This event has been recorded by zimmer biomet under (b)(4).This mdr is being submitted as an initial/ final report.The device history record (dhr) for ultra duo flex fluid cart serial number (b)(4) was reviewed and noted no related non-conformances, requests for deviation (rfd), change notices (cn), or any other issues with manufacturing.The dhr review found no issues with the device and all verifications, inspections, and tests were successfully completed.Using crm to query for serial number (b)(4), the device was noted to have not been previously repaired by zimmer biomet surgical.On (b)(6) 2018, it was reported from (b)(6) that a unit had cylinder #1 multiple tandem errors and cylinder #2 was not reading fluid volume from cases.Replite was contacted about the cart and dispatched a service technician to be at the site.The technician arrived at the site and confirmed that the a/d values on both cylinders were not reading properly.He replaced the level sensors (part # 91584, lot code 0027604) (part # 91584, lot code 0028004) in each cylinder and then verified that the cart was functioning as intended.The technician then returned the cart to service without further incident.The device was tested, inspected, and repaired.Service work order (b)(4) on 25 july 2018.The root cause for the unit issuing tandem errors on cylinder #1 and not reading fluid volume on cylinder #2 was due to a malfunctioning level sensor in each cylinder.The level sensor is responsible for measuring the fluid levels in the cylinder, and a malfunctioning level sensor could issue tandem errors or not allow the unit to measure fluid volumes.The reported event was confirmed during inspection of the device and the device was noted to be functioning as intended after the level sensor in each cylinder was replaced.The investigation was based on the information that was provided initially and any information that was obtained throughout the follow-up process.Device evaluated by external contractor.
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