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New App for Faster, More Accurate Measurement of Respiratory Rate


A new smartphone app can accurately measure respiratory rate in children in just under 10 seconds - six times faster than the standard manual method.
This simple but innovative piece of technology is a big step towards better diagnoses for children with pneumonia and other respiratory illnesses, researchers said.
Researchers at the Child & Family Research Institute (CFRI) at BC Children's Hospital and the University of British Columbia developed the app called RRate that can reliably measure respiratory rate in an average of 9.9 seconds.
Currently, health care workers typically measure respiratory rate by counting a patient's breaths for 60 seconds using a stopwatch.
"Mobile phones are changing how we administer health care, especially in rural settings and developing countries where access to medical devices is limited," said Dr Walter Karlen, who co-led the study with Dr Heng Gan.
"With this app, we can give health care workers with few resources faster and more accurate measurements, help them make better decisions, and give them more time with their patients," Karlen said.
Pneumonia is the leading cause of death of children worldwide according to the World Health Organisation. With timely and accurate diagnosis, children with pneumonia can often be saved with simple interventions such as antibiotics.
RRate allows workers to measure respiratory rate by tapping the touch screen every time the child inhales. In addition to calculating the rate of inhalations during a given time, the app also provides an animation of a breathing baby, allowing for a direct comparison with the breathing patient.
"We are leveraging the phone's capabilities of computing, touchscreen, and vibrational feedback to measure respiratory rate faster and with more confidence," said Karlen.

Researchers collected data from 30 subjects who used the app while watching videos of children breathing at different rates. Using these findings, they developed an algorithm that enabled the app to produce accurate measurements in the least amount of time.
The next stage of the study is to further improve the diagnosis of pneumonia in low-resource settings by combining this app with the Phone Oximeter, researchers said.
The Phone Oximeter provides non-invasive measurements of blood oxygen levels using a light sensor and a mobile phone. The research was published in the journal PLOS One.

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