DB 1999(02) Emergency service radios and mobile data terminals: compatibility problems with medical devices

Executive summary
This device bulletin covers the impact of radio communications on the safe use of medical devices (including pacemakers implanted in patients) both inside ambulances and at the scene of an accident in the vicinity of emergency vehicles. It extends the guidance in DB9702 "Electromagnetic compatibility of medical devices with mobile communications".

We also consider the possible risks to devices within healthcare facilities, both when emergency vehicles are parked nearby and when mobile data terminals are in use. The latter are transmitting devices which send and receive text messages, and are frequently used by servicing personnel.

We conclude that there is a significant risk of dangerous interference which should be minimised:

• The use of portable handsets and cellphones inside ambulances should be restricted.
• Special precautions are needed if a patient with an external pacemaker is being transported.
• Displaying warning notices, providing staff training, and relocating parking bays are possible actions if risks of interference prove unacceptable when emergency vehicles are parked immediately outside patient treatment areas.
• Caution should be exercised when treating patients with medical devices at the scene of an accident if an emergency vehicle is in the immediate vicinity.
• Mobile data terminals should be subjected to any restrictions which are locally applied to cellphones.