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Coronary angiography (CAG) for diagnostic or therapeutic purposes such as percutaneous coronary intervention (PCI) is one of the common procedures which require the use of intravenous contrast media. The reported incidence of contrast induced nephropathy (CIN) in high-risk patients following CAG varies from 10% to 30%. The high rate of CIN in post-PCI patients could be related either to the patient (advanced age, previous CKD, diabetes, dehydration, and concomitant use of other nephrotoxic drugs) or procedure related (intra-arterial route of administration, use of high osmolar contrast media, repeated exposure to contrast within 48 hours, volume of contrast used). Several strategies to prevent or treat CIN have been developed, including hydration, N-acetyl-cysteine, statins, ascorbic acid, bicarbonate, aminophylline, forced diuresis, renal replacement therapy, and choice of low-osmolarity or alternative agents, but one of the most obvious means is to minimize contrast volume. The DyeVert plus Contrast Reduction System, is designed to lower the amount of contrast dye the kidneys are exposed to during a procedure. Because the amount of contrast dye is precisely controlled. The purpose of this prospective study is to understand how the monitoring system of Dye-Vert Plus will impact Acute Kidney Injuries rates in high-risk patients undergoing cardiac catheterization when used in conjunction with a standardized hydration policy.
Contrast agent is typically used during routine cardiac intervention in order to enhance the imaging necessary to perform the procedure. Using this contrast agent could lead to kidney injury, called contrast induced nephropathy (CIN). Currently, the methods used to reduce the risk of CIN include reducing the amount of contrast agent used and using a hydration strategy during procedure. A computer-based risk tool has been developed which reports a risk score for the likelihood a person undergoing cardiac intervention gets CIN and a proposed corresponding hydration strategy to reduce the risk of CIN. The purpose of this study is to determine whether the rate of CIN decreases when the treating physician has access to this risk tool during the procedure.
Contrast-Induced Nephropathy (CIN) can occur when patients with pre-existing kidney problems undergo procedures that use iodinated contrast media, such as cardiac catheterizations. RenalGuard Therapy was developed to enable the patient to clear the contrast out of their kidney before it can do significant damage. This study aims to enroll patients with increased risk of developing CIN who are scheduled for a cardiovascular catheterization. Patients will be randomized to either RenalGuard therapy or standard therapy.
The increased risk for contrast-induced nephropathy (CIN) in patients with chronic kidney disease (CKD) undergoing coronary angiography (CAG) has been established. Current and historical data on CIN prevention strategies have shown wide variation with respect to the optimal type, route and timing of these therapies. We investigate the role for oral hydration and/or oral sodium bicarbonate administration compared to intravenous hydration and/or sodium bicarbonate in patients with CKD undergoing CAG.
In patients undergoing coronary angiography, the incidence of contrast induced nephropathy(CIN)varies widely and ranges from \< 5% in the lowest risk patients, to nearly 50% in the highest risk patients. Prior data has shown oral n-acetyl cysteine (NAC) to be effective in reducing the incidence of CIN.Due to extensive first pass metabolism, the bioavailability of oral NAC is poor and ranges from 4%-10%. We hypothesize that the incidence of CIN will be reduced in patients with ACS who undergo PCI by the prophylactic administration of intravenous NAC. This is a prospective, randomized, double-blind, placebo-controlled single center clinical trial designed to evaluate the effects of intravenous NAC on patients with acute coronary syndromes (ACS)undergoing coronary angiography and/or percutaneous coronary intervention (PCI). The medication Acetadote is provided by Cumberland Pharmaceuticals Inc (www.cumberlandpharma.com). Patients will be excluded if they have end-stage renal disease requiring dialysis,known hypersensitivity to NAC or a history of life-threatening contrast reaction. Primary end-point is incidence of CIN. Secondary end-points are in-hospital mortality,30-day mortality,duration of hospitalization and change in serum cystatin C level.
This will be a randomized prospective dose escalation clinical study of N-acetylcysteine (NAC) in patients with stage 3 or worse renal failure (Glomerular Filtration Rate 30-60 ml/min calculated with the Modification of Diet in Renal Disease formula), undergoing a procedure or imaging that requires the administration of contrast media at Oregon Health \& Science University or the Portland Veterans Hospital. Subjects will receive NAC 60 minutes prior to the procedure or imaging requiring contrast media. Toxicity will be graded according to NCI Common Toxicity Criteria (CTC) version 3.0. An adult Phase 1 dose escalation study of NAC administered intravenously (IV) and intra-arterially (IA) will be performed. An isotonic nonionic contrast agent will be used in all cases. Contrast Induced Nephropathy (CIN) is defined as an increase in serum creatinine concentration of 25% or more from the subjects baseline value within a 72-hour period after the administration of contrast media. Serum creatinine concentration will be measured at admission, every day during in-patient hospitalization, and at hospital discharge.
This will be a randomized controlled trial closely following the original protocol in the previous study published in JAMA 2004 by Merten et al. Patients will be randomly assigned to one of two treatment groups. Treatment group A will receive 1cc/kg/hour of 0.9% normal saline at least 2 hours prior to study beginning and will be continued during and for 6 hours post contrast. Treatment group B will receive 3cc/kg of sodium bicarbonate solution for one hour prior to procedure then drip rate will be decreased to 1cc/kg/hour during and for 6 hours post procedure. The sodium bicarbonate solution will be made by adding 3 amps of bicarbonate to 1L of D5W. Patients in both treatment arms weighing \>110kg the initial fluid bolus and drip will be limited to those patients weighing 110kg. In both treatment arms, diuretics will be held before and after contrast administration on the day of the study. BMP will be checked the day of, 24 and 48 hours post contrast administration. The greatest change in all readings will be used for treatment comparisons. Contrast induced nephropathy will be defined as a change in serum creatinine of more than 25% from baseline and/or 0.5mg/dL. Urinary pH will also be measured on first spontaneous void following bolus. Vital signs including blood pressure and oxygen saturation will be documented every 4 hours to monitor patients closely for signs and symptoms of volume overload
Consecutive patients having percutaneous coronary intervention (PCI) over a period of 9 years at a large tertiary care center with available creatinine measurements both before and within 48 hours after the procedure were included; patients on chronic dialysis were excluded. Patients treated between 2012 and 2017 comprised the derivation cohort (n=14,616) and those treated from 2018 to 2020 formed the validation cohort (n=5,606). The primary endpoint is contrast-associated acute kidney injury (CA-AKI, defined per Acute Kidney Injury Network \[AKIN\]). In addition, independent predictors of CA-AKI will be derived from multivariate logistic regression analysis. Model 1 will include only preprocedural variables, while Model 2 will also include procedural variables. A weighted integer score based on the effect estimate of each independent variable will be used to calculate the final risk score for each patient. Impact on 1-year mortality will be also evaluated.
Multi-center randomized trial to assess the safety and performance of low-frequency therapeutic ultrasound for maintaining renal function after contrast exposure.
The purpose of this registry-based study is to evaluate the ongoing, real-world clinical performance and safety of commercially available DyeVert Systems during typical clinical use for patients undergoing coronary or peripheral angiography for diagnostic and/or interventional procedures.