The device was returned to zoll medical (b)(4).The device was subjected to full functional testing and ecg testing with no discrepancies found.The device was observed to be functioning as expected.The device was recertified and returned to the customer.Review of the device activity logs for the case in question indicated that the device recognized a patient impedance.However; the ecg signal was not being displayed on the monitor display because the device was left in lead ii view.The end user would need to change the lead view to the pads view in order to obtain the ecg signal from the patient onto the monitor display.The lead can be changed by pressing the lead button, or entering one of the defib modes such as; analyze, energy select, charge or shock.There was no evidence of a device malfunction and the device meet specifications.Analysis of reports of this type has not identified an increase in trend.
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