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A world-first study has revealed how space travel can lead to a reduction in the number of red blood cells, known as "space anemia
.
" According to a study published in Nature Medicine, scientists' analysis of changes in red blood cell counts in 14 astronauts during a six-month space mission showed that in space, their red blood cells continued to be destroyed, and the number of destroyed red blood cells was higher than that of them.
Before this study, space anemia was thought to be a rapid adaptation of astronauts to the flow of fluids into their upper bodies when they first reached space, causing astronauts' blood vessels to lose 10 percent of their fluids
.
It is thought that to restore balance, 10 percent of the red blood cells in an astronaut's body were rapidly destroyed, and the body's regulation of red blood cells returned to normal after 10 days
The research team of Dr.
Guy Trudell, the lead author of the paper, a rehabilitation physician and researcher at the Ottawa Hospital in Canada, and a professor at the University of Ottawa, found that the destruction of red blood cells is the main effect of astronauts in space, not just the transfer of body fluids.
caused
.
On Earth, our bodies produce and destroy 2 million red blood cells every second
.
The researchers found that astronauts destroyed 54 percent more red blood cells during their six months in space, or 3 million red blood cells per second
The team repeated the same measurements a year after the astronauts returned to Earth and found that red blood cell destruction was still 30 percent higher than pre-flight levels
.
These results suggest that the physiology of astronauts may have changed in space
This finding has several implications
.
First, it supports screening astronauts or space tourists for existing blood or health conditions affected by anemia
