-blind" range and independent of the body composition. There is growing evidence that the determination of serum CysC concentration can detect ARF in adults earlier than serum creatinine or urinary fractional sodium excretion. No studies have examined this marker for the early detection of ARF in children at risk. We therefore propose a prospective study that compares CysC with other biomarkers of renal dysfunction for the early detection of ARF in children with dehydration due to gastroenteritis. Patients with minor trauma and a minimal likelihood of ARF will serve as a control. This study may establish CysC as an accurate and cost-effective marker for identifying patients at risk.

Iodinated contrast media are now frequently used in diagnostic imaging exams, including pediatrics. In adults, the acute renal failure (ARF) associated with contrast agents (CA-AKI) occur in 3-33% of exposed patients, especially as the patient is fragile, has comorbidities or pre-existing renal aggression . In children, the prevalence of this little known disease is probably underestimated. The investigators intend to conduct a prospective epidemiological study, to estimate the impact of the acute renale failure to iodinated contrast agents in pediatrics.

The study will examine the ability of renal ultrasound (Doppler and Contrast Enhanced Ultrasound (CEUS)) in distinguishing ICU patients who exhibit increases in glomerular filtration rate (GFR) in response to fluid loading, from those for whom fluid loading is without benefit of directly harmful.

The purpose of this study is to determine whether the use of RenalGuard system which creates high urine output with fluid balancing may prevent contrast induced nephropathy in patient undergoing cardiac resynchronization therapy (CRT) implantation.

The study will investigate the role of NSAIDs in the development of AKI in patients undergoing high-risk abdominal or thoracic surgery. The investigators hypothesize that the use of new urinary biomarkers will allow earlier detection of AKI than the current gold standard, i.e. changes in serum creatinine and/or urine output.