The customer reported to olympus, the subject device broke during a diagnostic endobronchial ultrasound transbronchial needle aspiration.The physician had difficulty deploying the needle into a lymph node.Then, the sheath was retracted into the bronchoscope and the staff noticed the tip of the needle was missing.The intended procedure was completed with a similar device.Another bronchoscopy and x-day did not reveal the needed tip inside of the patient.The patient did not have an extended hospital stay per the customer.No additional information was provided.
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This supplemental report is being submitted to provide the device evaluation and results of the legal manufacturer¿s investigation and the results of the device history records (dhr) review.The subject device was returned for evaluation.The lot number was determined to be 17k02.There was no buckling or deformation at the insertion site.The needle tube tip was broken at a position about 15 mm from the tip of the needle tube.The broken needle tip was not sent.There were no issues identified when checking the protrusion and pull-in of the needle tube.The broken section of the needle tube appeared to be caused by a bending load not brittleness.The dhr for this device were reviewed and all records indicated the product was manufactured according to all applicable procedures and met final product release criteria.No abnormalities were found.A definitive root cause was not identified.Based on the available information, the legal manufacturer determined the probable cause of the failure is likely due to: a bending force was applied to the needle tube when piercing the hard body tissue during the procedure.This caused the needle tube to bend excessively.When the needle slider was pulled, a force was applied to the needle tube in a direction to make it straight.This caused the needle tube to break.The instruction manual contains the following descriptions, and it warns against this event.When inserting the instrument into the endoscope, the distal end of the needle tube may be bent.When piercing the target, confirm the distal end of the sheath and needle tube in the endoscopic field of view and/or ultrasound image while considering such bending.Otherwise, patient injury such as perforation, bleeding, or mucous membrane damage may occur.Do not try to straighten a bent or deformed needle with your hands because the needle may break.Use a spare needle instead.
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