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This report has been identified as b.Braun melsungen ag internal report # (b)(4).We received 1 used and emptied easypump ii lt 270-27-s.As received condition, clamp clip of received sample was unclamped.Patient connector was not connected to the original wing cap.Visual inspection had done throughout the sample.Folded outer shell was observed on the sample.The sample was unfolded and decontaminated.Then the sample was sent for flow rate test.The flow rate deviation from nominal flow rate for received sample was -4.12%.The flow rate of received sample was within the specification ±15% deviation from nominal flow rate.Fast flow rate as per customer description could not be identified.Folded outer shell was observed during bmi investigation.According to ifu, the outer layer must be unfolded properly prior filling.Folded outer shell will act as the external pressure to elastomeric membrane and increase the flow rate of the product.Hence, the fast flow rate observed by customer is highly possible due to the folded outer sleeve.Besides that, there are some possibilities that to cause the fast flow rate to occur during application, such that one or combination factors are listed as below: factor 1 temperature the temperature of the surrounding will affect the flow rate of the sample.For every increase of 1°c, the flow rate of the sample will increase approximately by 3%.For example, if the flow restrictor of the product reaches the temperature of 37°c, the flow rate of the sample will increase by approximately 18% which means the flow rate will increase from 10ml/hr to 11.8ml/hr.Factor 2 external pressure: external pressure such as squeezing or laying on the pump will increase the flow rate which cause the pump to empty earlier than the nominal time.Simulation of external pressure had been conducted.The flow rate of the product can increase when external force is applied to the pump.However, this external force is against the intended use of the product according to ifu.Summary of root cause analysis: since the flow rate of received sample was within the specification, hence we considered this complaint as not confirmed.Folded outer shell was observed on the complaint sample and the complained fast flow rate is highly possible due to the folded blow mold which act as external pressure to the elastomeric membrane.Cause: defect due to wrong handling (referring to application error or off-label use).Device history record (dhr): reviewed the dhr for batch 21l11ge221, there is no abnormality and no such defect detected at in process and at final control inspection.
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