This is an article in press in AJKD. Thanks to Dr. Goldwasser again for making me a part of this.
This is about an interesting scenario we came across where the (measured) serum bicarbonate and calculated (blood gas) bicarbonate were consistently discrepant despite excluding all known possible causes. Interestingly enough, the patient also had pseudo elevation of troponins. The cause likely secondary to an interferent in the assay.
Here is the article