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¿ the patient is in end stage renal failure and is taking apixaban, calcitriol, cinacalcet hcg, docusate sodium, lavetiracetam, lanthanum carbonate and pantoprazole sodium.¿ beckman coulter applications specialist escalated to medical affairs.Medical director discussed with customer about possible drug interactions and false hcg results related to heterophilic antibodies and recommended to send samples to the complaint handling unit chu for interference testing.¿ the sample was tested by the chu on (b)(6) 2024 and no interfering substances were found.¿ per the access total bhcg 5th is instructions for use (ifu) b29061 l, it states: the access total hcg (5th is) results should be interpreted in light of the total clinical presentation of the patient, including: symptoms, clinical history, data from additional tests, and other appropriate information.- if the total hcg result is not consistent with clinical presentation, results should be confirmed by an alternate hcg method or a urine-based assay.In conclusion, the testing did not confirm that a patient source interferent was the cause of the elevated results.A cause for this event could not be determined.There is evidence of a malfunction of the assay as the access results are discordant to a different methodology and the patient's clinical file.
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