Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


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


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:

More articles from Health and Medicine:

nachricht Resolving the mystery of preeclampsia
21.10.2016 | Universitätsklinikum Magdeburg

nachricht New potential cancer treatment using microwaves to target deep tumors
12.10.2016 | University of Texas at Arlington

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: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

Im Focus: New Products - Highlights of COMPAMED 2016

COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.

In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...

Im Focus: Ultra-thin ferroelectric material for next-generation electronics

'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.

Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

Resolving the mystery of preeclampsia

21.10.2016 | Health and Medicine

Stanford researchers create new special-purpose computer that may someday save us billions

21.10.2016 | Information Technology

From ancient fossils to future cars

21.10.2016 | Materials Sciences

More VideoLinks >>>