Nephrology
Clinical discussions on kidney disease management, dialysis, transplantation, and electrolyte disorders.
Recent Discussions
Do you prefer monitoring creatinine over cystatin C levels in patients with lymphoma and chronic kidney disease given the potential for cystatin C levels to be increased with certain malignancies?
My default is to monitor creatinine, not cystatin C, in all patients with malignancies except: if patients have had weight loss and down-trending creatinine, patients are at eGFR cutoffs for chemotherapy drug dosing, leading to concern for potential over/under-dosing, there is concern for pseudo-AKI...
Do you recommend stopping a SGLT2i indefinitely if a patient with chronic kidney disease and diabetes develops euglycemic diabetic ketoacidosis?
I would. In my opinion, the risk of ketoacidosis will outweigh the possible benefit from SGLTs.
Do you recommend dietary protein restriction in your patients with chronic kidney disease?
Not really. I let the serum BUN be the guide. If the serum BUN is very high and otherwise patient does not need dialysis then it may be helpful to decrease the protein intake. This is more often observed in inpatients (with some degree of AKI) than outpatients.
What else do you consider in the differential diagnosis for pulmonary-renal syndromes if there is low clinical and serologic evidence of AAV, Goodpasture's or other rheumatologic disease (SLE, RA, APS, Scleroderma)?
Endocarditis can mimic vasculitis and can have pulmonary hemorrhage. You CANNOT miss that one. Sarcoidosis is I suppose a pulmonary renal syndrome. Renal vein thrombosis from MGN with a pulmonary embolus is I suppose a pulmonary-renal syndrome.
How do you approach treating mild hypercalcemia in patients with sarcoidosis?
This may seem like a straightforward query, but like many issues surrounding sarcoidosis, it is actually deceptively complex. For a more complete discussion, I refer the readers to an excellent review by Lower and Saidenberg-Kermanac’h (2019). In and of itself, asymptomatic “mild” hypercalcemia does...
Do you prefer assessing cystatin C or creatinine when monitoring a patient’s eGFR who is receiving chemotherapy for malignancy?
If the patient is on a drug known to interfere with creatinine handling in the renal tubules (e.g. abemaciclib), then I will intermittently check the cystatin C to differentiate true AKI from pseudo-hypercreatinemia since these drugs can also cause true AKI.
What is your approach to lab and imaging monitoring in a patient with an elevated creatinine following a unilateral nephrectomy?
One should expect some elevation in serum creatinine after unilateral nephrectomy in the majority of patients. Hyperfiltration seems to be universal but is often not complete. Over time, the serum creatinine stabilizes and often improves some but likely not to baseline. I would repeat serum creatini...
What is the antifungal prophylaxis regimen that you use in patients on peritoneal dialysis who are receiving antibiotics?
Data indicates that either nystatin (500,000 U qid) or fluconazole (200 mg q48 hours) is effective in minimizing the risk of fungal peritonitis in PD patients being treated with antibiotics. See the most recent ISPD guidelines (Kam-Tao Li et al., PMID 35264029) for details. As there is less risk of ...
Is there a subset of ANCA vasculitis patients for which you would try plasma exchange?
Circling back to this now that we have more data. I agree with Dr. @Dr. First Last's main conclusion that GN or the presence of concomitant anti-GBM antibodies are the primary scenarios in which there may be a role for plasma exchange patients with ANCA-associated vasculitis.Following the PEXIVAS tr...
Do you recommend initiating a potassium sparing diuretic in patients with recurrent nephrolithiasis who have hypercalciuria but do not tolerate thiazide diuretics?
No. The idea of using a thiazide diuretic as a preventive treatment for calcium-containing stones is its hypocalciuric effect. Potassium-sparing diuretics do not have this ability. Loop diuretics worsen hypercalciuria and, in general, are inappropriate for use in calcium stone formers. One could con...