The hemoconcentrator sample was returned with the original tubing and drain plug still attached.The unit was decontaminated with 10% bleach solution and visually inspected was done from the provided photographs.No damage or defects were observed on the exterior of the hemoconcentrator.The certificate of conformance (coc) was reviewed for this component and the component was deemed conforming by the supplier.Lot number of the convenience kit was not provided, thus device history record (dhr) review could not be performed.The hemoconcentrator was then shipped overseas to our supplier for further investigation.When testing was initiated a fiber leak was discovered and further testing could not be done regarding the reported failure mode of the blood flow ceasing.It is suspected that the fiber leak started after initial use perhaps during transport back to terumo from the customer.There is no cause and effect relationship between a fiber leak and the reported issue of the blood flow ceasing.The root cause of ceased flow could not be determined.All available information has been placed on file in quality management for appropriate tracking, trending and follow-up.(b)(4).
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This follow-up is submitted to the fda in accord with applicable regulations - and as indicated by terumo cardiovascular systems corporation in the initial report submitted september 14, 2018.Upon further investigation of this reported event, the following information is new and/or changed: (b)(4).The sample was initially tested and saline solution was circulated through the blood phase.It was noted that there were pressure values much higher than typically seen which indicated blockage in the sample.The supplier surmised that the actual sample had been clogged with clots generated inside the fibers.It was discovered that there was leakage coming from broken fibers on the hc05.The leakage was large enough in volume that it prevented further performance testing from occurring.The supplier additionally performed a leak test review, complaint review and dhr review of the component part/lot number combination and could not find any issue or discrepancies with the component part/lot number combination.The hemoconcentrator instruction for use (ifu) indicates that "less than 100ml/min blood flow may cause blood coagulation in the device, and "adequate heparinization of the blood is required in order to prevent it from clotting in the system." all available information has been placed on file in quality management for appropriate tracking, trending and follow-up.
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