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Microbubble damage to the blood-brain barrier: relevance to decompression sickness
decompression pulmonary blood brain barrier bubbles animal Guinea Pigs
2009/7/8
Decompression sickness affecting the nervous system is still a serious problem in diving, but the mechanisms involved are in dispute. Although microbubbles can be detected in the pulmonary artery on d...
Cerebral blood flow distribution during exposure to 5 bar oxygen in awake rats
decompression CO2 carbon dioxide hypoxia hyperbaric cerebral blood flow cardiac output oxygen animal rat
2009/7/8
The regional cerebral blood flow (rCBF) and cardiac output (CO) were measured in conscious rats by the microsphere method during control, after 5 and 60 min at 5 bar O2, and 5 min after decompression ...
Hyperbaric oxygenation decreases blood flows in normal and septic rats
HBO hyperbaric septic animal rat
2009/7/8
The purpose of the study reported here was to characterize the effects of acute exposure to 100% oxygen at a pressure of 202.6 kPa on hemodynamics and organ blood flow in antibiotic-controlled bacteri...
Effect of a single exposure to hyperbaric oxygen on blood mononuclear cells in human subjects
HBO hyperbaric air
2009/6/12
We studied the effect of a single exposure to a therapeutic profile of hyperbaric oxygen on blood mononuclear cell subset. Twenty healthy volunteers were exposed to 0.28 MPa for 90 min. Thirteen breat...
Influence of hyperbaric oxygen on left ventricular contractility, total coronary blood flow, and myocardial oxygen consumption in the conscious dog
HBO CO2 carbon dioxide hyperbaric cardiac output air dog animal myocardial contractility
2009/6/12
It is known that hyperbaric oxygenation (HBO) decreases total coronary blood flow (TCBF) and cardiac output (CO). To determine whether this is related to an alteration in myocardial contractility, 10 ...
Hyperbaric oxygen, oxygen-ozone therapy, and rheologic parameters of blood in patients with peripheral occlusive arterial disease
HBO hyperbaric arterial disease
2009/6/9
For many years, clinical practice has consolidated the use of both hyperbaric oxygen and oxygen-ozone therapy in the treatment of peripheral occlusive arterial disease (POAD). We investigated the infl...
Effects of pressure on whole blood glucose measurements using the Bayer Glucometer 4 blood glucose meter
hyperbaric chamber Glucometer equipment
2009/6/9
The effect of pressure was investigated on the readings of whole blood glucose obtained from the Bayer Glucometer 4 blood glucose meter which uses the hexokinase enzymatic reaction. Sixteen subjects (...
The authors developed a new apparatus for extracting nitrogen or other inert gases from blood by flushing (sparging) the specimen with another gas. To investigate the utility of the new methodology, t...
Control of blood glucose in a group of diabetic scuba divers
exercise diabetic hyperbaric diver
2009/6/8
A preliminary study to examine the hypothesis that the ability of well-controlled (defined as no hypoglycemic episodes within the last 12 mo., HbAlc < 9.0%, and none of the long-term complications of ...
Reversibility in blood-brain barrier, microcirculation, and histology in rat brain after decompression
decompressio air animal rat
2009/6/8
To examine the changes in blood-brain barrier (BBB), cerebral microcirculation, and histology from 15 min to 72 h after decompression, 90 rats were exposed to experimental compression to 6 atm abs air...
Measurement of cerebral blood flow in rats and mice by hydrogen clearance during hyperbaric oxygen exposure
CO2 carbon dioxide hydrogen hyperbaric cerebral blood flow air animal mice
2009/6/8
The hydrogen (H2) clearance method was adapted for the measurement of regional cerebral blood flow (rCBF) in anesthetized rats and mice during hyperbaric oxygen (HBO2) exposure. Polarographic platinum...
Enhanced aggregability of human red blood cells by diving
hyperbaric human chamber red blood cell aggregation
2009/6/8
In vitro studies have shown that mild pressure increases red blood cell (RBC) aggregation. Enhanced RBC aggregation in pathologic states can drive the circulation into stasis. This investigation exami...
Effect of anti-C5a antibody on blood-lung and blood-brain barrier in rabbits after decompression
decompression pulmonary complement rabbit animal
2009/6/8
The complement activation product C5a may be an important mediator of tissue injury after decompression stress. This study investigated whether the administration of anti-C5a antibody may reduce chang...
Effects of hyperbaric oxygen on ventricular performance,pulmonary blood volume,and systemic and pulmonary vascular resistance
pulmonary cardiovascular hyperbaric air
2009/6/8
The cardiovascular effects of hyperbaric (3 atm abs) air, 100% oxygen, and hyperbaric oxygen (HBO2) at 3 atm abs were investigated in 13 pentobarbital-anesthetized dogs. We measured heart rate, arteri...
Will prior hyperventilation reduce cerebral blood flow during escape from a submarine?
decompression submarin cold exercise decompression
2009/6/5
This study was undertaken to determine if hyperventilation would reduce cerebral blood velocity (CBV) and thereby the risk of decompression illness (DCI) during escape from a submarine and increase th...