Plant investigation: no parts were returned to the manufacturer for physical evaluation.
Additionally, no on-site evaluation was performed by a fresenius field service technician (fst).
A records review was performed on the reported serial number.
An investigation of the device manufacturing records was conducted by the manufacturer.
There were no non-conformances, or any associated rework identified during the manufacturing process which could be related to the reported event.
In addition, the device history record (dhr) review confirmed the results of the in-progress and final quality control (qc) testing met all requirements.
The investigation into the cause of the reported problem was not able to be confirmed.
A definitive conclusion regarding the complaint incident cannot be reached without a physical examination of the complaint device.
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A user facility biomedical technician (bmt) reported that a 2008k2 hemodialysis (hd) machine experienced a flow inlet error, high transmembrane pressure (tmp), and a saline bag backfill.
The bmt verified there was no patient involvement associated with the reported issues.
Upon further inspection of the machine, the bmt discovered that one of the ball bearings in the arterial hansen connector was missing.
This was generating blockage on the arterial side of the dialysate, and effectively pushing the saline back into the bag.
The machine was in the priming phase when this occurred.
User error was not a contributing factor.
The machine had over 20,000 hours on it at the time of the event.
The machine did not give any filling programs.
The bmt confirmed the machine had upgrades for the changes being effected (cbe) completed, and verified that the drain line length and height were within specification.
A quick disconnect is reportedly used on the drain line.
To resolve the reported issues, the bmt replaced the arterial hansen connector.
The machine was subsequently returned to service.
A provided photograph of the hansen connector showed that one of the ball bearings was missing, just as described.
The used part was not available to be returned for evaluation.
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