On the safety of ultrasound exposure

Choonpa Igaku ◽  
2008 ◽  
Vol 35 (6) ◽  
pp. 623-629 ◽  
Author(s):  
Nobuki KUDO ◽  
Katsuyuki YAMAMOTO
Keyword(s):  
Ultrasound Exposure

Effekt of blood flow shutdown on the vein damage when exposed to HIFU

2017 ◽  
pp. 46-50
Author(s):  
Н.Н. Петрищев ◽  
Д.Ю. Семенов ◽  
А.Ю. Цибин ◽  
Г.Ю. Юкина ◽  
А.Е. Беркович ◽  
...  
Keyword(s):  
Blood Flow ◽  
Structural Changes ◽  
Focused Ultrasound ◽  
Vena Cava ◽  
Posterior Wall ◽  
High Intensity Focused Ultrasound ◽  
Vein Wall ◽  
Ultrasound Exposure ◽  
Isolated Segment ◽  
The Impact

The purpose. In the study we investigated the impact of the partial blood flow shutdown on structural changes in the rabbit vena cava posterior wall after exposure to high-intensity focused ultrasound (HIFU). Methods. Ultrasound Exposure: frequency of 1.65 MHz, the ultrasound intensity in the focus of 13.6 kW/cm, the area of the focal spot 1 mm, continuous ultrasound, exposure for 3 seconds. Results. Immediately after HIFU exposure all layers of the vein wall showed characteristic signs of thermal damage. A week after exposure structural changes in the intima, media and adventitia was minimal in the part of vessel with preserved blood flow, and after 4 weeks the changes were not revealed. A week after HIFU exposure partial endothelium destruction, destruction of myocytes, disorganization and consolidation of collagen fibers of the adventitia were observed in an isolated segment of the vessel, and in 4 weeks endothelium restored and signs of damage in media and adventitia persisted, but were less obvious than in a week after exposure. Conclusion. The shutdown of blood flow after exposure to HIFU promotes persistent changes in the vein wall. Vein compression appears to be necessary for the obliteration of the vessel, when using HIFU-technology.

Researches on the Synthesis and Biological Activity of 1,2,4-tiadizoles-3,5-disubstituted using Ditiazolium Salts as Precursors

2008 ◽  
Vol 59 (1) ◽  
pp. 101-105
Author(s):  
Irina Zarafu ◽  
Lucia Veronica Ivan ◽  
Iuliana Harasim
Keyword(s):  
Biological Activity ◽  
Comparative Study ◽  
Anticancer Activity ◽  
Reaction Process ◽  
Physical Analysis ◽  
Ultrasound Exposure ◽  
Medium Activity ◽  
Antibacterial And Anticancer Activity

3,5-disubstituted-1,2,4-tiadiazoles with substituted-styril and heterocycle-vinyl were obtained by extending the method which implies the use of 3,5-disubstituted-1,2,4-ditiazolium salts as precursors [1-4]. A comparative study of the reaction process in the case of perchlorates, diacide phosphates, tribromides and 3,5-distyrile-dithiazolium triiodides, taken as etalon, was perfomed. Good yields were obtained when using perchlorates, phosphates and triiodides. The reaction was made by heating the reaction mixture and by ultrasound exposure. The structure of the compounds was confirmed by chemical and physical analysis and the data obtained were identical to those of 3,5-disubstituted-1,2,4-tiadiazoles obtained by another methods [5,6]. The biological (antibacterial and anticancer) activity of the synthesized compounds was tested and the results indicated a medium activity.

Experimental analysis of behavior in nanobubbles using echograms under ultrasound exposure

2016 ◽  
Vol 55 (7S1) ◽  
pp. 07KF06 ◽  
Author(s):  
Hikaru Wada ◽  
Jun Koido ◽  
Shinya Miyazawa ◽  
Takashi Mochizuki ◽  
Kohji Masuda ◽  
...  
Keyword(s):  
Experimental Analysis ◽  
Experimental Analysis Of Behavior ◽  
Ultrasound Exposure

Development and estimation of brain tumor cells culture flask with acoustic window film for ultrasound exposure

2014 ◽  
Vol 53 (7S) ◽  
pp. 07KF12 ◽  
Author(s):  
Sakino Iwasiro ◽  
Akiko Watanabe ◽  
Yoshifumi Onozuka ◽  
Masatsune Minai ◽  
Hiroyuki Nishimura ◽  
...  
Keyword(s):  
Brain Tumor ◽  
Tumor Cells ◽  
Ultrasound Exposure ◽  
Acoustic Window ◽  
Culture Flask ◽  
Brain Tumor Cells ◽  
Window Film

scholarly journals Aetiological factors in left-handedness

2005 ◽  
Vol 133 (11-12) ◽  
pp. 532-534 ◽  
Author(s):  
Sanja Milenkovic ◽  
Goran Belojevic ◽  
Radojka Kocijancic
Keyword(s):  
Genetic Factors ◽  
The Body ◽  
Intrauterine Environment ◽  
Foetal Development ◽  
Ultrasound Exposure ◽  
The Past ◽  
Left Handedness ◽  
Left Handed ◽  
Efferent Pathways ◽  
Genetically Determined

Lateralisation associates the extremities and senses of one side of the body, which are connected by afferent and efferent pathways, with the primary motor and sensory areas of the hemisphere on the opposite side. Dominant laterality denotes the appearance of a dominant extremity or sense in the performance of complex psychomotor activities. Laterality is manifested both as right-handedness or left-handedness, which are functionally equivalent and symmetrical in the performance of activities. Right-handedness is significantly more common than left-handedness. Genetic theory is most widely accepted in explaining the onset of lateralisation. According to this theory, the models of brain organisation asymmetry (anatomical, functional, and biochemical) are strongly, genetically determined. However, the inability to clearly demonstrate the association between genetic factors and left-handedness has led researchers to investigate the effects of the environment on left-handedness. Of particular interest are the intrauterine environment and the factors influencing foetal development, of which hormones and ultrasound exposure are the most significant. It has been estimated that an extra five cases of nonright-handed lateralisation can be expected in every 100 males who were exposed to ultrasound in utero compared to those who were not. Socio-cultural pressure on left-handed individuals was much more severe in the past, which is confirmed by scientific findings that left-handedness is present in 13% of individuals in their twenties, while in less than 1% of individuals in their eighties.

scholarly journals Basic study on dispersion and surface modification of diamond powders by ultrasound exposure

2003 ◽  
Vol 24 (6) ◽  
pp. 413-414 ◽  
Author(s):  
Takeyoshi Uchida ◽  
Akiyo Tsuchiya ◽  
Toshio Sato ◽  
Norimichi Kawashima ◽  
Shinichi Takeuchi ◽  
...  
Keyword(s):  
Surface Modification ◽  
Basic Study ◽  
Ultrasound Exposure ◽  
Diamond Powders
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