Scientists Academy

Identify the cell below 👇👇🔬

🧪 Can a very high chloride result be completely fake?

In clinical biochemistry and medical laboratory science, a very high chloride result usually suggests a serious acid-base or electrolyte problem. But there is a striking lab pitfall called pseudohyperchloremia. In some cases, salicylate can interfere with certain chloride ion-selective electrode (ISE) methods and make chloride appear falsely elevated. This can even create a very low or negative anion gap, masking the classic high-anion-gap acidosis expected in salicylate toxicity.

Why does this matter?
Because a false chloride elevation can mislead clinicians away from the real diagnosis. Case reports and review articles show that severe salicylate poisoning may present with apparent hyperchloremia and a normal or negative anion gap purely because of assay interference, not because the patient truly has that chloride level.

🔍 Lab takeaway:
When chloride looks unexpectedly high and the chemistry pattern does not fit, think beyond the number:
• Is the anion gap unexpectedly low or negative?
• Could salicylate interference be affecting the chloride assay?
• Would confirmation on a different platform or direct investigation of salicylate level clarify the picture? Recent nephrology literature emphasizes that salicylate has become a major modern cause of pseudohyperchloremia with Cl-ISE methods.

💬 Question:
Have you ever seen an electrolyte result that looked dramatic at first, but the real answer turned out to be assay interference rather than the patient’s true chemistry?


#الكلوريد #الساليسيلات