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:2/2/2016)... Feb. 2, 2016 This BCC Research ... market by reviewing the recent advances in high ... drive the field forward. Includes forecast through 2019. ... the challenges and opportunities that exist in the ... solution developers, as well as IT and bioinformatics ...
(Date:2/2/2016)... NEW YORK , Feb. 2, 2016 Technology ... service presents an analysis of the digital and computed ... Malaysia , and Indonesia ... current trends and market size, as well as regional ... by country and discusses market penetration and market attractiveness, ...
(Date:2/2/2016)... , Feb. 2, 2016  Based on its ... & Sullivan recognizes US-based Intelligent Retinal Imaging Systems ... Sullivan Award for New Product Innovation. IRIS, a ... North America , is poised to ... growing diabetic retinopathy market. The IRIS technology presents ...
Breaking Biology News(10 mins):
(Date:2/10/2016)... , Feb. 10, 2016  Allergan plc (NYSE: ... announced that Brent Saunders , Allergan,s CEO and ... a fireside chat session at the RBC Capital Markets ... p.m. ET at The New York Palace Hotel in ... will be webcast live and can be accessed on ...
(Date:2/10/2016)... ... 10, 2016 , ... LATHAM, NEW YORK... Marktech Optoelectronics will feature ... in San Francisco’s Moscone Center from February 16-18, 2016, and at the healthcare-focused ... latest InGaAs PIN diode standard packages feature a TO-46 metal can with active areas ...
(Date:2/10/2016)... , ... February 10, 2016 , ... ... medicine, has announced a new agreement with Singapore-based Global Stem Cells Network (GSCN) ... the Philippines, Thailand and Singapore in the latest adipose and bone marrow therapies. ...
(Date:2/9/2016)... 9, 2016  Regenicin, Inc. (OTC Bulletin Board: ... the development and commercialization of regenerative cell therapies ... organs, recently reported the Company,s operating results for ... 2016. Lonza America , Inc. (the ... year in the process of consummating an agreement ...
Breaking Biology Technology: