This follow-up report is submitted to fda in accord with applicable regulations ¿ and as indicated by terumo cardiovascular systems in the initial report submitted to the fda on may 10, 2019. upon further investigation of the reported event, the following information is new and/or changed: g4 (date received by manufacturer).G7 (indication that this is a follow-up report).H2 (follow-up due to additional information).H6 (identification of evaluation codes 4114, 3221, 67, 4315).Method code: 4114 - device not returned results code: 3221 - no findings available conclusions code #1: 67 - no problem detected conclusions code #2: 4315 - cause not established the affected sample was not returned for evaluation.The lot number was not provided; therefore, a retention sample could not be obtained and evaluated.The likely root cause is that the buffer solution was not completely wiped off the product after buffer fill during manufacturing.Without the returned device, a definitive root cause was not able to be determined.All available information has been placed on file in quality management for appropriate tracking, trending, and follow-up.
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