Case Studies

CPR Coach Cell Phone Application

Investigate and design a demo to show how correct CPR technique can be monitored by a cell phone with a built-in accelerometer.

Description

Problem

The company wanted to be able to provide a demo of the "future of CPR" that shows that their algorithms for monitoring CPR compression depth can be implemented on cell phone. The company did not know if the demo would be feasible given the hardware constraints and sampling rate constraints of cell phones with built in accelerometers.

Solution

Sony Ericsson W910i

In 2007, BCA chose the Sony Ericsson W910i cell phone as a platform for the CPR COACH demo because it has a built-in 3-axis accelerometer and provided a Java development platform that supports mobile sensors. A Java application was designed that utilized some of the company's CPR algorithms in order to create the demo. The utilized algorithms were ported from "C" to Java. The sampling rate of the W910i was only one fifth of the sampling rate in the company's CPR Coach hardware. Because of this, BCA implemented an additional recovery phase detection algorithm to make the demo feasible.

Apple iPhone

In the spring of 2008, Apple released the beta version of the iPhone Software Development Kit (SDK). Because the iPhone does not have the constraints encountered with the Sony Ericsson W910i, it is a much more straight-forward port of the company's CPR Coach software. BCA is currently working on development of this iPhone application.

Client Bio-Detek, Inc.

Year Completed 2008