A significant number of publications are devoted to results of investigations aimed at the development of methods of laser ablation for varicose veins. This is due to the fact that this method is an effective and minimally invasive technique for the treatment of varicose.
However, this kind of therapy is associated with significant collateral damage because of the high output power of the laser. Therefore, it is an important question in vein surgery to optimize the laser characteristics for ablation.
To realize a process of endovenous laser ablation (EVLA), it is necessary to expose the laser radiation upon a region of the vessel so that it receives sufficient energy to cause thermal damage.
On one hand, the value of this energy should provide coagulation of vein, and on the other, it should be optimized so that the structure of the surrounding healthy tissues has received a minimum degree of damage.
This original study conducted by researchers from Ogarev Mordovia State University and Kazan Federal University presents the results of experiments on endovenous laser ablation of varicose veins in vitro using laser radiation of a solid-state laser and identifying the role a carbonized layer of blood in these experiments.
An experimental series with saline solution and red blood cell (RBC) suspension in the venous lumen was performed to identify the impact of a heated carbonized layer precipitated on the fiber end face versus the efficiency of EVLA. Results of these experiments confirmed that the presence of a heated carbonized layer on the fiber end face increases the efficiency of EVLA.
Further experiments are planned for process optimization. For instance, it is planned to use radial emitting fibers since this technique can minimize a possibility of vein perforations. Also, modification of the experimental device without placement of vein into a glass tube will allow to approach experimental conditions to real.
Contract grant sponsors the Ministry of Education and Science of the Russian Federation (the project part of the State Assignment in the sphere of scientific activities no 3.384.2014/? and State Assignment no. 0708 0210059 611); the subsidy of the Russian Government (agreement no. 02.A03.21.0002) to support the Program of Competitive Growth of Kazan Federal University among World's Leading Academic Centers.
Evgeniya Litvinova | EurekAlert!
Faster detection of atrial fibrillation thanks to smartwatch
18.03.2019 | Universität Greifswald
A peek into lymph nodes
15.03.2019 | Tohoku University
The Potsdam Echelle Polarimetric and Spectroscopic Instrument (PEPSI) at the Large Binocular Telescope (LBT) in Arizona released its first image of the surface magnetic field of another star. In a paper in the European journal Astronomy & Astrophysics, the PEPSI team presents a Zeeman- Doppler-Image of the surface of the magnetically active star II Pegasi.
A special technique allows astronomers to resolve the surfaces of faraway stars. Those are otherwise only seen as point sources, even in the largest telescopes...
Researchers at Chalmers University of Technology and the University of Gothenburg, Sweden, have proposed a way to create a completely new source of radiation. Ultra-intense light pulses consist of the motion of a single wave and can be described as a tsunami of light. The strong wave can be used to study interactions between matter and light in a unique way. Their research is now published in the scientific journal Physical Review Letters.
"This source of radiation lets us look at reality through a new angle - it is like twisting a mirror and discovering something completely different," says...
New research group at the University of Jena combines theory and experiment to demonstrate for the first time certain physical processes in a quantum vacuum
For most people, a vacuum is an empty space. Quantum physics, on the other hand, assumes that even in this lowest-energy state, particles and antiparticles...
Physicists in the EPic Lab at University of Sussex make crucial development in global race to develop a portable atomic clock
Scientists in the Emergent Photonics Lab (EPic Lab) at the University of Sussex have made a breakthrough to a crucial element of an atomic clock - devices...
Every year earthquakes worldwide claim hundreds or even thousands of lives. Forewarning allows people to head for safety and a matter of seconds could spell...
11.03.2019 | Event News
01.03.2019 | Event News
28.02.2019 | Event News
19.03.2019 | Physics and Astronomy
19.03.2019 | Life Sciences
19.03.2019 | Physics and Astronomy