Procedure: knee replacement ((b)(6) 2015).Cathplace: posterior knee capsule.It was reported that a catheter break occurred upon removal with a piece retained inside the patient.The nurse was told to remove the catheter prior to a second planned knee surgery.The nurse met resistance and then used force to continued to pull until the catheter broke.The nurse notified the physician and at the time of this report, there was no plan to remove the retained piece of the catheter.The broken catheter sample is available for return.Additional information was received on 08/17/2015.It was reported that the patient did not express any discomfort at the time of the catheter removal.Approximately 4 inches of the catheter is retained inside the patient.There were no devices used to remove the catheter, only manual force was exerted.The catheter appeared stretched after removal.
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Method: a visual inspection, catheter tensile strength testing, photographic images and a microscopic inspection was performed on the returned device.Results: a visual inspection found that a silver-soaker catheter was returned not fully intact.It was missing the black catheter tip and the infusion segment.There is a kink approximately 8.3¿ distal to the catheters female hub, also a kink at the 1st marking.The diameter of the broken portion was measured to be 0.022¿.The non-attenuated part was measured to be 0.043¿.The silver-soaker catheter was examined under a microscope magnified and there were no signs of brittleness.Tensile strength testing was performed on the silver-soaker catheter.The result for the catheters mid-body segment was 12.160(lbf).The passing rate for the test is >2.8(lbf) at the infusion segment and >4.00 (lbf) for the mid-body segment.The tensile strength was not performed on the infusion segment because it was not returned.The catheter met specifications during the tensile strength test and no additional testing was performed.Conclusion: the investigation summary concludes that the silver-soaker catheter was received not fully intact, it was missing the black catheter tip and the infusion segment.Evidence revealed that stretching was observed where the breakage occurred.Tensile strength testing was performed on the mid-body segment and it met specifications.It was reported that there was some force applied after resistance was met when removing the catheter.They continued to pull and the catheter broke.The ifu and the technical bulletin state if catheter stretches stop, because continued pulling could break the catheter.Root cause was determined to be the incorrect use by the user as using excessive force >4.00(lbf) on the catheter at the mid-body segment >2.8(lbf) or at the infusion segment will cause it to break.The technical bulletin ( tips for preventing in-situ catheter breakage with the on-q* pain relief system, mk 00021) and instructions for use (on-q* catheters and introducers (14-60-602-0-04)) was sent to the customer with their closure letter.This incident has been included in our complaint handling database, which is actively monitored and trended.
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