A discordant falsely elevated free prostate specific antigen (fpsa) patient sample result was obtained on a dimension vista 500 system.The result was not reported to the physician(s).The same sample was reprocessed on the same date and a lower result was obtained and reported.The customer sent out the patient's sample to a reference laboratory for testing using a non-siemens methodology.A lower result, considered correct, was obtained and reported.There were no known reports of patient intervention or adverse health consequences due to the discordant falsely elevated fpsa result.
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