Here are some simple facts about urine specific gravity, osmolality and their determination from the urinalysis. Specific gravity The reference substance for comparative purposes is water, which therefore has a specific gravity of 1.000. The so-called normal ranges…
My name is Will Pendergraft, and I just completed the clinical portion of the joint nephrology fellowship between Brigham and Women’s Hospital and Massachusetts General Hospital. I was inspired for the first time by Nate Hellman during my…
Gearoid did a nice job reviewing the recent exciting findings surrounding primary Focal Segment Glomerulosclerosis (FSGS) and I thought it would be a good opportunity to review some of the sometimes confusing terminology and clinical basics. To start,…
Dr. Arthur C. Guyton (1919-2003) was one of the greatest physiologists of our time. One of Dr. Guyton’s many seminal contributions to medicine was to establish the role of kidneys in long-term blood pressure regulation via a mechanism…
As Nate mentioned in a previous post, the urinary anion gap is helpful in differentiating whether a non-gap acidosis is of renal or extra-renal origin. Urinary Anion Gap = Na + K – Cl Because the major cation…
As has been mentioned in previous post, the identification of the anti-PLA2R antibody has the potential to revolutionize the diagnosis of membranous GN and is already being used clinically on a small scale. It is found in 70%…
The evaluation of a dialysis patient for possible kidney transplantation is a great challenge. On one side, we know that if the patient continues on dialysis, his yearly mortality will be around 20%. On the other hand, kidney…
Various glomerulonephritides unfortunately often require treatment with chemotherapeutic agents, such as cyclophosphamide. A potential adverse effect of these agents in females of child-bearing age, is premature ovarian failure. Nate previously posted about this. Since then, there have been…
Cystinosis is an autosomal recessive disease caused by a mutation in CTNS, which encodes the lysosomal transporter of cystine. Without this, cystine gradually accumulates in cells causing progressive damage. The commonest kind is “nephropathic cystinosis” which is the…