Invited Commentary-Exploring patterns of personal alarm system use and impacts on outcomes

[Extract]
Personal emergency response systems can be categorised as wearable sensors, ambient sensors and vision (camera)-based systems.1 The most common type available is wearable devices typically worn as a pendant or a wristband. While the first systems were marketed in the 1970s and the technology is now far superior, the basic principles remain the same. The user pushes a button which alerts a call centre (or similar) which activates a response. A response may consist of assistance over a monitor or phone, or contacting a third person such as family, or referral to emergency services. This system is particularly useful for people who live alone who are at risk of a fall or concerned about a recurring medical condition. Given the large number of older people now living alone, and advances in technology, such systems have, and continue to have, the potential to support independent living in the community.