Navigation Links
Web will work wonders for the faint hearted
Date:2/14/2008

A new device could put the beat back into weak hearts - and free patients from a lifetime of anti-rejection drugs.

Current implanted heart assist devices function by sucking blood from the ventricles and then expelling it into downstream vessels. Whilst these have been successful in prolonging the lives of heart patients, they come into contact with the blood stream and hence require life-long drug therapy to suppress the immune system and prevent blood clotting. In addition, many of these devices use high speed turbines to produce the pumping force, and this has been proven to cause damage to cells within the blood increasing the chance of clots forming.

The ingenious device being developed by engineers at the University of Leeds provides a less invasive alternative. The team has developed a specially-woven web made from biocompatible material which will not be rejected by the body.

The webbing wraps around the heart and therefore does not come into contact with the blood stream. Inbuilt sensors recognise when the heart wants to beat and trigger a series of miniature motors which cause the web to contract increasing the internal pressure and assisting the heart to pump the blood around the body.

The team consists of Drs Peter Walker (who devised the original concept) and Martin Levesley from the Universitys School of Mechanical Engineering, cardiac consultants Kevin Watterson and Osama Jaber from Leeds General Infirmary and engineering PhD student David Keeling. The research has been funded by Leeds-based medical charity Heart Research UK.

Its a really simple concept that works in the same way as when you squeeze a plastic bottle, forcing the liquid inside to rise, says PhD student David Keeling who has built a special rig to test the device.

The device is currently at prototype stage with team using a computer simulated model of the human blood flow circuit coupled to Davids mechanical rig. The rig replicates the motion of the heart within the simulation under different conditions, and allows the team to test their web device. The group is currently testing their latest prototype, aiming to refine design and assist strategies. Says David: Weve been looking at finding the optimum timing to trigger and also length of the compressive squeeze.

Once the mechanics have been perfected, the team intends to simulate the effects of different heart diseases to gauge the potential success of the device.

Potential uses for the device are huge. As well as offering support to people suffering from heart and valve problems, the device could also be a bridging aid to patients as they wait for transplants, providing them with a better quality of life. Says David: Recent research has found that with some heart diseases, supporting the heart for a short period with an assistive device reduces the work-load on the heart and allows it to rest and recover. Our device also allows for a controlled relaxation of the heart muscle after contraction, which means that its being supported throughout the whole heartbeat process. Its the same as when you pull a muscle in any other part of your body, rest can often be the best therapy.


'/>"/>

Contact: Jo Kelly
jokelly@campuspr.co.uk
44-113-258-9880
University of Leeds
Source:Eurekalert  

Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Web will work wonders for the faint hearted
(Date:3/24/2017)... , ... March 24, 2017 , ... ... the military at the same time by providing Prehospital Trauma Life Support (PHTLS) ... is the world’s premier prehospital trauma education developed in cooperation with the American ...
(Date:3/24/2017)... ... ... According to a new study by NCPA Senior Fellow John R. Graham, "the ... has directed the CBO to follow. The CBO itself previously recognized Obamacare would kill ... a reduction in employer-based coverage due to the GOP reform, which is not plausible. ...
(Date:3/24/2017)... ... March 24, 2017 , ... In just two days, Aqua ... micro-veggies garden on Kickstarter . Surpassing the $100,000 milestone so quickly,10-times the ... consumers (and counting) already backing the campaign. , “We are very grateful ...
(Date:3/24/2017)... , ... March 24, 2017 , ... Viewers who like ... of critical historical facts, cultural practices, goods, services, and societal issues tend to appreciate ... look into the popular practice of utilizing running events for causes around the world. ...
(Date:3/24/2017)... ... 2017 , ... “End Time GPS”: a dauntless and enlightened study of ... GPS” is the creation of published author, Wesley Gerboth, a World War II veteran, ... space-vehicle projects. Now, at age ninety-one, he shares the Wisdom God bestowed upon him ...
Breaking Medicine News(10 mins):
(Date:3/24/2017)...  Eli Lilly and Company (NYSE: ... million in its U.S. operations in 2017. The ... including research laboratories, manufacturing sites, and general and ... demand for Lilly products, as well as its ... cancer, pain, diabetes and other unmet medical needs.  ...
(Date:3/24/2017)... The Board of Directors of Nordic ... 2016 including the complete 2016 Annual Accounts with notes. The ... Nanovector,s website in the section Investor Relations/Reports and presentations/Annual Reports. ... For ... Chief Financial Officer Cell: +47-91-51-95-76 Email: ir@nordicnanovector.com ...
(Date:3/23/2017)... HICKORY, N.C. , March 23, 2017  Transportation ... accolades as an end-to-end supply chain management firm with ... of Consumer Product Solutions Rick Zaffarano was ... Star of the Supply Chain by the only publication ... the global food supply chain. "Rick has ...
Breaking Medicine Technology: