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A user facility biomedical technician (bmt) reported via fax that the hemodialysis (hd) machines are having conductivity issues with the use of naturalyte.Upon follow up, the customer said that during treatment, the conductivity was at 12.9 ms/cm, however the theoretical conductivity value (tcd) was set to 13.5 ms/cm.The patient was switched to another lot of naturalyte mid-treatment without any ill effects or adverse events.Five cases were affected.He has not been in touch with customer service to return any affected product.No repairs to the machine.They use naturalyte bicarbonate lot 20hxbc010.
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Plant investigation: a product history review was performed.A review of the complaint management system identified 2 additional complaints related to conductivity issues with the reported lot.A review of the product inventory records for lot no.20nxac035 indicated that 6761 cases of finished product were manufactured for distribution with no noted nonconformances.After reviewing the finished product release summary, it was determined that 20nxac035 met release specifications.As of 11/20/2020 no samples were returned.Samples are not needed to confirm the allegation.Through other complaint allegations of the same issue for lots 20lxac056, 20lxac058, and 20lxac076, there were companion samples available for testing which were tested at both the oregon and irving laboratories and results were found to be conflicting.Due to the conflicting results found between the laboratories, the oregon test methods were reviewed and a deficiency was found in the test method pertaining to the sodium and potassium analyte tests.Because of the deficiency found in the test method, it was determined that lot 20nxac035 did not meet release specifications and the allegation conductivity low was confirmed.In conclusion, 20nxac035 release testing was found to be compromised due to the deficient test method.A non-conformance was opened for allegations of conductivity issues and escalated to a corrective action preventative action (capa).Based on the investigation performed, cause was traced to manufacturing.
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