ABSTRACT
A survey of the results of the experiment "Oxygen," carried out within the scope of the INTER-KOSMOS program in members of the permanent crews and of international visiting expeditions to the Soviet orbital station Salyut-6, is given. During the 7-day space flights of the international visiting expeditions a significant decrease in pO2ic by 3.28 kPa was observed. Local oxygen utilization reduced significantly by 0.44 kPa. During hyperventilation testing after return to earth a statistically significant decrease in the peak value by 1.39 kPa was noted. In the long-term crews of the orbital station Salyut-6 the highest decrease in pO2ic of 3.8 kPa and the absolutely lowest value of 3.4 -/+ 0.5 kPa during space flight were observed. The decrease in local oxygen utilization during the flight of 0.8 kPa/min was greater than that of the visiting crews. The results indicate the importance of investigating the dynamics of the oxygen regimen for medical control of the crew members both during the space flight and during the readaptation phase after return to earth.
Subject(s)
Adaptation, Physiological , Oxygen Consumption/physiology , Skin/chemistry , Space Flight , Weightlessness , Adult , Aerospace Medicine , Breath Tests , Humans , Hyperventilation , Male , Middle Aged , Oxygen/analysis , Partial PressureABSTRACT
The oxygen tension (PO2) in the dorsal skin surface of the forearm was studied during the stay of cosmonauts on board Salyut 6. Between the fourth and fifth day of stay on the orbital station a considerable reduction of the PO2 level was observed. The oxygen utilization values were also reduced. In the early postflight period the low PO2 level persisted with gradual normalization.
Subject(s)
Oxygen Consumption/physiology , Skin/metabolism , Space Flight , Weightlessness , Aerospace Medicine , Humans , Male , Oxygen , Partial Pressure , Skin Physiological PhenomenaABSTRACT
An automatically regulated biofeedback apparatus "UN-1" is described for enabling astronauts to maintain specified levels of exercise or lower body negative pressure within acceptable limits of cardiac function. The apparatus was also used to assess the workload tolerance of cosmonauts during space flight. Under these conditions the cosmonaut was unable to exercise on the cycloergometer when his heart rate reached 140 beats/minute steady state.
