Philips HeartStart MRx Monitor/Defibrillator Models:M3535A, M3536A, M3536M, M3536MC, M3536M4, M3536M5 The HeartStart MRx is for use for the termination of ventricular tachycardia and ventricular fibrillation. The device is for use by qualified medical personnel trained in the operation of the device and qualified by training in basic life support, advanced cardiac support, or defibrillation. It must be used by or on the order of a physician

MRx Defib can be susceptible to one or both issues: 1. The C02 Inlet Port associated with end-tidal carbon dioxide (EtCO2) monitoring on MRx Monitor/Defibrillators can be pushed into the MRx housing, making it inaccessible. 2. The handle can separate from the MRx housing due to breakage of mounts on the rear case.

Philips Heatlhcare issued on November 19, 2014, an Urgent Medical Device Correction notification/Field Safety Notice. The Urgent Medical Device Correction notification/Field Safety Notice informs customers of the issue, identifies details of the units affected, gives instructions on actions to be taken by the customer and identifies what action Philips plans to take to remedy the issue. A software upgrade will be provided free of charge for all units affected by one or more of these issues. A Philips Healthcare representative will contact customers with affected devices to arrange for installation of the upgrade. Philips is asking customers to follow the Action to be Taken by Customer/User section of the Urgent Medical Device Correction notification/Field Safety Notice: You can continue to use your MRx prior to receiving the hardware upgrade provided you follow the steps given. For questions regarding this recall call 978-687-1501 Customers with questions were instructed to contact their local Philips representative.