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Long space missions induce blood shift in astronauts

Published

9 years ago

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London: Long space mission induces a blood shift in astronauts from the bottom half of the body to the top that may lead to health problems, say researchers.

“We know that some astronauts experience vision problems some months into space flight and this may, in fact, be caused by the augmented fluid and blood volume shift to the upper body,” said lead study author Peter Norsk, scientist from University of Copenhagen.

For the study, the team measured the volume of blood ejected by the heart into the blood vessels and monitored the blood pressure in eight astronauts aged between 45-53 years.

The recordings were taken before, during and after three-six months of space flight.

They found that the shift of blood and fluid from the lower to the upper body caused by weightlessness was much higher than previously thought.

The blood volume burden to the heart was also more than expected despite the heart rate remaining the same.

At the same time, blood pressure was considerably reduced, which corresponds to the effect of normal blood pressure medication against high blood pressure.

The discovery is important because during long duration missions, the blood volume burden to the heart could constitute a health problem.

Although the blood volume burden to the heart is higher than expected, blood pressure is lower because the blood vessels are more relaxed (dilated).

“In the future, the space flight factors that induce the fluid shifts and relaxation (dilatation) of the blood vessels should be identified,” the authors noted.

The study was published in The Journal of Physiology.

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Apple is giving a huge discount on its gadgets: Details inside

Published

2 years ago

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May 5, 2022

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If you want to buy an iPhone and were waiting for a nice offer, then we have a piece of good news for you! Amazon Summer Sale May 2022 has begun and they are offering major discounts on various smartphones, laptops, and smart TVs, among others.

The sale is live now on the e-commerce platform with no-cost EMI options and exchange discounts on various products. In addition to this, Amazon has also partnered with several banks including ICICI, Kotak Bank, and RBL so that customers get instant discounts of up to 10% using their cards and EMI transactions.

Customers can easily enjoy this summer sale and get massive discounts on iPhones. They can also compare prices on Flipkart Big Saving Days Sale 2022 before making a purchase.

 

Amazon Summer Sale May 2022: Discount offer on iPhone 13 

Apple’s coveted phone model iPhone 13 in the 128 GB storage model will be available during the Amazon Summer Sale May 2022 for Rs 64,900. The MRP of the phone is Rs 79,900. This means that the customers will be able to enjoy a discount of up to Rs 15,000 on the purchase of the iPhone 13.

If you have an old iPhone in working condition then you will also be eligible to receive another additional discount worth up to Rs 17,000 on the iPhone 13.

Buy at Rs. 64,900 (MRP – Rs. 79,900)

Features of Apple iPhone 13 

The iPhone is powered by an A15 Bionic processor with 6 core CPU. Apart from this, it has 16 core neural engines. With the iPhone 13, up to 512 GB of storage will be available. The iPhone 13 has a 6.1-inch Retina XDR display with 1000 nits brightness.

The iPhone 13 has a 12-megapixel dual rear camera setup. This time a new wide-angle camera has been given, whose aperture is f/1.6. With this, there is support for sensor optical stabilisation. Night mode has been made better than before. The second lens is also 12 megapixels ultra-wide and has an aperture of f/2.4.

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