Tom Doris, KeepUs project founder and technical lead, responds to our recent post [TTA 28 Aug] critiquing Philips Lifeline with AutoAlert’s accelerometer and its possible failure to detect a fall which resulted in the death of a Massachusetts woman. His analysis concludes that accelerometers on their own are surprisingly inaccurate. The false positives/negatives may be minimal but they do exist, and they should not be the only indicator of a fall.

Mr Doris has a PhD in computer science and was formerly an R&D engineer at Intel. Earlier in TTA: 4 Oct 13, 22 July. 

Falling Down is a Surprisingly Hard Problem

More than 250,000 people suffer a hip fracture in the US every year. More than 20 percent will die within 12 months as a consequence of their fall. One in three who lived independently before the fracture will need at least a year of rehabilitation in a nursing home. While rehabilitation methods are improving, the single most important factor influencing the long-term outcome is the length of time between the fall and getting medical attention at a hospital. A few hours more or less makes the difference between life and death.

People are living longer, and current projections make it clear that elderly people will have to live independently in their own homes for as long as possible. You just can’t provide residential care for 20 percent of the population. Smartphones and wearable technology have the potential to dramatically improve eldercare. A relatively cheap smartphone can track activity and location. Modern platforms analyze the data in real-time over the internet and can, in theory, immediately spot when something is wrong and raise an alert.

The theory doesn’t always work however. (more…)