The complainant indicated that the device will not be returned for evaluation; therefore, a failure analysis is not available, and we are not able to determine the relationship between this device and the cause for this event.As part of our manufacturing process, all device history records are reviewed and approved by quality, prior to release of product.If additional information or the sample is received, the investigation will be reopened and responded to accordingly.
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Additional information the device history record (dhr) was reviewed, and no abnormal process conditions were present during the manufacturing of the product that could have led to the issue described by the customer.The dhr review showed that all acceptance criteria inspections per established sampling levels were within acceptable limits during the production process.Because no sample was returned with this complaint, no product examination was possible.The complaint will be reopened if a sample is received at a later date.Photos were provided by the customer.Review of the first and second photos showed one pouch, confirming the lot and product code is the same as the lot and product code submitted with the complaint.Review of the last three photos confirmed the reported issue of skin irritation.These electrodes are one time use and can be used for up to 72 hours at which point should be replaced by a new electrode.Based on the information provided in the complaint, a root cause could not be established.This product family has been tested according to guidelines for biocompatibility that found both the hydrogel and skin contacting foam adhesive to be non-cytotoxic, non-irritating, and non-sensitizing.There have been no design changes to this product within the past year that would contribute to any increased probability for skin irritation on patients.Although this complaint is confirmed, there is no evidence that there was anything wrong in the manufacturing of the device.No complaint trend exists; therefore, corrective and preventative action will be limited to tracking and trending analysis.
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