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!
Artificial intelligence may help diagnose tuberculosis in remote areas
25.04.2017 | Radiological Society of North America
Pharmacoscpy: Next-Generation Microscopy
25.04.2017 | CeMM Forschungszentrum für Molekulare Medizin der Österreichischen Akademie der Wissenschaften
More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.
Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...
Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.
"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...
The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...
Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.
Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
20.04.2017 | Event News
18.04.2017 | Event News
03.04.2017 | Event News
25.04.2017 | Physics and Astronomy
25.04.2017 | Materials Sciences
25.04.2017 | Life Sciences