Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Star-shaped metal clip takes novel approach to closing artery punctures

12.09.2005


Bleeding stops in just 37 seconds



A metal clip that closes an arterial puncture by drawing the wound edges together like a drawstring stitch is proving an easy and effective way to speed patient recovery after coronary interventions, according to a study in the just-published October 2005 issue of Catheterization and Cardiovascular Interventions: Journal of the Society for Cardiovascular Angiography and Interventions.

The study--the first published report in humans--tested the safety and effectiveness of the StarClose Extravascular Closure System (Abbott Vascular Devices, Redwood City, Calif.). This star-shaped nitinol ring helps seal the entry hole left behind after a coronary catheter snakes its way from an artery in the groin to the arteries of the heart. Only 4 mm across--about half the diameter of a ballpoint pen--the StarClose is positioned against the outside arterial wall at the puncture site and then released.


"This device has little pins that grab the arterial tissue from the outside, then fold inward, causing it to pucker a little and seal the puncture. It’s a novel and exciting approach," said Dr. Peter N. Ruygrok, cardiology director at Auckland City Hospital in Auckland, New Zealand.

Dr. Ruygrok led a study of 25 patients who were treated with the StarClose device after having coronary stenting. All patients were taking the recommended regimen of blood-thinning drugs to prevent clots from forming during the procedure.

Use of the StarClose device was successful in 23 of 25 patients. On average, it took only 36 seconds to insert the clip and close the arterial puncture. Despite the aggressive blood-thinning regimen, it took an average of only 37 seconds for bleeding to completely stop. There were no serious complications.

Without the StarClose or another type of arterial closure device, the patient must rest quietly for approximately four hours after a coronary intervention before it is safe for a nurse to remove the sheath that guides treatment catheters into and out of the artery. Manual pressure must then be applied above the puncture site for 20 minutes or more, until a blood clot seals the wound. The patient must lie flat for another four to six hours to keep from disturbing the fresh clot.

A key advantage of the StarClose device is that, in an era of overworked nursing staff and scarce hospital beds, the interventional cardiologist can remove the guiding sheath immediately after the coronary procedure, potentially speeding both transfer of the patient to a regular hospital room and discharge from the hospital.

"We can move patients out of the cardiac care area more quickly," Dr. Ruygrok said. "Four hours of lying quietly waiting for the sheath to be pulled is a lot of down time for the patient and for the hospital bed."

Kathy Boyd David | EurekAlert!
Further information:
http://www.scai.org

More articles from Health and Medicine:

nachricht One gene closer to regenerative therapy for muscular disorders
01.06.2017 | Cincinnati Children's Hospital Medical Center

nachricht The gut microbiota plays a key role in treatment with classic diabetes medication
01.06.2017 | University of Gothenburg

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Can we see monkeys from space? Emerging technologies to map biodiversity

An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.

Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...

Im Focus: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

Quantum thermometer or optical refrigerator?

23.06.2017 | Physics and Astronomy

A 100-year-old physics problem has been solved at EPFL

23.06.2017 | Physics and Astronomy

Equipping form with function

23.06.2017 | Information Technology

VideoLinks
B2B-VideoLinks
More VideoLinks >>>