Continued: pma/510(k) #: k191048.Investigation evaluation: our laboratory evaluation of the product said to be involved confirmed the report.The device was returned with the snare head bent and sticking out of the distal end of the sheath.The sheath was severely kinked and damaged at the base of the handle.A function test was not possible, any movement of the handle caused additional damage to the sheath.The continuity from the electrical pin to the snare head was tested with an ohm meter and passed.The sheath is damaged from the base of the handle to about 2 cm on the sheath.The solder on the cannula on the distal end was observed under magnification, the catheter was cut in order to view the distal end properly.The edges on the cannula are visible and the solder around them has been buffed according to the spec.No other anomalies were observed with the device.The device history record for the lot number said to be involved was reviewed.A discrepancy or anomaly was not observed with the product that was released for distribution.Investigation conclusion: a definitive cause for the reported observation could not be determined, because the condition of the device did not allow for a full evaluation.The sheath by the base of the handle was severely kinked and did not allow for advancement or retraction of the snare.A discrepancy or anomaly that could have contributed to the reported observation was not observed during our laboratory analysis of the returned product.The instructions for use contain the following information to assist with proper set-up and use of the device: instructions for use states: "fully retract and extend snare to confirm smooth operation of device." the instructions for use states: "visually inspect with particular attention to kinks, bends and breaks.If an abnormality is detected that would prohibit proper working condition, do not use." "before using this device, follow recommendations provided by electrosurgical unit manufacturer to ensure patient safety through proper placement and utilization of patient return electrode.Ensure a proper path from patient return electrode to electrosurgical unit is maintained throughout the procedure." "inspect the active cord.The cord must be free of kinks, bends, breaks and exposed wires to allow for the accurate transfer of current.If an abnormality is noted, do not use the active cord." "with the electrosurgical unit off, prepare the equipment.Following the instructions from the electrosurgical unit manufacturer, position the patient return electrode and connect it to the electrosurgical unit." "securely connect the active cord to the device handle and electrosurgical unit.The active cord fittings should fit snugly into both the device handle and the electrosurgical unit." "following the electrosurgical unit manufacturer's instructions for settings, verify the desired settings and activate the electrosurgical unit.Note: maximum rated input voltage for this device is 2kvp-p for cut mode and 5 kvp-p for coagulation mode." prior to distribution, all acusnare polypectomy snares are subjected to a visual inspection and functional testing to ensure device integrity.A review of the device history record confirmed that the lot said to be involved met all manufacturing requirements prior to shipment.Corrective action: a review of the complaint history was conducted.The likelihood of occurrence is considered rare.Corrective action is not warranted at this time based on the quality engineering risk assessment.Quality assurance will continue to monitor for complaint trends and reassess the risk assessment results as post market feedback continues to become available.
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During a colonoscopy, the physician used an acusnare polypectomy snare.The plastic sheath curled up by the handle and could not activate [the device].The device did not allow any transfer of electrical power.A section of the device did not remain inside the patient¿s body.The patient did not require any additional procedures due to this occurrence.According to the initial reporter, the patient did not experience any adverse effects due to this occurrence.
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