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 july 30, 2018.(b)(4).A sample was not returned for evaluation; nor were any pictures provided.A retention sample from the affected p/n and lot # combination was obtained, visually inspected and leak tested.No anomalies were found.A thorough investigation of this complaint cannot be performed, and a definitive root cause of the reported incident cannot be determined.It is likely that during the setup of the circuit, the connections made with the shunt sensor were not completely tightened or closed, causing them to leak.Another possibility is that during the gas calibration, when the large luer cap was loosened, it had not been retightened prior to use in the line, causing a leak from the cap.All available information has been placed on file in quality management for appropriate tracking, trending, and follow-up.
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