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Development of a New Method for Discriminating Embolus from Air Bubble by Active Ultrasound Doppler Method. 1 (Experiments of Ultrasound Irradiation Perpendicular to a Tube Axis in Flows of Water and Modeled Blood)
USD TCD cerebral embolism characteristic acoustic impedance acoustic radiation force
2009/8/24
An “active” ultrasound Doppler method was newly developed in order to directly and easily discriminate emboli from micro bubbles flowing in blood vessel. The principle of this method is based on measu...
Bubble growth and mechanical properties of tissue in decompression
decompression model bubble animal dog human
2009/7/20
A survey of decompression literature leads to the conclusion that when tissue is subjected to gaseous supersaturation, pre-existing gas micronuclei grow into the gas bubbles which are routinely observ...
Decompression-induced bubble formation in salmonids:comparison to gas bubble disease
decompression bubble salmonids
2009/7/20
The relationship of gas bubble disease (GBD) in fish to decompression-induced bubble formation was investigated with salmonids. Acute bioassays were used to determine equilibration times for critical ...
A method for measurement of the bubble formation threshold in biological liquids
measurement bubble biological liquids pressure-time course
2009/7/20
Liquid under pressure is saturated with a given gas, such as argon, nitrogen, or air, by circulation through a column of gas exchangers. A sample of the gas-saturated liquid is isolated in a test cham...
Prlonged bubble production by transient isobaric counter-equilibration of helium against nitrogen
decompression
2009/7/17
The production of systemic gas bubbles by isobaric counter-equilibration of helium against 5 atmospheres saturated nitrox (0.3 ATA O2 in both mixes) in awake goats was demonstrated. Sixteen animal exp...
Bubble production in agarose gels subjected to different decompression schedules
agarose gel bubble decompression
2009/7/17
The relative effectiveness of seven different (military, commercial, and experimental) decompression schedules in reducing bubble formation within aqueous gels has been evaluated quantitatively under ...
Venous gas bubble production following cold stress during a no-decompression dive
human thermal bubble exercise
2009/7/16
The effect of cold stress on venous gas bubble production was studied using Doppler ultrasonic monitoring. Ten subjects participated in four exposure regimes carried out at 78 fsw on an underwater pla...
Ruthenium red staining of blood-bubble interface in acute decompression sickness in rat
decompression sickness blood bubble interface animal rat
2009/7/16
The ultrastructure of the blood-bubble interface has been studied in rats decompressed experimentally. Subsequent to staining with ruthenium red there was detected by electron microscopy a continuous ...
Application of bubble formation model to decompression sickness in fingerling salmon
decompression sickness human cavitation model gas nuclei fingerling salmon animal
2009/7/16
Recently a new cavitation model has been proposed in which bubble formation in aqueous media in initiated by spherical gas nuclei stabilized by surface-active membranes of varying gas permeability. In...
Evaluation of different decompression schedules by an agarose gel bubble technique
human agar gel decompression schedule bubble evaluation
2009/7/16
It is well known that diving decompression schedules vary according to country and that Navy schedules are often different from civilian ones. Furthermore, it is difficult to compare them effectively,...
Velocity of ultrasound as an indicator of bubble content
human Velocity bubble content gas
2009/7/15
The principle has been evaluated of detecting stationary tissue gas bubbles simply by measuring the velocity of ultrasound. Agar gel has been used to simulate tissue. At wavelengths appreciably larger...
Doppler bubble detection and decompression sickness: a prospective clinical trial
decompression pulmonary human
2009/7/15
Decompression sickness in human beings exposed to high ambient pressure is thought to follow from gas bubble formation and growth in the body during return to low pressure. Detection of Doppler-shifte...
In vivo microbubble detection in decompression sickness using a second harmonic resonant bubble detector
decompression bubble detection dog animal
2009/7/14
A resonant bubble detection method based on a second harmonic technique has been used to monitor the femoral vascular system of dogs subjected to rapid decompression. For this study, the detector cons...
Modeling the observations of in vivo bubble formation with hydrophobic crevices
crevice bubble animal shrimp (Crustacea)
2009/7/14
In vivo hydrophobic crevices from which bubbles emerge upon decompression are hypothesized to account for experimental observations of bubble formation in decompressed shrimp. The conical crevice mode...
Bubble formation properties of hydrophobic particles in water and cells of Tetrahymena
Bubble hydrophobic particles Tetrahymena
2009/7/9
It is generally assumed that hydrophobic surfaces play a role in bubble formation in vivo, but no tests of this assumption seem to exist. Model systems for both in vitro and in vivo study of the bubbl...