The customer reported that the multi-gas unit gives low readings, and shows artifact wave forms and unusual breath rates.The device was returned to nihon kohden, evaluated, and the reported issue was confirmed.The unit had noisy wave forms (artifacts) and was making a loud buzzing sound.The internal gas unit was replaced to fix this issue.All functions were tested per service manual after the repair.The repaired unit was returned to the customer.Nihon kohden will submit a supplemental report in accordance with 21 cfr section 803.56 if additional information becomes available.
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