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A hemodialysis (hd) clinic biomedical technician (biomed) reported to fresenius customer service low a lot of naturalyte had low conductivity.Upon follow up, the biomed stated that before use, the conductivity was at 13.0.There were no patients that were treated with this lot.Per the biomed, there are 2 cases that are affected.They clinic used naturalyte bicarbonate 45x, lot number 20lxbc010.There has been no recent service to the machines.A return goods authorization (rga) was issued to the clinic for product return.
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Plant investigation: a product history review was performed.A review of the complaint management system identified 1 additional complaints related to conductivity issues with the reported lot.A review of the product inventory records for lot no.20lxac086 indicated that (b)(4) of finished product were manufactured for distribution with no noted nonconformances.After reviewing the finished product release summary, it was determined that 20lxac086 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 20lxac086 did not meet release specifications and the allegation conductivity low was confirmed.In conclusion, 20lxac086 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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