You don't need the failed sample or lot number to investigate a failure. These are helpful to the manufacturing side of the investigation, but it's the clinical side that is key from a regulatory, rather than a QMS, perspective. I would investigate as needed to determine the clinical circumstances and consequences of the failure, eg:
Was the product in clinical use (or being readied for use) at the time it failed? If so, how did the failure affect the clinical procedure that was in process at the time? Did this have any impact on the patient? If so, what was that impact and how was it resolved? If it didn't fail during clinical use, could it have done so? In that case, same questions.
The main bar to the clinical side of the investigation is that the healthcare provider won't respond to your questions. As a general rule, I like to see three documented efforts to get them answered (date and time of phone call, or an email is fine) in the complaint file.
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Julie Omohundro, ex-RAC (US, GS), still an MBA
Principal Consultant
Class Three, LLC
Durham, North Carolina, USA
919-544-3366 (T)
434-964-1614 (C)
julie@class3devices.com------------------------------
Original Message:
Sent: 21-Feb-2017 07:06
From: Anonymous Member
Subject: Complaint Investigation
This message was posted by a user wishing to remain anonymous
I am looking for some advice. What steps would you take to investigate a complaint if the complaint sample is not available for investigation and the lot/serial number is unknown? The complaint involved the failure of a component. The customer ordered the replacement part and replaced it themselves. Your thoughts are appreciated.