The batch file was assessed and no defects were detected in production (tensile strength were compliant).We received additional information from hospital on the (b)(6) 2020.The product was sent to another manufacturer by mistake.It explains why we didn't receive the information sooner.The returned device has been analysed: the catheter has lost its mechanical elasticity.It can no longer be compressed or stretched normally.It has become fragile.Moreover it can be seen that the catheter is bent at the connector outlet.This is an irreversible plastic deformation.Catheter breakage is a known incident for lumbar catheters but we have never received similar complaints for ventricular catheters.This phenomenon is symptomatic of prolonged contact with an iodinated disinfectant such as betadine®.Therefore ventricular catheters from the same batch were tested to check impact of bétadine on catheter properties.First test was performed using betadine applied 4 times a day on the catheter during several days but the test was eventless on the catheter.A second test was performed to reproduce hospital procedure every 2 days: betadine application, saline flushing, compress drying, betadine application, dry compress fixed with plaster and bandage around the compress in addition, to reproduce constraints applied on the catheter (from patient or users), catheter was placed in tensile strength equipment and 3000 to 5000 tensile cycles were applied per day during 14 days.In this conditions, catheter breakage was observed.It is therefore highly probable that catheter has been weakened due to a combination of several events: exposure of the catheter to povidone-iodine in a confined, poorly breathing environment.Repeated mechanical stress during use.Bent of the distal part of the catheter connected to luer connector which increased mechanical stress.Weakened catheter broke where stress was applied by connector.This situation is an isolated incident which occurred only at (b)(6), despite the use of this product over a few years without noticing any equivalent phenomenon.Among others, the contribution of a user mishandling during patient care cannot be ruled out in the root causes analysis.
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