Quality control (qc) results were unacceptable after installation of multiple lots of roche diagnostics cobas chloride electrodes (cat # 03246353001).Roche sent a product bulletin on (b)(6) 2018 (tp-00394; chloride electrodes - discontinue use of certain lots).However, we have observed this qc issue on numerous lots not listed in the product bulletin.Chloride electrode lots which did not pass qc criteria at our institute include: a2072, b0625, b0094, a3760, w5233, x1881, x1882, x6230, y7004, y7200, and y8413.Affected electrodes were not placed into clinical use by our lab, therefore no pt results have been affected at our facility.
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