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Conray (Iothalamate Meglumine Intravascular) - Summary




CONRAY is a sterile aqueous solution intended for use as a diagnostic radiopaque medium.

CONRAY is indicated for use in excretory urography, cerebral angiography, peripheral arteriography, venography, arthrography, direct cholangiography, endoscopic retrograde cholangiopancreatography, contrast enhancement of computed tomographic brain images, cranial computerized angiotomography, intravenous digital subtraction angiography and arterial digital subtraction angiography.

CONRAY may also be used for enhancement of computed tomographic scans performed for detection and evaluation of lesions in the liver, pancreas, kidneys, abdominal aorta, mediastinum, abdominal cavity and retroperitoneal space. Continuous or multiple scans separated by intervals of 1-3 seconds during the first 30-90 seconds post-injection of the contrast medium (dynamic CT scanning) may provide enhancement of diagnostic significance, and may be of benefit in establishing diagnoses of certain lesions in these sites with greater assurance than is possible with CT alone, and in supplying additional features of the lesions. In other cases, the contrast agent may allow visualization of lesions not seen with CT alone, or may help to define suspicious lesions seen with unenhanced CT. (See CLINICAL PHARMACOLOGY). Subsets of patients in whom delayed body CT scans might be helpful have not been identified. Inconsistent results have been reported and abnormal and normal tissues may be isodense during the time frame used for delayed CT scanning. The risks of such indiscriminate use of contrast media are well known and such use is not recommended. At present, consistent results have been documented using dynamic CT techniques only.

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Clinical Trials Related to Conray (Iothalamic Acid Intravascular)

Evaluation of New Test Method to Measure Kidney Function [Completed]
This study will test the accuracy of a new "Fast GFR" (glomerular filtration rate) test to evaluate kidney function. Accurate assessment of kidney function is important in many clinical situations, including detecting kidney disease early, determining appropriate drug dosages, deciding when to begin dialysis, and evaluating heart and kidney organ donors and recipients. The current GFR test is used mostly for research purposes, as it is too costly and complicated for general medical use. Another significant drawback to its use in diagnosing acute kidney failure is the time it takes (3 to 24 hours) to complete, since effective therapy for this condition requires its detection as soon as possible. The Fast GFR, by comparison, takes only 45 minutes. Patients 6 years old and older with kidney disease or with impaired kidney function caused by abnormal heart function or swelling-from congestive heart failure, severe infections, swelling from fluid accumulation, fluid in the abdomen, or burns-may be eligible for this study. Patients will undergo both the standard and the Fast GFR tests, described below, to evaluate the accuracy of the new test. Fast GFR: Two catheters (thin flexible tubes) are placed into two arm veins, one for injecting iothalamate-an agent commonly used in CT scanning and blood vessel imaging-and the other for collecting blood samples. Baseline blood and urine samples are collected and then 0. 5 milliliter (ml) iothalamate is injected into a vein. Blood samples are collected at 5, 10, 15, 20, 30, and 45 minutes in adults and at 5, 15, and 45 minutes in children. Urine is collected at 45 minutes. The size of the bladder is measured using ultrasound to determine if the bladder has completely emptied. Standard GFR: Iothalamate (1 ml) is injected under the skin. Blood samples are collected at 60, 90, 120, 180 and 240 minutes. (A heparin lock is used to avoid multiple needle sticks.) Urine is collected at 60, 90, 120, 180 and 240 minutes. The size of the bladder is measured using ultrasound to determine if the bladder has completely emptied.

ARMOR (Analyzing Renal Mechanisms of Creatinine Excretion in Patients On tesaglitazaR) [Terminated]
This is a prospective 24-week, randomized, parallel-group, multi-center, active-controlled (pioglitazone 45 mg) open-label study designed to assess the effects of tesaglitazar 2 mg per day on components of renal excretion of creatinine in type 2 diabetics. The study comprises a 2-week enrollment period, followed by a 24-week double blind treatment period and an 8-week follow-up period

Pilot Study of Mycophenolate Mofetil in Congenital Uropathies [Completed]
Congenital or hereditary structural anomalies of the genitourinary tract account for approximately half of all cases of end stage renal disease in the pediatric population. Despite optimal medical management, when the GFR falls below 50 ml/min/1. 73 M2, nearly 40% of affected children will require dialysis or a renal transplant within 2 years. At present, there is no specific treatment for patients with congenital uropathies that can retard the progressive loss of kidney function and forestall the need for renal replacement therapy. There is evidence in experimental animals and in patients with chronic renal failure (CRF) that immunoeffector mechanisms are activated within the renal parenchyma. Infiltration of the kidney by macrophages, monocytes, and lymphocytes, activation of renal tubular epithelial cells, and release of pro-inflammatory cytokines result in fibrosis and irreversible organ damage. Mycophenolate mofetil (MMF) is a new immunosuppressive agent that is used to prevent acute rejection in kidney transplant recipients. It attenuates renal damage in the remnant kidney model of CRF in which there is no primary immunological injury. Therefore, this pilot study is designed to test the hypothesis that immunosuppressive treatment with MMF in children with structural causes of CRF will be safely tolerated and that this therapy will retard progressive decline in renal function. Patients with congenital uropathy, 3-16 years of age and with a GFR less than 50 ml/ml/1. 73 M2, will be treated with MMF for 24 months. The two primary endpoints are: (1) safety and tolerance of the drug; and (2) need for dialysis or kidney transplantation. It is anticipated that the MMF will be free of significant toxicity and that administration of the drug will reduce the frequency of progression to end stage renal disease from 38% to 19%. Patients will be followed at 3-month intervals and they will undergo serial assessment of proteinuria, estimated GFR and iothalamate clearance, urinary cytokine excretion, urine flow cytometry, and immunologic testing. The significance of this pilot study is that it may provide evidence in support of a randomized, double-blind, placebo-controlled trial of immunological treatment of congenital structural causes of CRF in children

The Comparison of Tacrolimus and Sirolimus Immunosuppression Based Drug Regimens in Kidney Transplant Recipients [Completed]
This study was done to find out which treatment, tacrolimus or sirolimus, leads to better long-term kidney function in kidney transplant patients.

Comparative Renal Function of Young (18-45 Years) and Ageing (55 Years and Above) Kidney Donors [Recruiting]
It is our purpose in this study to compare the kidney structure and function of older patients to that of young patients before and after removal of a single kidney for transplant donation and to examine the remaining kidney's ability to adapt and maintain function over time. More specifically, we aim to examine the effect of uninephrectomy on adaptive hyperfiltration in the remaining kidney. A secondary aim is to investigate whether subjects in the aging population undergo compensation to the same extent as younger subjects. We will also examine the compensatory rise in GFR (glomerular filtration rate) that follows uninephrectomy in both groups, and, again, compare the results in the aged versus young subjects. This will help in delineating the extent to which the aging population can be a potential source of living kidney donors for kidney transplantation. It is also our purpose with this study to refine the tests to be used in the donor evaluation process so as to accurately identify ideal candidates for safe kidney donation.

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Page last updated: 2006-05-11

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