Ultrasound Scans, Emergency Drill amid Spacewalk Preps Today

Tuesday aboard the International Space Station was packed with human research activities helping doctors understand how the Expedition 65 crew is adapting to microgravity. Meanwhile, preparations are ramping up for a Russian spacewalk scheduled for next week.

Four astronauts took turns during the afternoon using the Ultrasound 2 device for artery scans. NASA Flight Engineer Megan McArthur kicked off the biomedical investigation today and scanned Commander Akihiko Hoshide 's neck, clavicle, shoulder and leg arteries in the Columbus laboratory module. Next up, astronauts Thomas Pesquet and Shane Kimbrough took turns as they participated in the ultrasound scanning activities.

McArthur started her day swapping fuel bottles inside the Combustion Integrated Rack before readying a science freezer for a new animal-microbe study due to be delivered on the next SpaceX Cargo Dragon mission. Kimbrough also spent some time setting up Plant Water Management hardware inside the Harmony module for ongoing botany research.

The Celestial Immunity study is still under way aboard the orbital lab as researchers compare donor cells recently launched to the station with those harvested on Earth. NASA Flight Engineer Mark Vande Hei serviced the cell samples inside the Life Science Glovebox possibly helping scientists develop new vaccines and drugs for diseases on Earth.

Four members of the Expedition 65 crew, who rode to the station aboard the Space Crew Dragon Endeavour, also joined up for an emergency drill before lunch today. Kimbrough, McArthur, Pesquet and Hoshide practiced cardiopulmonary resuscitation (CPR), reviewed medical hardware, and rehearsed communication and coordination procedures.

The sixth spacewalk of the year is set for June 2. Cosmonauts Oleg Novitskiy and Pyotr Dubrov will open the hatch to the Poisk module at 1:20 a.m. EDT and exit into the vacuum of space wearing their Orlan spacesuits. NASA TV will begin its live coverage at 1 a.m. of the six-and-a-half hour spacewalk for Russian hardware maintenance and science experiment installations.