Navigation Links
Heart-powered pacemaker could one day eliminate battery-replacement surgery
Date:3/2/2012

ANN ARBOR, Mich.A new power scheme for cardiac pacemakers turns to an unlikely source: vibrations from heartbeats themselves.

Engineering researchers at the University of Michigan designed a device that harvests energy from the reverberation of heartbeats through the chest and converts it to electricity to run a pacemaker or an implanted defibrillator. These mini-medical machines send electrical signals to the heart to keep it beating in a healthy rhythm. By taking the place of the batteries that power them today, the new energy harvester could save patients from repeated surgeries. That's the only way today to replace the batteries, which last five to 10 years.

"The idea is to use ambient vibrations that are typically wasted and convert them to electrical energy," said Amin Karami, a research fellow in the U-M Department of Aerospace Engineering. "If you put your hand on top of your heart, you can feel these vibrations all over your torso."

The researchers haven't built a prototype yet, but they've made detailed blueprints and run simulations demonstrating that the concept would work. Here's how: A hundredth-of-an-inch thin slice of a special "piezoelectric" ceramic material would essentially catch heartbeat vibrations and briefly expand in response. Piezoelectric materials' claim to fame is that they can convert mechanical stress (which causes them to expand) into an electric voltage.

Karami and his colleague Daniel Inman, chair of Aerospace Engineering at U-M, have precisely engineered the ceramic layer to a shape that can harvest vibrations across a broad range of frequencies. They also incorporated magnets, whose additional force field can drastically boost the electric signal that results from the vibrations.

The new device could generate 10 microwatts of power, which is about eight times the amount a pacemaker needs to operate, Karami said. It always generates more energy than the pacemaker requires, and it performs at heart rates from 7 to 700 beats per minute. That's well below and above the normal range.

Karami and Inman originally designed the harvester for light unmanned airplanes, where it could generate power from wing vibrations.


'/>"/>
Contact: Nicole Casal Moore
ncmoore@umich.edu
734-647-7087
University of Michigan
Source:Eurekalert

Related biology news :

1. Towards a natural pacemaker
2. Energy-harvesting rubber sheets could power pacemakers, mobile phones
3. A pacemaker for your brain
4. New technology may prolong the life of implanted devices, from pacemakers to chemotherapy ports
5. Sea squirt pacemaker gives new insight into evolution of the human heart
6. Vitiligo skin disorder could yield clues in fight against melanoma
7. Saliva proteins could help detection of oral cancer
8. Research about plant viruses could lead to new ways to improve crop yields
9. Nanodiamond drug device could transform cancer treatment
10. UNC study on properties of carbon nanotubes, water could have wide-ranging implications
11. So-called sandfish could help materials handling and process technology specialists
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/24/2017)... , April 24, 2017 Janice ... partner with  Identity Strategy Partners, LLP (IdSP) , ... or without President Trump,s March 6, 2017 ... Entry , refugee vetting can be instilled with greater ... (Right now, all refugee applications are suspended by ...
(Date:4/13/2017)... India , April 13, 2017 According to ... Proofing, Identity Authentication, Identity Analytics, Identity Administration, and Authorization), Service, Authentication Type, ... MarketsandMarkets™, the IAM Market is expected to grow from USD 14.30 Billion ... Growth Rate (CAGR) of 17.3%. ... MarketsandMarkets ...
(Date:4/6/2017)... 6, 2017 Forecasts by Product ... Readers, by End-Use (Transportation & Logistics, Government & Public ... & Fossil Generation Facility, Nuclear Power), Industrial, Retail, Business ... Are you looking for a definitive report on ... ...
Breaking Biology News(10 mins):
(Date:6/23/2017)... ... 23, 2017 , ... The Academy of Model Aeronautics (AMA), ... Association (UAA), the unifying voice for collegiate aviation education, are launching a joint ... and success through a STEM-based education platform. , Much like the program currently ...
(Date:6/22/2017)... Colorado (PRWEB) , ... June 21, 2017 , ... ... RTP regional office in North Carolina, and engages Timothy Reinhardt to manage the ... of quality leadership at Pfizer Inc, with his most recent role as the ...
(Date:6/22/2017)... , ... June 22, 2017 , ... ... over the allergy specialists DST Diagnostische Systeme & Technologien GmbH, thereby expanding its ... someone who suffers from hay fever, urticaria, asthma, atopic eczema or a food ...
(Date:6/22/2017)... ... June 22, 2017 , ... For the months of ... a Spotlight series on “Cell Therapy Regulation” for its regenerative medicine ... on the unique regulatory challenges of stem cell medical research. , Stem cell ...
Breaking Biology Technology: