搜索结果: 1-15 共查到“军事医学与特种医学 nitrogen”相关记录35条 . 查询时间(0.226 秒)
The effect of ambient pressure on inert gas elimination during decompression was investigated using human subjects breathing air in a dry hyperbaric chamber. This was done by measuring nitrogen recove...
Reversal of nitrogen narcosis in rats by helium pressure
nitrogen narcosis nitrogen helium animal rat
2009/7/20
Changes in operant behavior were obtained for rats breathing nitrogen, helium, and both gases combined. Exposure to 12.9 ATA of nitrogen (O2 maintained at normobaric value of 0.2 ATA) produced complet...
Roles of nitrogen,oxygen,and carbon dioxide in compressed-air narcosis
human nitrogen carbon dioxide oxygen compressed-air narcosis
2009/7/20
In an attempt to determine the roles of nitrogen, oxygen, and carbon dioxide in compressed-air narcosis, the effects on performance (mental function and manual dexterity) of adding CO2 in various conc...
Nitrogen elimination during steady-state hyperbaric exposures
Nitrogen elimination human decompression
2009/7/17
Nitrogen elimination was measured in six divers during steady-state exposures in an oxygen-nitrogen atmosphere at 1, 2, and 3 ATA using both oxy-helium and pure O2 as washout gases. This was accomplis...
Effect of helium/nitrogen/oxygen mixtures on HPNS convulsion threshold in euthermic rats
high pressure nervous syndrome trimix convulsion animal rat seizures heliox
2009/7/17
This study compares the effects of various so-called trimix mixtures (10, 20, and 40 percent N2 in He-O2) on the convulsion threshold pressure (Pc) and EEG activity in 60 adult male Wistar rats with c...
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...
Influence of nitrous oxide, nitrogen, neon, and helium on the beating frequency of the mouse sinus node at high pressure
cardiac animal mice nitrous oxide nitrogen neon helium sinus node
2009/7/17
The beating frequency (BF) reducing effect of 150 atm of hydrostatic pressure on mammalian cardiac pacemaker tissue (hyperbaric bradycardia) was counteracted by dissolved gas only if the gas was added...
Lithium effects:protection against nitrogen narcosis, potentiation of HPNS
nitrogen narcosis high pressure nervous syndrome Lithium drug
2009/7/17
The effect of either 10, 8, or 6 meq/kg of intraperitoneal lithium chloride or sodium chloride on the loss of righting response (RR50) produced by 18.2 ATA N2-ATA O2 was examined in rats. Results were...
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...