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Nephrology/Catscan With Dye OK With One Kidney?

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Question
Dear Dr. Shah<
I am one month post-radical nephrectomy due to a large RCC discovered incidentally. The oncologist wants a follow-up scan with IV dye in three months. When I expressed my concerns about the dye harming my lone kidney, the response was that the scan would not be performed with dye if my kidney function tests were abnormal at the time. But even if the tests turn out normal, does that mean the dye is safe for me? Or would the dye cause damage to the kidney anyhow? Second question, if I may? Would a laxative based on polyethylene glycol be safe in my case? Thank you for your help with these questions.

Answer
Frank,

Thanks for asking my help on Allexperts.

All patients with dye do not develop kidney problems. When undergoing any procedure, it is standard practice to evaluate the risk/benefit ratio. In your case, the benefit outweighs the risks. I agree with your doctor. If your kidney function tests are normal at that time, you should go ahead with the study.

PEG has been connected to nephrotoxicity — an euphemism for kidney damage — when used as a drug solvent. For this reason PEG is contraindicated for patients with kidney disease. However, (I presume that) you do not have chronic kidney disease. To be on the safer side, ask your doctor to prescribe a lactulose based laxative.

Sincerely,

Dr. Shah

Nephrology

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Dr. Shamik Shah, MD, DNB (Nephrology), ISN Fellow

Expertise

I can answer all questions related to kidney diseases, hypertension, plasmapheresis and kidney transplantation. I am an Indian-Board certified Nephrologist. I was a post-Doctoral Scholar at the Division of Nephrology & Hypertension,Department of Medicine, University of California, San Diego. My area of interest is Critical care Nephrology and Acute Kidney Injury.

Please mention the units in which your lab results were reported and the normal reference range for your laboratory.


Alternative Website
http://www.syndeohealth.com/doctors/shamik-shah/91

Experience

Ten years as a Critical Care & Transplant Nephrologist

Organizations
International Society of Nephrology
Indian Society of Nephrology
Indian Medical Association
European Renal Association


Publications
- Shah SH, Cerda J. Acute Tubular Necrosis; Lerma, Edgar V., Rosner, Mitchell eds. Clinical Decisions in Nephrology, Hypertension and Kidney Transplantation. Springer ISBN 978-1-4614-4453-4, pp. 191-198
- Shah SH, Cerda J. Management of Acute Kidney Injury; Lerma, Edgar V., Rosner, Mitchell eds. Clinical Decisions in Nephrology, Hypertension and Kidney Transplantation. Springer ISBN 978-1-4614-4453-4
- Cerda J, Tolwani A, Shah SH, Ronco C. Continuous Renal Replacement Therapies in Modeling and Control of Dialysis Systems edited by Azar AT, Springer-Verlag, Heidelberg, Germany (In Press)
- Shah SH, Cerda J, Kellum JA. Acute Kidney Injury in Special Circumstances. John Kellum, Jorge Cerda, eds. Renal and Metabolic Disorders, Oxford University Press (In press)
- Shah SH, Mehta RL. “Anticoagulation in CRRT: Is Citrate better?”; Vineet Nayyar Ed. Critical Care Update 2009, Jaypee Brothers (In press)
- Shah SH, Mehta RL. “Non-dialytic management of acute kidney disease”; Evidence based Nephrology, BMJ, (In press)
- Shah SH, Mehta RL. “Epidemiology of Community-acquired AKI”; Ronco C, Bellomo R, Kellum J Eds. Critical Care Nephrology, Saunders. ISBN 1-4160-4252-0
- Abdeen O, Shah SH, Mehta RL; “Dialysis therapies in the surgical intensive care unit”; William Wilson, Christopher Grande, David Hoyt Eds. Trauma: Resuscitation, Anesthesia, and Critical Care, Informa Healthcare, NY 2007. ISBN 0-8247-2920-X
- Shah SH, Mehta RL. Acute kidney injury in critical care: time for a paradigm shift? Curr Opin Nephrol Hypertens. 2006 Nov;15(6):561-5.
- Shah, SH, Soroko S, Lischer E, Mehta RL. Delivered vs. Prescribed dose of Dialysis in Hospitalized Patients: Results of an Audit. J Am Soc Nephrol 17(Abstracts Issue): 2006, 107A.
- Shah SH et al “Biochemical Nutritional Parameters in Non-vegetarian and Vegetarian CAPD patients” Perit Dial Int 2001; 21 Suppl 2: S1-182


Education/Credentials
MBBS, MD (Internal Medicine), Diplomate of National board (Nephrology), ISN Fellow

Awards and Honors
Educational Ambassador of the International Society of Nephrology 2010
Fellowship of the International Society of Nephrology 2005.
Young Investigator Award by the International Society of Peritoneal Dialysis 2001

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