A product sample was received for evaluation.Visual and functional testing were performed.The monitor was powered up and 10% gas was applied and it read 70 mmhg, performed a hi/lo calibration and the reading came in at 74 mmhg which is right on for the day, customer to perform a hi/lo calibration every 6 months like instructed in the manual.The flowrate rate was checked and it read 92 ml/min which could also contribute to erratic readings so the sleep pump was replaced.The failure resulted from co2 bench drifted out of calibration due malfunctioning co2 pump no longer drawing adequate airflow through the pneumatics.This monitor was last serviced about 1 year ago where the co2 pump was replaced to meet specification.Further device history review (dhr) is not relevant because the results of the complaint investigation do not indicate a problem with the initial manufacture or prior repair of the device.The complaint was confirmed.The root cause of the reported issue was found to be device out of calibration and defective pump.The device was calibrated and the sleep pump was replaced.Operator of device is unknown.Initial reported also sent report to fda is unknown.No information has been provided to date.This remediation mdr was generated under protocol (b)(4), as a result of warning letter cms# (b)(4).
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