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Anion Gap: Na - (Cl + HCO3) = normally around 10-12
good to know. I keep looking up the urine values but all it said was "varies", then I threw my computer and yelled "does that vary Mother F****ers. I do feel better now.
glad I wasn't the only one who got very pissed off at the urine values
Usually the first thing I look at is whether or not the Cl- is high. Generally if the Cl- is high its going to be a normal gap
i think they gave you the urine values bc you can calculate the URINE anion gap which is (Na + K - Cl). In this case the Urine Anion Gap is positive (5). Boards and Beyond mentions that a positive UAG is due to Renal Tubular Acidosis Type 1 (inability of alpha intercalated cells to secrete hydrogen ions). just another approach to answer this q
Actually diarrhea is the "D" in "HARDASS"(reason why I was stuck between Chron's and RTA). Ended up getting it right with RTA..
So the reason this is not Crohn's disease is actually what BnB explains in Renal Tubular acidosis video. Anytime there is a Metabolic Acidosis with intact kidney secretion of H+, the URINARY Anion gap (Na+K-Cl) is NEGATIVE. This is because the excess NH4 that is secreted into urine is combined with Cl-. Therefore, in Crohn's disease and Type 2 Renal Tubular Acidosis, the urinary anion gap is NEGATIVE.
In this question, the urinary anion gap is POSITIVE so this would be an example of Type 1 RTA because the kidney can not excrete H+.
I got it right by chance, definitely did not understand it in this much detail when I was answering it lol