This event has been recorded by zimmer biomet under (b)(4).The previous repair report for ultra duo flex fluid cart serial number (b)(4) was reviewed and noted no related non-conformances, requests for deviation (rfd) or any other issues with the repair.The previous repair report review found no issues with the device after repair and all verifications, inspections and tests were successfully completed.On 18 june 2019, it was reported from (b)(6) hospital that a duo cart unit was not reading the fluid level in either cylinder correctly.On 18 june 2019, replite was contacted about the cart and dispatched a service technician to be at the site.The technician arrived at the site and confirmed drain errors on cylinder 1 and 2 after checking the error log.He found a hydrophobic filter inside cylinder 1 which was causing the volume reading issues.He also used the clot buster to clear both cylinders to clean any bioburdens, and then verified that the unit was functioning as intended.The technician then returned the unit to service without further incident.The device was tested, inspected, and repaired.Service work order (b)(4) on 18 june 2019.The root cause for the unit not reading fluid levels correctly was due to the presence of a hydrophobic(manifold) filter in cylinder 1 and bioburden in both cylinders.The manifold filter can fall out of the manifold after hardening post-use, and this would cause the unit to be unable to read fluid levels correctly and issue the discovered drain error.In addition, the presence of bioburden in the cylinders could obstruct the drain and valve pack, again making the unit issue drain errors and affecting its ability to read fluid levels.The reported event was confirmed during inspection of the device and the device was noted to be functioning as intended after the hydrophobic filter was removed and bioburden cleared with clot buster.The investigation was based on the information that was provided initially and any information that was obtained throughout the follow-up process.
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