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Release of dopamine from striatal synaptosomes:high pressure effects
animal Guinea pig neurological high pressure neurologic syndrome
2009/7/10
Adverse neurological manifestations of exposure to high hydrostatic pressure include tremor and convulsions, suggesting an alteration in synaptic transmission, particularly with inhibitory pathways. B...
Effects of high pressure and vanadium on cell growth
vanadium cell growth animal Chinese hamster
2009/7/10
We have investigated the effects on cultured cells of high pressure separately and combined with vanadate. Growth of Chinese hamster ovary cells was reduced at pressure above 75 bar; the reduction was...
Effects of hydrostatic pressure,H2,N2,and He,on beating frequency of rat atria
hydrogen nitrogen animal rat cardiovascular helium
2009/7/9
Hydrostatic compression to 15 MPa caused a drop in spontaneous beating frequency (BF) of isolated rat atria kept in tris solution at 37 degrees C by 30.6 +/- 7.2%. Introduction of superfusing solution...
Changes in insulation of wetsuits during repetitive exposure to pressure
wet suit thermal protection insulation repetitive dive
2009/7/9
This investigation was intended to a) establish a relationship between pressure and thickness (and hence insulation) of wetsuits during acute changes in pressure from 0.5 to 5 atmospheres absolute (AT...
Interaction of ethanol and the high pressure nervous syndrome in rats
helium heliox chamber high pressure nervous syndrome animal rat ethanol
2009/7/9
The aim of this study was to determine whether administration of ethanol protects rats against the preconvulsive symptoms of high pressure nervous syndrome (HPNS). Male Sprague-Dawley rats were given ...
Effects of breathing-gas pressure on pulmonary function and work capacity during immersion
exercise pulmonary narcosis hyperbaric air immersion work of breathing
2009/7/9
Upright immersion induces respiratory mechanical changes that may impair pulmonary function during hyperbaric exercise. To evaluate this, 10 divers performed an incremental cycling protocol while imme...
Effect of inspiratory-phase negative pressure breathing on urine flow in man
negative pressure urine
2009/7/8
We investigated the effect of negative pressure breathing during the inspiratory phase only (intermittent NPB) in 9 healthy male subjects who were in a sitting position and had no food or fluid intake...
A system for saturating in vitro preparations with high pressure O2,He,H2,and mixtures
saturation hydrogen hyperbaric chamber method
2009/7/8
Saturation of a liquid with gas before perfusing a tissue or cellular preparation under pressure can be achieved by bubbling the gas through the liquid. A container for this purpose that is housed in ...
Effect of pressure on the release of endogenous dopamine from rat striatum and the role of sodium-calcium exchange
model animal rat High Pressure Neurological Syndrome
2009/7/8
Exposure to environmental pressures in excess of 20 atm abs can precipitate a hyperexcitability state known as high pressure neurologic syndrome (HPNS). Little is known about the underlying neurochemi...
High pressure effects on reflexes in isolated spinal cords of newborn rats
saturation spinal cord animal rat
2009/7/8
High pressure induces hyperexcitability and convulsions in both intact and decerebrated animals. However, pressure suppresses synaptic transmission in isolated invertebrate preparations. We examined t...
Respiratory effects of warm and dry air at increased ambient pressure
dry air pressure Respiratory
2009/7/8
We have measured in 7 divers forced vital capacity (FVC), forced expired volume in 1 s (FEV1), and forced midexpiratory flow rate (FEF25-75%) before and after exposure to dry or humid breathing gas of...
Effects of four common anticonvulsants on the high pressure nervous syndrome in the rat
high pressure nervous syndrome anticonvulsant drug rat animal
2009/7/8
This study reports results from experiments designed to test common, clinically useful anti-convulsants for their effectiveness, if any, against the high pressure nervous syndrome (HPNS) in rats. Phen...
Artificial arterial blood pressure artifact models and an evaluation of a robust blood pressure and heart rate estimator
Artificial arterial blood pressure a robust blood pressure heart rate estimator
2010/2/25
The KF/SQI-fusion method described in this article was shown to provide an accurate estimate of blood pressure and HR derived from the ABP waveform even in the presence of high levels of persistent no...
The Role of Ultrafiltration Therapy on Blood Pressure of Hypertensive Chronic Hemodialysis Children
Children hemodialysis hypertension hypervolemia ultrafiltration
2009/7/2
Hypervolemia is supposed to be the principal factor in hypertension in chronic hemodialysis adults. In this study, the role of intensive ultrafiltration (UF) treatment to reduce hypertension due to hy...
Effects of Dietary Salt on Blood Pressure,Heart Rate,Extracellular Fluid Volume and Glomerular Filtration Rate in Diabetic Rats
Diabetes blood pressure extracellular fluid volume glomerular filtration rate dietary salt
2009/7/2
In the present study, we aimed to investigate the effects of dietary salt restriction and loading on extracellular fluid volume (ECFV), blood pressure (BP), heart rate (HR), glomerular filtration rate...