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Control of HPNS in humans during rapid compression with trimix to 650 m (2131 ft)
human trimix HPNS high pressure nervous syndrome rapid compression
2009/7/16
In 1978 a series of deep trimix (He-N2-O2) dives was initiated to establish the relationship between a given nitrogen percentage and the rate of compression required to prevent the high pressure nervo...
Effects of hyperbaric treatment on carbon monoxide elimination in humans
carbon monoxide human treatment carbon monoxide
2009/7/15
A theoretical model of carbon monoxide elimination from the acutely poisoned individual is presented. The model is derived from a one-compartment system with the rate-limiting step that of alveolar ve...
Soleus H reflex studies in humans at 40-70 bar in helium-oxygen-nitrogen (trimix)
decompression human trimix Hoffmann reflex
2009/7/15
Excitability of the Hoffmann (H) reflex was studied in 6 subjects at pressures of 40 to 70 bar during two trimix exposures (10percent N2, 0.5 bar O2, the remainder He; Atlantis II and III simulated di...
Circulatory functions during immersion and breath-hold dives in humans
cardiac output dives humans
2009/7/15
An unusual circulatory state exists in humans immersed in water at or near 35 degrees C. This circulatory state is characterized by a persistent and elevated stroke index (SI) but heart rate (HR) chan...
Effects of ethanol and amphetamine on inert gas narcosis in humans
drug human ethanol alcohol narcosis amphetamine
2009/7/14
The effects of ethyl alcohol (1 ml/kg body weight), dextroamphetamine (15 mg), and nitrous oxide (20percent) on reaction time were investigated in 6 subjects with a 2-, 3-, and 4-choice serial reactio...
Ethanol and venous bubbles after decompression in humans
decompression Ethanol human alcohol
2009/7/9
We exposed 34 subjects to a 48-h, 6.25-msw dive, and administered ethanol (0.5-1.0 ml pure ethanol.kg-1 body weight) orally to 11 of them immediately after direct decompression. Doppler monitoring of ...
Flow velocity in carotid artery in humans during immersions and underwater swimming
exercise immersion cardiac output underwater swimming
2009/6/12
Heart rate and flow velocity in the common carotid artery were examined on eight subjects in various underwater conditions. The heart rate decreased more markedly during whole-body immersion than duri...
Effects of hyperbarism on central respiratory drive and respiratory pattern in humans
multiplace dry hyperbaric
2009/6/12
The aim of our study was to evaluate the effects of increasing pressure (from 1 to 3 and 6 atm abs) on respiratory drive, respiratory pattern, and inspiratory impedance of the respiratory system. Seve...
Arterial oxygen desaturation during apnea in humans
cold saturation CO2 carbon dioxide human air breath hold
2009/6/8
We studied the effect of the human diving response, defined as bradycardia and reduced peripheral blood flow, on arterial hemoglobin desaturation. We induced a diving response of different magnitudes ...
The aim of this study was to compare apneic time with the human diving response, defined as heart rate (HR) reduction and reduced skin blood flow, in groups with varying degrees of breath-hold diving ...
Exposure to increased pressure or hyperbaric oxygen suppresses interferon-gamma secretion in whole blood cultures of healthy humans
Analysis of Variance Atmospheric Pressure CD4-Positive T-Lymphocytes Double-Blind Method Hematocrit
2009/6/5
This study examines the effects of hyperoxia, increased atmospheric pressure, and hyperbaric oxygen on cytokine synthesis. Five healthy volunteers were exposed to 90 min of room air, 100% oxygen, 10.5...
Normobaric oxygen can enhance protein captation by the lymphatic system in healthy humans
Edema Human Lymphatic Vessels Oxygen Protein Denaturation
2009/6/4
The use of normobaric oxygen (NBO) as a first aid tool for decompression sickness (DCS) has been advocated for a long time. Several beneficial effects of NBO have been demonstrated, one of which is th...
Direct ascent from air and N2-O2 saturation dives in humans:DCS risk and evidence of a threshold
animal air Atmospheric Pressure Calibration Chi-Square Distribution Confidence Intervals Databases Factual
2009/6/2
To estimate the risk of decompression sickness (DCS) for direct ascents from depth to the sea surface for personnel who are saturated with hyperbaric nitrogen, we analyzed 586 experimental air or nitr...
Platelet function in humans is not altered by hyperbaric oxygen therapy
Hyperbaric Oxygenation platelet ATP Osteoradionecrosis Humans
2009/6/2
A pilot survey of platelet function was performed on 6 patients undergoing hyperbaric oxygen therapy (2.0 ATA O2 for 2 hours, 6 days/week) for prophylaxis against osteoradionecrosis. Blood was drawn i...
Burns treated with adjunctive hyperbaric oxygen therapy: A comparative study in humans
adjunctive HBO therapy burn mortality statistical analysis human
2009/5/8
Hyperbaric oxygen therapy (HBO) has become common adjunctive treatment for burn patients in the Naval General Hospital at Tsoying. In this study, 266 patients with total body surface area (TBSA) burn...