Nav: Home

Device helps ICU patients by filtering out noise from medical alarms

June 21, 2017

A team of investigators at Vanderbilt University Medical Center wants to improve patient outcomes in Intensive Care Unit (ICU) settings by silencing audible medical alarms in hospital rooms.

Auditory medical alarms have created hazards for patient recovery, said Joseph J. Schlesinger, M.D., assistant professor of Anesthesia, Division of Critical Care Medicine at Vanderbilt. His team has created a device that removes the alarm sounds while preserving the patient's ability to hear human and environmental stimuli, notably speech.

The findings, "Frequency-Selective Silencing Device for Digital Filtering of Audible Medical Alarm Sounds to Enhance ICU Patient Recovery," were presented at the International Community for Auditory Display (ICAD) at Penn State this week. The paper highlights how loud noises produced by clinical alarms contribute to psychological problems like delirium and PTSD and provides innovative solutions to enhance the patient experience.

"The shrill and quantity of audible medical alarms are responsible for many negative consequences for patients," said Schlesinger. "The noise of the alarm combined with its frequency often disturbs patients' sleep patterns, which can be very disorienting.

"We wanted to create a way that clinicians would still be alerted to necessary patient alarms, while providing a better environment for the patient's healing process," he said. "The question became - how do we filter out the alarms from the patient experience without harming the patient's ability to hear and comprehend speech as well as be in tune to other environmental sounds?"

Schlesinger collaborated with students from Vanderbilt University Department of Biomedical Engineering to develop a device worn by the patient that eliminates alarm sounds from the patient perspective by digitally subtracting sound waves while preserving and improving speech comprehension.

The team tested the in-ear device in a simulated ICU environment. The results showed clinical and statistical improvement in alarm filtering.

Schlesinger hopes his team's findings will spark collaborations across the country to further develop devices that are medical grade, affordable and reusable.

"This will need further study in large patient populations to look at patient outcomes, benefits and safety," he said. "I anticipate we will have some interest from multiple sites to investigate use in patients.

"Future directions also include a device for clinicians that would transmit the alarm signals directly to the nurse and physician caring for a particular patient."

Schlesinger holds adjunct faculty appointments in Vanderbilt's School of Nursing, Department of Hearing and Speech Sciences, and the Division of Biomedical Engineering within the School of Engineering.

In addition to his faculty appointment at Vanderbilt, he is a research member of the Centre for Interdisciplinary Research in Music Media and Technology, and an Adjunct Professor of Electrical and Computer Engineering at McGill University in Montreal, Canada.
-end-


Vanderbilt University Medical Center

Related Engineering Articles:

Engineering a new cancer detection tool
E. coli may have potentially harmful effects but scientists in Australia have discovered this bacterium produces a toxin which binds to an unusual sugar that is part of carbohydrate structures present on cells not usually produced by healthy cells.
Engineering heart valves for the many
The Wyss Institute for Biologically Inspired Engineering and the University of Zurich announced today a cross-institutional team effort to generate a functional heart valve replacement with the capacity for repair, regeneration, and growth.
Geosciences-inspired engineering
The Mackenzie Dike Swarm and the roughly 120 other known giant dike swarms located across the planet may also provide useful information about efficient extraction of oil and natural gas in today's modern world.
Engineering success
Academically strong, low-income would-be engineers get the boost they need to complete their undergraduate degrees.
HKU Engineering Professor Ron Hui named a Fellow by the UK Royal Academy of Engineering
Professor Ron Hui, Chair Professor of Power Electronics and Philip Wong Wilson Wong Professor of Electrical Engineering at the University of Hong Kong, has been named a Fellow by the Royal Academy of Engineering, UK, one of the most prestigious national academies.
Engineering a better biofuel
The often-maligned E. coli bacteria has powerhouse potential: in the lab, it has the ability to crank out fuels, pharmaceuticals and other useful products at a rapid rate.
Pascali honored for contributions to engineering education
Raresh Pascali, instructional associate professor in the Mechanical Engineering Technology Program at the University of Houston, has been named the 2016 recipient of the Ross Kastor Educator Award.
Scaling up tissue engineering
A team at the Wyss Institute for Biologically Inspired Engineering at Harvard University and the Harvard John A.
Engineering material magic
University of Utah engineers have discovered a new kind of 2-D semiconducting material for electronics that opens the door for much speedier computers and smartphones that also consume a lot less power.
Engineering academic elected a Fellow of the IEEE
A University of Bristol academic has been elected a Fellow of the world's largest and most prestigious professional association for the advancement of technology.

Related Engineering Reading:

Best Science Podcasts 2019

We have hand picked the best science podcasts for 2019. Sit back and enjoy new science podcasts updated daily from your favorite science news services and scientists.
Now Playing: TED Radio Hour

Anthropomorphic
Do animals grieve? Do they have language or consciousness? For a long time, scientists resisted the urge to look for human qualities in animals. This hour, TED speakers explore how that is changing. Guests include biological anthropologist Barbara King, dolphin researcher Denise Herzing, primatologist Frans de Waal, and ecologist Carl Safina.
Now Playing: Science for the People

#SB2 2019 Science Birthday Minisode: Mary Golda Ross
Our second annual Science Birthday is here, and this year we celebrate the wonderful Mary Golda Ross, born 9 August 1908. She died in 2008 at age 99, but left a lasting mark on the science of rocketry and space exploration as an early woman in engineering, and one of the first Native Americans in engineering. Join Rachelle and Bethany for this very special birthday minisode celebrating Mary and her achievements. Thanks to our Patreons who make this show possible! Read more about Mary G. Ross: Interview with Mary Ross on Lash Publications International, by Laurel Sheppard Meet Mary Golda...