Siemens has asked the customer if they are able to provide the patient sample, some test packs of lot # 075110 and if they are willing to send the instrument back for investigation.The customer has declined the requests.The customer stated they are operational.Without any product returned to investigate, or the customer's ability to reproduce the false negative situation again on lot 075110, the root cause can not be determined.The certificate of analysis for hcg lot 075110 was reviewed and it met all specifications prior to manufacturing release.An investigation will not be performed for this event.The customer stated that there is an indication of an operator technique problem because they have been seeing a lot of insufficient sample errors.
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