A distributor reported that a user facility had performed a thermage treatment on a patient.The patient experienced blisters on both eyelids and hyperpigmentation on the second day.The patient was given topical anesthetics, epihemp compound lidocaine.Solta medical branded cryogen and a sufficient amount of coupling fluid was used with the highest level of treatment at 4.0.Treatment to the patient¿s eyelids was started and on the 5th pulse delivery, an event code occurred indicating the tip may be too cold.The tip was removed and reinstalled until the event code went away.The event code returned again however the treatment was not stopped and following completion of the eyelids, it was noted the patient¿s eyelids looked white so they were immediately given burn ointment.The treatment tip was inspected prior to the procedure and during every 50-80 pulses with no discrepancies observed.Pictures of the patient were reviewed and post inflammatory hyperpigmentation was visible on one eye lid but no injury was seen on the other.The patient had not received any other treatment on the procedure day or within 30 days prior in the same symptom area.The current status is reported as blisters recovered with scabs.
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The data log and treatment tip were returned for evaluation.The data log showed many user related errors had occurred during treatment.Errors indicate a recoverable problem that requires operator intervention.If the error occurs during a radio-frequency (rf) treatment, the rf delivery will be stopped, then a post-cooling step will be completed prior to generating an ¿error tone¿ and displaying the event code and event message.After the error tone, the system will transition into "action required" mode and will display text with instructions for the operator indicating what action may be required to resolve the issue.Based on available information, the handpiece and system performed as expected.The reported temperature event code was likely due to the user tilting the handpiece causing uneven cryogen delivery to the patient.The treatment tip passed flow, leak and, thermistor testing however it failed visual inspection.A dent was found on the tip membrane but it''s unlikely this contributed to the patient injury.A review of the manufacturing records showed all requirements were met.The lot history, trend analysis, risk analysis and/or directions for use review were considered acceptable, with the product performing within anticipated rates.No corrective action required.Final test verification specifications were acceptable.No non-conformities or anomalies found related to this complaint when reviewing the device history record for the serial/lot number.Based on the available information, no causal factors can be determined and no conclusion can be drawn.According to thermage cpt system technical user¿s manual, burns and blisters, are known possible patient reaction to thermage cpt treatment.The procedure may produce heating in the upper layers of the skin, causing burns and subsequent blister and scab formation.
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