View clinical trials related to Contrast Media Reaction.
Filter by:The proposed study aims to compare (a) volume contrast administered for Optical Coherence Tomography (OCT) Imaging, (b) length of clear OCT images, and (c) electrocardiographic changes immediately after contrast injection between iso-osmolar and low-osmolar contrast agents. The proposed study is a prospective, single-centered, randomized controlled, study that will compare an iso-osmolar vs. a low-osmolar contrast agent in patients undergoing clinically indicated coronary OCT imaging. Each patient will be randomized to OCT acquisition.
We collected retrospectively the non contrast MRI in chia yi memorial hospital for different venous disease of lower extremity morphology and flow ananlysis were done.
Intravascular administration of iodinated contrast media is an essential tool for cardiovascular imaging and percutaneous coronary interventions. Nonetheless, the increasing incidence of contrast-induced nephropathy (CIN) has become an important and prognostically relevant problem along with the spreading of diagnostic and interventional procedures. CIN is largely dependent on oxidative damage and represents a considerable cause of renal failure, being associated with prolonged hospitalization and significant morbidity/mortality. The most effective treatment strategy of this serious complication remains prevention, and several preventive measures have been extensively investigated in the last few years. Pre-procedural hydration is the best known and mostly accepted strategy. The administration of sodium bicarbonate (HCO3) has controversial effects, and is likely to be ineffective when the infused dose is unable to achieve adequate urine alkalinization. Since alkaline pH suppresses the production of free radicals, increasing urine pH would be an attractive goal for CIN prevention. In a randomized clinical trial the investigators will test the hypothesis that urine alkalinization with either oral or i.v. bicarbonate on top of hydration alone is the main determinant of CIN prevention in a population of patients with moderate or severe chronic kidney disease scheduled for coronary angiography and/or angioplasty. If the investigators, demonstrate non-significant differences in urine alkalinization (primary endpoint) and incidence of CIN (secondary endpoint) between the bicarbonate groups, a practical implication will be that oral administration is preferable for practical reasons over the administration of i.v. bicarbonate.
As iodinate contrast media (CM) has been widely used in current medical practice, contrast induced acute kidney injury (CI-AKI) has been an important issue. Previously, many guidelines suggested prophylaxis protocol using 0.9% saline when CM is administrated to high risk patients. However, recent studies showed that 0.9% saline might induce metabolic acidosis due to its supra-physiologic chloride component, and therefore renal vasoconstriction. In spite of protective effect by volume expansion with saline infusion, this renal vasoconstriction might have conflicting effect on renal function, as hypoxic injury is suspected to be the main cause of CI-AKI. In contrast to 0.9% saline, balanced salt solution has physiologic level of chloride and neutral pH. Also, recent studies proved preventive effect of balanced salt solution for AKI in several clinical settings. Hence, the investigators planned a prospective randomized controlled trial comparing 0.9% saline and balanced salt solution to prevent CI-AKI.
The study is analysis of the incidence of contrast-induced nephropathy (CIN) in patients with previously normal renal function undergoing angiography and comparison between the three different treatment protocols on renal function. Patients are randomly assigned to the three groups: 1) peroral hydration, 2) Na bicarbonate (NaHCO3), and 3) NaHCO3 plus N-acetylcysteine (NAC) infusion. Serum creatinine (SCr), blood urea nitrogen (BUN), and neutrophil gelatinase-associated lipocalin (NGAL) are measured before and 48 hours after the angiography. CIN was defined as an absolute increase of 0.5 mg/dL or a relative increase of >25% in creatinine levels 48-72 hours after the procedure