Four astronauts returned to Earth this week from the International Space Station after a medical emergency cut short their mission in what NASA described as its first medical evacuation in 65 years of human spaceflight. At a press conference Wednesday, the crew declined to identify which team member fell ill or describe the medical issue that prompted the early return.
Astronaut Mike Fincke said the crisis unfolded Jan. 7, the day before a planned spacewalk was abruptly canceled. The crew credited an onboard ultrasound machine with playing a vital role in their response to the emergency.
The case illustrates how NASA relies on limited medical equipment and crew training to manage health emergencies in the isolation of space, where rapid transfer to ground-based hospitals is impossible.
Ultrasound Machine Proved Critical During Crisis
Fincke, a NASA astronaut who flew aboard the spacecraft, said the portable ultrasound machine came in “super handy” during the crisis. The crew had already been using the device routinely to monitor their bodies’ adaptation to microgravity, and when the emergency arose, the tool proved critical.
“It really helped,” Fincke said, adding that the onboard equipment differs drastically from medical resources available on Earth. “Of course, we didn’t have other big machines that we have here on planet Earth,” he said. Still, he credited NASA’s preparation regimen. “We do try to make sure that everybody before we fly are really, really not prone to surprises. But sometimes things happen and surprises happen, and the team was ready … preparation was super important.”
Fincke said the device was so valuable that there should be one on all future spaceflights.
Crew Credits Training and Decision-Making
Zena Cardman, who commanded the crew’s return flight aboard SpaceX, said NASA “made all the right decisions” in canceling the spacewalk — which would have been her first — and prioritizing the crew’s well-being.
Japanese astronaut Kimiya Yui said he was struck by how effectively the crew’s preflight training translated to managing the health crisis in real time.
“We can handle any kind of difficult situation,” Yui said. “This is actually very, very good experience for the future of human spaceflight.”
Five-Month Mission Concludes Early
The four-person crew — Fincke, Cardman, Yui, and Russia’s Oleg Platonov — launched from Florida in August 2025 and splashed down in the Pacific off the San Diego coast last week. The mission lasted 5½ months, more than a month shorter than planned.
Their replacements are due to launch in mid-February, though NASA and SpaceX are working to accelerate the flight schedule. Fincke noted that the incoming crew was unable to greet them in orbit as originally planned.
“We were hoping to give them hugs in space, but we gave them hugs on Earth,” Fincke said.