Tuesday August 20, 2019

Researchers Discover a Way to Help Astronauts Spending Prolonged Time in Space Come Back to Earth

Dizziness or fainting due to changes in blood flow can occur after lengthy bed rest, among people with certain health disorders

0
//
Researchers, Astronauts, Space
Orthostatic hypotension is the technical term for a temporary drop in blood pressure when a person stands up after sitting or lying down because blood rushes to the feet. Pixabay

Nearly 50 years after man’s first steps on the Moon, researchers have discovered a way that may help astronauts spending prolonged time in space come back to Earth on more stable footing.

Orthostatic hypotension is the technical term for a temporary drop in blood pressure when a person stands up after sitting or lying down because blood rushes to the feet, away from the brain.

Dizziness or fainting due to changes in blood flow can occur after lengthy bed rest, among people with certain health disorders or in the case of astronauts, being in a low-gravity environment.

“One of the biggest problems since the inception of the manned space program has been that astronauts have fainted when they came down to Earth. The longer the time in a gravity-free environment space, the greater the risk,” said Benjamin Levine, Professor at UT Southwestern Medical Center in the US.

Researchers, Astronauts, Space
Nearly 50 years after man’s first steps on the Moon, researchers have discovered a way that may help astronauts spending prolonged time in space come back to Earth on more stable footing. Pixabay

“This problem has bedeviled the space program for a long time, but this condition is something ordinary people often experience as well,” he said in the paper published in the Circulation: Journal of the American Heart Association.

The study included 12 astronauts (eight men and four women, aged 43-56) who spent about six months in space. All performed individualized endurance and resistance exercise training for up to two hours daily during space flight to prevent cardiovascular, bone and muscle deconditioning. They also received a saline infusion upon landing.

The astronauts’ blood pressure was recorded with every heartbeat over each 24-hour period before, during and after their time in space.

The researchers found that there was minimal impact on their blood pressure during all phases of measurement and none of the astronauts in the study experienced dizziness or fainting during routine activities 24 hours after landing.

Also Read- Dog Mounted Camera Allows Dogs to Live Stream from Higher Risk Areas

This is the first study to demonstrate that astronauts do not experience dizziness or fainting during routine activity after landing, as long as they participate in certain types of exercise training while in flight and receive IV fluids when they return to earth.

“What surprised me the most was how well the astronauts did after spending six months in space. I thought there would be frequent episodes of fainting when they returned to Earth, but they didn’t have any,” Levine said.

“It’s compelling evidence of the effectiveness of the countermeasures — the exercise regimen and fluid replenishment,” he added. (IANS)

Next Story

ISRO to Build Centre to Monitor and Protect High Value Space Assets

Space Situational Awareness & Management (SSAM) has become an internationally significant area due to the ever growing manmade space debris population

0
ISRO, Space, Assets
K. Sivan, Chairman of the Indian Space Research Organisation (ISRO), laid the foundation stone for the Space Situational Awareness Control Centre in Peenya, Bengaluru, on Friday. Pixabay

The Indian space agency on Saturday said that the foundation stone for a centre to monitor and protect high value space assets from space debris has been laid.

K. Sivan, Chairman of the Indian Space Research Organisation (ISRO), laid the foundation stone for the Space Situational Awareness Control Centre in Peenya, Bengaluru, on Friday.

“Space Situational Awareness & Management (SSAM) has become an internationally significant area due to the ever growing manmade space debris population and the increased collision threat with operational spacecraft,” ISRO said in a statement.

“ISRO has set up a Directorate of Space Situational Awareness and Management aiming at protecting high valued space assets from space debris close approaches and collisions. To carryout systematically all activities related to SSAM, a control centre is being established at Bengaluru,” the space agency said.

ISRO, Space, Assets
The Indian space agency on Saturday said that the foundation stone for a centre to monitor and protect high value space assets from space debris has been laid. Pixabay

According to ISRO, the control centre would facilitate the intensified activities foreseen for SSAM, in view of the increasing debris population and operational space assets.

The control centre would host a range of activities pertaining to protection of Indian space assets from inactive satellites, pieces of orbiting objects, near earth asteroids and adverse space weather conditions.

It would assimilate the tracking data of inactive satellites from indigenous observation facilities and generate useful information from bare observations through analysis.

Also Read- Artificial Intelligence (AI) can Detect Signs of Irregular Heart Rhythm

For sustainable use of space, the control centre would enable research activities pertaining to active debris removal, space debris modelling and mitigation, the ISRO said. (IANS)