This report is being filed to provide additional information.Investigation: a review of the device history record (dhr) for this unit showed no irregularities during manufacturing that were relevant to this issue.The run data file (rdf) was analyzed for this event.According to the version 6.0 trima accel system administrator's guide, the tbv is less than the maximum allowed ac infusion rate of 1.2 ml/min/l tbv for a 52 minute procedure, and it is unlikely that an ac over-infusion occurred due to the plasma product being diverted back to the donor due to a potential plasma occlusion or air block.Root cause: a definitive root cause for the low volume and additional anticoagulant to donor could not be determined.Rdf analysis indicates that an occlusion or air block was occurring to cause the low volume.Possible causes for the air block or occlusion include, but are not limited to, a kink, obstruction or misload of the disposable set.
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