A false elevation of serum chloride can be seen with a number of conditions. The presence of pseudohyperchloremia may be associated with a negative anion gap.
The most common cause of pseudohyperchloremia is bromide intoxication.
Other causes of pseudohyperchloremia:
(1) sodium nitrate ingestion
(2) ingestion of bromvalerylurea
(3) salicylate intoxication
(4) iodide ingestion
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