A device history record (dhr) review was not performed because the results of the complaint investigation do not indicate a problem with the manufacturing of the device or prior repair of the device.A product sample was received for evaluation.Visual inspection and functional testing were performed.No physical damage was observed.The reported device was put on the carbon dioxide (co2) simulator for testing.The device was getting high end-tidal co2 (etco2) reading of 79mmhg.However, the range for testing was set between 70 to 76 mmhg.The technician was able to duplicate the reported issue of high readings.The technician performed the high/low calibration to resolve the reported issue.After calibration, the technician was able to get the etco2 reading of 73 mmhg, which is within specifications.The root cause of the reported issue was determined to be related to the customer/ user interfacing with the product in a manner inconsistent with the instruction for use (ifu).The ifu in the operator manual recommends the user perform high/low calibration every 6 months to ensure that the etco2 and o2 measurements are accurate.No product information has been provided to date.This remediation mdr was generated under protocol (b)(4), as a result of warning letter cms# 617147.
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