Samantha Cristoforetti demonstrating Valsalva device

The Valsalva device is a device used in

spacesuit A space suit or spacesuit is a garment worn to keep a human alive in the harsh environment of outer space, vacuum and temperature extremes. Space suits are often worn inside spacecraft as a safety precaution in case of loss of cabin pressure, ...

s, some

full face diving mask A full-face diving mask is a type of diving mask that seals the whole of the diver's face from the water and contains a mouthpiece, demand valve or constant flow gas supply that provides the diver with breathing gas. The full face mask ha ...

s and

diving helmet A diving helmet is a rigid head enclosure with a breathing gas supply used in underwater diving. They are worn mainly by professional divers engaged in surface-supplied diving, though some models can be used with scuba equipment. The upper part ...

s to allow

astronaut An astronaut (from the Ancient Greek (), meaning 'star', and (), meaning 'sailor') is a person trained, equipped, and deployed by a human spaceflight program to serve as a commander or crew member aboard a spacecraft. Although generally r ...

s and

commercial diver Professional diving is underwater diving where the divers are paid for their work. The procedures are often regulated by legislation and codes of practice as it is an inherently hazardous occupation and the diver works as a member of a team. Du ...

s to equalize the pressure in their ears by performing the

Valsalva maneuver The Valsalva maneuver is performed by a forceful attempt of exhalation against a closed airway, usually done by closing one's mouth and pinching one's nose shut while expelling air out as if blowing up a balloon. Variations of the maneuver can ...

inside the suit without using their hands to block their nose. Astronaut

Drew Feustel Andrew Jay "Drew" Feustel (; born August 25, 1965) is an American/Canadian NASA astronaut and geophysicist. Following several years working as a geophysicist, Feustel was selected as an astronaut candidate by NASA in July 2000. He is the veteran ...

has described it as "a spongy device called a Valsalva that is typically used to block the nose in case a pressure readjustment is needed." In November 2011

ESA , owners = , headquarters = Paris, Île-de-France, France , coordinates = , spaceport = Guiana Space Centre , seal = File:ESA emblem seal.png , seal_size = 130px , image = Views in the Main Control Room (1205 ...

astronaut

Samantha Cristoforetti Samantha Cristoforetti, OMRI (; born in Milan on 26 April 1977) is an Italian European Space Agency astronaut, former Italian Air Force pilot and engineer. She holds the record for the longest uninterrupted spaceflight by a European astronaut (1 ...

posted on Twitter a picture of her demonstrating the use of the Valsalva device in the

Sokol space suit The Sokol space suit, also known as the Sokol IVA suit or simply the Sokol (russian: Cокол, , Falcon), is a type of Soviet/Russian space suit, worn by all who fly on the Soyuz spacecraft. It was introduced in 1973 and is still used . The Sokol ...

during suit pressurization. The Valsalva device has also been used for other purposes. On 25 May 2011,

NASA The National Aeronautics and Space Administration (NASA ) is an independent agency of the US federal government responsible for the civil space program, aeronautics research, and space research. NASA was established in 1958, succeeding t ...

reported that during the second spacewalk of

Space Shuttle The Space Shuttle is a retired, partially reusable low Earth orbital spacecraft system operated from 1981 to 2011 by the U.S. National Aeronautics and Space Administration (NASA) as part of the Space Shuttle program. Its official program na ...

mission

STS-134 STS-134 ( ISS assembly flight ULF6) was the penultimate mission of NASA's Space Shuttle program and the 25th and last spaceflight of . This flight delivered the Alpha Magnetic Spectrometer and an ExPRESS Logistics Carrier to the International ...

, Feustel was able to clear tears from his eye by wiggling down far enough in his

Extravehicular Mobility Unit The Extravehicular Mobility Unit (EMU) is an independent anthropomorphic spacesuit that provides environmental protection, mobility, life support, and communications for astronauts performing extravehicular activity (EVA) in Earth orbit. Introduc ...

to use the Valsalva device in his suit as a sponge to clear up

tears Tears are a clear liquid secreted by the lacrimal glands (tear gland) found in the eyes of all land mammals. Tears are made up of water, electrolytes, proteins, lipids, and mucins that form layers on the surface of eyes. The different types of ...

caused because anti-fogging agent (liquid soap) came free from the inside of the helmet and floated into his eye. On 3 April 2001, due to missing Valsalva device in his suit, astronaut

Leland D. Melvin Leland Devon Melvin (born February 15, 1964) is an American engineer and a retired NASA astronaut. He served on board the Space Shuttle ''Atlantis'' as a mission specialist on STS-122, and as mission specialist 1 on STS-129. Melvin was named t ...

suffered an ear injury while training in

Neutral Buoyancy Laboratory The Neutral Buoyancy Laboratory (NBL) is an astronaut training facility and neutral buoyancy pool operated by NASA and located at the Sonny Carter Training Facility, near the Johnson Space Center in Houston, Texas. The NBL's main feature is a la ...

Johnson Space Center The Lyndon B. Johnson Space Center (JSC) is NASA's center for human spaceflight (originally named the Manned Spacecraft Center), where human spaceflight training, research, and flight control are conducted. It was renamed in honor of the late U ...

. On 16 July 2013, EVA-23 was cut short as

Luca Parmitano Colonel Luca Parmitano (born 27 September 1976 in Paternò, Sicily) is an Italian astronaut in the European Astronaut Corps for the European Space Agency (ESA). He was selected as an ESA astronaut in May 2009. Parmitano is also a Colonel and te ...

's helmet of his

suit started filling with water. After the spacewalk during rapid repressurization of airlock, the Valsalva device on Luca's helmet failed and came apart while he tried to use it as it was not water proof.

References

External links

Samantha Cristoforetti demonstrating the Valsalva device
{{space-stub Space technology Space medicine Underwater breathing apparatus components Space suit components