This complaint is being reported by zimmer biomet as (b)(4).This follow-up report is being submitted to relay additional information.The following sections were updated or corrected: 510k number: k081047; k123188; k133786.The ultra duo high fluid cart, : smoke evacuator was manufactured on 2 may 2013 and was 41 months old at the time this complaint was generated.The device history record (dhr) review 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.The device was noted to have not been previously repaired by zimmer biomet surgical.Steven m.Hyatt was contacted about the cart and dispatched a service technician to be at the site.On 1 december 2016, the technician arrived at the site and confirmed that the cart was reading the proper fluid level for one of the cylinders.The technician replaced a level sensor and then verified that the cart was functioning as intended.He then returned the cart to service without further incident.The device was tested, inspected, and repaired.The root cause could not be specifically determined since the service technician was unable to reproduce the reported event.The root cause of the cart reading the incorrect fluid level also could not be specifically determined, but was most likely due to a level sensor wearing down over the 41 months that the cart had been in service.Neither of the level sensors had been previously replaced and could have begun to malfunction such that they would begin to send erroneous signals to the cart.The cart could then interpret these signals as a different fluid level inside of the cylinder than what is actually present.When the customer would then attempt to use the cart, the incorrect fluid level would then cause the cart to not function as intended.
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