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Manufacturing record review: review of records for lot m-211119-02 did not reveal any anomalies.Manufacturing inspections consist of 1) a subassembly visual inspection to verify that the two tc wires on the inconel coil (heating coil) are not in contact except for the weld (wi0050 rev 07 step 1.11); and 2) a finished device test to verify the coil thermocouple increase at least 10°c after the rf generator outputs 10 watts for 15 seconds and holds for an additional 15 seconds (wi0065 rev 10 step 3.18, per ps0052 rev 02 6.1.8.1.6).Incoming inspection review: incoming inspection record review not applicable to this investigation.Service history record: service history not applicable for this product.Historical complaint review: two reports of alert 176 have been investigated to date.During the investigation the devices performed per specification; no device defects were identified but visual observations were noted in one instance.11: no device defect [but space between tc leads observed] (2021-06-0000260).1: no device defect for two vapor probes (2022-03-0000181).There is also one other reported alert 176 complaint, (b)(4), associated with this same case.Product receipt: product was received on october 11, 2022.Visual evaluation: product was returned in tray.There was no evidence the device had been inserted into the patient, the shaft and tip were clean.Saline was present inside the syringe and the syringe check valves exhibited minor corrosion, as expected, after being subject to saline for an extended period of time.Functional evaluation: the probe was connected to an inspection station equivalent to the handle sub-assembly final inspection workstation (a cartridge conduit adapter (tl0264) connected to the fiso iqc hardware (tl0185) and fiso iqc software (tl0186)) to read and record the probe's eeprom data.Alert 176 is triggered during the vapor probe test if the thermocouple on the coil does not increase by at least 5°c when 20 watts of rf energy is applied for 2 seconds.This is a safety test conducted prior to device introduction into the patient to confirm rf energy is applied to the coil and the thermocouple is operational.The test can be repeated at the discretion of the user.Ultimately, failing the test requires replacement of the probe.During vapor delivery, the thermocouple functions as a safety monitor.If excessive coil temperature is detected, vapor delivery will be terminated.Case telemetry was provided and reviewed.It confirmed that the temperature increase was <5°c in each attempt.In order to evaluate the vapor probe using a console, the eeprom was reset and the used syringe was replaced with ones that did not have corroded check valves.The probe was connected to console (dv10) to attempt to perform a simulated use procedure.Simulated use was not able to be completed because alert 176 occurred during the vapor probe test, confirming the reported complaint condition.It was tried multiple times with the same result.The handle was then disassembled to check the thermocouple condition.The thermocouple was welded to the coil, but the two leads were not in direct contact with each other.They should be touching for proper response to temperature inputs.(note, this welding process is performed by the inconel coil manufacturer, resonetics, and not during vapor probe manufacturing at aegea.) to confirm the gap was the cause of the slow temperature rise of the thermocouple, the thermocouple leads were removed and then re-soldered (not laser welded, as done by the manufacturer) to the coil, ensuring the ends of the leads were in contact.The solder is visually messier than the laser weld, but the tips of the thermocouple are in contact.The result was that the vapor probe test passed; the thermocouple increased >5°c and no alert 176 occurred.The user's observation regarding saline on top of the console in the area of the syringe connection could not be confirmed.The cooper representative commented in the complaint that they did not see, nor were able to replicate a saline leak of any kind.Root cause the root cause of the complaint condition is manufacturing.The thermocouple was not optimally installed on the coil.Corrective action this is the first confirmed issue of this kind.The inconel coil part specification (pt0057-02) will be updated to clarify the requirements for the position of the thermocouple leads.The manufacturer will also be notified.
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