fahrbot-bot shares a report from Ars Technica: Space is not easy for humans. Some aspects are avoidable – the vacuum, of course, and the cold, as well as some of the radiation. Astronauts can also lose bone density, thanks to a lack of gravity. NASA even created a fun acronym for the problems: CRETE, which represents space radiation, isolation and confinement, distance from Earth, gravity fields, and hostile and enclosed environments. New research adds to concerns by describing how being in space destroys your blood. Or rather, something about space – and we don’t know what yet – causes the human body to perform hemolysis at a higher rate than on Earth.
This phenomenon, called space anemia, has been well studied. It’s one of a series of problems astronauts face when they return to terra firma, so Guy Trudel – one of the paper’s authors and specialist in physical medicine and rehabilitation at the Ottawa Hospital – got involved. “[W]When astronauts come back from space, they look a lot like the patients we admit to rehab,” he told Ars. lose 10% of the fluid in their blood vessels, and their bodies were expected to destroy 10% of the corresponding red blood cells to restore balance. People also suspected that things returned to normal after 10 days. Trudel and his team found, however, that hemolysis was a primary response to being in space. “Our results were a little surprising,” he said. […]
Trudel’s team isn’t exactly sure why being in space would cause the human body to destroy blood cells at this faster rate. There are, however, a few potential culprits. Hemolysis can occur in four different parts of the body: bone marrow (where red blood cells are made), blood vessels, liver or spleen. From this list, Trudel suspects that the bone marrow or spleen are the most likely problem areas, and his team plans to investigate the matter further in the future. “What causes anemia is hemolysis, but what causes hemolysis is the next step,” he said. It’s also unclear how long a person in space can continue to destroy 54% more red blood cells than their Earth-bound relatives. “We don’t have data beyond six months. There is a lack of knowledge for longer missions, for one-year missions, or missions to the Moon or Mars or other bodies” , did he declare.
Space anemia is related to being in a vacuum and can stay for a while
Source link Space anemia is related to being in a vacuum and can stay for a while