搜索结果: 16-30 共查到“医学 nitrogen”相关记录52条 . 查询时间(0.25 秒)
Failure of naloxone or physostigmine to reverse nitrogen anesthesia in guinea pigs
drug anesthesia animal guinea pig naloxone physostigmine
2009/7/16
Stress as well as anesthesia has been reported to stimulate endorphin release. The possibility that the stress of compression at 1 atm/min or nitrogen anesthesia, or both, might release endorphins was...
Effects of variations in time pattern of nitrogen addition on development of HPNS in mice
drug high pressure nervous syndrome animal mice heliox trimix
2009/7/16
The effect of change in injection pattern in nitrogen on threshold pressures of three symptoms associated with compression in helium/nitrogen atmospheres was explored. Excitement threshold pressures d...
Decompression from a deep nitrogen/oxygen saturation dive--a case report
decompression nitrogen human nitrox
2009/7/15
Ten divers participated in a 4.5 d nitrogen/oxygen saturation dive to 165 fsw. There were daily 2 h excursions to 61 msw (200 fsw). The divers breathed air during the excursions and 0.51 bar (0.5 atm)...
A method for measuring nitrogen elimination after air diving has been developed in which a subject breathes air instead of oxygen or helium-oxygen. Accuracy is improved with this method because only n...
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...
An effect of CO2 on the maximum safe direct decompression to 1 bar from oxygen-nitrogen saturation
saturation nitrogen human carbon dioxide
2009/7/14
An investigation into the maximum safe decompression step from oxygen nitrogen saturation to 1 bar was carried out with and without the presence of 0.02 bar carbon dioxide. The series, Islander 1, inv...
In vitro activation of human complement by nitrogen bubbles
decompression nitrogen human complement
2009/7/8
Complement activation may be responsible for some of the symptoms of decompression sickness. In the present study, complement activation was studied by exposing human sera with or without red blood ce...
Moderate hypercapnia:cardiovascular function and nitrogen elimination
CO2 carbon dioxide nitrogen elimination hypercapnia nitrogen cardiovascular
2009/6/12
Elevated carbon dioxide concentrations frequently encountered in diving operations may have cardiovascular effects. If so, changes in nitrogen loading and elimination may be induced. To study this pos...
Exercise effects on central venous nitrogen tensions after simulated non-decompression dives
saturation exercise air dive
2009/6/12
In five subjects we examined the effect of exercise on the pattern of central venous (right atrial) N2 tensions (PVN2) after ascent from simulated non-decompression dives. The dives consisted of expos...
Dissociation of the behavioral and subjective components of nitrogen narcosis and diver adaptation
nitrogen narcosis hyperbaric chamber adaptation
2009/6/12
We investigated adaptation to nitrogen narcosis by compressing 11 highly experienced divers in a hyperbaric chamber to the equivalent of 54.6 meters of seawater once a day for 5 consecutive days. The ...
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...
Probabilistic gas and bubble dynamics models of decompression sickness occurrence in air and nitrogen-oxygen diving
Gerth,WA Vann,RD
2009/6/8
Probabilistic models of the occurrence of decompression sickness (DCS) with instantaneous risk defined as the weighted sum of bubble volumes in each of three parallel-perfused gas exchange compartment...
Change in strategy of solving psychological tests:evidence of nitrogen narcosis in shallow air-diving
Analysis of Variance Atmospheric Pressure Atmosphere Exposure Chambers Diagnosis
2009/6/4
The depths from 10 to 30 m are usually not considered narcotic in scuba air-diving, and evidence of psychomotor disturbances attributable to nitrogen narcosis at these depths is weak and contradictory...
Tissue nitrogen elimination in oxygen-breathing pigs is enhanced by fluorocarbon-derived intravascular micro-bubbles
Algorithms Analysis of Variance Fluorocarbons administration dosage animal Microbubbles
2009/6/3
The present study tested the hypothesis that intravascular micro bubbles generated by i.v. infusion of a 2 % dodecafluoropentane (DDFP) emulsion will enhance tissue denitrogenation during oxygen breat...
The effect of endurance training on the rate of nitrogen elimination in women
DIVERS nitrogen elimination aerobic capacity Decompression Sickness chronic training nitrogen oxygen interval training heart rate exercise
2009/6/2
INTRODUCTION: The rate of nitrogen elimination may be an important factor in evaluating the risk of DCS following dives. The present study determined the reproducibility of a method for evaluating nit...